Obsoleted silk cocoon shell (SCS) possesses a natural hierarchical porous structure and high porosity. However, its inherent hydrophobicity, poor acid-alkali resistance, and weak mechanical strength severely limit its use in oily wastewater purification. To address these issues, this study developed a "hydrogel loading-biomimetic mineralization" synergistic strategy, in which the silk cocoon shell was employed as a natural flexible substrate. This design departed from conventional single-modification strategies and, for the first time, applied a nacre-inspired "organic matrix-inorganic phase" mineralization mechanism to the fabrication of oil-water separation membranes. In this work, a chemically crosslinked PVA/CS composite hydrogel was employed as a flexible organic matrix to address the mechanical weakness and hydrophobicity of SCS. More importantly, under alkaline conditions, the coprecipitation of Ca2+ and PO4 3- ions was precisely controlled, enabling in-situ biomimetic mineralization to form a composite layer of hydroxyapatite (HAP) and titanium dioxide (TiO2) on the membrane surface. The design employs PVA/CS hydrogel to direct the oriented deposition of the inorganic phase (HAP), thereby enhancing the functional integration of the membrane. The study results indicated that the SCPCT/HAP possessed excellent mechanical strength and self-cleaning ability. Under gravity-driven conditions, the obtained membrane exhibited outstanding performance for purifying oil-in-water emulsions (498.01 L m- 2 h- 1, 98.98%) and methylene blue (MB) wastewater. Furthermore, the SC-PCT/HAP exhibited efficient photocatalytic degradation for organic dyes (MB: 92.83%, CV: 93%) and favorable antibacterial activity. This work offers an innovative route for the high-value utilization of obsoleted silk cocoon shell and the development of multifunctional water treatment membranes.

Hydrogels with three-dimensional porous structures and excellent water absorption capability play a critical role in enhancing the interfacial solar evaporation rates. However, the traditional hydrogel preparation processes are complex and time-consuming. In this study, a controllable and rapid gelation strategy was developed based on the synergistic effect of MXene and Zr4+ to construct multifunctional composite hydrogels with a gradient wettability structure for efficient solar steam generation and photocatalytic sterilization. The method enables rapid gelation under facile conditions without external energy input. Additionally, the gelation rate and pore structure of the hydrogel can be precisely controlled. During the rapid gelation process, the hydrogel naturally forms a gradient wettability structure with adjustable pore architecture. This distinctive structure effectively minimizes heat dissipation and enhances the hydrogel's salt tolerance. Owing to the excellent photocatalytic properties of MXene, the fabricated evaporator not only enables efficient seawater desalination but also demonstrates remarkable photocatalytic sterilization against Escherichia coli (E. coli). The prepared composite hydrogel possesses an outstanding evaporation rate of 1.762 kg center dot m- 2 center dot h- 1 and achieves a sterilization efficiency of 99.9 % against E. coli, effectively resisting biofouling. This study developed a novel rapid gelation method for hydrogels with a gradient wettability structure, which synergistically integrates interfacial solar evaporation and photocatalytic sterilization capabilities, offering a new approach to achieving simultaneous seawater desalination and photocatalytic 1 sterilization.

Solar-driven interfacial evaporation represents a sustainable and efficient approach for seawater desalination and wastewater purification. However, developing photothermal evaporators that combine high efficiency, long-term stability, and multifunctionality remains challenging. Herein, an ion-bond-enhanced adsorption strategy was proposed to fabricate a superhydrophilic wood-based evaporator. Using delignified wood as a hydrophilic substrate, Zn2+ ions induce the self-assembly of MXene/carbon black (CB) composite coatings, which significantly enhance optical absorption. The intercalation of CB mitigates MXene nanosheet stacking, thereby addressing insufficient charge exposure and high reflectivity. This synergistic design yields a unique, hierarchical lighttrapping architecture composed of regularly arranged tilted nanosheets, which facilitates broad-spectrum light absorption and enhances photothermal conversion efficiency. The optimized ZWMC6 evaporator achieves an evaporation rate of 2.10 kg m-2 h- 1 with 90% efficiency under 1 sun irradiation, substantially surpassing natural wood (0.93 kg m-2 h- 1, 45%). Moreover, ZWMC6 exhibits strong antibacterial properties (99.96% bacterial removal) and maintains stable evaporation performance with excellent salt-resistant self-cleaning during prolonged operation. This zinc ion-guided coating strategy integrates high evaporation efficiency, antifouling capability, and photocatalytic activity, providing a novel route for functionalizing natural porous materials to-ward high-performance solar evaporation systems.

Dynamic antifouling surfaces have emerged as a promising alternative, offering the potential for eco-friendly and high-performance antifouling coatings. However, the practical deployment of conventional dynamic slippery surfaces is hampered by inherent challenges such as lubricant depletion, mechanical instability, and limited long-term durability. To overcome these limitations, we report a novel slippery liquid-infused composite organogel (OG/PTA) designed to incorporate an inner antibacterial molecule that is released upon depletion or loss of the surface lubricant layer. Through a simple yet universal phase-change-induced fabrication strategy, the coating employs a multi-modal antifouling strategy, combining active release of tannic acid, intrinsic hydrophobicity, nonpolar surface properties, and dynamic liquid lubrication. Collectively, this synergistic design confers broad-spectrum resistance against fouling from proteins, bacteria (i.e., 97.45% for Escherichia coli), and microalgae (i.e., 97.76% for Phaeodactylum tricornutum). Furthermore, the OG/PTA coating exhibits ultra-low surface roughness with a Ra of 1.02 nm, high tensile strength of 11.5 MPa, and rapid self-cleaning capability. Remarkably, the OG/PTA coating also demonstrates reliable durability under repeated abrasion of 100 cycles, together with exceptional performance in anti-icing, anti-corrosion, and optical transparency. This work establishes a new paradigm in the design of liquid-infused organogel coatings, paving the way for robust dynamic lubricating interfaces with promising real-world applications.

Industrial oily wastewater treated with membranes typically contains recalcitrant contaminants such as emulsified oil droplets, dyes, and antibiotics, which readily form a stubborn "oil-cake" layer on membrane surfaces, causing flux decline and irreversible fouling. Therefore, achieving the synergy of high-efficiency separation with in situ contaminant degradation has become a central challenge in membrane materials design. In this study, a layer-by-layer self-assembly strategy applicable to various porous substrates is developed. Specifically, tannic acid/regenerated silk fibroin (TA/SF) constructs a bioadhesive layer; bimetallic Fe/Cu coordination forms a stable metal-phenolic network (MPN), which markedly enhances catalytic-site stability and electron-transfer efficiency; and a durable hydrogel layer is then generated via polyvinyl alcohol (PVA) hydrogen-bond cross-linking, yielding a TA/SF-Fe/Cu MPN-PVA composite coating (TSMP). This three-layer synergistic coating-"adhesive fixation, metal coordination, and hydrogel crosslinking"-endows the membrane surface with superhydrophilicity/underwater superoleophobicity, anti-fouling, and self-cleaning capability. Under visible light/H2O2 conditions, the coating activates a photo-Fenton-like cycle, enabling in situ oil removal and pollutant degradation on the membrane. The strategy exhibits excellent compatibility and structural stability across distinct substrates, such as polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), and natural palm bark. In pressure-driven separation of oil-in-water emulsions, TSMP-modified membranes achieved a flux of 1201.4 L m-2 h-1 bar-1 and a separation efficiency of 99.85%. After photo-Fenton self-cleaning, the flux recovery ratio (FRR) reached up to 90.37%. Meanwhile, TSMP-modified membranes exhibited excellent degradation efficiencies toward organic pollutants, including methylene blue, methyl orange, and representative antibiotics, while maintaining good cycling stability. Hence, the constructed supramolecular fiber-polyphenol functional coating offers a low-energy, scalable, and universal separation-degradation solution for complex oily organic wastewater.

Solar-driven evaporation-adsorption for lithium extraction from seawater can improve the adsorption efficiency towards lithium ions, however, the fabrication of conventional solar-driven evaporation-adsorption materials offen suffers from secondary pollution. To address these issues, this study developed a biomass-based evaporation-adsorption material PVV@VLJ-LIS by synergistically utilising multiple components of Vaccinium bracteatum Thunb. leaves, enabling the integrated coupling of interfacial evaporation and selective lithium adsorption. A freezing and salting out strategy was employed to crosslink a poly(vinyl alcohol) hydrogel and a VLJ-modified titanium-based lithium-ion sieve on the evaporator surface, thereby achieving in situ self-assembly between the organic components from the leaves and the lithium-ion sieve. VLJ endows PVV@VLJ-LIS with broadband photothermal absorption and antibacterial activity, and simultaneously promotes interfacial Li+ diffusion kinetics. Meanwhile, P-VLR serves as a porous supporting framework, facilitating the fixation of the lithium-ion sieve and water transport. Under 1 sun irradiation, the PVV@VLJ-LIS evaporator achieved a photothermal evaporation rate of 1.61 kg/(m2·h) with an evaporation efficiency of 80

Biomass materials have gained considerable attention in seawater desalination because of their natural hydrophilicity, porous structures, tunable morphologies, and low cost. However, conventional biomass-based evaporators typically suffer from low evaporation efficiency, limited durability, and single functionality. Moreover, few studies have combined animal adhesion mechanisms with the morphological advantages of plants to construct multifunctional three-dimensional evaporators. In this study, a dual bio-inspired strategy, integrating mussel adhesion mechanisms with flower-like morphological characteristics was applied to fabricate a superhydrophilic cellulose filter paper via a layer-by-layer self-assembly approach, which was subsequently folded into a three-dimensional flower-like architecture, yielding a multifunctional 3D evaporator (PDA/PEI-TA/ Fe3+@FPF). The PDA/PEI-TA/Fe3+ coating was constructed by the simultaneous deposition of polydopamine and polyethyleneimine, which immobilized tannic acid-iron complexes on the evaporator surface. This robustly anchored layer endowed the evaporator with improved photothermal conversion capability. By combining the hierarchical flower-like 3D architecture with the PDA/PEI-TA/Fe3+ coating, the evaporator achieves an evaporation rate of 2.17 kg m- 2 h- 1 under one sun illumination, which is approximately 3.6 times higher than that of its 2D counterpart. Moreover, the PDA/PEI-TA/Fe3+ coating exhibits photocatalytic activity toward organic pollutant degradation, achieving an 85.4% removal efficiency of methylene blue within 4 h. Additionally, the study results demonstrate that the evaporator possesses directional salt collection capacity, strong antibacterial and antifouling properties, as well as favorable scalability, highlighting its multifunctionality and unique potential for practical seawater desalination.

The ocean contains abundant water and lithium resources, and extracting lithium from natural seawater is regarded as one of the most effective methods to address the shortage of lithium resources. Adsorption is a highly effective method for capturing lithium. However, traditional adsorption materials are hindered by low capacity, slow kinetics, and poor selectivity. Therefore, this paper developed a novel strategy of solar-driven for enhancing lithium-ion adsorption by synthesizing a new type of adsorbent (ACT-Li). This approach increases the temperature and lithium concentration in the micro-environment at the interface between the adsorbent and seawater, thereby improving both the lithium adsorption capacity and rate while simultaneously generating freshwater from seawater. Experimental results demonstrate that ACT-Li achieves a photothermal conversion efficiency of 97.61 % under single solar irradiation. Furthermore, light significantly increases both the diffusion rate and adsorption capacity of lithium ions, and compared to dark conditions, the adsorption capacity of lithium ions in ACT-Li increased by 35.28 %. In simulated seawater, the adsorption capacity for lithium ions can reach 31.83 mg/g, indicating strong selectivity of ACT-Li for lithium ions. The developed ACT-Li features a simple preparation process, high photothermal conversion efficiency, strong water transport capabilities, and high lithium extraction efficiency from seawater, providing a novel strategy for lithium extraction and opening new avenues for the utilization of marine resources.

Titanium-based lithium ion sieves (HTO) possess stable chemical properties and high selectivity for lithium extraction from seawater, yet their practical application is hindered by challenges of difficult powder recovery, severe particle agglomeration, and limited adsorption capacity. In this study, a novel photothermal-driven adsorbent (PGST@HTO-Fe) was successfully constructed by incorporating Fe-doped lithium-ion sieves (HTO-Fe) into a high-strength and superhydrophilic hydrogel with a three-dimensional network structure via a Ca2+ dual-crosslinking strategy. More importantly, this structural design enables the uniform dispersion of HTOFe within the hydrogel matrix, effectively overcoming the inherent drawbacks of powder-type lithium-ion sieves, such as difficult recovery and particle agglomeration. In addition, PGST@HTO-Fe exhibits excellent anti-oilfouling performance, which is advantageous for stable operation in complex water environments. Fe doping effectively modulates the electronic structure of HTO and increases the concentration of oxygen vacancies, thereby lowering the Li+ diffusion energy barrier and enhancing the adsorption capacity by 24.3%, which was supported by density functional theory (DFT) calculations. Under one standard solar illumination, PGST@HTOFe achieved an evaporation rate of 1.796 kg & sdot;m- 2 & sdot;h- 1 and an average solar absorption of 94.5%. It also showed high selectivity for Li+, with an equilibrium adsorption capacity of 25.28 mg & sdot;g- 1. Notably, the Li+ diffusion was remarkably enhanced by light irradiation, leading to a 32.3% increase in equilibrium adsorption amount compared with dark conditions, confirming that the photothermal effect facilitates lithium adsorption performance. In addition, PGST@HTO-Fe demonstrated a photocatalytic degradation efficiency of 82.2% for methylene blue within 4 h. This multifunctional material provides a promising strategy to ensure the sustainable supply of lithium resources and address water scarcity.

Marine antifouling coatings are critical for protecting ships and offshore industrial equipment from biofouling and corrosion. However, conventional coatings often fail to balance antifouling and anti-corrosion performance with mechanical stability. In this paper, a pH-responsive antibiofouling composite coating (OC-MCSX) with slippery liquid-like properties and long-term functionality was developed. The coating was fabricated by covalently grafting PDMS brushes into an epoxy matrix via thermal crosslinking, while incorporating micro-encapsulated 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT) as a functional filler. The highly crosslinked network significantly enhanced the OC-MCSX's mechanical strength, whereas the pH-responsive microcapsules enabled precise controlled release of antifoulants. Furthermore, this design integrates a low-surface-energy fouling-release mechanism with a contact-inhibition antifouling strategy. Through the synergistic effects of surface interface regulation and controlled-release antifouling agents, it effectively suppresses the adhesion and accumulation of biofouling, thereby achieving stable and long-lasting antifouling performance. The experimental results showed that the composite coating with 3 wt% microcapsule loading (OC-MCS3) exhibited remarkable antibacterial efficacy, the antibacterial rates against E. coli and S. aureus are 98.25 % and 99.56 % respectively, inhibition rates of 88.22 % against chlorella and 93.13 % against diatoms, and a pseudo-barnacle removal strength of only 0.053 MPa. In addition, the coating exhibited excellent resistance to a wide range of solid and liquid contaminants, along with superior self-cleaning ability. After 60 days of marine immersion testing, the OC-MCS3 coating showed no significant biofouling coverage compared with control samples, confirming its excellent anti-fouling stability. This research proposes a prospective tactic for developing environmentally friendly and durable anti-fouling coatings for ships.

The dynamic behavior of the droplet and the liquid filament in the liquid jet process is widely encountered in natural phenomena and scientific problems. In this work, the liquid jet process is investigated by employing a phase field-based lattice Boltzmann model, and the influences of Reynolds number (Re), Weber number (We), and Ohnesorge number (Oh) on the dynamic behavior of the droplet and the liquid filament in this process are discussed comprehensively. Firstly, the static droplet is simulated and the results are validated against the Laplace law, then the liquid filament breakup processes at different wavenumbers are discussed, and the produced droplet sizes are analyzed quantitatively for validation. The results show that the Re affects the produced droplet number and the penetration length in the liquid jet process, and a high Re number leads to pronounced droplet fragmentation and an increased penetration length. The droplet shape is affected by the We number, and a high We number results in unstable and irregularly shaped droplets. The liquid jet fragmentation and the droplet size are affected much by the Oh number, and a high Oh number results in small droplet sizes, which further enhances the liquid jet breakup.

Conventional porous membrane fabrication techniques, such as electrospinning, freeze-drying, and 3D printing, are often complex and prone to secondary contamination, which limits their widespread application. Therefore, developing low-cost, easily fabricated, and scalable porous superwetting membranes for emulsion separation is of significant importance. Mycelium, as a bio-material with tunable pore structures, self-growth capabilities, biodegradability, and low cost, shows great potential for applications in oily wastewater treatment. In this study, a controllable self-growth strategy combined with green chemical modification was employed for the first time to successfully fabricate a highly hydrophilic and underwater superoleophobic porous mycelium membrane (MM@N-PT). Results demonstrate that the membrane achieves efficient separation of oil-in-water emulsions under gravity-driven conditions and exhibits excellent chemical stability under harsh acidic, alkaline, and highsalinity environments. Moreover, the MM@N-PT membrane exhibits strong dye adsorption capacity, effectively removing methylene blue, and achieves a removal efficiency of up to 99.4 % for Pb2+ ions from emulsions under optimal conditions. This multifunctional and environmentally friendly novel membrane is expected to bring significant advancements to the field of wastewater treatment.

The liquid-vapor phase change process, as a complex two-phase phenomenon involving coupled heat and mass transfer, is ubiquitous in numerous engineering and scientific applications. In this study, an efficient phase-field-based lattice Boltzmann model capable of simulating bidirectional phase transitions under natural conditions, including liquid evaporation and vapor condensation, is developed, which represents a first in the lattice Boltzmann community. In the model, the conservative Allen-Cahn equation and the incompressible Navier-Stokes equations considering the phase change effect are solved using the multiple-relaxation-time lattice Boltzmann scheme, and the temperature equation with phase change is solved in the finite difference method. To evaluate the accuracy of the proposed model, the droplet evaporation and growth in the open space and on a heated/cooled plate are simulated, respectively, and the results are validated against the D-2 law and the Laplace law. Besides, the bubble growth, departure, and rising process in viscous liquid is carried out in three dimensions, and the C-D-Re correlations are compared with the experimental formula. It is confirmed that the proposed model demonstrates efficient and unique capability in simulating the liquid-vapor bidirectional phase transformation process.

This study introduces a novel dictyophora-based evaporator, SCNT/TiO2@PAM-DIC, developed through a pioneering sericin bidirectional crosslinking strategy. This innovative material boasts a range of advantages, including environmental friendliness, salt resistance, antibacterial properties, acid and alkali resistance, oil repellency, and pressure resistance. By incorporating polyacrylamide (PAM) hydrogel enhanced with sericin, SCNT/TiO2@PAM-DIC significantly improves the mechanical strength of dictyophora while offering anti-fouling, antibacterial, and high-efficiency evaporation capabilities. Unlike its predecessor DIC, SCNT/TiO2@PAM-DIC retains a porous structure with a smoother surface, enabling multiple sunlight reflections and prolonged exposure, which enhances its solar absorption to an impressive 93 %. Photothermal conversion studies reveal that SCNT/TiO2@PAM-DIC achieves a surface temperature of 63.5 degrees C within 5 min, surpassing DIC (29.1 degrees C) and S@PAM-DIC (30.9 degrees C). The evaporation rate of SCNT/TiO2@PAM-DIC is significantly higher at 2.495 kg m-2 h-1, compared to 1.149 kg m-2 h-1 for DIC and 1.433 kg m-2 h-1 for S@PAM-DIC. Additionally, its dark evaporation rate is 1.8 times that of pure water. The material's exceptional salt rejection and self-cleaning properties are attributed to the presence of zwitterionic groups in its structure. Mechanically, SCNT/TiO2@- PAM-DIC demonstrates superior compressive performance and stability, with compressive stresses of 0.516 MPa at a 25 % compression ratio, significantly higher than DIC's 0.104 MPa. Furthermore, it achieves an 83.5 % photocatalytic degradation efficiency of methylene blue within 3 h. Its robust performance in challenging environments, such as oily wastewater, emulsified oil, organic dyes, and acidic/alkaline solutions, positions SCNT/ TiO2@PAM-DIC as a promising solution for advanced water purification technologies, offering a new avenue for sustainable water treatment.

With the development of nuclear industry, the prevention and control of radioactive risks remains a critical challenge. Radioactive wastewater contains various radionuclides, such as 90 Sr, 137 Cs, and 239 Pu, which pose threats to both the environment and human health. Effective treatment and purification of radioactive wastewater are therefore crucial. Adsorption methods, due to their efficiency and energy-saving characteristics, play a crucial role in radioactive wastewater purification technologies. This review summarizes the research progress on adsorption materials used for radioactive wastewater purification, including natural adsorbents, composite adsorbents, engineered adsorbents, adsorption membrane materials, and photothermal evaporation adsorbents. The advantages, disadvantages, and future prospects of these materials are analyzed. Studies indicate that adsorption materials hold great potential in the field of radioactive wastewater treatment, and however, issues such as low adsorption capacity, insufficient selectivity, and the risk of secondary contamination still remain. This paper reviewed the research advances of adsorption materials used for the purification of radioactive wastewater, and discussed their advantages, limitations, and future research directions.

Silk fibroin (SF) has attracted wide attention due to its excellent biocompatibility and versatile adjustability. The regeneration and reutilization of silk fibroin can efficiently utilize waste cocoons and silk. However, the regenerated SF hydrogels suffer from inadequate mechanical properties and lack inherent antibacterial capabilities, limiting their application in seawater desalination. This study achieved a novel hydrogel (STS@Fe) with photothermal antimicrobial activity, good mechanical property, and excellent durability using a green dualdirectional crosslink and meso-reconstruction strategy. The metal-phenolic networks (MPN) were synthesized utilizing the natural plant polyphenol tannic acid (TA) and Fe3O4 nanoparticles. This research incorporated MPN into dissolved and regenerated silk fibroin and sodium alginate solution, enhanced mechanical properties through cryogenic salt precipitation, and prepared STS@Fe hydrogel. The inherent photothermal properties of Fe3O4 nanoparticles and TA complex, coupled with their synergistic effect under near-infrared radiation, can confer excellent photothermal-enhanced antibacterial activity to the fibroin hydrogel. The tensile strength of STS@Fe hydrogel is enhanced 31 times than that of traditional fibroin hydrogel, and its evaporation rate is 4.77 times higher than that of pure water evaporation. The hydrogel has an efficient seawater desalination rate and outstanding antibacterial properties in real seawater conditions. Moreover, The STS@Fe shows effective treatment capabilities for dyeing wastewater and oily saline water.

Abstract The sustainable, low-energy, and cost-effective treatment of oily wastewater has become an important issue for aquatic ecosystems, environmental protection, and economic development. Improper treatment could have a significant impact on aquatic ecosystems, resulting in eutrophication and fish deaths. The method for preparing PVDF-CC by impregnation involves using polyvinylidene fluoride (PVDF), chitosan, and sodium citrate. Moreover, these performance improvements can be achieved at a lower cost compared to using many other chemical agents in membrane processing.

Recently, the recovery and reuse of natural fibers have gained much attention. However, kapok fiber as a kind of natural cellulose fiber is difficult to recycle because of its poor mechanical property. In this study, a facile, universal, and brand new strategy was proposed by taking the partial dissolution and self-assembled regeneration of cellulose for fabricating regenerated kapok fibers (R-KFs). The R-KFs exhibit compact fiber structure, and the structural densification obtained in the cellulose dissolution and self-assembled regeneration process make the fibers possess high strength. Then, the tensile strength of R-KFs is enhanced 37 times compared to the original kapok fibers, which can efficiently break through the limitation of weak mechanical property of kapok fibers for constructing functional material to broaden its application in other fields. Furthermore, the regenerated kapok cellulose fibers achieve strong hydrogen bonding networks and unique multilayer structures so as to exhibit the remarkable properties of superhydrophilicity and stability. Thus, under gravity-driven filtration, the as-prepared R-KFs showed excellent purification efficiency of 99.9% for oily wastewater, and furthermore, the R-KFs achieved superior flux (3.8 x 104 L m-2 h-1) and favorable reusability (30 cycles). It is the first time to achieve the regeneration and recycling of waste kapok fibers, and moreover, such a green, simple, and highly efficient strategy developed in this study for the recovery and reapplication of kapok fibers can be extended to recycle and reuse other natural fibers and cellulose materials similar to kapok fibers.

To avoid resource wastage and secondary environmental pollution, recycling and reusing waste wood powder is still a great challenge. Moreover, the poor viscosity and irregular pore size of wood powder limit its practical application. This study employed a green and convenient wood powder reconstitution strategy to achieve highly adhesive bonding and pore size control between wood powder particles, thus preparing a high-strength and super hydrophilic wood powder membrane. The wood powder fibers were partially dissolved and regenerated to create a reconstituted wood powder hydrogel membrane, using waste wood powder as the raw material. The wood powder reconstitution strategy offers advantages such as environmental friendliness, simplicity, cost-effectiveness, and strong universality. Furthermore, the materials exhibit excellent self-cleaning properties and superhydrophilicity. Driven by gravity, the membrane can purify oily wastewater and dyes. Additionally, the reconstitution strategy offers a new pathway for recycling wood powder.