The inefficient removal of recalcitrant organic pollutants such as synthetic dyes and pharmaceutical compounds from wastewater remains a major environmental challenge, particularly when conventional adsorption or single advanced oxidation processes are applied. In this study, a magnetically recoverable Fe3O4-loaded activated carbon composite catalyst was synthesized via a facile, scalable, and cost-effective method and applied for the heterogeneous catalytic ozonation of Direct Red 23 dye and tetracycline hydrochloride as representative organic contaminants. The composite catalyst exhibited a synergistic adsorption–ozonation behavior, resulting in significantly enhanced degradation efficiency compared to pristine activated carbon. Under optimal reaction conditions, approximately 99.5
In this work, a novel high-performance lithium-ion battery (LIB) separator based on chain-extended poly(butylene adipate-co-terephthalate) (CE-PBAT)/modified-polypropylene with the combination of the beneficial attributes of synthetic and biodegradable (with a significant biodegradation rate) polymers was proposed. The gravure printing technique joined to a compounding process produced a very thin nano-porous separator with an extraordinary morphology (cavity size = 68 nm and the number density of holes 16 μm−2 with ∼ 43
In this study, ternary composites of MIL-101(Fe) with TiO2 using different amounts of GO were synthesized and utilized for photocatalytic destruction of methylene blue (MB) and tetracycline. MIL-101/TiO2/GO ternary composites were prepared using three different amounts of GO (5, 10, and 15 wt% denoted as MIL/TiO2/(5 %) GO, MIL/TiO2/(10 %)GO, and MIL/TiO2/(15 %)GO, respectively). Characterization of the fabricated samples was conducted through XRD, FESEM, EDX, BET-BJH, FTIR, DRS and PL analyses. The effects of operational parameters on contaminant degradation were studied. The ternary composite with 5 wt% of GO displayed the best efficiency in photocatalytic reaction. Dye degradation was 98 % after 120 min of light radiation (visible LED) using 0.15 g/L of MIL/TiO2/(5 %)GO ternary composite. By increasing MB concentration, penetration length of light and photons in the reaction medium was significantly reduced. Thus, lower excitation of photocatalysts led to the less generation of electron-hole pairs and thereby less production of active radicals. The MB degradation ability remained satisfactory after five recycling cycles (98 %, 95 %, 92 %, 90 %, and 88 %). Also, the synthesized composite degraded tetracycline. Creating a heterojunction structure of MOF and TiO2 along with incorporating the optimal amount of GO (MIL/TiO2/(5 %)GO) led to a high activity for the photocatalytic degradation of pollutant.
The distinct electrical and magnetic characteristics of its lanthanide (Ln3+) ions have made lanthanide-based Metal-Organic Frameworks (Ln-MOFs) an important family of materials. This paper offers a thorough summary of how these ions' unique f-orbitals allow for a variety of innovative applications, especially in the areas of energy storage, corrosion prevention, and smart sensing. After providing an overview of the synthesis processes of Ln-MOFs, which frequently involve solvothermal or hydrothermal methods, the paper provides a detailed account of their complex structures, emphasizing their large surface areas, high porosity, and adjustable frameworks. The coordination chemistry basics of these MOFs are covered in considerable detail, highlighting the vital function of the f-orbitals, which are protected from outside ligands and environments and maintain the inherent characteristics of the lanthanide ions. Their multifunctional capabilities are largely due to the persistent magnetic moments and bright, distinctive luminescence spectra that result from this shielding. The review's main focus is on the various uses of MOFs based on lanthanides. Since their porous nature allows them to incorporate corrosion inhibitors for on-demand release, lanthanide structures are being considered as possible protective coatings or self-healing systems for corrosion protection. The article looks at how they are used in energy storage in supercapacitors and batteries, where their large surface area and structural stability allow for dependable cycling performance and quick ion diffusion. Lastly, the paper explores their application in smart sensing, where Ln-MOFs' special luminescence characteristics, specifically, their long luminescence lifetimes and narrow emission bands, make them perfect for highly sensitive and selective analyte detection. The purpose of this review is to provide insights for future materials science research and development by relating the advanced functionalities of Ln-MOFs to the basic coordination chemistry of lanthanides.
For the first time, a horned nano-giant structure was prepared as a corrosion inhibitor. First, V2C-MXene nanosheets were synthesized in the aqueous solution of LiF/HCl and modified with 3-aminopropyltriethoxysilane (APTES). In the second step, bimetallic zeolitic imidazolate framework (BZIF) was simply grown in situ on silanized V2C-MXene (S@V2C) nanosheets. In the third step, zinc nitrate hexahydrate and dopamine hydrochloride as corrosion inhibitor molecules were loaded into BZIF-decorated V2C-MXene to synthesize the BZIF/ S@V2C-ZD. Taking advantage of the extended specific surface area and large porosity of BZIF/S@V2C-ZD resulted in active corrosion performance due to the controlled release of Zn-dopamine complexes as anodic and cathodic inhibitors. The prepared compound was added to the saline solution to measure the magnitude of the anticorrosion coating system. The anti-corrosion capability was evaluated through potentiodynamic polarization and EIS assessments. Thereafter, the anti-corrosion ability and adhesion durability of the nano-giants-loaded epoxy resin (ER) covered on the surface of the steel plate were evaluated by EIS, pull-off, and salt spray analyses in saline solution. Surface modification of V2C-MXene with APTES and decoration with BZIF improved dispersity among the epoxy resin matrix. The results demonstrated an enhancement of corrosion efficiency more than 1.7 times that of pure epoxy (ER-Blank@31,019 Omega.cm2), confirming the self-healing properties of ER-BZIF/ S@V2C-ZD. The impedance enhancement of the intact (unscratched) ER-BZIF/S@V2C-ZD was approximately 27 % higher than that of the ER-blank. In summary, this innovative horned nano-giant hybrid not only significantly improved the corrosion resistance and self-healing performance of epoxy coatings but also opened up a promising pathway towards multifunctional protective nanocomposites.
