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.
A visible light-responsive heterostructured magnetic metal-organic framework (MOF), ZnFe2O4/TiO2/HKUST-1, its preparation, and performance in the degradation of methylene blue (MB) and methyl orange (MO) dyes were compared with the performance of ZnFe2O4/TiO2 and ZnFe2O4 nanoparticles. Removal experiments were conducted under various conditions, including pH, photocatalyst mass (g), temperature (degrees C), and dye concentration (mg/L), and the effect of each of these factors on photocatalyst performance was evaluated. Under optimal conditions, the ZnFe2O4/TiO2/HKUST-1 photocatalyst exhibited degradation efficiencies of 97.88 % and 98.93 % for MB and MO dyes, respectively. The results indicate that after 5 cycles, the photocatalyst recovery efficiency is 93.68 % and 95.01 % for MB and MO dyes, respectively. Based on the findings derived from the experiments concerning the degradation of MB and MO dyes, the peak correlation coefficients recorded was 0.9956 and 0.9799, respectively, which pertain to the intraparticle diffusion (IPD) kinetics. Furthermore, evaluation of thermodynamic parameters showed that the Gibbs free energy changes (Delta G degrees) were negative at all temperatures investigated in the MB and MO photocatalytic processes, indicating that these processes occur spontaneously. In addition, the negative enthalpy changes (Delta H degrees) during the removal process using ZnFe2O4/TiO2/HKUST-1 indicate the exothermic nature of this process.
Background: This research aims to develop a multifunctional nanohybrid filler that simultaneously enhances mechanical durability and electromagnetic interference (EMI) shielding in polymeric coatings. The study addresses the challenge of integrating high-performance materials into flexible and scalable platforms suitable for advanced applications. Methods: The nanohybrid was synthesized via in-situ growth of bimetallic (Co and Zn) zeolitic imidazolate frameworks (BZIF) on 3-Aminopropyltriethoxysilane (APTES)-functionalized VAC MXene nanosheets (A@MX), followed by surface modification with zinc-dopamine (ZD) complexes. This low-temperature, solvent-free approach enabled uniform porous framework formation. XPS analysis confirmed the presence of Co2+, Co0, Co-Nx, Zn2+, N, and Si, validating the incorporation of BZIFs, APTES, and ZD moieties. Significant Findings: The hierarchical ZD/BZIF/A@MX structure provided synergistic interfacial interactions and multivalent active sites, significantly enhancing the performance of epoxy-based coatings. Compared to neat epoxy, the hybrid coating showed a 4.125 times increase in toughness, over 3.16 times higher Young's modulus, and 1.27 times greater elongation at break. EMI shielding effectiveness exceeded 47 dB in the X-band, tripling the performance of coatings with individual components. Thermal stability also improved notably. These results demonstrate the nanohybrid's potential for use in flexible electronics, aerospace, and structural applications requiring robust mechanical, thermal, and EMI shielding properties.
