A Comparative Study of GO/TiO₂/SiO₂ Catalysts for the Photocatalytic Degradation of Methylene Blue and Phenolic Compounds

Environmental Quality Management, Journal Year: 2025, Volume and Issue: 34(3)

Published: Feb. 12, 2025

ABSTRACT This study scrutinizes the photodegradation efficacy of methylene blue (MB) and selected phenolic compounds, emphasizing variables such as pH, catalyst dosage, initial pollutant concentration. Employing a GO/TiO₂/SiO₂ composite (NC‐II) composed 50:50% TiO₂ SiO₂, research identifies NC‐II optimal catalyst, achieving up to 100% degradation MB under ideal conditions (0.5 ppm concentration, pH 10). For degradation, maximal rates were recorded alkaline (pH 8–10), with reaching 84.6% at 10, surpassing 46.5% observed for NC‐I 37.7% NC‐III same level. Results also indicate that an increase in dosage 0.3 g enhances rates, 63.7% this contrast 17.8% 53.1% NC‐III. In case efficiencies varied between 55% 86%, demonstrating highest capability, 86% Bisphenol A dosage. The 4‐chlorophenol phenol was more pronounced neutral (5–6), zero‐order kinetics producing superior regression coefficients ( R 2 = 0.91–0.99) compared pseudo‐first‐order models. Moreover, maintained over 80% efficiency across five reusability cycles, underscoring its durability minimal decline performance. substantiates TiO₂:SiO₂ composites cost‐effective, high‐performance catalysts suitable diverse environmental conditions, where adjustments can further refine different types.

Language: Английский

Optimizing Graphene Oxide Content in Cellulose Matrices: A Comprehensive Review on Enhancing the Structural and Functional Performance of Composites

Encyclopedia, Journal Year: 2024, Volume and Issue: 4(4), P. 1827 - 1856

Published: Nov. 29, 2024

The incorporation of graphene into cellulose matrices has emerged as a promising strategy for enhancing the structural and functional properties composite materials. This comprehensive review provides critical analysis recent advances in optimizing content its impact on performance. Various optimization techniques, including response surface methodology, particle swarm optimization, artificial neural networks, have been employed to identify optimal concentrations processing conditions. Quantitative analyses demonstrate significant improvements mechanical properties, with notable increases tensile strength Young’s modulus reported graphene/microfibrillated composites. Substantial enhancements thermal stability observed lysozyme-modified nanoplatelet–cellulose Electrical conductivity achieved at low loading levels. Additionally, barrier biocompatibility, functionality applications such energy storage environmental remediation substantially improved. explores case studies encompassing conductivity, viscosity, durability behaviors, pollutant removal, various other properties. Despite results, challenges remain, uniform dispersion, scalability, cost-effectiveness, long-term stability. Strategies functionalization, solvent selection, protective coatings are discussed. Future research directions, novel techniques like 3D printing electrospinning, well additional materials, outlined. synthesizes current knowledge, identifies emerging trends, roadmap future rapidly evolving field graphene–cellulose

Language: Английский