A Review of Visible-Light-Active Zinc Oxide Photocatalysts for Environmental Application

Catalysts, Journal Year: 2025, Volume and Issue: 15(2), P. 100 - 100

Published: Jan. 22, 2025

Zinc oxide (ZnO) photocatalysts have emerged as a promising material for environmental and energy applications due to their exceptional photocatalytic properties. Initially recognized efficiency under ultraviolet (UV) light, recent advancements focused on enhancing ZnO’s visible light activity (VLA) address its inherent limitations. This review provides an overview of structure, electronic properties, mechanisms. Various strategies modifying ZnO harness including metal non-metal doping, dye sensitization, semiconductor coupling, are discussed. Special emphasis is placed the mechanisms behind absorption reactive oxygen species (ROS) generation, deduced through physicochemical photoelectrochemical analyses. The in remediation comprehensively explored, particularly water treatment, disinfection, air purification. degradation pollutants, persistent organic compounds, pharmaceuticals, dyes, pesticides, using reviewed compared with conventional UV-activated materials. underscores potential efficient sustainable solution

Language: Английский

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Construction of Honeycomb-like ZnO/g-C3N5 Heterojunction for MB Photocatalytic Degradation

Processes, Journal Year: 2025, Volume and Issue: 13(1), P. 253 - 253

Published: Jan. 16, 2025

In this study, a combination of calcination and hydrothermal methods was employed to synthesize honeycomb-like ZnO/g-C3N5 (ZCN) heterojunction in situ. The ZCN photocatalyst exhibits remarkable photocatalytic degradation performance, achieving 97% methyl blue (MB) rate with the constant 0.0433 min−1 (almost twice that ZnO). Optical performance tests reveal broadens absorption edge 710 nm enhances charge carrier separation. presence abundant oxygen vacancies, as revealed by X-ray photoelectron spectroscopy analysis, effectively suppresses recombination photogenerated electron–hole pairs. Furthermore, density functional theory simulations indicate ZnO g-C3N5 creates an internal electric field due their differing work functions. This leads formation Z-scheme preserves strong redox capabilities g-C3N5. Finally, electron spin resonance results O2− OH are primary active radicals involved process. study introduces potential approach for development highly efficient photocatalysts water treatment applications.

Language: Английский

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Starch-Assisted Eco-Friendly Synthesis of ZnO Nanoparticles: Enhanced Photocatalytic, Supercapacitive, and UV-Driven Antioxidant Properties with Low Cytotoxic Effects

International Journal of Molecular Sciences, Journal Year: 2025, Volume and Issue: 26(2), P. 859 - 859

Published: Jan. 20, 2025

This study presents an efficient and environmentally sustainable synthesis of ZnO nanoparticles using a starch-mediated sol-gel approach. method yields crystalline mesoporous NPs with hexagonal wurtzite structure. The synthesized demonstrated remarkable multifunctionality across three critical applications. In photocatalysis, the exhibited exceptional efficiency, achieving complete degradation methylene blue within 15 min at pH 11, significantly surpassing performance commercial ZnO. Under neutral conditions, effectively degraded various organic dyes, including blue, rhodamine B, methyl orange, following pseudo-first-order kinetics. process was aligned Langmuir–Hinshelwood model, emphasizing their advanced catalytic properties. For supercapacitor applications, attained high specific capacitance 550 F/g 1 A/g, underscoring potential as energy storage solutions. Additionally, strong UV-induced antiradical activity, EC50 32.2 μg/mL in DPPH assays. Notably, cytotoxicity evaluation revealed LC50 1648 μg/mL, indicating excellent biocompatibility. highlights approach for multifunctional that offers effective solutions environmental remediation, storage, biomedical

Language: Английский

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Facile green synthesis of Mn doped NiO nanoparticles using Vigna unguiculata seed for photocatalytic degradation of toluidine blue

International Journal of Environmental & Analytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 21

Published: April 10, 2025

Language: Английский

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Chitosan–Schiff Base Cu(II) Complex-Grafted ZnO Nanoparticles as a Photocatalyst for Degrading Pharmaceutical Pollutants Under Diverse Light Sources

Topics in Catalysis, Journal Year: 2025, Volume and Issue: unknown

Published: April 17, 2025

Language: Английский

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