Construction of ZnO/CdS Z‐Scheme Heterojunction and Enhanced Photocatalytic Performance

physica status solidi (a), Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Semiconductor photocatalysts have been widely used to remove pollutants from industrial wastewater. Organic and heavy metal ions often coexist in polluted environments. However, the studies on water pollution only focused treatment of single organic or ions. Herein, a ZnO/CdS composite is synthesized using simple hydrothermal method. The hybrid shows excellent photocatalytic performance for simultaneous removal rhodamine B (RhB) dye hexavalent chromium (Cr(VI)) complex contaminants under visible‐light irradiation. Photocatalytic efficiencies 98.93% RhB degradation 94.59% Cr(VI) reduction are achieved after 120 min exhibits superior activity compared with pristine ZnO CdS. Z‐scheme heterojunction formed between CdS promotes separation transfer photogenerated carriers, thus enhancing composite. Reusability stability investigations demonstrate >90% 3rd cycle, suggesting chemical potential practical applications. According radical trapping experiment, decomposed by co‐oxidation h + •O 2 − . Meanwhile, K Cr O 7 reduced Cr(III) e

Language: Английский

Graphite-like C3N4 and Graphene Oxide Co-Enhanced the Photocatalytic Activity of ZnO Under Natural Sunlight

C – Journal of Carbon Research, Journal Year: 2025, Volume and Issue: 11(2), P. 33 - 33

Published: May 6, 2025

To enhance the photocatalytic performance of ZnO, ZnO/g-C3N4 (ZCN) composite was prepared by ZnO and g-C3N4 under ball milling, then ternary graphene oxide (GO)/ZnO/g-C3N4 (GZCN) achieved using sonicating, stirring, liquid phase evaporating. The tested UV light natural solar light, respectively. experimental results displayed that GZCN revealed excellent sunlight. When ratio to is 1:0.2 mass fraction 0.25% in composite, modified possesses optimal activity or light. RhB dye degraded 94% within 20 min which 3.41 times pure ZnO. Moreover, can degrade 88% 60 enhancement for attributed conductivity GO heterojunction interaction between g-C3N4, where special electronic structure expands spectral response range accelerates transmission photogenerated electrons holes.

Language: Английский

Effective removal of atrazine pesticide residue from wastewater using transition metal-doped zinc oxide photocatalyst

Journal of Environmental Science and Health Part B, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 9

Published: Dec. 15, 2024

Frequent use of pesticides results in the release large quantities their residues environment, raising various concerns for humans and ecosystem. This work introduces a simple cost-effective method removal atrazine pesticide residue (APR) from agricultural wastewater using Cu doped-ZnO photocatalyst (Cu-ZnO). The modification ZnO with significantly improved its optical photoelectrochemical properties, band gap narrowing 3.3 to 2.64 eV. photodegradation APR was 93.6 91.7% aqueous solution wastewater, respectively. After being reused four times, Cu-ZnO did not display notable drop degradation performance, rates 93.6, 91.2, 86.8, 83.1% during first, second, third, fourth recycles, Also, after six cycles <2%, suggesting excellent stability modified without any issues related secondary pollution. Under natural sunlight, 83.9% removed, confirming benefit reducing treatment costs by utilizing renewable energy. In addition, mechanism proposed based on outcomes radical quenching TOC tests.

Language: Английский