Tags

Type your tag names separated by a space and hit enter

Degradation of refractory pollutants under solar light irradiation by a robust and self-protected ZnO/CdS/TiO2 hybrid photocatalyst.
Water Res. 2016 Apr 01; 92:78-86.WR

Abstract

Photocatalyst plays a vital role in the photochemical water treatment. To improve the visible-light photoactivity of TiO2 for refractory pollutant degradation, CdS/TiO2 hybrids with different nanostructures have been prepared, but usually suffer from a low photocatalytic degradation efficiency and a rapid photocorrosion. In this work, we developed a synergistic ZnO/CdS/TiO2 hybrid, which could act as a robust and self-protected photocatalyst for water purification without additional sacrificial reagents. This was attributed to the two different junction mechanisms in one single hybrid. Photons were selectively adsorbed by ZnO and CdS, then, the electrons with a low reductive activity in ZnO recombined directly with the holes with a low oxidative activity in CdS, whereas the holes with a high oxidative activity in ZnO and the electrons with a high reductive activity in CdS were captured for catalytic reaction. The superiority of the novel ZnO/CdS/TiO2 hybrid over the traditional CdS/TiO2 hybrid in both photocatalytic activity and anti-photocorrosion capacity was demonstrated in the degradation of Atrazine and Rhodamine B, two typical refractory organic pollutants, and the treatment of real textile wastewater under solar light irradiation. The developed ZnO/CdS/TiO2 hybrid exhibited an excellent potential for the degradation of refractory pollutants, and provided a new way to advance intrinsically solar-susceptible catalyst for photochemical wastewater treatment.

Authors+Show Affiliations

CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei, 230026, China; Department of Municipal Engineering, Hefei University of Technology, Hefei, 230009, China.CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei, 230026, China.CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei, 230026, China.CAS Key Laboratory of Urban Pollutant Conversion, Department of Chemistry, University of Science & Technology of China, Hefei, 230026, China. Electronic address: hqyu@ustc.edu.cn.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26841231

Citation

Zhang, Ai-Yong, et al. "Degradation of Refractory Pollutants Under Solar Light Irradiation By a Robust and Self-protected ZnO/CdS/TiO2 Hybrid Photocatalyst." Water Research, vol. 92, 2016, pp. 78-86.
Zhang AY, Wang WK, Pei DN, et al. Degradation of refractory pollutants under solar light irradiation by a robust and self-protected ZnO/CdS/TiO2 hybrid photocatalyst. Water Res. 2016;92:78-86.
Zhang, A. Y., Wang, W. K., Pei, D. N., & Yu, H. Q. (2016). Degradation of refractory pollutants under solar light irradiation by a robust and self-protected ZnO/CdS/TiO2 hybrid photocatalyst. Water Research, 92, 78-86. https://doi.org/10.1016/j.watres.2016.01.045
Zhang AY, et al. Degradation of Refractory Pollutants Under Solar Light Irradiation By a Robust and Self-protected ZnO/CdS/TiO2 Hybrid Photocatalyst. Water Res. 2016 Apr 1;92:78-86. PubMed PMID: 26841231.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation of refractory pollutants under solar light irradiation by a robust and self-protected ZnO/CdS/TiO2 hybrid photocatalyst. AU - Zhang,Ai-Yong, AU - Wang,Wei-Kang, AU - Pei,Dan-Ni, AU - Yu,Han-Qing, Y1 - 2016/01/22/ PY - 2015/09/24/received PY - 2016/01/15/revised PY - 2016/01/20/accepted PY - 2016/2/4/entrez PY - 2016/2/4/pubmed PY - 2016/12/15/medline KW - Anti-photocorrosion KW - Atrazine KW - Catalytic performance KW - CdS KW - Photochemical wastewater treatment SP - 78 EP - 86 JF - Water research JO - Water Res VL - 92 N2 - Photocatalyst plays a vital role in the photochemical water treatment. To improve the visible-light photoactivity of TiO2 for refractory pollutant degradation, CdS/TiO2 hybrids with different nanostructures have been prepared, but usually suffer from a low photocatalytic degradation efficiency and a rapid photocorrosion. In this work, we developed a synergistic ZnO/CdS/TiO2 hybrid, which could act as a robust and self-protected photocatalyst for water purification without additional sacrificial reagents. This was attributed to the two different junction mechanisms in one single hybrid. Photons were selectively adsorbed by ZnO and CdS, then, the electrons with a low reductive activity in ZnO recombined directly with the holes with a low oxidative activity in CdS, whereas the holes with a high oxidative activity in ZnO and the electrons with a high reductive activity in CdS were captured for catalytic reaction. The superiority of the novel ZnO/CdS/TiO2 hybrid over the traditional CdS/TiO2 hybrid in both photocatalytic activity and anti-photocorrosion capacity was demonstrated in the degradation of Atrazine and Rhodamine B, two typical refractory organic pollutants, and the treatment of real textile wastewater under solar light irradiation. The developed ZnO/CdS/TiO2 hybrid exhibited an excellent potential for the degradation of refractory pollutants, and provided a new way to advance intrinsically solar-susceptible catalyst for photochemical wastewater treatment. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/26841231/Degradation_of_refractory_pollutants_under_solar_light_irradiation_by_a_robust_and_self_protected_ZnO/CdS/TiO2_hybrid_photocatalyst_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(16)30044-6 DB - PRIME DP - Unbound Medicine ER -