Journal
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
Volume 401, Issue -, Pages 81-89Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molcata.2015.02.023
Keywords
AS/Ag2SO4/ZnO nanostructures; Visible-light; Degradation; Photocatalysis
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Funding
- National Natural Science Foundation of China [NSFC 21476084]
- National High Technology Research and Development Program of China [8632012AA0161601]
- Fundamental Research Funds for the Central Universities
- Specialized Research Fund for the Doctoral Program of Higher Education [SRFDP 20120074110008]
- Open Project of State Key Laboratory of Chemical Engineering [SKL-Che-12C05]
- 111 Project [B08021]
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Novel Ag/Ag2SO4/ZnO nanostructures were successfully fabricated by a facile microwave-assisted template-free hydrothermal method. The results reveal that Ag/Ag2SO4 nanoparticles are uniformly dispersed on the surfaces of ZnO plates, which forms the hierarchical Ag/Ag2SO4/ZnO (AZ) nanostructures. The AZ-2 photocatalyst obtained by adjusting the amounts of thiourea and AgNO3 with the molar ratio of 1:1 exhibits the highest photocatalytic efficiency, and rhodamine B can be decolorized within 35 min and 20 min under visible-light (lambda >420 nm) and natural sunlight irradiation, respectively. The enhanced photocatalytic performance of AZ catalysts may result from the synergistic effects of Ag/Ag2SO4 nanoparticles loaded on ZnO surfaces, which can enhance visible-light absorption capability of ZnO and promote photoinduced electron-hole separation. Therefore, the Ag/Ag2SO4 nanoparticles doped on semiconductors can be used as effective visible-light photocatalysts and show a great potential for practical applications in the treatment of dye-containing wastewater. (C) 2015 Elsevier B.V. All rights reserved.
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