期刊
MATERIALS RESEARCH BULLETIN
卷 103, 期 -, 页码 225-233出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2018.03.015
关键词
Composites; Semiconductors; Chemical synthesis; Electron spectroscopy; Catalytic properties
资金
- National Natural Science Foundation of China [51402087, 31501680]
- Program for the Top Young Talents of Higher Learning Institutions of Hebei Province [BJ2014026]
In this paper, poplar leaf is used as a template to synthesize hierarchical AgCl-Ag-ZnO composites via a calcination method. Zn(NO3)(2) and AgNO3 are selected as precursors. During the calcination of the templates, Zn2+ ions react with oxygen to produce ZnO nanoparticles (NPs), Cl- ions in leaf cells combine with the external Ag+ ions to form AgCl, and Ag+ ions are reduced by reducing agents in leaf to Ag NPs. The morphology, structure and visible-light response of the as-prepared hierarchical AgCl-Ag-ZnO composites are determined. The composites exhibit a strong photocatalytic activity toward the degradation of Rhodamine B (RhB) under visible-light irradiation. The AgCl-Ag-ZnO composites display an enhanced photocatalytic activity, compared with the leaf-templated AgCl-Ag and ZnO. A photocatalytic mechanism is proposed, based on the efficient separation of photoexcited electron-hole pairs due to the surface plasmon resonance (SPR) effect of metal Ag.
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