Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 524, Issue -, Pages 16-24Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.04.001
Keywords
Ag-Ag3VO4/AgIO3; Visible-light-driven; Photocatalysis; Dyes; Tetracycline hydrochloride
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Funding
- National Natural Science Foundation of China [21477022]
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Ag-Ag3VO4/AgIO3 composites composed of Ag-Ag3VO4 particles (major component) and AgIO3 nanosheets (minor component) were obtained via photoreduction of Ag3VO4/AgIO3 composites prepared by sequential precipitation. The optimal Ag-Ag3VO4/AgIO3 catalysts (in particular, the one with an AgIO3/Ag3VO4 mass ratio of 6.4%) were found to be more active than AgIO3, Ag3VO4, and Ag-Ag3VO4 in the photocatalytic degradation of rhodamine B (RhB), methylene blue (MB), methyl orange (MO), and tetracycline hydrochloride (TC) under visible-light irradiation. Ag-Ag3VO4/AgIO3 can be reused in cycling experiments. Photogenerated holes (h(+)) and superoxide radical anions (center dot O-2(-)) were demonstrated by radical-capture experiments as the main active species in the photocatalytic degradation of RhB. The more efficient separation and transfer of photogenerated electron-hole pairs are responsible for the enhanced activity of Ag-Ag3VO4/AgIO3. A possible photocatalytic mechanism is proposed. (C) 2018 Elsevier Inc. All rights reserved.
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