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Title: Novel high-efficiency visible-light responsive Ag 4(GeO 4) photocatalyst

Abstract

A novel high-efficiency visible-light responsive Ag 4(GeO 4) photocatalyst was prepared by a facile hydrothermal method. The photocatalytic activity of as-prepared Ag 4(GeO 4) was evaluated by photodegradation of methylene blue (MB) dye and water splitting experiments. The photodegradation efficiency and oxygen production efficiency of Ag 4(GeO 4) were detected to be 2.9 and 1.9 times higher than those of Ag 2O. UVvis diffuse reflectance spectroscopy (DRS), photoluminescence experiment and photoelectric effect experiments prove that the good light response and high carrier separation efficiency facilitated by the internal electric field are the main reasons for Ag 4(GeO 4)'s excellent catalytic activity. Radical-trapping experiments reveal that the photogenerated holes are the main active species. Lastly, first-principles theoretical calculations provide more insight into understanding the photocatalytic mechanism of the Ag 4(GeO 4) catalyst.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Basic Research Program of China; National Natural Science Foundation of China (NNSFC)
OSTI Identifier:
1361642
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Catalysis Science and Technology
Additional Journal Information:
Journal Volume: 7; Journal Issue: 11; Journal ID: ISSN 2044-4753
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Zhu, Xianglin, Wang, Peng, Li, Mengmeng, Zhang, Qianqian, Rozhkova, Elena A., Qin, Xiaoyan, Zhang, Xiaoyang, Dai, Ying, Wang, Zeyan, and Huang, Baibiao. Novel high-efficiency visible-light responsive Ag4(GeO4) photocatalyst. United States: N. p., 2017. Web. doi:10.1039/c7cy00393e.
Zhu, Xianglin, Wang, Peng, Li, Mengmeng, Zhang, Qianqian, Rozhkova, Elena A., Qin, Xiaoyan, Zhang, Xiaoyang, Dai, Ying, Wang, Zeyan, & Huang, Baibiao. Novel high-efficiency visible-light responsive Ag4(GeO4) photocatalyst. United States. doi:10.1039/c7cy00393e.
Zhu, Xianglin, Wang, Peng, Li, Mengmeng, Zhang, Qianqian, Rozhkova, Elena A., Qin, Xiaoyan, Zhang, Xiaoyang, Dai, Ying, Wang, Zeyan, and Huang, Baibiao. Tue . "Novel high-efficiency visible-light responsive Ag4(GeO4) photocatalyst". United States. doi:10.1039/c7cy00393e. https://www.osti.gov/servlets/purl/1361642.
@article{osti_1361642,
title = {Novel high-efficiency visible-light responsive Ag4(GeO4) photocatalyst},
author = {Zhu, Xianglin and Wang, Peng and Li, Mengmeng and Zhang, Qianqian and Rozhkova, Elena A. and Qin, Xiaoyan and Zhang, Xiaoyang and Dai, Ying and Wang, Zeyan and Huang, Baibiao},
abstractNote = {A novel high-efficiency visible-light responsive Ag4(GeO4) photocatalyst was prepared by a facile hydrothermal method. The photocatalytic activity of as-prepared Ag4(GeO4) was evaluated by photodegradation of methylene blue (MB) dye and water splitting experiments. The photodegradation efficiency and oxygen production efficiency of Ag4(GeO4) were detected to be 2.9 and 1.9 times higher than those of Ag2O. UVvis diffuse reflectance spectroscopy (DRS), photoluminescence experiment and photoelectric effect experiments prove that the good light response and high carrier separation efficiency facilitated by the internal electric field are the main reasons for Ag4(GeO4)'s excellent catalytic activity. Radical-trapping experiments reveal that the photogenerated holes are the main active species. Lastly, first-principles theoretical calculations provide more insight into understanding the photocatalytic mechanism of the Ag4(GeO4) catalyst.},
doi = {10.1039/c7cy00393e},
journal = {Catalysis Science and Technology},
number = 11,
volume = 7,
place = {United States},
year = {Tue Apr 25 00:00:00 EDT 2017},
month = {Tue Apr 25 00:00:00 EDT 2017}
}

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Works referenced in this record:

Electrochemical Photolysis of Water at a Semiconductor Electrode
journal, July 1972

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