Novel high-efficiency visible-light responsive Ag4(GeO4) photocatalyst

Zhu, Xianglin; Wang, Peng; Li, Mengmeng; Zhang, Qianqian; Rozhkova, Elena A.; Qin, Xiaoyan; Zhang, Xiaoyang; Dai, Ying; Wang, Zeyan; Huang, Baibiao

doi:10.1039/c7cy00393e

Title: Novel high-efficiency visible-light responsive Ag₄(GeO₄) photocatalyst

Journal Article · Tue Apr 25 00:00:00 EDT 2017 · Catalysis Science and Technology

DOI:https://doi.org/10.1039/c7cy00393e· OSTI ID:1361642

Zhu, Xianglin; Wang, Peng; Li, Mengmeng; Zhang, Qianqian; Rozhkova, Elena A.; Qin, Xiaoyan; Zhang, Xiaoyang; Dai, Ying; Wang, Zeyan; Huang, Baibiao

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.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Basic Research Program of China; National Natural Science Foundation of China (NSFC)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1361642

Journal Information:: Catalysis Science and Technology, Vol. 7, Issue 11; ISSN 2044-4753

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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Title: Novel high-efficiency visible-light responsive Ag₄(GeO₄) photocatalyst