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Title: Effects of cation concentration on photocatalytic performance over magnesium vanadates

Abstract

A series of magnesium vanadates (MgV {sub 2}O{sub 6}, Mg{sub 2}V {sub 2}O{sub 7}, and Mg{sub 3}V {sub 2}O{sub 8}) were synthesized to investigate the effect of cation concentration on photocatalytic performance. The samples were characterized by X-ray diffraction, field emission-scanning electron microscopy, UV-visible diffuse reflectance spectroscopy, and fluorescence spectroscopy. The photocatalytic O{sub 2} evolution experiments under visible light irradiation showed Mg{sub 2}V {sub 2}O{sub 7} exhibits the best performance, while Mg{sub 3}V {sub 2}O{sub 8} has the lowest activity. The density functional theory calculations indicated that the lowest unoccupied states of Mg{sub 3}V {sub 2}O{sub 8} are the mostly localized by the cation layers. The fluorescence spectra and fluorescence decay curves gave evident performances of excited states of magnesium vanadates and pointed out MgV {sub 2}O{sub 6} has a very short excited electron lift-time. Mg{sub 2}V {sub 2}O{sub 7} performs high photocatalytic activity because of its high electron mobility and long electron life-time.

Authors:
 [1];  [2]; ; ;  [3]; ;  [1];  [4];  [5];  [1];  [4];  [6]
  1. Catalytic Materials Group, Environmental Remediation Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
  2. Department of Physics, Tianjin University, 92 Weijin Road, Nankai District, Tianjin (China)
  3. TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin (China)
  4. (China)
  5. (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 (Japan)
  6. (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)
Publication Date:
OSTI Identifier:
22499263
Resource Type:
Journal Article
Journal Name:
APL Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2166-532X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CATIONS; CONCENTRATION RATIO; DENSITY FUNCTIONAL METHOD; ELECTRON MOBILITY; ELECTRONS; EXCITED STATES; FIELD EMISSION; FLUORESCENCE; FLUORESCENCE SPECTROSCOPY; IRRADIATION; MAGNESIUM; PHOTOCATALYSIS; SCANNING ELECTRON MICROSCOPY; VANADATES; X-RAY DIFFRACTION

Citation Formats

Li, Peng, Zhou, Wei, Wang, Xin, Zhang, Yan, Wang, Defa, Umezawa, Naoto, E-mail: UMEZAWA.Naoto@nims.go.jp, E-mail: ABE.Hideki@nims.go.jp, Abe, Hideki, E-mail: UMEZAWA.Naoto@nims.go.jp, E-mail: ABE.Hideki@nims.go.jp, TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, PRESTO, Japan Science and Technology Agency, Ye, Jinhua, TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, and International Center for Materials Nanoarchitectonics. Effects of cation concentration on photocatalytic performance over magnesium vanadates. United States: N. p., 2015. Web. doi:10.1063/1.4922833.
Li, Peng, Zhou, Wei, Wang, Xin, Zhang, Yan, Wang, Defa, Umezawa, Naoto, E-mail: UMEZAWA.Naoto@nims.go.jp, E-mail: ABE.Hideki@nims.go.jp, Abe, Hideki, E-mail: UMEZAWA.Naoto@nims.go.jp, E-mail: ABE.Hideki@nims.go.jp, TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, PRESTO, Japan Science and Technology Agency, Ye, Jinhua, TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, & International Center for Materials Nanoarchitectonics. Effects of cation concentration on photocatalytic performance over magnesium vanadates. United States. doi:10.1063/1.4922833.
Li, Peng, Zhou, Wei, Wang, Xin, Zhang, Yan, Wang, Defa, Umezawa, Naoto, E-mail: UMEZAWA.Naoto@nims.go.jp, E-mail: ABE.Hideki@nims.go.jp, Abe, Hideki, E-mail: UMEZAWA.Naoto@nims.go.jp, E-mail: ABE.Hideki@nims.go.jp, TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, PRESTO, Japan Science and Technology Agency, Ye, Jinhua, TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin, and International Center for Materials Nanoarchitectonics. Thu . "Effects of cation concentration on photocatalytic performance over magnesium vanadates". United States. doi:10.1063/1.4922833.
@article{osti_22499263,
title = {Effects of cation concentration on photocatalytic performance over magnesium vanadates},
author = {Li, Peng and Zhou, Wei and Wang, Xin and Zhang, Yan and Wang, Defa and Umezawa, Naoto, E-mail: UMEZAWA.Naoto@nims.go.jp, E-mail: ABE.Hideki@nims.go.jp and Abe, Hideki, E-mail: UMEZAWA.Naoto@nims.go.jp, E-mail: ABE.Hideki@nims.go.jp and TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin and PRESTO, Japan Science and Technology Agency and Ye, Jinhua and TU-NIMS Joint Research Center, School of Materials Science and Engineering, Tianjin University, 92 Weijin Road, Nankai District, Tianjin and International Center for Materials Nanoarchitectonics},
abstractNote = {A series of magnesium vanadates (MgV {sub 2}O{sub 6}, Mg{sub 2}V {sub 2}O{sub 7}, and Mg{sub 3}V {sub 2}O{sub 8}) were synthesized to investigate the effect of cation concentration on photocatalytic performance. The samples were characterized by X-ray diffraction, field emission-scanning electron microscopy, UV-visible diffuse reflectance spectroscopy, and fluorescence spectroscopy. The photocatalytic O{sub 2} evolution experiments under visible light irradiation showed Mg{sub 2}V {sub 2}O{sub 7} exhibits the best performance, while Mg{sub 3}V {sub 2}O{sub 8} has the lowest activity. The density functional theory calculations indicated that the lowest unoccupied states of Mg{sub 3}V {sub 2}O{sub 8} are the mostly localized by the cation layers. The fluorescence spectra and fluorescence decay curves gave evident performances of excited states of magnesium vanadates and pointed out MgV {sub 2}O{sub 6} has a very short excited electron lift-time. Mg{sub 2}V {sub 2}O{sub 7} performs high photocatalytic activity because of its high electron mobility and long electron life-time.},
doi = {10.1063/1.4922833},
journal = {APL Materials},
issn = {2166-532X},
number = 10,
volume = 3,
place = {United States},
year = {2015},
month = {10}
}