Ag2O/Ag3VO4/Ag4V2O7 heterogeneous photocatalyst prepared by a facile hydrothermal synthesis with enhanced photocatalytic performance under visible light irradiation

被引：37
作者：
Ran, Rong [1 ,2 ]
McEvoy, Joanne Gamage [1 ,2 ]
Zhang, Zisheng [1 ,2 ]
机构：
[1] Univ Ottawa, Dept Chem & Biol Engn, Ottawa, ON K1N 6N5, Canada
[2] Univ Ottawa, Ctr Catalysis Res & Innovat, Ottawa, ON K1N 6N5, Canada
来源：
MATERIALS RESEARCH BULLETIN | 2016年 / 74卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Semiconductors; Solvothermal; Chemical synthesis; Catalytic properties; Optical properties; PLASMONIC PHOTOCATALYST; RHODAMINE-B; SILVER VANADATES; HIGHLY EFFICIENT; DEGRADATION; DYE; PHOTOACTIVITY; MICROCRYSTALS; COMPOSITES; POLLUTANTS;
D O I：
10.1016/j.materresbull.2015.08.028
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel Ag2O/Ag3VO4/Ag4V2O7 photocatalyst was synthesized by adjusting the molar ratio of silver-vanadium (Ag-V) in a facile hydrothermal method to obtain multi-phase Ag2O/Ag3O4/Ag4V2O7 photocatalyst. The photocatalytic activity of the prepared samples was quantified by the degradation of Rhodamine B (RhB) model organic pollutant under visible light irradiation. Compared to pure Ag3VO4, Ag4V2O7 and P25 TiO2, respectively, the as-synthesized multi-phase Ag2O/Ag3VO4/Ag4V2O7 powders gave rise to a significantly higher photocatalytic activity, achieving up to 99% degradation of RhB in 2 h under visible light. This enhanced photocatalytic performance was attributed to the effect of the multiphase Ag2O/Ag3VO4/Ag4V2O7 photocatalyst and the surface plasmon resonance (SPR) of the incorporated metallic silver (Ag-0) nanoparticles (NPs) generated during the photocatalysis, as evidenced by post-use characterization, resulting in improved visible light absorption and electron-hole (e(-)-h(+)) separation. A mechanism was proposed for the photocatalytic degradation of RhB on the surface of Ag2O/Ag3VO4/Ag4V2O7. (C) 2015 Published by Elsevier Ltd.
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收藏
页码：140 / 150
页数：11
相关论文
共 56 条
[1]   Photocatalytic behavior of silver vanadates: Microemulsion synthesis and post-reaction characterization [J].
Belver, Carolina ;
Adan, Cristina ;
Garcia-Rodriguez, Sergio ;
Fernandez-Garcia, Marcos .
CHEMICAL ENGINEERING JOURNAL, 2013, 224 :24-31
[2]   Photocatalytic and photoelectric properties of cubic Ag3PO4 sub-microcrystals with sharp corners and edges [J].
Bi, Yingpu ;
Hu, Hongyan ;
Ouyang, Shuxin ;
Lu, Gongxuan ;
Cao, Junyu ;
Ye, Jinhua .
CHEMICAL COMMUNICATIONS, 2012, 48 (31) :3748-3750
[3]   Effect of the sequence of potassium introduction to V2O5/TiO2 catalysts on their physicochemical properties and catalytic performance in oxidative dehydrogenation of propane [J].
Courcot, D ;
Ponchel, A ;
Grzybowska, B ;
Barbaux, Y ;
Rigole, M ;
Guelton, M ;
Bonnelle, JP .
CATALYSIS TODAY, 1997, 33 (1-3) :109-118
[4]   A New Approach for Photocorrosion In Inhibition of Ag2CO3 Photocatalyst with Highly Visible-Light-Responsive Reactivity [J].
Dai, Gaopeng ;
Yu, Jiaguo ;
Liu, Gang .
JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (29) :15519-15524
[5]   Synthesis of graphene oxide-Ag2CO3 composites with improved photoactivity and anti-photocorrosion [J].
Dong, Chao ;
Wu, Kong-Lin ;
Wei, Xian-Wen ;
Li, Xiang-Zi ;
Liu, Li ;
Ding, Ting-Hui ;
Wang, Jing ;
Ye, Yin .
CRYSTENGCOMM, 2014, 16 (04) :730-736
[6]   Photocatalytic degradation of rhodamine B by Bi2WO6 with electron accepting agent under microwave irradiation: Mechanism and pathway [J].
He, Zhong ;
Sun, Cheng ;
Yang, Shaogui ;
Ding, Youchao ;
He, Huan ;
Wang, Zhiliang .
JOURNAL OF HAZARDOUS MATERIALS, 2009, 162 (2-3) :1477-1486
[7]   Environmental remediation by an integrated microwave/UV-illumination method.: 1.: Microwave-assisted degradation of rhodamine-B dye in aqueous TiO2 dispersions [J].
Horikoshi, S ;
Hidaka, H ;
Serpone, N .
ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2002, 36 (06) :1357-1366
[8]   Preparation and visible-light photocatalytic activity of Ag3VO4 powders [J].
Hu, Xuexiang ;
Hu, Chun .
JOURNAL OF SOLID STATE CHEMISTRY, 2007, 180 (02) :725-732
[9]   CTAB-assisted hydrothermal synthesis of silver vanadates and their photocatalytic characterization [J].
Huang, Chao-Ming ;
Cheng, Kong-Wei ;
Pan, Guan-Ting ;
Chang, Wen-Sheng ;
Yang, Thomas C. -K. .
CHEMICAL ENGINEERING SCIENCE, 2010, 65 (01) :148-152
[10]   Crystalline phases and photocatalytic activities of hydrothermal synthesis Ag3VO4 and Ag4V2O7 under visible light irradiation [J].
Huang, Chao-Ming ;
Pan, Guan-Ting ;
Li, Yu-Chu M. ;
Li, Min-Hsing ;
Yang, Thomas C. -K. .
APPLIED CATALYSIS A-GENERAL, 2009, 358 (02) :164-172
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