The exceptional photo-catalytic activity of ZnO/RGO composite via metal and oxygen vacancies

被引：69

作者：

Chen, Ting-Ting ^{[1
]}

Chang, I-Chun ^{[1
]}

Yang, Min-Han ^{[1
]}

Chiu, Hsin-Tien ^{[2
]}

Lee, Chi-Young ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, 101,Sec 2,Kuang Fu Rd, Hsinchu 30013, Taiwan

[2] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 30010, Taiwan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2013年 / 142卷

关键词：

Photocatalysis; Defect; Heterojunction; Graphene; ZnO; LIGHT PHOTOCATALYTIC ACTIVITY; ELECTRON-SPIN-RESONANCE; GRAPHENE OXIDE; ZNO NANOCRYSTALS; GREEN PHOTOLUMINESCENCE; TIO2-GRAPHENE NANOCOMPOSITES; TIO2; MICROSPHERES; HIGHLY EFFICIENT; DEFECTS; NANOPARTICLES;

D O I：

10.1016/j.apcatb.2013.05.059

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

ZnO/reduced graphene oxide (RGO) nanocomposite with many zinc and oxygen vacancies, synthesized in a simple solvothermal reaction exhibits significant photocatalytic activity. Photoluminescence and electron paramagnetic resonance measurements indicate that the zinc vacancies and oxygen vacancies were generated on the ZnO surface, and were crucial to that photocatalytic behavior. The photodegradation of methylene orange was significantly reduced by the addition of h(+) and (OH)-O-center dot scavengers. Both zinc and oxygen vacancies cause effective charge separation in the photodegradation of methylene orange, which markedly inhibits the recombination of charges. The advanced photocatalytic behavior of the ZnO/RGO composite is discussed in detail herein. (c) 2013 Elsevier B.V. All rights reserved.

引用

页码：442 / 449

页数：8

共 77 条

[1] Graphene Nanomesh by ZnO Nanorod Photocatalysts [J].

Akhavan, Omid .

ACS NANO, 2010, 4 (07) :4174-4180

[2] Photoreactivity of ZnO nanoparticles in visible light: Effect of surface states on electron transfer reaction [J].

Baruah, Sunandan ;

Sinha, Sudarson Sekhar ;

Ghosh, Barnali ;

Pal, Samir Kumar ;

Raychaudhuri, A. K. ;

Dutta, Joydeep .

JOURNAL OF APPLIED PHYSICS, 2009, 105 (07)

[3] Understanding the Enhancement in Photoelectrochemical Properties of Photocatalytically Prepared TiO2-Reduced Graphene Oxide Composite [J].

Bell, Nicholas J. ;

Ng, Yun Hau ;

Du, Aijun ;

Coster, Hans ;

Smith, Sean C. ;

Amal, Rose .

JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (13) :6004-6009

[4] Role of nanoparticles in photocatalysis [J].

Beydoun, D. ;

Amal, R. ;

Low, G. ;

McEvoy, S. .

JOURNAL OF NANOPARTICLE RESEARCH, 1999, 1 (04) :439-458

[5] Cationic and Anionic Surface Binding Sites on Nanocrystalline Zinc Oxide: Surface Influence on Photoluminescence and Photocatalysis [J].

Bohle, D. Scott ;

Spina, Carla J. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (12) :4397-4404

[6] The electronic properties of graphene [J].

Castro Neto, A. H. ;

Guinea, F. ;

Peres, N. M. R. ;

Novoselov, K. S. ;

Geim, A. K. .

REVIEWS OF MODERN PHYSICS, 2009, 81 (01) :109-162

[7] Incorporation of graphene in quantum dot sensitized solar cells based on ZnO nanorods [J].

Chen, Jing ;

Li, Chu ;

Eda, Goki ;

Zhang, Yan ;

Lei, Wei ;

Chhowalla, Manish ;

Milne, William I. ;

Deng, Wei-Qiao .

CHEMICAL COMMUNICATIONS, 2011, 47 (21) :6084-6086

[8] X-ray photoelectron spectroscopy and auger electron spectroscopy studies of Al-doped ZnO films [J].

Chen, M ;

Wang, X ;

Yu, YH ;

Pei, ZL ;

Bai, XD ;

Sun, C ;

Huang, RF ;

Wen, LS .

APPLIED SURFACE SCIENCE, 2000, 158 (1-2) :134-140

[9] Tuning the Potentials of "Extra" Electrons in Colloidal n-Type ZnO Nanocrystals via Mg2+ Substitution [J].

Cohn, Alicia W. ;

Kittilstved, Kevin R. ;

Gamelin, Daniel R. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2012, 134 (18) :7937-7943

[10] Photoluminescence and electron paramagnetic resonance of ZnO tetrapod structure [J].

Djurisic, AB ;

Choy, WCH ;

Roy, VAL ;

Leung, YH ;

Kwong, CY ;

Cheah, KW ;

Rao, TKG ;

Chan, WK ;

Lui, HT ;

Surya, C .

ADVANCED FUNCTIONAL MATERIALS, 2004, 14 (09) :856-864

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