Performance Enhancement of ZnO Photocatalyst via Synergic Effect of Surface Oxygen Defect and Graphene Hybridization

被引：473
作者：
Bai, Xiaojuan [1 ]
Wang, Li [1 ]
Zong, Ruilong [1 ]
Lv, Yanhui [1 ]
Sun, Yiqing [1 ]
Zhu, Yongfa [1 ]
机构：
[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
来源：
LANGMUIR | 2013年 / 29卷 / 09期
基金：
美国国家科学基金会; 国家高技术研究发展计划(863计划);
关键词：
COMPOSITE; TIO2; NANOCRYSTALS; DEGRADATION; STORAGE; OXIDE; NANOCOMPOSITES; DISPERSIONS; KINETICS; CARBON;
D O I：
10.1021/la4001768
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
ZnO1-x/graphene hybrid photocatalyst was prepared via a facile in-situ reduction of graphene oxide and ZnO1-x surface defect oxide. The hybrid photocatlayst showed enhanced photocatalytic activity for the photodegradation of methylene blue. The photocorrosion of ZnO1-x was successfully inhibited by graphene hybridation. ZnO1-x/graphene hybrid photocatalyst with 1.2 wt % graphene showed the optimized photocatalytic activity. The photocatalytic activity of ZnO1-x/graphene-1.2 wt % under visible and UV light was about 4.6 and 1.2 times that of ZnO1-x sample, respectively. The photocurrent intensity of ZnO1-x under visible and UV light irradiation can be enhanced by 2 and 3.5 times by graphene hybridization. The enhancement of photocatalytic activity and photocurrent intensity in ZnO1-x/graphene was attributed to the synergistic effect between graphene and ZnO1-x for high separation efficiency of photoinduced electron-hole pairs mainly resulting from the promotion of HOMO orbit of graphene and the O-i '' defect level of ZnO1-x in ZnO1-x/graphene.
引用
收藏
页码：3097 / 3105
页数：9
相关论文
共 54 条
  • [1] Graphene Nanomesh by ZnO Nanorod Photocatalysts
    Akhavan, Omid
    [J]. ACS NANO, 2010, 4 (07) : 4174 - 4180
  • [2] Photocatalytic decolorization of remazol red RR in aqueous ZnO suspensions
    Akyol, A
    Yatmaz, HC
    Bayramoglu, M
    [J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2004, 54 (01) : 19 - 24
  • [3] Honeycomb Carbon: A Review of Graphene
    Allen, Matthew J.
    Tung, Vincent C.
    Kaner, Richard B.
    [J]. CHEMICAL REVIEWS, 2010, 110 (01) : 132 - 145
  • [4] Optically pumped lasing of ZnO at room temperature
    Bagnall, DM
    Chen, YF
    Zhu, Z
    Yao, T
    Koyama, S
    Shen, MY
    Goto, T
    [J]. APPLIED PHYSICS LETTERS, 1997, 70 (17) : 2230 - 2232
  • [5] Defect-Mediated Energy Transfer between ZnO Nanocrystals and a Conjugated Dye
    Beane, Gary A.
    Morfa, Anthony J.
    Funston, Alison M.
    Mulvaney, Paul
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2012, 116 (05) : 3305 - 3310
  • [6] Electromechanical resonators from graphene sheets
    Bunch, J. Scott
    van der Zande, Arend M.
    Verbridge, Scott S.
    Frank, Ian W.
    Tanenbaum, David M.
    Parpia, Jeevak M.
    Craighead, Harold G.
    McEuen, Paul L.
    [J]. SCIENCE, 2007, 315 (5811) : 490 - 493
  • [7] Photocatalytic degradation of model textile dyes in wastewater using ZnO as semiconductor catalyst
    Chakrabarti, S
    Dutta, BK
    [J]. JOURNAL OF HAZARDOUS MATERIALS, 2004, 112 (03) : 269 - 278
  • [8] Graphene Oxide-MnO2 Nanocomposites for Supercapacitors
    Chen, Sheng
    Zhu, Junwu
    Wu, Xiaodong
    Han, Qiaofeng
    Wang, Xin
    [J]. ACS NANO, 2010, 4 (05) : 2822 - 2830
  • [9] Increasing Solar Absorption for Photocatalysis with Black Hydrogenated Titanium Dioxide Nanocrystals
    Chen, Xiaobo
    Liu, Lei
    Yu, Peter Y.
    Mao, Samuel S.
    [J]. SCIENCE, 2011, 331 (6018) : 746 - 750
  • [10] Energy Transfer from Individual Semiconductor Nanocrystals to Graphene
    Chen, Zheyuan
    Berciaud, Stephane
    Nuckolls, Colin
    Heinz, Tony F.
    Brus, Louis E.
    [J]. ACS NANO, 2010, 4 (05) : 2964 - 2968
123456