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Acta Phys. Chim. Sin.  2014, Vol. 30 Issue (10): 1957-1962    DOI: 10.3866/PKU.WHXB201408041
PHYSICAL CHEMISTRY OF MATERIALS     
Synthesis and Interfacial Electron Transfer of a Composite Film of Graphene and Tungsten Oxide
LI Wen-Zhang2, LIU Yang2, LI Jie2, YANG Ya-Hui1, CHEN Qi-Yuan2
1. College of Resources and Environment, Hunan Agricultural University, Changsha 410128, P. R. China;
2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, P. R. China
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Abstract  

Composite films of graphene and tungsten oxide were fabricated by dip-coating with ammonium metatungstate as the precursor and polyvinylpyrrolidone as the bridging agent. The as-prepared composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Raman spectroscopy. Photocurrent test, electrochemical impedance spectroscopy (EIS), transient photocurrent spectroscopy,and intensity-modulated photocurrent spectroscopy were used to study the transfer process and transport behavior of the charge carriers at the interface of the film electrodes. The results showed that the tungsten oxide nanoparticles were sufficiently composited with graphene. The efficiency of photoelectric conversion improved significantly. The transient constant and the electron-hole lifetime increased after the incorporation of graphene. The electron transit time of the composite film was reduced and was found to be only 47.5% of that of the tungsten oxide film.



Key wordsTungsten oxide      Graphene      Composite film      Photoelectrochemistry      Interfacial electron transfer     
Received: 15 May 2014      Published: 04 August 2014
MSC2000:  O644  
  O646  
Fund:  

The project was supported by the National High Technology Research and Development Program of China (863) (2011AA050528), National Natural Science Foundation of China (21171175), and Hunan Provincial Natural Science Foundation, China (13JJ6003).

Corresponding Authors: YANG Ya-Hui     E-mail: Yangyahui2002@sina.com
Cite this article:

LI Wen-Zhang, LIU Yang, LI Jie, YANG Ya-Hui, CHEN Qi-Yuan. Synthesis and Interfacial Electron Transfer of a Composite Film of Graphene and Tungsten Oxide. Acta Phys. Chim. Sin., 2014, 30(10): 1957-1962.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB201408041     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2014/V30/I10/1957

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