Imperial College London
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Dr Jang Ah Kim

Faculty of Engineering, Department of Mechanical Engineering

Lecturer
 
 
 
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Contact

 

j.a.kim Website CV

 
 
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Location

 

B414ABessemer BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Qin:2014:10.1016/j.mseb.2014.01.014,
author = {Qin, H and Xu, Y and Kim, J and Hwang, T and Kim, T},
doi = {10.1016/j.mseb.2014.01.014},
journal = {Materials Science and Engineering: B},
pages = {72--79},
title = {The effect of structure on the photoactivity of a graphene/TiO<inf>2</inf> composite},
url = {http://dx.doi.org/10.1016/j.mseb.2014.01.014},
volume = {184},
year = {2014}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Graphene/TiO2 composites have been investigated as promising novel photoactive materials. Graphene can slow the recombination of electron-hole pairs and act as a strong electron-collector in the graphene/TiO2 composite system. We designed and prepared four different structures of graphene/TiO2 composite film by chemical vapor deposition (CVD) and aerosol technique. The structure of the graphene/TiO2 composite had a significant effect on the photoactive properties, including the photocurrent and resistance under UV illumination. For the different composite structures, the presence of oxygen and water molecules, as well as the photo-generated electron collection efficiency, were the key factors that affect the photoactive properties. More importantly, the composite structure was a decisive factor for the stability of photocurrent and resistance. The composite of reduced graphene oxide (RGO) and TiO2 with irregularly stacked structure had a higher and stable photoresponse. This study could provide a basis for the structural design of photoelectrical devices based on graphene/TiO2. © 2014 Elsevier B.V. All rights reserved.
AU  - Qin,H
AU  - Xu,Y
AU  - Kim,J
AU  - Hwang,T
AU  - Kim,T
DO  - 10.1016/j.mseb.2014.01.014
EP  - 79
PY  - 2014///
SN  - 0921-5107
SP  - 72
TI  - The effect of structure on the photoactivity of a graphene/TiO<inf>2</inf> composite
T2  - Materials Science and Engineering: B
UR  - http://dx.doi.org/10.1016/j.mseb.2014.01.014
VL  - 184
ER  -
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