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Journal of Zhejiang University SCIENCE A 2004 Vol.5 No.12 P.1548-1553


Synthesis of TiO2 supported on activated carbon by MOCVD: operation parameters study

Author(s):  ZHANG Xing-wang, ZHOU Ming-hua, LEI Le-cheng, XU Su

Affiliation(s):  Institute of Environmental Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   lclei@zju.edu.cn

Key Words:  MOCVD, Supported materials, Supersaturation, Titanium dioxide

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ZHANG Xing-wang, ZHOU Ming-hua, LEI Le-cheng, XU Su. Synthesis of TiO2 supported on activated carbon by MOCVD: operation parameters study[J]. Journal of Zhejiang University Science A, 2004, 5(12): 1548-1553.

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publisher="Zhejiang University Press & Springer",

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%A ZHANG Xing-wang
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%A LEI Le-cheng
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2004.1548

T1 - Synthesis of TiO2 supported on activated carbon by MOCVD: operation parameters study
A1 - ZHANG Xing-wang
A1 - ZHOU Ming-hua
A1 - LEI Le-cheng
A1 - XU Su
J0 - Journal of Zhejiang University Science A
VL - 5
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SP - 1548
EP - 1553
%@ 1869-1951
Y1 - 2004
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2004.1548

The metallo-organic chemical vapor deposition (MOCVD) technique has been applied to the preparation of the photocatalyst titanium dioxide supported on activated carbon. The effects of various condition parameters such as carrier gas flow rate, source temperature and deposition temperature on the deposition rate were investigated. The maximum deposition rate of 8.2 mg/(g·h) was obtained under conditions of carrier gas flow rate of 400 ml/min, source temperature of 423 K and deposition temperature of 913 K. The deposition rate followed Arrhenius behavior at temperature of 753 K to 913 K, corresponding to activation energy Ea of 51.09 kJ/mol. TiO2 existed only in anatase phase when the deposition temperature was 773 K to 973 K. With increase of deposition temperature from 1073 K to 1273 K, the rutile content sharply increased from 7% to 70%. It was found that a deposition temperature of 773 K and a higher source temperature of 448 K resulted in finely dispersed TiO2 particles, which were mainly in the range of 10~20 nm.

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