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Citation: ZHAO Chun, ZHONG Shun-He. A ZnO-TiO₂ Photocatalyst for Synthesis of Crylic Acid from CO₂ and Ethene[J]. Chinese Journal of Applied Chemistry, ;2005, 22(4): 349-354. shu

A ZnO-TiO₂ Photocatalyst for Synthesis of Crylic Acid from CO₂ and Ethene

ZHAO Chun ,
ZHONG Shun-He ^,

1.
College of Chemical Engineering and Technology, Tianjin University, Tianjin 300072

Corresponding author: ZHONG Shun-He,
Received Date: 8 July 2004
Available Online: 19 October 2004
Fund Project: 国家重大基础研究前期专项(2001CCA03600)资助项目 (2001CCA03600)

Coupled semiconductor ZnO-TiO₂ was prepared by the sol-gel method,and its crystal structure,surface composition,chemisorption properties,absorptivity of ultraviolet and visible light,and photocatalytic behavior were investigated by virtue of thermal analysis (DTA-TG),X-ray diffraction (XRD),transmission electron microscopy (TEM),BET surface area (BET),temperature programmed reduction (TPR),infrared spectrometry (IR),UV-Visible diffuse reflectance spectrometry (UV-Vis),and photo stimulated surface catalytic reaction.The results show that the main crystal structure of the coupled-semiconductor was anatase TiO₂ with the particle size in the range of 10~20 nm,and the BET surface area was about 72.5 m²/g.In the sol-gel process,Zn²⁺ cations take the places of the O-tetrahedral and O-octahedral centers to form Zn₂ TiO₄,and the coupling effects enhance the absorptivity of the semiconductor in the wavelength region of 250~400 nm.Acrylic acid was successfully synthesized from CO₂ and C₂H₄ with a selectivity of above 70% under the photoreaction conditions of 0.1 MPa and 100℃.
- coupled solid material Zn0-Ti0₂,
- photocatalyst,
- photo reduction of carbon dioxide,
- photo absorption property
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A ZnO-TiO2 Photocatalyst for Synthesis of Crylic Acid from CO2 and Ethene

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通讯作者: 陈斌, bchen63@163.com

A ZnO-TiO₂ Photocatalyst for Synthesis of Crylic Acid from CO₂ and Ethene