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Citation: LI Ping, ZHONG Shun-He. Structure and Photon Absorption Behavior of Photocatalyst Cu/Fe₂O₃-TiO₂[J]. Chinese Journal of Applied Chemistry, ;2006, 23(6): 586-590. shu

Structure and Photon Absorption Behavior of Photocatalyst Cu/Fe₂O₃-TiO₂

LI Ping ,
ZHONG Shun-He ^,

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

Corresponding author: ZHONG Shun-He,
Received Date: 27 July 2005
Available Online: 30 November 2005
Fund Project: 国家重大基础研究前期研究专项(2001CCA03600) (2001CCA03600)

Photocatalyst Cu/Fe₂O₃-TiO₂ was prepared with sol-gel method.The surface structure,photon absorption and photocatalysis properties of the solid materials were assessed by XRD,Raman,TPR,IR,TEM,UV-Vis DRS and photocatalytic reaction experiments,respectively.The results showed that Fe₂O₃ was dispersed on the surface of TiO₂ support as a monolayer at 10% content.Blue shift of the photon absorption edge of TiO₂ was observed after the addition of Fe₂O₃.When the amount of Fe₂O₃ exceeded 10%,crystalline Fe₂O₃ appeared and the photon absorption decreased.The formation of the Fe-O-Ti bond strengthened the interaction between the semiconductors and promoted the transfer of photoexcited electron-hole pairs.Metal Cu broadened the photon absorption edge of the coupled materials toward visible region.The photocatalysis activity of the materials was related with photon absorption property closely.In the photocatalysis of reaction between CO₂ and CH₂NH₂ to produce glycine directly,10% of Fe₂O₃ showed the best photocatalysis perfor-mance.Under the conditions of 120℃,normal pressure,space velocity 200 h^-1 ,n(CO₂):n(CH₃NH₂)=1:1 and UV light intensity 6.5×10^-4 W/cm²,the conversion of CH₃NH₂ was 1.35% and the selectivity to glycine reached 92.0%.
- coupled semiconductor,
- Cu/Fe₂O₃-TiO₂,
- photocatalyst,
- photon absorption property
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Structure and Photon Absorption Behavior of Photocatalyst Cu/Fe₂O₃-TiO₂