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Citation: CHEN Yu-Juan, HU Zhong-Hua, WANG Xiao-Jing, ZHAO Guo-Hua, LIU Ya-Fei, LIU Wei. Influence of Pore Size and Surface Area of Activated Carbon on the Performance of TiO₂/AC Photocatalyst[J]. Acta Physico-Chimica Sinica, ;2008, 24(09): 1589-1596. doi: 10.3866/PKU.WHXB20080911 shu

Influence of Pore Size and Surface Area of Activated Carbon on the Performance of TiO₂/AC Photocatalyst

1.
Department of Chemistry, Tongji University, Shanghai 200092, P. R. China

Received Date: 12 May 2008
Available Online: 22 July 2008

Commercial activated carbon (AC) was post-activated by means of simultaneous physical-chemical activation in order to produce porous carbon supports with different pore sizes and surface areas. Photocatalysts of AC-supported TiO2 were prepared by well-dispersed deposition using inorganic species of H2TiO3 as Ti source. Nitrogen adsorption, XRD, and SEM were used to characterize ACs and TiO2/ACs and to investigate the influence of AC surface area and pore size on the resultant catalysts. The photocatalytic performance of TiO2/AC catalysts was studied by degradation of methylene blue (MB) in aqueous solution. The influence of catalyst dosage and MB concentration on the degradation was investigated. The results showed that nano-TiO2 deposit was formed in the particle size of 12-20 nm. The larger the AC surface area and average pore size, the smaller the TiO2 particle formed on the carbon surface. It was found that TiO2/AC catalysts had a synergetic effect of AC adsorption and TiO2 photocatalysis on the degradation of MB, so that the efficiency increased significantly. The kinetics of MB degradation by TiO2/AC was of apparent first order reaction mechanism.
- Supported TiO2; Activated carbon support; Pore size; Photocatalyst; Methylene blue
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沈阳化工大学材料科学与工程学院沈阳 110142

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Influence of Pore Size and Surface Area of Activated Carbon on the Performance of TiO2/AC Photocatalyst

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通讯作者: 陈斌, bchen63@163.com

Influence of Pore Size and Surface Area of Activated Carbon on the Performance of TiO₂/AC Photocatalyst