AN Tai-cheng¹, DING Xue-jun^{1, 2}, CHEN Jiang-yao^{1, 2}, LI Gui-ying¹, CHEN Jia-xin^{1, 2}, FU Jia-mo¹, SHENG Guo-ying
1. State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;
2. Graduate School of Chinese Academy of Sciences, Beijing 100049, China

Abstract: The surfactant modified TiO₂ pillared clay was prepared by sol-gel method at certain ratio of tetra-n-butyl titanium to hydrochloric acid modified by non-ionic surfactant polyvinyl alcohol ( PVA). Thermal gravity analysis (TGA) , X-ray diffraction (XRD) and Scanning electron microscopy (SEM) were used to investigate the texture of the prepared catalyst, and its BET surface area was also measured. The results indicated that PVA-modified TiO₂ pillared clay was well pillared by the anatase TiO₂ and the BET surface area was enhanced substantially. The surface of PVA-modified TiO2 pillared clay became more hydrophobic after modified by PVA. The adsorption and photocatalytic performance of PVA-modified TiO₂ pillared clay were also studied by using methyl orange as model organic pollutant. It was found that PVA-modified TiO₂ pillared clay showed excellent adsorption ability and moderate photocatalytic activity to methyl orange. About 41% and 53% of methyl orange were adsorbed and degraded by the PVA-modified TiO₂ pillared clay catalyst within 40min.

Key words: pillared clay; non-ionic surfactant; adsorption; photocatalytic; methyl orange

*Corresponding Author, E-Mail: antc99@gig.ac.cn

Bulletin of Mineralogy, Petrology and Geochemistry Vol. 30, No.1, 2011, page 53-58

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