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《Journal of Functional Materials》 2006-04
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The effect of different acid hydrolysis catalysts on the photocatalytic activity of surfactants modified TiO_2 pillared montmorillonites

AN Tai-cheng~1,YUAN Jian-mei~2,CHEN Jia-xin~(1,3),HU Xiao-hong~(1,3),CHEN Hui~2,DING Xue-jun~(1,2),SHENG Guo-ying~1,FU Jia-mo~1(1.State Key Laboratory of Organic Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Science,Guangzhou 510640,China;2.Chemistry and Chemical Engineering College,Northwest Normal University,Lanzhou 730070,China;3.Graduate School of Chinese Academy of Sciences,Beijing 100049,China)  
TiO_2 pillared clays were prepared by sol-gel method at certain ratio of Ti(OC_4H_9)_4 to acetic acid and Ti(OC_4H_9)_4 to hydrochloric acid.The pillared clays were pre-modified by cation surfactant cetyltrimethyl ammonium bromide(CTMAB) before clays were pillared with sol solution.Scanning electron microscopy(SEM) and X-ray diffraction(XRD) were used to investigate the texture of prepared catalysts,and their BET surface areas were also measured.The results indicated that the pillared montmorillonites were well pillared by the Anatase TiO_2 and the BET surface areas were by far larger than the orient one.And then the sorption and photocatalytic performance of prepared pillared clays catalysts were studied by using methyl orange as mode organic pollutant.The pillared montmorillonites prepared by different acid showed different sorption and photocatalytic property which was mainly resulted from the different ionization of the acid.Moreover,it is found that although the TiO_2 pillared clay prepared by hydrochloric acid have higher adsorption efficiency for the mode organic pollutants than that prepared by acetic acid,the TiO_2 pillared clay prepared by acetic acid have more excellent photocatalytic activity for the degradation of mode organic pollutants than the hydrochloric acid one.
【Fund】: 国家自然科学基金资助项目(40302016);; 广东省自然科学基金资助项目(030466);; 有机地球化学国家重点实验室开放基金资助项目(OGL-200309)
【CateGory Index】: O643.36
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