环化聚丙烯腈/TiO_2纳米复合材料的制备及可见光催化活性  

Preparation and visible-light photocatalytic performances of cyclized polyacrylonitrile/TiO_2 nanocomposites

作　　者：王晓静[1] 王琳[1] 罗青枝[1] 王鹏[1] 徐莉[1] 王德松[1] 

机构地区：[1]河北科技大学理学院,河北石家庄050018

出　　处：《河北科技大学学报》2015年第5期487-492,共6页Journal of Hebei University of Science and Technology

基　　金：国家自然科学基金(21271061);河北省自然科学基金(B2014208103)

摘　　要：以钛酸四丁酯为钛源,在溶胶-凝胶法制备纳米TiO2溶胶过程中加入聚丙烯腈的二甲基亚砜溶液,制备含有聚丙烯腈的TiO2凝胶,再经热处理得到环化聚丙烯腈/TiO2纳米复合材料。采用XRD,TEM,UV-vis,DRS,PL等方法对环化聚丙烯腈/TiO2纳米复合材料进行分析表征。以甲基橙为模型污染物,考察了该类纳米复合材料的可见光催化活性。结果表明,环化聚丙烯腈/TiO2纳米复合材料具有良好的可见光催化活性和稳定性;当聚丙烯腈与TiO2质量比为1︰300、热处理时间为1h、热处理温度为270℃时,该纳米复合材料表现出最佳的可见光催化活性。TiO2nanomaterials were prepared by a conventional sol-gel method with tetrabutyl titanate as Ti source.The polyacrylonitrile solution with dimethyl sulfoxide as solvent was added into TiO2 sols to form TiO2 gels containing polyacrylonitrile,then the as-prepared TiO2 gels were heat-treated to prepare cyclized polyacrylonitrile/TiO2（CPAN/TiO2）nanocomposites.The CPAN/TiO2 nanocomposites were characterized by X-ray diffraction（XRD）,transmission electron microscopy（TEM）,UV-vis diffuse reflection spectroscopy（DRS）and photoluminescence spectroscopy（PL）.The visible-light photocatalytic performances of CPAN/TiO2 nanocomposites were investigated by evaluating the decomposition of methyl orange.The results reveal CPAN/TiO2 nanocomposites exhibit excellent visible-light photocatalytic acitivity and stability,and show the highest visible-light photocatalytic activity when the mass ratio of CPAN to TiO2,heat-treatment temperature and time are 1∶300,270℃and 1h,respectively.

关 键 词：催化化学 TIO2 聚丙烯腈 溶胶-凝胶法 光催化降解 改性 

分 类 号：O649.4[理学—物理化学]