SDS对所制备的TiO2可见光催化活性的影响
Journal of Beihua University(Natural Science)(2017)
Abstract
十二烷基磺酸钠(SDS)辅助TiCl4水解,成功地制备了纯二氧化钛光催化剂(TPC),利用透射电子显微镜、X射线衍射、紫外-可见光谱及氮气吸附/脱附对所有的TPC进行了表征.光催化活性测试结果表明:所制备的样品可见光催化降解甲基橙的活性均好于P25,且随着TiCl4与SDS物质的量比增大,催化降解效率提高.SDS的存在有助于通过调控颗粒间的作用强度来调控高能氧桥键的分布,从而调控可见光催化活性;活性晶面的暴露也利于光催化活性的提高.使用TiCl4与SDS物质的量比为51.2的TPC4,在可见光(35 W普通民用光源)下照射3h,甲基橙降解率高达74.4%,预示其在光催化自清洁内墙涂料方面具有潜在的应用前景.
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Key words
sodium dodecanesulphonate(SDS),titania,visible light photocatalysis,methyl orange(MO),high-energy oxo-bridging,self-cleaning interior building latex coating
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