不同晶面锐钛矿TiO2对正己烷和丙酮的催化降解  

Catalytic degradation of n-hexane and acetone on anatase TiO2 with exposed different facets

作　　者：任璐 REN Lu(School of Civil Engineering,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]苏州科技大学土木工程学院,江苏苏州215009

出　　处：《化工环保》2020年第6期639-644,共6页Environmental Protection of Chemical Industry

基　　金：国家自然科学基金项目(51902219);江苏省自然科学基金项目(BK20190949)。

摘　　要：通过水热法(180℃)分别制备出{001}面表面含氟、{001}面表面不含氟和{101}面3种锐钛矿型TiO2光催化剂(分别记为C-{001}-F、C-{001}和C-{101})。考察了3种光催化剂在室温光催化和光热协同催化条件下分别降解非极性分子正己烷和极性分子丙酮的催化活性。对于室温光催化降解正己烷和丙酮,3种催化剂有类似的活性顺序,C-{001}-F的活性最高,经表面去氟后的C-{001}活性下降,但与C-{101}的活性无显著差别。在光热协同催化条件下,3种催化剂的活性与室温光催化条件下相比均有显著提高。对于光热协同催化降解正己烷,C-{001}表现出最高的活性,显著高于C-{001}-F和C-{101};对于光热协同催化降解丙酮,C-{001}-F表现出最高的活性,而C-{001}与C-{101}的活性差别不大。Anatase TiO2 photocatalysts with exposed{001}facets containing F,exposed{001}facets without F and exposed{101}facets(noted as C-{001}-F,C-{001}and C-{101})were prepared by hydrothermal method at 180℃,respectively.The photocatalytic activity at near room temperature and the photothermal synergistic catalytic activity of the 3 photocatalysts for degradation of nonpolar n-hexane and polar acetone were tested,respectively.For photocatalytic degradation of n-hexane and acetone,the activity orders of the 3 photocatalysts were similar and C-{001}-F exhibited the best photocatalytic activity.Without F,C-{001}showed lower photocatalytic activity than that of C-{001}-F which was not significantly different to that of C-{101}.The photothermal synergistic catalytic activity of the 3 photocatalysts was clearly better than their photocatalytic activity.For photothermal synergistic catalytic degradation of n-hexane,the optimum sample was C-{001},which showed higher activity than that of C-{001}-F and C-{101}.For photothermal synergistic catalytic degradation of acetone,the optimum sample was C-{001}-F while the difference between C-{001}and C-{101}was not apparent.

关 键 词：锐钛矿型TiO2 光催化 正己烷 丙酮 晶面 

分 类 号：X701[环境科学与工程—环境工程]