Sm掺杂TiO2降解苯胺黑药性能  

Degradation Activity for Aniline Aerofloat of Sm-doped TiO2 Photocatalysts

作　　者：祝思频 王春英[1,2,3] 位振亚 陈志勇 武翠婷[1,4] 罗仙平 ZHU Sipin, WANG Chunying, WEI Zhenya, CHEN Zhiyong, WU Cuiting, L UO Xianping(Faculty of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China; Jiangxi Key Laboratory of Mining ＆ Metallurgy Environmental Pollution Control, Ganzhou 341000, Jiangxi, China;3. Post-doctoral Scientific Research Workstation of Western Mining Co., LTD., Xining 810000, China;4. CSPC Holdings Company Limited, Shijiazhuang 050000, Hebei, China)

机构地区：[1]江西理工大学资源与环境工程学院,江西赣州341000 [2]江西省矿冶环境污染控制重点实验室,江西赣州341000 [3]西部矿业股份有限公司博士后科研工作站,西宁810000 [4]石药控股集团有限公司,石家庄050000

出　　处：《硅酸盐学报》2018年第11期1632-1638,共7页Journal of The Chinese Ceramic Society

基　　金：“十二五”国家科技支撑计划项目(2012BAC11B07);教育部新世纪优秀人才支持计划(NCET-10-0183);江西省主要学科与技术带头人培养对象计划项目(2010DD01200);“赣鄱英才555工程”领军人才培养计划项目;中国博士后科学基金项目(2015M582776XE,2016T90967);江西理工大学清江青年英才支持项目

摘　　要：采用溶胶–凝胶法在不同煅烧温度下制备了不同Sm掺杂量TiO2 （x%Sm/TiO2）粉末。对制备的x%Sm/TiO2样品进行结构和性能表征,研究了x%Sm/TiO2粉末在紫外灯下对苯胺黑药的光催化降解性能。结果表明：适量Sm掺杂的TiO2比纯TiO2的光吸收强度及比表面积更大,且粒径更小。Sm掺杂TiO2粉末具有高的紫外光催化活性,在300 W汞灯照射下,500℃煅烧的0.25%Sm/TiO2样品催化反应180 min对苯胺黑药的降解率达91.9%,表现出较高催化效率。另外,0.25%Sm/TiO2重复使用4次后,对苯胺黑药的降解率无明显降低,表明Sm掺杂TiO2催化剂具有优良的稳定性。淬灭剂实验表明,催化剂降解苯胺黑药主要是羟基自由基和空穴的协同作用,其中羟基自由基起主要作用。Different Sm-doped TiO2（x%Sm/TiO2） powders were prepared by a sol-gel method at different calcination temperatures. The structure and physicochemical properties of x%Sm/TiO2 were characterized, and the photodegradation activity of x%Sm/TiO2 for aniline aerofloat was investigated under the irradiation of 300 W mercury lamps. The results indicate that the Sm-doped TiO2 has a greater light absorption intensity, a larger specific surface area and a smaller particle size, compared to pure TiO2. The Sm-doped TiO2 has a high UV photocatalytic activity. Under the light of 300 W mercury lamps, a 0.25%Sm/TiO2 powder calcined at 500 ℃shows the optimum photocatalytic activity, which is reflected by 91.9% removal efficiency to aniline aerofloat after 180 min. In addition, a 0.25%Sm/TiO2 powder still has a great photocatalytic activity for the photodegradation of aniline aerofloat after 4-time recycling, showing the stability of Sm-doped TiO2. The results of quenching experiment indicate that the photocatalytic activity based on the synergistic reaction between holes（h+） and hydroxyl radicals（·OH） while the ·OH acts as the major role.

关 键 词：钐掺杂 二氧化钛 光催化剂 苯胺黑药 正交实验 

分 类 号：X703.1[环境科学与工程—环境工程]