硅酸盐学报

Sm掺杂TiO2降解苯胺黑药性能

作者：祝思频1 2 王春英1 2 3 位振亚1 2 陈志勇1 2 武翠婷1 4 罗仙平1 2 3

单位：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

分类号：X703.1

出版年,卷(期):页码：2018,46(11):0-0

DOI：10.14062/j.issn.0454-5648.2018.11.18

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.

基金项目：

“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。

作者简介：

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