水热法制备SnO<sub>2</sub>纳米颗粒的CO氧化性能

摘要

针对日益严重的CO污染问题，通过在制备过程中引入CTAB模板，采用水热法对SnO₂催化剂的形貌结构进行控制。同时采用X射线衍射（XRD）、透射电镜（TEM）、N₂吸附（BET）、热重分析（TGA）以及H₂程序升温还原（H₂-TPR）等技术对SnO₂催化剂的结构及氧化还原能力进行表征，并考察了其催化CO氧化活性。结果表明：水热法合成的SnO₂催化剂为纳米颗粒状，具有高比表面积、均一粒径、分布均匀等特点，表面Sn⁴⁺浓度高于沉淀法制备的SnO₂催化剂，并且表现出了更加优异的CO氧化活性，表观活化能（E_a）从61.3下降到54.2 kJ·mol^-1。

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	柴澍靖
	李静
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	李新刚

关键词：水热法二氧化锡纳米颗粒 CO氧化

Abstract：

In order to solve the serious problem of CO pollution, nano SnO₂ catalyst was prepared with hydrothermal method. CTAB was introduced as a surfactant in the process. The morphology structure and oxidation reduction abilities of SnO₂ were investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), N₂ adsorption (BET), thermogravimetric analysis (TGA) and temperature programmed H₂ reduction (H₂-TPR), and CO oxidation activities were measured, as well. Our results show that the as-prepared SnO₂ nano-particles have higher specific surface area, uniform particle size and distribution, a higher surface Sn⁴⁺concentration than that of the conventional SnO₂catalyst prepared with precipitation method. Results show that the nano-SnO₂ catalysts possess higher activity for CO oxidation, and its E_a decreased from 61.3 to 54.2 kJ·mol^-1, as compared with the SnO₂catalyst prepared with precipitation method.

Keywords： hydrothermal method； SnO₂； nano particles； CO oxidation

Received 2016-03-21;

Fund:

国家自然科学基金（U1232118，21476159）。

Corresponding Authors: 李新刚,E-mail:xingang_li@tju.edu.cn. Email: xingang_li@tju.edu.cn

About author: 柴澍靖(1991-),男,硕士研究生,现从事环境催化方面的研究.

引用本文:

柴澍靖, 李静, 白雪芹, 李新刚.水热法制备SnO₂纳米颗粒的CO氧化性能[J]. 化学工业与工程, 2017,34(5): 19-24

Chai Shujing, Li Jing, Bai Xueqin, Li Xingang.CO Oxidation Performance over SnO₂ Nanoparticles Prepared with Hydrothermal Method[J]. Chemcial Industry and Engineering, 2017,34(5): 19-24

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