Schiff碱改性法制备Ag/TiO2纳米粒子催化剂及其催化性能

doi:10.11944/j.issn.1000-0518.2015.06.140363

摘要/Abstract

摘要：

通过引入水杨醛衍生的Schiff 碱功能单体与钛酸正丁酯发生水解共缩聚反应,制备了二氧化钛负载的银纳米粒子催化剂。采用红外光谱分析仪(FTIR)、广角X射线衍射仪(Wide Angle XRD)、高分辨透射电子显微镜(HRTEM)和紫外-可见分光光度计(UV-Vis) 等技术手段对制得的样品进行了表征,并考察了样品催化CO氧化反应的活性。结果表明,通过改变Schiff碱功能单体的用量和样品焙烧温度可以调控Ag纳米粒子的粒径和TiO₂载体的结构,从而可以调控Ag/TiO₂纳米催化剂的活性。当Schiff碱功能单体用量为20%,焙烧温度为873 K时,Ag/TiO₂纳米催化剂活性最好,CO转化率达到99.9%。

关键词: Schiff碱, 二氧化钛, 银, 纳米粒子, 氧化反应

Abstract:

The TiO₂-supported Ag nanoparticles were prepared by hydrolytic polycondensation of titanium tetrabutoxide with salicylaldimine Schiff base functional monomer. The prepared Ag/TiO₂ nanocatalysts were characterized by FTIR, XRD, HRTEM and UV-Vis, and tested for CO oxidation. The particle size of Ag nanoparticles and the structure of TiO₂ supports can be controlled by the content of functional monomer and calcined temperature, and therefore, the catalytic activity of Ag/TiO₂ nanocatalysts can be controlled. The maximum conversion of CO reached 99.9% for the sample with 20% of the functional monomer and calcined at 873 K.

Key words: Schiff base, titanium dioxide, silver, nanoparticle, oxidation

中图分类号:

喻龙宝, 闫鹏洁, 赵震, 严玉, 徐虎, 张文鹏. Schiff碱改性法制备Ag/TiO₂纳米粒子催化剂及其催化性能[J]. 应用化学, 2015, 32(6): 676-682.

YU Longbao, YAN Pengjie, ZHAO Zhen, YAN Yu, XU Hu, ZHANG Wenpeng. Schiff Base-modification Synthesis of Ag/TiO₂ Nanocatalysts and Their Catalytic Performance for CO Oxidation[J]. Chinese Journal of Applied Chemistry, 2015, 32(6): 676-682.

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Schiff碱改性法制备Ag/TiO₂纳米粒子催化剂及其催化性能

Schiff Base-modification Synthesis of Ag/TiO₂ Nanocatalysts and Their Catalytic Performance for CO Oxidation

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