多孔LaMO3(M=Co,Fe)纳米催化剂的制备及一氧化碳催化氧化性能

doi:10.16085/j.issn.1000-6613.2016-2263

化工进展 ›› 2017, Vol. 36 ›› Issue (S1): 261-266.DOI: 10.16085/j.issn.1000-6613.2016-2263

多孔LaMO₃(M=Co,Fe)纳米催化剂的制备及一氧化碳催化氧化性能

王毅, 王燕, 曹建亮, 张火利, 陈泽华, 李高杰

河南理工大学化学化工学院, 河南焦作 454000

收稿日期:2016-12-06 修回日期:2017-03-16 出版日期:2017-12-31 发布日期:2017-12-13
通讯作者: 王燕,博士,副教授。
作者简介:王毅(1990-),男,硕士研究生。
基金资助:
国家自然科学基金（51404097，51504083）、河南省高校科技创新人才支持计划（17HASTIT029）、中国博士后科学基金（2016M592290）、河南省高等学校青年骨干教师培养计划（2016GGJS-040）及河南理工大学杰出青年科学基金（J2016-2，J2017-3）项目。

Preparation of porous LaMO₃(M=Co,Fe)nanocatalysts and their catalytic activities for CO oxidation

WANG Yi, WANG Yan, CAO Jianliang, ZHANG Huoli, CHEN Zehua, LI Gaojie

School of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, Henan, China

Received:2016-12-06 Revised:2017-03-16 Online:2017-12-31 Published:2017-12-13

摘要/Abstract

摘要： 钙钛矿型氧化物催化剂（ABO₃）具有廉价易得、高热稳定性、催化活性高的优点，在催化一氧化碳（CO）低温脱除领域具有重要的理论研究意义和实际应用价值。本研究中，以聚苯乙烯（PS）微球、碳微球为模板，硝酸镧、硝酸钴、硝酸铁为金属源，柠檬酸为络合剂，通过溶胶-凝胶法制备了多孔LaCoO₃和多孔LaFeO₃催化剂。采用X射线衍射、热重-差热、扫描电镜、透射电镜和氮气吸附-脱附等手段对所得样品进行了系统表征分析。结果表明：所制备的催化剂具有高纯度和高热稳定性。加入11.12g PS微球所制备的多孔LaCoO₃催化剂平均颗粒粒径为13nm，加入0.5g碳微球制备的多孔LaFeO₃催化剂平均粒径为19nm，且具有介孔和微孔分级孔结构。催化性能测试结果表明：在同等条件下对CO转化率达到50%时，多孔LaCoO₃和多孔LaFeO₃使得催化温度分别降低了43℃和32℃；CO完全转化温度则分别降低了90℃和60℃。

关键词: 多孔, 纳米粒子, 催化剂, 一氧化碳, 氧化

Abstract: The perovskite type catalyst(ABO₃)has the advantages of cheap availability,high thermal stability and high catalytic activity,and has important theoretical research value and practical application value in the field of catalyzing the low temperature removal of carbon monoxide(CO).In this study,porous LaCoO₃ and porous LaFeO₃ nanoparticles catalyst were prepared by sol-gel method using polystyrene(PS)microspheres,carbon microspheres as template,lanthanum nitrate,cobalt nitrate,ferric nitrate as metal source and citric acid as complexing agent.The samples were characterized by X-ray diffraction,thermogravimetry-differential thermal,scanning electron microscope,transmission electron microscope and nitrogen adsorption-desorption.The results show that the synthesized catalyst has high purity and high thermal stability.The average particle size of the porous LaCoO₃ catalyst prepared by adding 11.12g of PS microspheres was 13nm.The porous LaFeO₃ catalyst prepared by adding 0.5g of carbon microspheres was 19nm,and they both have the mesoporous and microporous pore structure.The results showed that the CO conversion temperature of porous LaMO₃ was reduced by 43℃ and 32℃ when the CO conversion reached 50% compared with the LaMO₃without template under the same conditions.The CO complete conversion temperature was reduced by 90℃ and 60℃.

Key words: porous, nanoparticles, catalyst, carbon monoxide, oxidation

中图分类号:

O614

王毅, 王燕, 曹建亮, 张火利, 陈泽华, 李高杰. 多孔LaMO₃(M=Co,Fe)纳米催化剂的制备及一氧化碳催化氧化性能[J]. 化工进展, 2017, 36(S1): 261-266.

WANG Yi, WANG Yan, CAO Jianliang, ZHANG Huoli, CHEN Zehua, LI Gaojie. Preparation of porous LaMO₃(M=Co,Fe)nanocatalysts and their catalytic activities for CO oxidation[J]. Chemical Industry and Engineering Progress, 2017, 36(S1): 261-266.

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多孔LaMO₃(M=Co,Fe)纳米催化剂的制备及一氧化碳催化氧化性能

Preparation of porous LaMO₃(M=Co,Fe)nanocatalysts and their catalytic activities for CO oxidation

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