大学化学 >> 2022, Vol. 37 >> Issue (5): 2111081.doi: 10.3866/PKU.DXHX202111081

所属专题： 第2届全国大学生化学实验创新设计竞赛

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Ce0.75Zr0.25O2的制备及其催化净化汽车尾气

青雯玥, 陈起游, 贾阿龙, 李珊珊, 赵明, 郭彩红()   

  • 收稿日期:2021-11-29 录用日期:2021-12-07 发布日期:2022-04-11
  • 通讯作者: 郭彩红 E-mail:guocaihong@scu.edu.cn
  • 作者简介:郭彩红, Email: guocaihong@scu.edu.cn
  • 基金资助:
    国家自然科学基金项目(21972097)

Ce0.75Zr0.25O2: Preparation and Application for Catalytic Purification of Auto-Mobile Exhaust

Wenyue Qing, Qiyou Chen, Along Jia, Shanshan Li, Ming Zhao, Caihong Guo()   

  • Received:2021-11-29 Accepted:2021-12-07 Published:2022-04-11
  • Contact: Caihong Guo E-mail:guocaihong@scu.edu.cn

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摘要：

基于CeO2基氧化物制备及应用于环境保护的已有创新性成果，将其设计转化成为适合本科生的综合创新实验。在转化过程中设计了一系列的对照组，考察了沉淀pH、沉淀剂种类、过滤方式等制备条件及不同铈锆比例等因素对氧化物性能的影响。结果表明，采用环境友好的碳酸钠沉淀剂，pH控制在8–10范围内，通过简单易行的共沉淀法制得的Ce0.75Zr0.25O2氧化物，催化性能优异，污染物转化效率可达95%。本实验将前沿科技与经典实验结合，体现了科教融合和创新发展的教学理念，顺应了科技治污的号召，有益于培养学生的科学思维和创新能力，有利于提高学生环保和稀土资源战略意识，增强社会责任感和民族自豪感。

关键词: 铈锆稀土氧化物, 汽车尾气催化净化, 科教融合, 综合创新实验

Abstract:

The preparation of CeO2-based catalysts has been transformed to a comprehensive experiment for undergraduates based on its existing innovative achievements toward environmental protection. In the transformation, the effect of preparation conditions (such as precipitation pH, precipitation agent, filtration method, and different Ce/Zr ratio) on the performance of the catalysts was investigated. The results indicated that Ce0.75Zr0.25O2, prepared by a simple co-precipitation method with sodium carbonate as an environmentally friendly precipitant and at pH 8–10, exhibited excellent activity; its pollutant conversion efficiency reached up to 95%. This experimental study combines the cutting-edge technology with classic experiments, to promote a teaching concept that allows the integration of science, education, and innovative developments. To achieve pollution control through strategies based on science and technology, this experimental study was conducive to improving students' awareness of environmental protection and resource strategy. As a result, students significantly benefited from this new experiment by enhancing their social responsibility and national pride.

Key words: Cerium zirconium rare earth oxide, Catalytic purification of automobile exhaust, Integration of science and education, Comprehensive innovation experiment

MSC2000: 

  • G64