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 Ce_0.75Zr_0.25O₂, 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