材料光催化产氢性能评价的实验教学改革探索

Experimental teaching innovates exploring of evaluation about photocatalytic H_(2) production

工程教育专业认证要求学生具备解决复杂工程问题的能力,课程实验是培养学生能力的重要环节.本文以光催化产氢实验为例,从实验内容设计、材料准备、现象观察以及结果分析等方面,针对性地提出面向工程教育专业认证的材料实验课程教学改革方法.在本实验中,采用水热法一步合成半导体纳米材料ZnIn_(2)S_(4),研究热处理温度对其可见光分解水产氢速率的影响.研究表明,当热处理温度为300℃时,ZnIn_(2)S_(4)有着最佳的可见光产氢性能,产氢速率达591.3μmol/h.本实验内容紧密联系光催化科技前沿热点,涵盖课堂教学多个知识点,能够满足培养学生解决复杂工程问题的要求;有利于学生巩固基础理论知识,培养学生的创新性和科研兴趣,提升科研素养.

Engineering education professional certification requires students to have the ability to solve complex engineering problems,and curriculum experiment is an important part of cultivating students’ability.In this paper,taking the photocatalytic H_(2) production experiment as an example,the teaching reform method of material experiment course for engineering education professional certification is proposed from the aspects of experiment content design,material preparation,phenomenon observation and result analysis.In this experiment,semiconductor nanomaterial ZnIn_(2)S_(4) was synthesized by onestep hydrothermal methods,and the effect of thermal treatment temperature on the aquatic H_(2) production rate under visible light irradiation was studied.The results show that ZnIn_(2)S_(4) has the best visible light H_(2) production performance when the heat treatment temperature is 300℃,and the H_(2) production rate is 591.3μmol/h.The content of this experiment is closely related to the frontier and hot spot of photocatalysis technology,which covers a lot of knowledge in classroom teaching and meets the requirement of solving complex engineering problems.It is helpful for students to consolidate basic theoretical knowledge,cultivate students’innovation and scientific research interest,and improve their scientific research literacy.