基于OBE理念的一个综合性化学实验案例设计——硅藻土负载TiO₂光催化甲醛降解

Design of a Comprehensive Chemical Experiment Case Based on OBE Concept—Photocatalytic Degradation of Formaldehyde by TiO₂ Loaded Diatomite

摘要: 以成果导向教育(OBE)理念为核心，设计面向化学、材料、环境类本科生的综合性创新化学实验——硅藻土负载TiO₂光催化降解甲醛。本实验覆盖无机材料合成、材料微观结构表征、分光光度定量分析、光催化性能评价等多模块内容，围绕专业毕业要求反向设计教学目标，构建“课前文献研学–课堂综合实操–课后成果答辩”一体化教学闭环，可拆分独立模块按需授课，兼顾分层教学需求。该实验能够系统性训练学生文献检索、实验操作、数据处理、科研写作与问题解决能力，落实创新意识、工程环保素养等高阶育人成果，适配本科化学类专业实验教学推广。

Abstract: Based on the Outcome-Based Education (OBE) concept, this paper designs a comprehensive innovative chemical experiment for undergraduates majoring in chemistry, materials and environmental disciplines, namely photocatalytic degradation of formaldehyde by diatomite-loaded TiO₂. This experiment covers multiple modules including inorganic material synthesis, material microstructure characterization, spectrophotometric quantitative analysis, and photocatalytic performance evaluation. Backward design of teaching objectives is implemented in accordance with program graduation requirements, constructing an integrated teaching closed-loop of “pre-class literature research, in-class comprehensive hands-on practice, post-class achievement defense”. Its modules can be separated and deployed on-demand to accommodate stratified teaching. It can systematically train students’ abilities in literature retrieval, experimental operation, data processing, scientific writing and practical problem-solving, and foster high-order learning outcomes such as innovative awareness and engineering-oriented environmental literacy. It is suitable for popularization in experimental teaching among undergraduate chemistry-related majors.