摘要
为了强化科研育人功能,结合科研项目内容设计了ZnO/CaCO_(3)复合材料光催化性能研究的综合化学实验。首先,采用共沉淀法制备了ZnO/CaCO_(3)复合材料,利用X-射线粉末衍射仪和扫描电子显微镜表征材料的结构和形貌,然后以亚甲基蓝模拟工业废水中的有机污染物,探究了复合材料的光催化性能。实验结果表明,光催化90 min后,ZnO/CaCO_(3)复合材料和ZnO对亚甲基蓝的降解率分别为91.75%和83.44%,说明ZnO/CaCO_(3)比纯ZnO具有更好的光催化降解亚甲基蓝的能力,这可能得益于ZnO和CaCO_(3)的协同作用。该实验教学内容共8学时,由学生分组完成,并有明确的课前预习和课后拓展内容。融化学学科理论、实践和应用为一体的综合化学实验项目设计有助于拓宽学生视野,提升学生实验操作技能、思维方法和创新能力。
To strengthen the educational function of scientific research,a comprehensive chemical experiment was designed to study the photocatalytic performance of ZnO/CaCO3 composite based on the scientific research project.First,the ZnO/CaCO_(3)composite was prepared using a co-precipitation method.The structure and morphology of the material were characterized using X-ray powder diffraction and scanning electron microscopy.Subsequently,the photocatalytic performance of the composite was measured by using methylene blue to simulate the organic pollutant in industrial wastewater.The results showed that the degradation ratio of methylene blue by using ZnO/CaCO_(3)composite and ZnO reached 91.75%and 83.44%respectively after 90 minutes of photocatalysis.It indicated that ZnO/CaCO_(3)composite had better photocatalytic ability than pure ZnO,which may be attributed to the synergistic effect of ZnO and CaCO_(3).This experimental teaching content spans 8 class hours,completed by students in groups,with clear pre-class preparation and post-class extension tasks.The design of comprehensive chemical experiment which integrates chemical theory,practice,and application plays an important role in broadening students’horizons and enhancing their experimental skills,thinking methods and innovative abilities.
作者
李红英
李雅晴
徐萏怩
丁爱民
姚成立
LI Hongying;LI Yaqing;XU Danni;DING Aimin;YAO Chengli(School of Chemistry and Pharmaceutical Engineering,Hefei Normal University,Hefei 230601,China)
出处
《乐山师范学院学报》
2025年第4期124-130,共7页
Journal of Leshan Normal University
基金
安徽省高等学校省级质量工程项目“大学基础化学实验教学创新团队”(2023cxtd073)
安徽省大学生创新训练项目“砀山梨提取物绿色合成ZnO及其光催化性能研究”(S202314098088)
合肥师范学院校级科研项目(科研促进教学专项)“复合光催化材料研究在物理化学课程教学中的应用”(2024KYJX37)。
