Undergraduate Innovative Chemical Experiment of Antibiotic Degradation by Ag ₉ (SiO ₄ ) ₂ NO ₃

To enhance innovative awareness, practical skills, and environmental consciousness of students, an innovative chemical experiment focusing on the green and low-carbon synthesis of Ag9(SiO4)2NO3 (ASN) and the photocatalytic degradation performance and mechanism of antibiotics was introduced to undergraduates. In this experiment, students were guided to synthesize ASN via a coprecipitation method and subsequently perform comprehensive analyses using various characterization techniques, including phase, morphological, and photoelectrochemical analyses. The photocatalytic degradation performance was then evaluated using antibiotics (oxytetracycline and ciprofloxacin) as target pollutants. This teaching practice has shown that ASN synthesized by students exhibited significantly superior antibiotic degradation performance compared with P25 and g-C3N4. The integrated system encompassing synthesis, characterization, application, and mechanistic study effectively cultivated interdisciplinary knowledge integration skills, instrument operation proficiency, and data analysis literacy of students, while reinforcing green chemistry principles and innovative scientific thinking. The course employed a multifaceted quantitative assessment system along with a team-based discussion and feedback mechanism, creating a teaching closed-loop that deeply integrated foundational training with innovative practice. This model offers a replicable approach for talent cultivation in the fields of new materials and environmental chemistry.