柠檬酸辅助溶剂热法制备Bi2MoO6及其光催化性能

摘要/Abstract

摘要： 高效可见光响应光催化材料的开发对光催化技术的发展有着至关重要的作用。采用柠檬酸(CA)辅助溶剂热法制备Bi₂MoO₆,对其进行XRD、SEM、UV-Vis DRS、BET及PL表征,并研究可见光下降解环丙沙星(CIP)、灭活大肠杆菌(E. coli)和金黄色葡萄球菌(S. aureus)的性能。CA添加量为3 mmol时制备的BM-3展现出最优的光催化活性,在100 min内对CIP的降解率达到89.5%,其反应速率常数为不添加CA制备的BM-0的2.45倍,也能在150 min内将E.coli完全灭活,在200 min内将S. aureus灭活,失活后的细菌细胞由于内容物泄漏而表面凹陷且易聚集。多次循环实验证明BM-3具有良好的稳定性。宽的可见光吸收范围、大的比表面积和高效的光生载流子分离效率有利于CA辅助溶剂热法制备的Bi₂MoO₆光催化性能增强。

关键词: 柠檬酸, Bi₂MoO₆, 光催化, 溶剂热法, 抗菌性能, 环丙沙星

Abstract: The development of efficient visible light-responsive photocatalysts is of great importance to the advancement of photocatalytic technology. Bi₂MoO₆ was prepared via the citric acid (CA)-assisted solvothermal method and characterized by XRD, SEM, UV-Vis DRS, BET, and PL. The photocatalytic performance of the synthesized material was evaluated by ciprofloxacin (CIP) degradation, Escherichia coli (E. coli) and Staphylococcus aureus (S. aures) inactivation under visible light. Bi₂MoO₆ prepared with 3 mmol amount of CA, namely BM-3, exhibits the optimal photocatalytic activity. The CIP degradation efficiency of BM-3 reaches 89.5% within 100 min, which is 2.45 times higher than that of BM-0 prepared without CA. In addition, BM-3 could completely inactivate E. coli within 150 min or S. aures within 200 min, causing concave surfaces and cell aggregation due to the leakage of cellular contents. Multiple cycles of experimentation were conducted to validate the stability of BM-3. The wide visible light absorption range, large specific surface area, and efficient photogenerated carrier separation efficiency were key factors contributing to the superior photocatalytic performance of Bi₂MoO₆ synthesized by the CA-assisted solvothermal method.

Key words: citric acid, Bi₂MoO₆, photocatalysis, solvothermal method, antibacterial property, ciprofloxacin

中图分类号:

马占强, 王楠, 郭葳, 张凯悦, 李娟. 柠檬酸辅助溶剂热法制备Bi₂MoO₆及其光催化性能[J]. 人工晶体学报, 2023, 52(8): 1477-1484.

MA Zhanqiang, WANG Nan, GUO Wei, ZHANG Kaiyue, LI Juan. Citric Acid-Assisted Solvothermal Synthesis of Bi₂MoO₆ and Its Photocatalytic Performance[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2023, 52(8): 1477-1484.

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柠檬酸辅助溶剂热法制备Bi₂MoO₆及其光催化性能

Citric Acid-Assisted Solvothermal Synthesis of Bi₂MoO₆ and Its Photocatalytic Performance

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