光催化
材料科学
异质结
铜
激进的
降级(电信)
四环素
可见光谱
矿化(土壤科学)
X射线光电子能谱
化学工程
化学
光化学
核化学
催化作用
冶金
有机化学
氮气
光电子学
生物化学
抗生素
工程类
计算机科学
电信
作者
Wenxin Huang,Hu Wei,Caiyun Jiang,Yuping Wang
出处
期刊:Huan jing ke xue= Huanjing kexue
日期:2020-12-08
卷期号:41 (12): 5488-5499
被引量:1
标识
DOI:10.13227/j.hjkx.202001213
摘要
Bi2MoO6/Bi2S3 heterojunctions were synthesized by the solvothermal method. The morphology, chemical composition, and photoelectric properties of the heterojunction materials were characterized by XRD, TEM, UV-Vis, XPS, and I-T. Tetracycline (TC) and tetracycline-copper (TC-Cu) composites were degraded by the as-prepared heterojunctions under visible light. The effects of pH, initial concentration of TC, and molar ratio of TC to Cu2+ on the degradation deficiency of TC were investigated. Additionally, the main active radicals, intermediates, and mechanisms were ascertained by in situ capture experiments and the identification of intermediates. The toxicities of TC and TC-Cu before and after degradation were evaluated by chlorella growth inhibition experiments. The results showed that the prepared Bi2MoO6/Bi2S3 heterojunction was a uniform nanosheet and its band gap was 1.76 eV. Bi2MoO6 and Bi2S3 with a mass ratio of 3:1 (MS-0.3) exhibited a composite ratio of TC and Cu2+ was 2:1 and had the best photocatalytic performance. When the concentration of TC was 10 mg·L-1 with neutral solutions, after reacting for 60 min, the degradation rate of TC and mineralization rate of the solution for TC-Cu were 85.63% and 52.94%, respectively. The results of active group capture experiments showed that the main active group of the heterojunction was the·O2- radical in visible light. In addition, the results of growth inhibition experiments showed that the presence of Cu2+ reduces the toxicity of TC photocatalytic degradation products in the TC-Cu complex, and the antibiotics can be effectively removed in the TC-Cu complex by photocatalytic oxidation.
科研通智能强力驱动
Strongly Powered by AbleSci AI