光催化
四环素
降级(电信)
光电流
纳米复合材料
材料科学
光化学
异质结
四环素类抗生素
反应速率常数
化学工程
化学
动力学
纳米技术
催化作用
光电子学
有机化学
抗生素
物理
工程类
电信
量子力学
生物化学
计算机科学
作者
Shashikant Kaushaley,Raj Kumar Dutta
标识
DOI:10.1016/j.inoche.2023.111576
摘要
Step-scheme band configuration is considered to be an excellent option for photocatalytic applications including degradation of organic pollutants. This phenomenon has been demonstrated here via sunlight mediated photocatalytic degradation of trace concentrations of antibiotics in water by SnWO4/BiMoO6 nanocomposites. The structural, morphological, textural, compositional and optical properties of the hydrothermally synthesized SnWO4/BiMoO6 nanocomposites are critical towards enhanced photocatalytic degradation kinetics of tetracycline, used here for mimicking antibiotic residue in water. The optimized batch of 0.10SnWO4/Bi2MoO6 photocatalyst exhibited step-type band position and accounted for 95 % sunlight mediated photocatalytic degradation of tetracycline solution at a rate constant of 0.031 min−1. The degradation rate is six times higher than that of pristine Bi2MoO6 and fifteen times higher than that of SnWO4 nanoparticles. The mechanism involved in the photocatalytic degradation of tetracycline hydrocloride has been addressed in the light of (a) enhanced absorption of sunlight by 0.10SnWO4/Bi2MoO6; (b) favourable type-II-like band position of Bi2MoO6 and SnWO4 leading to heterojunction formation, (c) electrochemical studies showing charge carrier mobility and photocurrent measurements showing inhibition of charge carrier recombination, and (d) in situ generation of hydroxyl radicals.
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