降级(电信)
光催化
异质结
可见光谱
热液循环
三元运算
材料科学
纳米颗粒
表面等离子共振
光电子学
纳米技术
核化学
化学工程
化学
计算机科学
催化作用
电信
工程类
有机化学
程序设计语言
作者
Kejie Jin,Mian Qin,Xinyi Li,Rui Wang,Yang Zhao,Huan Wang
标识
DOI:10.1016/j.molliq.2022.120017
摘要
Semiconductor photocatalysis can be regarded as one of effective strategies to overcome the great challenges encountered with conventional technologies for environmental remediation. In this research, Z-scheme heterostructure composed of core–shell [email protected]O2 nanoparticles and flower-like Bi2WO6 nanosheets has been successfully prepared through the reverse micelle sol–gel method followed by a hydrothermal process. The structural characteristics, chemical compositions and photoelectrochemical properties of this ternary composite photocatalyst ([email protected]2/Bi2WO6) were further investigated in detail. Benefitted from the synergy of the heterojunction construction and metallic surface plasmon resonance effect, the [email protected]2/Bi2WO6 with an optimal mass ratio of [email protected]2 to Bi2WO6 exhibited the significantly enhanced photocatalytic activity for degradation of antibiotics under visible-light irradiation, in which the degradation efficiency of sulfamethoxazole (SMX) and tetracycline hydrochloride (TC) could be up to 96.9% and 95.0% within 75 min, respectively. The reaction rate constant for SMX and TC degradation was calculated to be around 0.0425 min−1 and 0.0314 min−1, which has 7.2 times and 1.9 times enhancement compared with single Bi2WO6, respectively. In addition, the cyclic stability and photocatalytic mechanism of [email protected]2/Bi2WO6 were further verified. Our primary results provide a feasible strategy to develop core–shell heterostructured photocatalysts with superior performance for the efficient removal of low-concentration antibiotics in water.
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