光热治疗
纳米复合材料
环境修复
光催化
蛋壳
光动力疗法
光热效应
水消毒
化学工程
材料科学
纳米技术
化学
光化学
污染
环境科学
环境工程
有机化学
生态学
生物
催化作用
工程类
作者
Xiaohui Zhang,Minghuan Liu,Zewen Kang,Bingqing Wang,Bo Wang,Fuyi Jiang,Xiansong Wang,Da‐Peng Yang,Rafael Luque
标识
DOI:10.1016/j.cej.2020.124304
摘要
Abstract The full utilization of sunlight and design of high-efficient and low-cost photocatalysts with robust stability for wastewater treatment is still a challenging task. Herein, we report an economic and simple strategy to prepare a novel photocatalyst by using eggshell as template and support. Rod-like Copper sulphide (CuS) nanoparticles are uniformly coated on the surface of porous eggshell to form CaCO3/CuS nanocomposite. Under NIR irradiation, the nanocomposite shows a high catalytic activity for 4-nirophenol (4-NP) reduction and strong photothermal ablation behavior against bacteria. A 98% degradation rate can be completed in 15 min, superior to that in the absence of Near-infrared (NIR) light irradiation. Bacterial inactivation ability is also closely related with photocatalyst concentrations and NIR power. A possible mechanism is suggested, which is attributed to the synergistic photocatalytic, photothermal, photodynamic effects. Our study indicates that waste eggshell not only can be used as an efficient support to immobilize nanoparticles, but also can act as reaction resource to provide active carbonate radicals ( CO3−), which play an important role on target degradation molecules.
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