基于吸附和光催化活性的CuO/膨润土的制备及光催化作用
Preparation and Photocatalysis of CuO/Bentonite Based on Adsorption and Photocatalytic Activity.
作者信息
Yang Cuina, Xu Hongfa, Shi Jicun, Liu Zhifeng, Zhao Lei
机构信息
State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, China.
School of Civil Engineering and Architecture, Xinxiang University, Xinxiang 453003, China.
出版信息
Materials (Basel). 2021 Oct 4;14(19):5803. doi: 10.3390/ma14195803.
A CuO/bentonite composite photocatalyst was prepared to fully utilize the adsorption capacity of bentonite and the photocatalytic activity of CuO. CuO and bentonite were chosen as a photocatalyst due to the excellent optical property of CuO and large specific surface area of bentonite, together with their high stability and low production cost. The sample was characterized by XRD, SEM, and BET. The effects of several factors on degradation process were investigated such as dosage of HO, irradiation time, pH of the solution, and dosage of catalyst. The optimum conditions for decolorization of methylene blue solution by CuO/bentonite were determined. Under optimal conditions, the decolorization efficiency of methylene blue by a 1.4% CuO/bentonite (400 °C) composite photocatalyst under visible irradiation at 240 min reached 96.98%. The degradation process follow edpseudo-second-order kinetics. The photocatalytic mechanism is discussed in detail. This composite structure provides a new solution to the cycle and aggregation of the photocatalyst in water.
制备了一种CuO/膨润土复合光催化剂，以充分利用膨润土的吸附能力和CuO的光催化活性。由于CuO具有优异的光学性能、膨润土具有较大的比表面积，以及它们具有高稳定性和低生产成本，因此选择CuO和膨润土作为光催化剂。通过XRD、SEM和BET对样品进行了表征。研究了HO用量、辐照时间、溶液pH值和催化剂用量等几个因素对降解过程的影响。确定了CuO/膨润土对亚甲基蓝溶液脱色的最佳条件。在最佳条件下，1.4%的CuO/膨润土（400℃）复合光催化剂在可见光照射下240分钟对亚甲基蓝的脱色效率达到96.98%。降解过程遵循准二级动力学。详细讨论了光催化机理。这种复合结构为光催化剂在水中的循环和团聚提供了一种新的解决方案。
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