摘要
可见光芬顿法是解决水污染问题的一种新型技术,该技术不仅具有芬顿氧化法处理效率高、稳定性好、易于操作等优势,又具有能够有效利用可见光的特点,从而备受关注。本研究以泡沫铜为基底,依次采用阳极氧化法和水热法制备了CuO/Cu2O/ZnO复合材料芬顿催化剂,通过XRD、XPS、SEM、TEM、UV-Vis等分析测试手段对样品的微观形貌、结构组成和光学性能进行了表征,通过可见光下降解罗丹明B (RhB)溶液研究了样品的可见光芬顿催化性能。研究结果表明,相比于基底CuO/Cu2O纳米阵列,CuO/Cu2O/ZnO复合材料可见光芬顿催化降解性能有所提高。CuO/Cu2O/ZnO-4复合材料可见光下25 min降解了98%的RhB溶液,动力学常数为0.18 min−1,是CuO/Cu2O-60纳米阵列的1.5倍,重复循环5次催化降解试验后,30 min对RhB溶液的降解率为93%。ZnO与CuO/Cu2O纳米阵列复合形成了异质结,提高了可见光吸收性能,抑制了光生电子与空穴的复合效率,有效提高了可见光芬顿催化降解性能。
Visible light Fenton method, a newtechnology for solving water pollution, has attracted much attention due to itsadvantages of high efficiency, good stability, easy operation, and visiblelight absorption. In this study, CuO/Cu2O/ZnO compositesFenton catalyst were prepared by anodic oxidation method and hydrothermalmethod on the base of copper foam. The microstructure, composition and opticalproperties of the samples were systemically characterized by XRD, XPS, SEM, TEMand UV-Vis measurements. The visible-light Fenton catalytic performance of thesamples was evaluated by the degradation of Rhodamine B (RhB) under visiblelight. The research results indicate that compared with the base CuO/Cu2Onanoarrays, the photocatalytic degradation performance of CuO/Cu2O/ZnOcomposites are improved. The degradation rate of 98% RhB solution was 0.18 min−1,which was 1.5 times of CuO/Cu2O-60 nanoarray. After fivecycles, the degradation rate of RhB solution was 93% in 30 minutes. ZnO andCuO/Cu2O nanoarrays formed heterojunction, whichimproved the visible light absorption, inhibited the recombination efficiencyof photogenerated electrons and holes, and effectively improved the catalyticdegradation performance of visible light Fenton.
出处
《纳米技术》
CAS
2021年第3期43-53,共11页
Hans Journal of Nanotechnology
