Duan Yongzheng, Shen Yulian
College of Chemistry & Chemical Engineering, Binzhou University, Binzhou 256603, China E-mail:
Department of Traumatic Orthopedics, Binzhou People's Hospital, Binzhou 256600, China.
Water Sci Technol. 2017 Jul;76(1-2):172-181. doi: 10.2166/wst.2017.196.
The photocatalytic properties of ZnO-CuO catalysts supported on siliceous MCM-48 (Mobil Composition of Matter No. 48) for the degradation of organic pollutions such as methylene blue and salicylic acid under UV light irradiation were investigated. These catalysts were prepared by impregnation of MCM-48 with a mixed aqueous solution of copper acetate and zinc acetate. X-ray diffraction, N-physisorption, high resolution transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and photoluminescence were used to characterize these samples. Results from characterizations showed that the addition of ZnO to CuO/MCM-48 could markedly improve the photocatalytic degradation properties. The enhanced photocatalytic behaviors of ZnO-CuO/MCM-48 may be due to the formation of p-n heterojunctions between ZnO and CuO, resulting in the effective separation of photogenerated electron-hole pairs. Moreover, the photocatalysts were easily recovered and reused for five cycles without considerable loss of activity.
研究了负载在硅质MCM-48（移动物质组成编号48）上的ZnO-CuO催化剂在紫外光照射下对亚甲基蓝和水杨酸等有机污染物的光催化降解性能。这些催化剂通过用醋酸铜和醋酸锌的混合水溶液浸渍MCM-48制备。采用X射线衍射、N物理吸附、高分辨率透射电子显微镜、扫描电子显微镜、傅里叶变换红外光谱、X射线光电子能谱和光致发光对这些样品进行表征。表征结果表明，向CuO/MCM-48中添加ZnO可显著提高光催化降解性能。ZnO-CuO/MCM-48增强的光催化行为可能归因于ZnO和CuO之间形成了p-n异质结，导致光生电子-空穴对的有效分离。此外，光催化剂易于回收并重复使用五个循环，而活性没有明显损失。
