Cu2(OH)PO4-CdS异质结的合成及其光催化性能研究-中国材料进展

文章信息/Info

Title:: Synthesis and Photocatalytic Properties of Cu2(OH)PO4-CdS Heterojunctions with VisibleLight Response

作者:: 陈燕; 沈晓凤; 金嫣; 张丽莎; 陈志钢; （1. 东华大学材料科学与工程学院纤维材料改性国家重点实验室，上海 201620) （2. 东华大学环境科学与工程学院，上海 201620)

Author(s):: CHEN Yan; SHEN Xiaofeng; JIN Yan1; ZHANG Lisha; CHEN Zhigang; (1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China) (2. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China)

Keywords:: copper hydroxyphosphate; cadmium sulfide; heterojunction; photocatalysis; methylene blue; tetracycline

摘要:: 羟基磷酸铜（Cu2(OH)PO4）作为一种可见光光催化剂引起了广泛的关注。为了拓宽其可见光响应范围和提高光生载流子分离效率，设计并制备了Cu2(OH)PO4-CdS异质结。首先通过水热法合成了形貌均匀的核桃状Cu2(OH)PO4，其宽度约为4 μm、长度约为6 μm。随后利用超声法在Cu2(OH)PO4表面原位生长了一些CdS纳米颗粒，直径约为25 nm。在可见光（λ>400 nm）下照射100 min后，Cu2(OH)PO4CdS对亚甲基蓝（MB）和四环素（TC）的降解效率分别为82%和78%，其催化性能显著优于单一材料。此外，循环降解实验表明Cu2(OH)PO4CdS具有良好的稳定性。因此，Cu2(OH)PO4-CdS异质结有望成为一种高效、稳定的可见光光催化剂并用于废水净化。

Abstract:: Copper hydroxyphosphate (Cu2(OH)PO4) has drawn extensive attention as an efficient visible-light-driven (VLD) photocatalyst in recent years. To further improve its photoabsorption range and photogenerated electron-hole separation efficiency, we designed and prepared Cu2(OH)PO4-CdS heterojunctions. The walnut-like Cu2(OH)PO4 with a width of ~4 μm and length of ~6 μm was synthesized by hydrothermal method at first, and then CdS nanoparticles with diameter of 25 nm were grown on the surface of Cu2(OH)PO4 by ultrasonic method. The photocatalytic activity of Cu2(OH)PO4-CdS heterojunctions were measured by the degradation of methylene blue (MB) and tetracycline (TC) solution under visible-light irradiation (λ>400 nm). The results indicated that Cu2(OH)PO4-CdS heterojunctions could degrade 82% MB or 78% TC in 100 minutes under visible-light irradiation, which is more efficient than those individual component (Cu2(OH)PO4 or CdS). In addition, the recycling experiment demonstrated that the heterojunctions remained good photocatalytic stability. Therefore, Cu2(OH)PO4-CdS was expected to be a stable and efficient VLD photocatalyst for the purification of wastewater.