Cu2（OH）PO4-CdS异质结的合成及其光催化性能研究  

Synthesis and Photocatalytic Properties of Cu2（ OH） PO4-Cd S Heterojunctions with Visible-Light Response

作　　者：陈燕 沈晓凤 金嫣 张丽莎[2] 陈志钢[1] CHEN Yan;SHEN Xiaofeng;JIN Yan;ZHANG Lisha;CHEN Zhigang(State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China)

机构地区：[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

出　　处：《中国材料进展》2019年第8期793-799,共7页Materials China

基　　金：国家自然科学基金项目(51473033,51773036,21477019);东华大学中央高校基本科研业务费专项资金和“励志计划”资助

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4μm、长度约为6μm。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25nm。在可见光(λ>400nm)下照射100min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。Copper hydroxyphosphate (Cu 2 (OH)PO 4 ) 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 Cu 2 (OH)PO 4 -CdS heterojunctions. The walnut-like Cu 2 (OH)PO 4 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 Cu 2 (OH)PO 4 by ultrasonic method. The photocatalytic activity of Cu 2 (OH)PO 4 -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 Cu 2 (OH)PO 4 -CdS heterojunctions could degrade 82% MB or 78% TC in 100 minutes under visible-light irradiation, which is more efficient than those individual component (Cu 2 (OH)PO 4 or CdS). In addition, the recycling experiment demonstrated that the heterojunctions remained good photocatalytic stability. Therefore, Cu 2 (OH)PO 4 -CdS was expected to be a stable and efficient VLD photocatalyst for the purification of wastewater.

关 键 词：羟基磷酸铜 硫化镉 异质结 光催化 亚甲基蓝 四环素 

分 类 号：TQ174[化学工程—陶瓷工业]