物理化学学报 >> 2009, Vol. 25 >> Issue (09): 1841-1846.doi: 10.3866/PKU.WHXB20090904

研究论文 上一篇    下一篇

花状Cu2O/Cu的水热合成及其光催化性能

周波, 刘志国, 王红霞, 黄喜强, 隋郁, 王先杰, 吕喆, 苏文辉   

  1. 哈尔滨工业大学物理系凝聚态物理科学与技术研究中心, 哈尔滨 150080|哈尔滨师范大学化学化工学院, 哈尔滨 150025
  • 收稿日期:2009-04-21 修回日期:2009-06-08 发布日期:2009-09-03
  • 通讯作者: 刘志国 E-mail:liuzhiguo@hit.edu.cn

Hydrothermal Preparation and Visible Photocatalytic Activity of Flower-Like Cu2O/Cu Nanocomposites

ZHOU Bo, LIU Zhi-Guo, WANG Hong-Xia, HUANG Xi-Qiang, SUI Yu, WANG Xian-Jie, LV Zhe, SU Wen-Hui   

  1. Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150080, P. R. China|College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin 150025, P. R. China
  • Received:2009-04-21 Revised:2009-06-08 Published:2009-09-03
  • Contact: LIU Zhi-Guo E-mail:liuzhiguo@hit.edu.cn

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摘要：

以硝酸铜为前驱体, 不采用任何模板, 通过逐步水热法合成了花状Cu2O/Cu复合纳米材料. 用扫描电镜(SEM)、X射线衍射(XRD)和紫外-可见漫反射光谱(DRS)对样品进行表征. 结果表明, 花状纳米Cu2O/Cu材料是由长为300-500 nm, 宽为30-70 nm的带状花瓣构成, 在可见光区域有很强的吸收. 复合材料中Cu的含量可以通过反应时间进行调控. 对染料Procion Red MX-5B(PR)的可见光催化降解, Cu能明显提高Cu2O的光催化性能. 当Cu质量分数为27%-71%时, 复合材料Cu2O/Cu的催化活性明显高于单相Cu2O. 与立方体形貌的Cu2O/Cu复合材料相比, 花状纳米Cu2O/Cu复合材料对染料PR有更高的催化降解性能. 且该复合材料有较高的循环回收利用率.

关键词: 光催化, Cu2O/Cu, 异质结, 纳米花, Procion Red MX-5B

Abstract:

Novel Cu2O/Cu nanocomposites with a flower-like nanoarchitecture were prepared by a facile template-free two-step hydrothermal synthesis route using Cu(NO3)2·3H2O as a precursor. Their properties were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflection spectroscopy (DRS), and scanning electron microscopy (SEM). The flower-like Cu2O/Cu nanocomposites consist of many nanopetals with lengths of 300-500 nm and widths of 30-70 nm. They show strong absorption for visible light. The content of Cu in the composites could be easily controlled by adjusting the hydrothermal time. As photocatalysts, the composites exhibit much higher photocatalytic activity than Cu2O for the photodegradation of Procion Red MX-5B (PR) under visible light illumination when the mass fraction of Cu lies between 27% and 71%. Moreover, flower-like Cu2O/Cu nanocomposites show better performance for the photodegradation of PR than cubic composites. The synthesized composites can also be recycled for further use.

Key words: Photocatalysis, Cu2O/Cu, Heterostructure, Nanoflower, Procion Red MX-5B

MSC2000: 

  • O643.3