J Mater Sci Technol ›› 2011, Vol. 27 ›› Issue (4): 289-295.

• Nanomaterials and Nanotechnology •     Next Articles

Microwave Synthesis of Cuprous Oxide Micro-/Nanocrystals with Different Morphologies and Photocatalytic Activities

Qingwei Zhu, Yihe Zhang, Jiajun Wang, Fengshan Zhou, Paul K. Chu   

  1. 1) State Key Laboratory of Geological Processes & Mineral Resources, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China
    2) Department of Powder Metallurgy and Special Materials, General Research Institute of Non-Ferrous Metal, Beijing 100088, China
    3) Department of Physics & Materials Science, City University of Hong Kong, Tat Chee Avenue, Kowloon, ong Kong, China
  • Received:2010-09-21 Revised:2010-12-13 Online:2011-04-28 Published:2011-04-28
  • Contact: Yihe Zhang
  • Supported by:

    the open foundation of National Laboratory of Mineral Materials of China University of Geosciences

Abstract: Cuprous oxide micro-/nanocrystals were synthesized by using a simple liquid phase reduction process under microwave rradiation. Copper sulfate was used as the starting materials and macromolecule surfactants served as the templates. The morphologies phase and optical properties of them are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and ultraviolet-visible diffuse reflection absorptive spectra (UV-vis/DRS), respectively. The crystals had four different shapes, namely spheres, strips, octahedrons, and dandelions. The photocatalytic behavior of the cuprous oxide particles were investigated by monitoring the degradation of rhodamine B. In spite of the different morphologies, all of the cuprous oxide micro-/nanocrystals exhibited photocatalytic activities under visible light irradiation in the following order: dandelions, strips, spheres, and octahedral crystals. The photocatalytic degradation rates of rhodamine B are 56.37%, 55.68%, 51.83% and 46.16%, respectively. The morphology affects significantly the photocatalytic performance.

Key words: Cuprous oxide, Synthesis, Morphology, Photocatalytsis