Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Synthesis and Visible-Light Photocatalytic Property of Bi2WO6 Hierarchical Octahedron-Like Structures | Nanoscale Res Lett 2008 3 365-371 DOI s11671-008-9168-7 NANO EXPRESS Synthesis and Visible-Light Photocatalytic Property of Bi2WO6 Hierarchical Octahedron-Like Structures Yuanyuan Li Jinping Liu Xintang Huang Received 8 August 2008 Accepted 2 September 2008 Published online 19 September 2008 to the authors 2008 Abstract A novel octahedron-like hierarchical structure of Bi2WO6 has been fabricated by a facile hydrothermal method in high quantity. XRD SEM TEM and HRTEM were used to characterize the product. The results indicated that this kind of Bi2WO6 crystals had an average size of 4 m constructed by quasi-square single-crystal nanosheets assembled in a special fashion. The formation of octahedron-like hierarchical structure of Bi2WO6 depended crucially on the pH value of the precursor suspensions. The photocatalytic activity of the hierarchical Bi2WO6 structures toward RhB degradation under visible light was investigated and it was found to be significantly better than that of the sample fabricated by SSR. The better photo-catalytic property should be strongly associated with the high specific surface area and the abundant pore structure of the hierarchical octahedron-like Bi2WO6. Keywords Nanostructure Photodegradation Optical absorption Introduction Since the discovery of photoelectrochemical water splitting at a semiconductor surface in 1972 great progress has been made in the research of photocatalytic degradation of organic pollutants for solving environmental problems that confront mankind today. Photocatalysis has many Y. Li J. Liu X. Huang Department of Physics Central China Normal University Wuhan 430079 Hubei People s Republic of China e-mail lancyle@ X. Huang e-mail xthuang@ advantages over other treatment methods for instance the use of the environmentally friendly oxidant O2 the easy reaction performed at room temperature and oxidation of the organic compounds even at low concentrations 1-3 . Much work on .
