A Templated Method to Bi2WO6 Hollow Microspheres and Their Conversion to Double-Shell Bi2O3/Bi2WO6 Hollow Microspheres with Improved P

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• 作者：Xiaona Li ; Renkun Huang ; Yanhua Hu ; Yongjuan Chen ; Wenjun Liu ; Rusheng Yuan ; Zhaohui Li
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：June 4, 2012
• 年：2012
• 卷：51
• 期：11
• 页码：6245-6250
• 全文大小：299K
• 年卷期：v.51,no.11(June 4, 2012)
• ISSN：1520-510X

文摘

Bi₂WO₆ hollow microspheres with dimension of ca. 1.5 渭m were synthesized via a hydrothermal method using polystyrene particles as the template. The as-prepared Bi₂WO₆ hollow microspheres can be further transformed to double-shell Bi₂O₃/Bi₂WO₆ hollow microspheres. The samples were fully characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, N₂-sorption Brunauer鈥揈mmett鈥揟eller surface area, UV鈥搗is diffuse-reflectance spectroscopy, and X-ray photoelectron spectroscopy. The as-formed double-shell Bi₂O₃/Bi₂WO₆ hollow microspheres exhibit enhanced photocatalytic activity due to the hollow nature and formation of the p鈥搉 junction between p-type Bi₂O₃ and n-type Bi₂WO₆. The study provides a general and effective method in the fabrication of composition and dimension-tunable composite hollow microspheres with sound heterojunctions that may show a variety of applications.