A Ternplated Method to Bi2WO6 Hollow Microspheres and Their Conversion to Double-Shell Bi2O3/Bi2WO6 Hollow Microspheres with Improved Photocatalytic Performance

作者：Li, Xiaona; Huang, Renkun; Hu, Yanhua; Chen, Yongjuan; Liu, Wenjun; Yuan, Rusheng; Li, Zhaohui^*

来源：Inorganic Chemistry, 2012, 51(11): 6245-6250.

DOI：10.1021/ic300454q

• HYDROTHERMAL SYNTHESIS
• ZINC-OXIDE
• PARTICLES
• SPHERES
• DEGRADATION
• FABRICATION
• COMPOSITE
• TEMPLATE
• SILICA

Bi2WO6 hollow microspheres with dimension of ca. 1.5 mu 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, N-2-sorption Brunauer-Emmett-Teller surface area, UV-vis 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-n 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.

• 出版日期2012-6-4
• 单位福州大学