Enhanced photocatalytic activities on Bi2O2CO3/ZnWO4 nanocomposites. Issue 5 (27th February 2014)

• Record Type: Journal Article
• Authors: Tian, Na; Huang, Hongwei; Zhang, Yihe; He, Ying
• Is Part Of: Journal of materials research. Volume 29:Issue 5(2014)
• Page Start: 641
• Page End: 648
• Publication Date: 2014-02-27
• Subjects: Bi2O2CO3/ZnWO4 composite, -- photoinduced charge transfer, -- methylene blue (MB), -- photocatalyst; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1557/jmr.2014.29
• Languages: English
• ISSNs: 0884-2914

Abstract

Abstract: Abstract : Bi2 O2 CO3 /ZnWO4 composite photocatalysts have been successfully synthesized by a mixed calcination method after hydrothermal process. The catalysts were characterized by powder x-ray diffraction, scanning electron microscopy, transmission electron microscopy, high resolution transmission electron microscopy, x-ray photoelectron spectroscopy, and UV-vis diffuse reflectance spectrum. The results showed that the hierarchical Bi2 O2 CO3 /ZnWO4 nanocomposites were obtained by mixed grinding calcination method and Bi2 O2 CO3 nanospheres grow on the primary ZnWO4 particles. The Bi2 O2 CO3 /ZnWO4 composites exhibit higher photocatalytic activities compared to pure ZnWO4 and Bi2 O2 CO3 particles under UV light irradiation. Furthermore, the excellent photocatalytic efficiency of the Bi2 O2 CO3 /ZnWO4 composite was deduced closely related to Bi2 O2 CO3 /ZnWO4 heterojunctions whose presence is generally regarded to be a favorable factor for the separation of photogenerated electrons and holes.