A C3N4/Bi2WO6 organic–inorganic hybrid photocatalyst with a high visible-light-driven photocatalytic activity. Issue 6 (28th March 2016)

• Record Type: Journal Article
• Authors: Wang, Meng; Fang, Minghao; Tang, Chao; Zhang, Lina; Huang, Zhaohui; Liu, Yan'gai; Wu, Xiaowen
• Is Part Of: Journal of materials research. Volume 31:Issue 6(2016)
• Page Start: 713
• Page End: 720
• Publication Date: 2016-03-28
• Subjects: photocatalyst, -- heterojunction, -- C3N4, -- Bi2WO6; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1557/jmr.2016.72
• Languages: English
• ISSNs: 0884-2914

Abstract

Abstract: Abstract : C3 N4 /Bi2 WO6 heterojunction photocatalysts were successfully synthesized using consecutive hydrothermal and calcination processes. These photocatalysts were characterized using x-ray diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible diffuse reflectance spectroscopy, x-ray photoelectron spectroscopy, and photoluminescence measurements. The results of these measurements indicated that the Bi2 WO6 nanoparticles were approximately 30–50 nm and uniformly distributed on the surface of C3 N4 lamellar structures. The 20% C3 N4 /Bi2 WO6 displayed enhanced visible-light absorption from 432 nm to 468 nm. Photocatalytic tests also revealed that the 20% C3 N4 /Bi2 WO6 photocatalyst exhibited significantly enhanced photocatalytic activity compared to that of pure C3 N4 and Bi2 WO6 under irradiation by visible light (λ > 420 nm). Furthermore, the excellent photocatalytic efficiency of the 20% C3 N4 /Bi2 WO6 photocatalyst was determined to be related to the formation of C3 N4 /Bi2 WO6 heterojunctions, and their presence was found to be generally beneficial for the separation of photogenerated electron–hole pairs.