Doping-induced structural evolution from rutile to anatase: formation of Nb-doped anatase TiO2 nanosheets with high photocatalytic activity. Issue 18 (12th November 2015)

• Record Type: Journal Article
• Authors: Wang, Hsin-Yi; Chen, Jiazang; Xiao, Fang-Xing; Zheng, Jianwei; Liu, Bin
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 18(2016)
• Page Start: 6926
• Page End: 6932
• Publication Date: 2015-11-12
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5ta08202a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Semiconductor nanostructures with specially exposed reactive crystal facets are promising to promote photocatalytic/photoelectrochemical reactions. Abstract : Semiconductor nanostructures with specially exposed reactive crystal facets are promising to promote photocatalytic/photoelectrochemical reactions. Here, we demonstrate that the introduction of niobium into TiO2 can modify TiO2 surface chemistry, which in turn influences the growth of TiO2 nanostructures from one-dimensional rutile nanorods at a low niobium doping concentration to two-dimensional anatase nanosheets at a high niobium doping concentration. Additionally, the electronic structure, optical properties, and surface activity for O2 adsorption are substantially influenced for Nb-doped TiO2 by electron donation from the niobium dopant, which significantly enhances the light-induced generation of super oxide radicals (O2 − ˙), and thus improves the photocatalytic activity of Nb-doped TiO2 .