Bi2Se3, Bi2Te3 quantum dots-sensitized rutile TiO2 nanorod arrays for enhanced solar photoelectrocatalysis in azo dye degradation. (12th November 2020)

• Record Type: Journal Article
• Authors: Zhou, Guanda; Zhao, Ting; Wang, Oumin; Xia, Xin; Pan, Jia Hong
• Is Part Of: JPhys energy. Volume 3:Number 1(2021)
• Publication Date: 2020-11-12
• Subjects: semiconductor photoelectrocatalysis -- hydrothermal process -- rutile TiO2 -- V2VI3 chalcogenide quantum dots -- dye degradation -- topographic insulator; Power resources -- Research -- Periodicals; Power resources -- Periodicals; 333.79
• DOI: 10.1088/2515-7655/abc52c
• Languages: English
• ISSNs: 2515-7655

Abstract

Abstract: Rutile TiO2 nanorod arrays vertically aligned on conductive fluorine-doped tin oxide glass are optimized for photocatalysis in terms of the density and diameter of nanorods by tuning the concentration of Ti precursor and reaction time during the hydrothermal process. Quantum dots (QDs) of V2 VI3 ( V = Bi; VI = Se, Te) topographic insulators are then employed as sensitizers to enhance the visible-light response of TiO2 . Electrochemical measurements show that the decoration of Bi2 Se3 or Bi2 Te3 significantly increases the photocurrent due to the enhanced light harvesting properties and the charge carrier separation capability mediated by the topographic isolation effect of V2 VI3 QDs. Photoelectrocatalytic (PEC) activity evaluation is conducted towards the decoloration of azo dyes, including methyl orange and methylene blue under the sunlight irradiation. The elaborated Bi2 Se3 /TiO2 nanorod array exhibits the superior PEC performances, presenting shows great potentials in environmental remediation.