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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Facile one-pot microwave-assisted synthesis of tungsten-doped BiVO4/WO3 heterojunctions with enhanced photocatalytic activity

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Author(s):
Claudino, Caroline H. [1] ; Kuznetsova, Maria [1] ; Rodrigues, Barbara S. [1] ; Chen, Changqiang [2] ; Wang, Zhiyu [2] ; Sardela, Mauro [2] ; Souza, Juliana S. [1]
Total Authors: 7
Affiliation:
[1] Univ Fed ABC, Ctr Ciencias Nat & Humans, BR-09210580 Santo Andre, SP - Brazil
[2] Univ Illinois, Mat Res Lab, 104 S Goodwin Ave, Urbana, IL 61801 - USA
Total Affiliations: 2
Document type: Journal article
Source: Materials Research Bulletin; v. 125, MAY 2020.
Web of Science Citations: 0
Abstract

Bismuth vanadate (BiVO4) is considered one of the most successful candidates to be used as photoanode for solar-to-hydrogen conversion. However, its relatively high recombination rates and considered low long-term stability limits its applicability. Doping BiVO4 with tungsten and developing heterojunctions with inorganic perovskites has emerged as strategies to overcome these issues. However, the development of these materials requires plenty of time and energy. Here, we reported the development of a new synthetic method to prepare heterojunctions of tungsten-doped bismuth vanadate (using 1, 3 and 5 % in mass of W) and tungsten oxide. The heterojunctions were prepared in a one-pot microwave-assisted method that takes only 24 min. Photocatalytic efficiency was determined through quantification of the amount of hydroxyl radical, generated by the catalysts when they are irradiated with simulated sunlight, and through photoelectrochemical experiments. The heterojunctions showed enhanced photocatalytic activity, which was ascribed to the adequate alignment of the band edges potentials of the semiconductors. Also, the tungsten doping decreases the recombination rates. Both effects increase the photogenerated charges lifetime. (AU)

FAPESP's process: 17/11395-7 - Microwave-assisted synthesis of metal oxides semiconductors heterojunctions with photocatalytic applications
Grantee:Juliana dos Santos de Souza Silva
Support Opportunities: Regular Research Grants
FAPESP's process: 17/26633-0 - Microwave-assisted synthesis of bismuth vanadate and tungsten oxide nanostructures with application in photoelectrochemical water splitting
Grantee:Bárbara Scola Rodrigues
Support Opportunities: Scholarships in Brazil - Master