Balancing the crystallinity and specific surface area of bismuth tungstate for photocatalytic water oxidation

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journal

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Original languageEnglish
Article number110887
Journal / PublicationMolecular Catalysis
Volume487
Online published18 Mar 2020
Publication statusPublished - May 2020

Abstract

Crystallinity and specific surface area of a photocatalyst are two important factors in determining the ultimate photocatalytic performances. In this work, hierarchical bismuth tungstate (Bi2WO6) microspheres with modulations in crystallinity and surface area were carefully synthesised using hydrothermal method with a subsequent calcination treatment. Comparison of activities in photocatalytic water splitting was performed systematically to understand the role of each factor. While larger surface area is in general perceived to provide more active sites for reactions, it was found in this work that crystallinity which governs the photoexcited charge transportation has a more profound impact in influencing the photocatalytic water oxidation. These findings should be applicable to other powder type photocatalytic materials.

Research Area(s)

  • Bismuth tungstate, Crystallinity, O2evolution, Surface area, Water oxidation