The effect of crystal facets and induced porosity on the performance of monoclinic BiVO4 for the enhanced visible-light driven photocatalytic abatement of methylene blue

Iqrash Shafiq, Murid Hussain, Nasir Shehzad, Ibrahim M. Maafa, Parveen Akhter, Um E.Salma Amjad, Sumeer Shafique, Abdul Razzaq, Wenshu Yang, Muhammad Tahir, Nunzio Russo

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

In this study, a unique two-step approach has been developed to synthesize mesoporous BiVO4 (m-BiVO4) photocatalysts. The synthesized photocatalysts were characterized by means of XRD, SEM, EDS, UV-vis, Raman, PL, DRS, and N2-physiosorption analysis techniques. The hybrid BiVO4/KIT-6 composite and m-BiVO4 particles exhibited selective growth of the (040) crystal facet, a smaller size, high surface areas, a large pore volume as a result of the porosity induced by KIT-6 and, a greater number of active sites. The charge recombination rate of m-BiVO4 was remarkably lower than that of conventional BiVO4. In addition, the bandgap energy of m-BiVO4 was 2.2eV, which is suitable for visible light irradiation. It was observed that the photocatalytic activity of m-BiVO4 was superior to that of conventional BiVO4 under visible-light illumination, due to the synergistic effect of the highly active monoclinic phase and large surface area of m-BiVO4. Furthermore, the monoclinic m-BiVO4 was also tested for photocatalytic degradation ability by using an anonymous industrial effluent for 3 h under visible light irradiation.

Original languageEnglish
Article number103265
JournalJournal of Environmental Chemical Engineering
Volume7
Issue number4
DOIs
Publication statusPublished - Aug 2019
Externally publishedYes

Keywords

  • Dye degradation
  • Mesoporous BiVO
  • Mesoporous silica (KIT-6)
  • Monoclinic phase

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Pollution
  • Process Chemistry and Technology

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