4.6 Article

TiO2/BiVO4 composite from preformed nanoparticles for heterogeneous photocatalysis

期刊

MATERIALS CHEMISTRY AND PHYSICS
卷 290, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2022.126588

关键词

Composite; Titanium dioxide; Bismuth vanadate; Interface; Photodegradation

资金

  1. Coordination for the Improvement of Higher Education Personnel-Brazil (CAPES) [001]
  2. CAPES/DS
  3. FAPESP (Sao Paulo Research Foundation) [2018/01258-5]
  4. CNPq (Brazilian National Council for Scientific and Technological Development) [442575/2019-0, 468956/2014-0, 409904/2016-3]
  5. FINEP (Financier of Studies and Projects) [01.17.0021.00]

向作者/读者索取更多资源

This paper studied the synthesis of a heterostructure consisting of BiVO4 and TiO2 for photocatalytic application. The heterostructures were synthesized using the building blocks technique with different TiO2/BiVO4 molar ratios under hydrothermal treatment. The as-synthesized samples exhibited higher photocatalytic efficiency due to the separation of the photogenerated charges.
Heteroaggregation of preformed nanocrystals used as building blocks is an interesting approach for the synthesis of heterostructures since it is possible to retain the main surface characteristics of the materials. In this paper, we studied the synthesis of a heterostructure consisting of monoclinic BiVO4 and anatase TiO2 phase for photo -catalytic application. The heterostructures were synthesized using the building blocks technique with different TiO2/BiVO4 molar ratios under hydrothermal treatment. The effectiveness of heteroaggregations formation results in more photoactive catalysts due to the possibility of electron transfer between the materials. Methylene Blue (MB) solutions were decolorized under ultraviolet and visible radiation to evaluate the samples' photo -catalytic activity. As a result, the as-synthesized samples presented higher photocatalytic efficiency than pristine anatase TiO2 and m-BiVO4 precursors. The increase of the photocatalytic properties is mainly attributed to the separation of the photogenerated charges, which is the central feature of heterostructures formed due to the collision of the particles during hydrothermal treatment.

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