4.6 Article

Boron Nitride-Titania Mesoporous Film Heterostructures

Journal

LANGMUIR
Volume 37, Issue 17, Pages 5348-5355

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.1c00460

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Funding

  1. Programma Operativo Nazionale (PON) Ricerca e Innovazione 2014-2020-Linea 1
  2. Italian Ministry of Foreign Affairs and International Cooperation (MAECI) through Cooperation Project GINGSENG between Italy and China [PGR05249]

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This study successfully integrated hexagonal boron nitride (BN) nanosheets into titania mesoporous films using a template-assisted sol-gel synthesis and evaporation-induced self-assembly, and investigated the role of defects in heterostructure properties. It was found that defects enhance the photocatalytic response of the film.
The fabrication of optically active heterostructures in the shape of mesostructured thin films is a highly challenging task. It requires an integrated process to allow in one-step incorporating the two-dimensional materials within the mesoporous ordered host without disrupting the pore organization. Hexagonal boron nitride (BN) nanosheets have been successfully introduced into titania mesoporous films using a template-assisted sol-gel synthesis and evaporation-induced self-assembly. Two types of BN sheets have been used, with and without defects, to investigate the role of defects in heterostructure properties. It has been found that the defects increase the ultraviolet radiation A (UVA) absorbance and enhance the photocatalytic response of the film. The BN sheets are optically transparent and do not exhibit any photocatalytic property but contribute to anatase crystallization via heterogeneous nucleation.

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