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Porous boron nitride for CO2 capture and photoreduction_121018_Final_InclSI.pdf (1.68 MB)
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Porous Boron Nitride for Combined CO2 Capture and Photoreduction

preprint
submitted on 12.10.2018 and posted on 15.10.2018 by Ravi Shankar, Anna Hankin, Camille Petit

Porous and amorphous materials are typically not employed for photocatalytic purposes as their high number of defects can lead to low charge mobility and favour bulk electron-hole recombination. Yet, with a disordered nature can come porosity, which in turns promotes catalyst/reactant interactions and fast charge transfer to reactants. Here, we demonstrate that moving from h-BN, a well-known crystalline insulator to amorphous BN, we create a semiconductor, which is able to photoreduce CO2 in a gas/solid phase, under both UV-vis and pure visible light, ambient conditions, without the need for cocatalysts. The material selectively produces CO and maintains its photocatalytic stability over several catalytic cycles. The performance of this un-optimised material is on par with that of TiO2, the benchmark in the field. Owing to the chemical and structural tuneablity of porous BN, these findings highlights the potential of porous BN-based structure for photocatalysis and particularly solar fuels production.

History

Email Address of Submitting Author

camille.petit@imperial.ac.uk

Institution

Imperial College London

Country

United Kingdom

ORCID For Submitting Author

0000-0002-3722-7984

Declaration of Conflict of Interest

The authors declare that there are no competing financial interests.

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in Journal of Materials Chemistry A

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