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Enhancement of photocatalytic hydrogen evolution with catalysts based on carbonized MOF-5 and g-C3N4

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Abstract

The study presents enhancement of photocatalytic hydrogen generation after metal–organic framework (MOF5) carbonization at 700 °C and its utilization as a co-catalyst of graphitic carbon nitride (gCN). Thermal treatment of MOF5 affected the formation of ZnO nanoparticles which played the role of co-catalyst for H2 evolution. Moreover, significant band-gap narrowing of MOF5 was observed, which also affected the narrowing of the hybrid band gap. The appropriate conduction band position of the carbonized MOF allowed photogenerated electron transfer from gCN to the carbonized MOF, hence, improving the separation of the charge carriers and reducing the overpotential for H2 generation. The mechanism of the photocatalytic process was also discussed.

Graphical abstract: Enhancement of photocatalytic hydrogen evolution with catalysts based on carbonized MOF-5 and g-C3N4

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Supplementary files

Article information


Submitted
14 Oct 2019
Accepted
20 Dec 2019
First published
24 Jan 2020

This article is Open Access

RSC Adv., 2020,10, 4032-4039
Article type
Paper

Enhancement of photocatalytic hydrogen evolution with catalysts based on carbonized MOF-5 and g-C3N4

M. Aleksandrzak, K. Sielicki and E. Mijowska, RSC Adv., 2020, 10, 4032
DOI: 10.1039/C9RA08388J

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