Band structure engineering of carbon nitride hybrid photocatalysts for CO₂ reduction in aqueous solutions

Piercy, Verity L, Neri, Gaia, Manning, Troy D ORCID: 0000-0002-7624-4306, Pugliese, Andrea, Blanc, Frederic ORCID: 0000-0001-9171-1454, Palgrave, Robert G, Cowan, Alexander J ORCID: 0000-0001-9032-3548 and Rosseinsky, Matthew J ORCID: 0000-0002-1910-2483 (2023) Band structure engineering of carbon nitride hybrid photocatalysts for CO₂ reduction in aqueous solutions JOURNAL OF MATERIALS CHEMISTRY A, 11 (34). pp. 18356-18364. ISSN 2050-7488, 2050-7496

Access the full-text of this item by clicking on the Open Access link.

Abstract

Through the co-polymerisation of dicyandiamide and barbituric acid precursors, a series of visible light active carbon nitride photocatalysts has been prepared and characterized, and their photocatalytic activity has been evaluated. Structural and electronic characterisation has enabled variations in observed activity towards water splitting and CO<inf>2</inf> reduction to be understood, both in the presence and absence of the iron porphyrin co-catalyst Feⁱⁱⁱ tetra(4-carboxylphenyl)porphyrin (FeTCPP). A combination of the most active carbon nitride catalyst using 5 wt% barbituric acid and FeTCPP provides a hybrid system where the alignment of band structure with appropriate reduction potentials and enhanced carrier lifetimes is capable of CO<inf>2</inf> reduction in an aqueous solution with >60% selectivity for CO production. This study is one of only a few that achieves selective CO<inf>2</inf> reduction using a hybrid molecular catalyst-carbon nitride photocatalyst in aqueous solution.

Item Type:	Article
Uncontrolled Keywords:	34 Chemical Sciences, 3406 Physical Chemistry, 40 Engineering, 4004 Chemical Engineering, 4018 Nanotechnology
Divisions:	Faculty of Science & Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	26 Sep 2023 15:53
Last Modified:	16 Jun 2026 11:28
DOI:	10.1039/d3ta02872k
Open Access URL:	https://doi.org/10.1039/D3TA02872K
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3173093
Disclaimer:	The University of Liverpool is not responsible for content contained on other websites from links within repository metadata. Please contact us if you notice anything that appears incorrect or inappropriate.