Efficient photocatalytic fixation of N2 by KOH-treated g-C3N4

Li, Xiaoman, Sun, Xiang, Zhang, Ling, Sun, Songmei and Wang, Wenzhong 2018. Efficient photocatalytic fixation of N2 by KOH-treated g-C3N4. Journal of Materials Chemistry A 6 (7) , pp. 3005-3011. 10.1039/c7ta09762j

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Abstract

Development of N2 photofixation under mild conditions is challenging; one reason for low efficiency is the poor reactivity between water and photocatalysts. Herein, C3N4 after KOH etching was used as an efficient photocatalyst, and CH3OH was first introduced as a proton source. The photocatalyst presented a high ammonia evolution rate of 3.632 mmol g−1 h−1 and achieved an apparent quantum yield of 21.5% at ∼420 nm. In addition to the role of reacting with holes to accelerate the production and transfer of electrons, CH3OH also promoted the solubility of N2 and provided a proton to the activated N2. The CH3OH system should be instructive for a better understanding of proton-enhanced photocatalysis.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry
Publisher:	Royal Society of Chemistry
ISSN:	2050-7488
Date of First Compliant Deposit:	22 May 2019
Date of Acceptance:	9 January 2018
Last Modified:	30 Nov 2024 07:30
URI:	https://orca.cardiff.ac.uk/id/eprint/122009

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