Highly Conjugated Graphitic Carbon Nitride Nanofoam for Photocatalytic Hydrogen Evolution

As a metal-free photocatalyst, graphitic carbon nitride (g-CN) shows great potential for photocatalytic water splitting, although its performance is significantly limited by structural defects due to incomplete polymerization. In the present work, we successfully synthesize highly conjugated g-CN na...

Full description

Saved in:
Bibliographic Details
Published inLangmuir Vol. 38; no. 4; pp. 1471 - 1478
Main Authors Cheng, Chuan-Qi, Feng, Yi, Shi, Zi-Zheng, Zhou, Yun-Long, Kang, Wen-Jing, Li, Zhe, Mao, Jing, Shen, Gu-Rong, Dong, Cun-Ku, Liu, Hui, Du, Xi-Wen
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 01.02.2022
Subjects
carbon nitride
graphene
hydrogen production
irradiation
light
photocatalysis
photocatalysts
polymerization
surface area
Online AccessGet full text

Cover

More Information
Summary:As a metal-free photocatalyst, graphitic carbon nitride (g-CN) shows great potential for photocatalytic water splitting, although its performance is significantly limited by structural defects due to incomplete polymerization. In the present work, we successfully synthesize highly conjugated g-CN nanofoam through an iodide substitution technique. The product possesses a high polymerization degree, low defect density, and large specific surface area; as a result, it achieves a hydrogen evolution rate of 9.06 mmol h–1 g–1 under visible light irradiation, with an apparent quantum efficiency (AQE) of 18.9% at 420 nm. Experimental analysis and theoretical calculations demonstrate that the recombination of photogenerated carriers at C–NH x defects was effectively depressed in the nanofoam, giving rise to the high photocatalytic activity.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0743-7463
1520-5827
1520-5827
DOI:10.1021/acs.langmuir.1c02716