Nanocellulose-derived carbon/g-C3N4 heterojunction with a hybrid electron transfer pathway for highly photocatalytic hydrogen peroxide production

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:599

Article

Shan, Yiwei¹  Guo, Ying¹  Wang, Yu¹  Du, Xiran¹  Yu, Jun¹  Luo, Hao¹  Wu, Hui¹  Boury, Bruno²  Xiao, He¹  Huang, Liulian¹  Chen, Lihui¹ 

[1] Fujian Agr & Forestry Univ, Coll Mat Engn, Fuzhou 350108, Peoples R China

[2] Univ Montpellier, ENSCM, CNRS, ICGM, Montpellier, France

关键词: Cellulose nanofibers;    Photocatalysis;    Carbon nitride;    Hydrogen peroxide production;    Carbon fibers;   

DOI  :  10.1016/j.jcis.2021.04.111

来源: Elsevier

【 摘 要 】

Using oxygen reduction for the photocatalytic production of hydrogen peroxide (H2O2) has been considered a green and sustainable route. In the present study, to achieve high efficiency, graphitic carbon nitride (g-C3N4) was obtained using thermal polymerization from a bi-component precursor and was then assembled with cellulose nanofibers. It was found that a small quantity of cellulose nanofibers that generates carbon fibers upon pyrolysis greatly improves the photocatalytic activity compared with that of g-C3N4 alone. The well-defined carbon/g-C3N4 heterojunction-type material exhibits as high as 1.10 mmol L(-1)h(-1) of photo-production of H2O2 under visible light, which is 4.2 times higher than that yielded by pristine g-C3N4 from a single precursor. A comprehensive characterization of the photocatalyst enables us to delineate the effect of the carbon nanofiber with respect to porosity, electron-hole separation, band gap regulation, and especially the electron transfer pathway. Our results demonstrate that nanocellulose-derived carbon, when precisely assembled with other functional material such as a photocatalyst, is a promising promoter of their activity. Crown Copyright (C) 2021 Published by Elsevier Inc. All rights reserved.

【 授权许可】

Free