A general steam-assisted method for one-step synthesis of polymeric carbon nitride nanosheets with/without doping for efficient photocatalytic hydrogen evolution

Autor:	Zhengliang Zhao, Xiang Hu, Yigen Tan, Zhu Shu, Jieyu Chen, Jun Zhou, Tiantian Li, Donghang Chen, Wenbin Wang
Rok vydání:	2020
Předmět:	chemistry.chemical_compound Materials science chemistry Chemical engineering Specific surface area Green gas Doping Photocatalysis General Materials Science One-Step Charge carrier Hydrogen evolution Carbon nitride
Zdroj:	Nanoscale. 12:1939-1947
ISSN:	2040-3372 2040-3364
Popis:	Nano-structuring of polymeric carbon nitride (PCN) is an important strategy to improve its photocatalytic performance, while facile and green methods are scarce yet. Herein, we proposed a novel steam-assisted method to prepare holey PCN nanosheets in one step. Only a green gas template, i.e. steam, decomposed from the recyclable steam source Mg(OH)2 is needed for PCN nano-structuring. Moreover, in situ element doping of nano-structured PCN can be synchronously realized via this method. The holey PCN nanosheets and doped counterparts have boosted visible-light photocatalytic H2 evolution activities 12-35 times that of bulk PCN, benefitting from enlarged specific surface area, suppressed photogenerated electron-hole recombination and prolonged charge carrier lifetime. Steam-assisting may be a useful strategy for the facile and green synthesis of other nanosized PCN materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e1a9d210b494a1facdd9dfbc8ecade9 https://doi.org/10.1039/c9nr09287k Zobrazit plný text záznamu