Relationship between gCN structure and photocatalytic water splitting efficiency

被引：49

作者：

Florentino-Madiedo, L. ^{[1
]}

Diaz-Faes, E. ^{[1
]}

Barriocanal, C. ^{[1
]}

机构：

[1] CSIC, INCAR, Inst Ciencia & Tecnol Carbono, Francisco Pintado Fe 26, Oviedo 33010, Spain

来源：

CARBON | 2022年 / 187卷

关键词：

Urea; Melamine; Photocatalysis; H-2 evolution rate; s-triazine; Calcination atmosphere; GRAPHITIC CARBON NITRIDE; SOLID-STATE NMR; HYDROGEN EVOLUTION; H-2; EVOLUTION; ENGINEERED G-C3N4; GAS ATMOSPHERE; BAND-GAP; PERFORMANCE; NANOSHEETS; TEMPERATURE;

D O I：

10.1016/j.carbon.2021.11.030

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of precursor and gas atmosphere during graphitic carbon nitride (gCN) preparation on its performance in a photocatalytic water splitting process was studied. Urea and melamine were heated up to 600 degrees C for 2 h in N-2, CO2, air, and static air. The crystalline structure, porosity, chemical composition, and light absorption of the gCNs synthesized were investigated in depth. In addition, their capacity for H-2 production was studied in a quartz top Pyrex reactor connected on-line to a Micro-GC. The best results were obtained with urea heated in a CO2 atmosphere. The results were discussed, considering the band gap and the existence of amino groups in the photocatalysts. In addition, the importance of the presence of s-triazine units was emphasized. (C) 2021 The Author(s). Published by Elsevier Ltd.

引用

页码：462 / 476

页数：15

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