Boron/oxygen-codoped graphitic carbon nitride nanomesh for efficient photocatalytic hydrogen evolution

被引：74
作者：
Du, Juan [1 ]
Li, Songmei [1 ]
Du, Zhiguo [1 ]
Meng, Shiming [1 ]
Li, Bin [1 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Aerosp Adv Mat & Performance, Beijing 100191, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2021年 / 407卷
关键词：
Photocatalytic; Hydrogen; g-C3N4; Co-doping; Nanomesh; BORON-DOPED G-C3N4; FUEL-CELLS; WATER; NANOSHEETS; ARCHITECTURE; CATALYSTS; IMPROVE;
D O I：
10.1016/j.cej.2020.127114
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The integration of the construction of a novel structure and hetem-element doping in g-C3N4 photocatalyst is highly attractive in achieving high photocatalytic activities. Herein, boron/oxygen-codoped graphitic carbon nitride nanomesh (BO-C3N4 nanomesh) was designed and high throughout prepared via two steps doping & etching strategy. The obtained BO-C(3)N(4 )nanomesh exhibited a typical two-dimensional porous nanostructure, giving an enlarged specific surface area up to 160.58 m(2) g(-1). Moreover, the bandgap was harnessed by the codoping element (Boron and Oxygen) with different electronegativity. The light-harvesting capability and charge separation efficiency enhanced due to the synergistic interaction of nanomesh architecture and co-doping. Consequently, the BO-C3N4 nanomesh shows an outstanding photocatalytic hydrogen production of 9751 mu mol h(-1) g(-1) upon visible-light(lambda > 420 nm) illumination, nearly 28 times as compared with that of bulk g-C3N4, with 8.1% apparent quantum efficiency at 420 nm and highly stable photocatalytic hydrogen production process over 20 h.
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页数：9
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