Preparation of carbon nitride nanosheets with wide spectral response range and photocatalytic hydrogen production properties

GUO Guizhen; YAO Chenzhong; SUN Youyi; XIN Dehua; LÜ Baohua

doi:10.19906/j.cnki.JFCT.2023065

Volume 52 Issue 2

Feb. 2024

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Article Navigation > Journal of Fuel Chemistry and Technology > 2024 > 52(2): 277-284

GUO Guizhen, YAO Chenzhong, SUN Youyi, XIN Dehua, LÜ Baohua. Preparation of carbon nitride nanosheets with wide spectral response range and photocatalytic hydrogen production properties[J]. Journal of Fuel Chemistry and Technology, 2024, 52(2): 277-284. doi: 10.19906/j.cnki.JFCT.2023065

Citation:

GUO Guizhen, YAO Chenzhong, SUN Youyi, XIN Dehua, LÜ Baohua. Preparation of carbon nitride nanosheets with wide spectral response range and photocatalytic hydrogen production properties[J]. Journal of Fuel Chemistry and Technology, 2024, 52(2): 277-284. doi: 10.19906/j.cnki.JFCT.2023065

Citation:

GUO Guizhen, YAO Chenzhong, SUN Youyi, XIN Dehua, LÜ Baohua. Preparation of carbon nitride nanosheets with wide spectral response range and photocatalytic hydrogen production properties[J]. Journal of Fuel Chemistry and Technology, 2024, 52(2): 277-284. doi: 10.19906/j.cnki.JFCT.2023065

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Preparation of carbon nitride nanosheets with wide spectral response range and photocatalytic hydrogen production properties

doi: 10.19906/j.cnki.JFCT.2023065

GUO Guizhen^{1
,
,},
YAO Chenzhong^1
,,
SUN Youyi^2
,,
XIN Dehua^1
,,
LÜ Baohua^1
,

1.
Department of Applied Chemistry, Yuncheng University, Yuncheng 044000, China
2.
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China

Funds: The project was supported by the General Program of Education Department of Shanxi Province (2020L0566) and the Doctoral research start project (YQ2022008).

Received Date: 2023-06-20
Accepted Date: 2023-08-14
Rev Recd Date: 2023-08-01

Available Online: 2023-09-18

Publish Date: 2024-02-02

Abstract

Abstract

Oxidized carbon nitride nanosheets (o-CN NSs) was prepared by oxidative stripping with bulk carbon nitride (CN) as the precursor, and then reduced carbon nitride nanosheet (r-CN NSs) was prepared via reduced o-CN NSs. The thickness of o-CN NSs and r-CN NSs are both about 2 nm and retain the heptazine ring skeleton structure of pure CN. Compared with o-CN NSs, r-CN NSs has a smaller band gap (2.62 eV), wider photoresponse range (485 nm) and higher H₂ evolution rates (1700 μmol/(g·h)). The H₂ evolution rates of r-CN NSs is 8.5 times of CN and 2.1 times of o-CN NSs. After a 20 h cycle test, the photocatalytic hydrogen production efficiency of r-CN NSs has no attenuation, has well photocatalytic stability. Experimental and theoretical analyses reveal that r-CN NSs is nanosheet structure with amino group at the edge. The introduction of amino group improves the crystallinity of nanosheets, improves the separation efficiency of electrons and holes, broadens the photoresponse range of nanosheets, thus resulting in the enhanced photocatalytic performance.
- carbon nitride,
- nanosheet structure,
- photocatalysis,
- photoresponse range,
- hydrogen evolution

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References(32)

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