Citation: Jinhua Luo, Zhexing Lin, Yan Zhao, Shujuan Jiang, Shaoqing Song. The embedded CuInS₂ into hollow-concave carbon nitride for photocatalytic H₂O splitting into H₂ with S-scheme principle[J]. Chinese Journal of Catalysis, ;2020, 41(1): 122-130. doi: S1872-2067(19)63490-X shu

The embedded CuInS₂ into hollow-concave carbon nitride for photocatalytic H₂O splitting into H₂ with S-scheme principle

Jinhua Luo ^a,b, ,
Zhexing Lin ^a ,
Yan Zhao ^a ,
Shujuan Jiang ^a,b ,
Shaoqing Song ^a,b

a School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, Zhejiang, China;
b Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, Zhejiang, China

Received Date: 1 July 2019
Revised Date: 24 July 2019

Fund Project: Study was supported by the National Natural Science Foundation of China (21871155), the K. C. Wong Magna Fund in Ningbo University, Fan 3315 Plan, and Yongjiang Scholar Plan.

It is still a great challenge to effectively optimize the electronic structure of photocatalysts for the sustainable and efficient conversion of solar energy to H₂ energy. To resolve this issue, we report on the optimization of the electronic structure of hollow-concave carbon nitride (C₃N₄) by deviating the sp²-hybridized structure of its tri-s-triazine component from the two-dimensional plane. The embedded CuInS₂ into C₃N₄ (CuInS₂@C₃N₄) demonstrates an increased light-capturing capability and the promoted directional transfer of the charge carrier. Research results reveal that the hollow structure with an apparent potential difference between the concave and convex C₃N₄ drives the directional transfer of the photoinduced electrons from the Cu 2p orbital of CuInS₂ to the N 1s orbital of C₃N₄ with the S-scheme principle. The H₂ evolution efficiency over CuInS₂@C₃N₄ is up to 373 µmol∙h^-1 g^-1 under visible irradiation, which is 1.57 and 1.35 times higher than those over the bulk g-C₃N₄ with 1 wt% Pt (238 µmol∙h^-1 g^-1) and g-C₃N₄ with 3 wt% Pd (276 µmol∙h^-1 g^-1), respectively. This suggests that the apparent potential difference of the hollow C₃N₄ results in an efficient reaction between the photogenerated electrons and H₂O. This work supplies a new strategy for enhancing the sustainable solar conversion performance of carbon nitride, which can also be suitable for other semiconductors.
- Hollow carbon nitride,
- Hydrogen evolution,
- Solar light absorption,
- Directional charge transfer,
- Apparent potential difference
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The embedded CuInS2 into hollow-concave carbon nitride for photocatalytic H2O splitting into H2 with S-scheme principle

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The embedded CuInS₂ into hollow-concave carbon nitride for photocatalytic H₂O splitting into H₂ with S-scheme principle