Binary Type-II Heterojunction K7HNb6O19/g-C3N4: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst

Song, Qi; Heng, Shiliang; Wang, Wenbin; Guo, Huili; Li, Haiyan; Dang, Dongbin

doi:10.3390/nano12050849

Open AccessArticle

Binary Type-II Heterojunction K₇HNb₆O₁₉/g-C₃N₄: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst

by

Qi Song

^†,

Shiliang Heng

^†,

Wenbin Wang

,

Huili Guo

,

Haiyan Li

and

Dongbin Dang

^*

Henan Key Laboratory of Polyoxometalate Chemistry, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China

^*

Author to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Nanomaterials 2022, 12(5), 849; https://doi.org/10.3390/nano12050849

Submission received: 26 January 2022 / Revised: 27 February 2022 / Accepted: 28 February 2022 / Published: 2 March 2022

(This article belongs to the Special Issue Advanced Photocatalytic Nanomaterials for Energy Conversion and Environmental Remediation)

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Abstract

The binary type-II heterojunction photocatalyst containing g-C₃N₄ and polyoxoniobate (PONb, K₇HNb₆O₁₉) with excellent H₂ production activity was synthesized by decorating via a facile hydrothermal method for the first time. The as-fabricated Nb–CN-0.4 composite displayed a maximum hydrogen evolution rate of 359.89 µmol g⁻¹ h⁻¹ without a co-catalyst under the irradiation of a 300 W Xenon Lamp, which is the highest among those of the binary PONb-based photocatalytic materials reported. The photophysical and photochemistry analyses indicated that the hydrogen evolution performance could be attributed to the formation of a type-II heterojunction, which could not only accelerate the transfer of photoinduced interfacial charges, but also effectively inhibit the recombination of electrons and holes. This work could provide a useful reference to develop an inexpensive and efficient photocatalytic system based on PONb towards H₂ production.

Keywords: PONb-based photocatalyst; g-C₃N₄; type-II heterojunction; photocatalytic hydrogen evolution

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MDPI and ACS Style

Song, Q.; Heng, S.; Wang, W.; Guo, H.; Li, H.; Dang, D. Binary Type-II Heterojunction K₇HNb₆O₁₉/g-C₃N₄: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst. Nanomaterials 2022, 12, 849. https://doi.org/10.3390/nano12050849

AMA Style

Song Q, Heng S, Wang W, Guo H, Li H, Dang D. Binary Type-II Heterojunction K₇HNb₆O₁₉/g-C₃N₄: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst. Nanomaterials. 2022; 12(5):849. https://doi.org/10.3390/nano12050849

Chicago/Turabian Style

Song, Qi, Shiliang Heng, Wenbin Wang, Huili Guo, Haiyan Li, and Dongbin Dang. 2022. "Binary Type-II Heterojunction K₇HNb₆O₁₉/g-C₃N₄: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst" Nanomaterials 12, no. 5: 849. https://doi.org/10.3390/nano12050849

APA Style

Song, Q., Heng, S., Wang, W., Guo, H., Li, H., & Dang, D. (2022). Binary Type-II Heterojunction K₇HNb₆O₁₉/g-C₃N₄: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst. Nanomaterials, 12(5), 849. https://doi.org/10.3390/nano12050849

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Binary Type-II Heterojunction K₇HNb₆O₁₉/g-C₃N₄: An Effective Photocatalyst for Hydrogen Evolution without a Co-Catalyst

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