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Issue 43, 2019
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Hierarchical macro-mesoporous g-C3N4 with an inverse opal structure and vacancies for high-efficiency solar energy conversion and environmental remediation

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Abstract

Hierarchical macro-mesoporous structures with an efficient mass transfer and light harvesting offer great advantages for photocatalysis. Nitrogen vacancy modified ordered hierarchical macro-mesoporous g-C3N4 (Nv MM CN) was fabricated by a dual-templating method combining an ordered SiO2 colloidal crystal and NH4Cl. The as-prepared Nv MM CN was applied for photocatalytic degradation of antibiotics and production of hydrogen. Nv MM CN showed 27 times higher photocatalytic degradation efficiency and 7.5 times higher hydrogen production than bulk g-C3N4 (Bulk CN) under visible light irradiation. The 3D well interconnected macro-mesoporous structure and the porous system accelerated adsorption as well as the reaction rate and the inverse opal photonic crystals provided multiple scattering effects to strengthen light absorption. Meanwhile, the nitrogen vacancy introduced acted as a separation center to capture electrons or holes to improve the separation efficiency of charges. This efficient, stable, and environmentally friendly visible light-driven Nv MM CN may be an alternative for effective implementation in wide-ranging energy and environmental applications.

Graphical abstract: Hierarchical macro-mesoporous g-C3N4 with an inverse opal structure and vacancies for high-efficiency solar energy conversion and environmental remediation

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Publication details

The article was received on 08 Aug 2019, accepted on 28 Sep 2019 and first published on 03 Oct 2019


Article type: Paper
DOI: 10.1039/C9NR06802C
Nanoscale, 2019,11, 20638-20647

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    Hierarchical macro-mesoporous g-C3N4 with an inverse opal structure and vacancies for high-efficiency solar energy conversion and environmental remediation

    Y. Tian, L. Zhou, Q. Zhu, J. Lei, L. Wang, J. Zhang and Y. Liu, Nanoscale, 2019, 11, 20638
    DOI: 10.1039/C9NR06802C

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