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Synthesis of hollow donut-like carbon nitride for the visible-light-driven highly efficient photocatalytic hydrogen production and pollutants degradation

Abstract

A hollow donut-like g-C3N4 (CMU-500) is prepared by controlling supramolecular polymer composed of cyanuric acid, melamine and urea at 500 °C calcination in air. CMU-500 has a large specific surface area of 92 m2/g, which is ten-fold higher than bulk g-C3N4. It exhibits high separation efficiency for photogenerated electron-hole pairs and high conductivity for interfacial charge transfer. CMU-500 exhibits a high visible light photocatalytic activity in the degradation of rhodamine B (k = 0.364 min-1) and reduction of Cr (VI) (k = 0.463 min-1), in which the rate constants k are more than 30 times superior to those of bulk g-C3N4. The hydrogen production efficiency of CMU-500 with co-catalyst Pt is as high as 2260 μmol g-1 h-1 under visible light irradiation, which is 180 times higher than bulk g-C3N4. An excellent stability of photocatalytic activity was observed in both of photocatalytic degradation and hydrogen production by four cycles of tests. Our results suggest a new strategy to design and synthesize high-effective photocatalysts toward to treatment of environmental pollution and hydrogen production.

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Supplementary files

Article information


Submitted
03 May 2020
Accepted
22 Jun 2020
First published
23 Jun 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

Synthesis of hollow donut-like carbon nitride for the visible-light-driven highly efficient photocatalytic hydrogen production and pollutants degradation

S. Liu, X. Song, G. Liu, Z. Dai, S. Zhang, C. Hao and Z. Tan, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0NJ02244F

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