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Oxygen vacancy rich Cu2O based composite material with nitrogen doped carbon as matrix for photocatalytic H2 production and organic pollutant removal

Abstract

A nitrogen doped carbon matrix supported Cu2O composite material (Cu/Cu2O@NC) was fabricated successfully with a coordination polymer as precursor through calcination. In this composite material, Cu2O particles with the size about 6 to 10 nm disperse evenly in the nitrogen doped carbon matrix. After calcination, some coordinated nitrogen atoms dope in lattice of Cu2O and replace oxygen atoms, which generate a large number of oxygen vacancies. In Cu/Cu2O@NC, the existence of oxygen vacancy has been confirmed by electron spin resonance (ESR) and X-ray photoelectron spectroscopy (XPS). Under visible light irradiation, Cu/Cu2O@NC exhibits excellent H2 production property with the rate 379.6 μmol•h-1•g-1. Its photocatalytic activity still takes effect on organic dyes, such as Rhodamine B (RhB) and methyl orange (MO). Besides photocatalysis, Cu/Cu2O@NC also exhibits striking catalytic activity in reductive conversion of 4-nitrophenol to 4-aminophenol with the existence of sodium borohydride (NaBH4). The conversion efficiency reaches almost 100 % in 250 s with the quantity of Cu/Cu2O@NC as low as 5 mg. The outstanding H2 production and organic pollutants removal properties originate from oxygen vacancy. We expect that Cu/Cu2O@NC will find its way as a new resource for hydrogen energy as well as a promising material in water purification.

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Publication details

The article was received on 12 Oct 2017, accepted on 02 Jan 2018 and first published on 02 Jan 2018


Article type: Paper
DOI: 10.1039/C7DT03835F
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Oxygen vacancy rich Cu2O based composite material with nitrogen doped carbon as matrix for photocatalytic H2 production and organic pollutant removal

    L. Lu, X. Xu, J. Yan, F. Shi and Y. Huo, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C7DT03835F

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