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Issue 63, 2018
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Synthesis and photocatalytic CO2 reduction performance of aminated coal-based carbon nanoparticles

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Abstract

To obtain high-efficiency, low-cost, environmentally friendly carbon-based photocatalytic material, we synthesized coal-based carbon dots with sp2 carbon structure and multilayer graphene lattice structure by the hydrogen peroxide (H2O2) oxidation method to strip nano-scale crystalline carbon in the coal structure and link with oxygen-containing groups such as the hydroxyl group. N, S co-doped aminated coal-based carbon nanoparticles (NH2-CNPs) were then obtained by thionyl chloride chlorination and ethylenediamine passivation. The physical properties and chemical structure of the synthesized NH2-CNPs were studied and the photocatalytic CO2 reduction performance was tested. The results show that NH2-CNPs are vesicle-type spherical particles with particle size of 42.16 ± 7.5 nm and have a mesoporous structure that is capable of adsorbing CO2. A defect structure was formed on the surface of the NH2-CNPs due to the doping of N and S elements, thereby significantly improving the ability to photogenerate electrons under visible light along with the ability to efficiently separate the photo-generated carriers. The photocatalytic reduction products of CO2 over NH2-CNPs were CH3OH, CO, C2H5OH, H2 and CH4. After 10 hours of reaction, the total amount of products was 807.56 μmol g−1 cat, the amount of CH3OH was 618.7 μmol g−1 cat, and the calculated selectivity for conversion of CO2 to CH3OH was up to 76.6%.

Graphical abstract: Synthesis and photocatalytic CO2 reduction performance of aminated coal-based carbon nanoparticles

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Publication details

The article was received on 17 Jul 2018, accepted on 10 Oct 2018 and first published on 23 Oct 2018


Article type: Paper
DOI: 10.1039/C8RA06062B
RSC Adv., 2018,8, 35989-35997
  • Open access: Creative Commons BY-NC license
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    Synthesis and photocatalytic CO2 reduction performance of aminated coal-based carbon nanoparticles

    H. Maimaiti, A. Awati, D. Zhang, G. Yisilamu and B. Xu, RSC Adv., 2018, 8, 35989
    DOI: 10.1039/C8RA06062B

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