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Issue 10, 2019
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Visible-light-driven photoreduction of CO2 to CO over porous nitrogen-deficient carbon nitride nanotubes

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Abstract

The solar energy-driven photoreduction of CO2 with H2O to hydrocarbon fuels is an interesting but challenging topic. Herein, we report porous nitrogen-deficient carbon nitride nanotubes with tunable nitrogen vacancies (NCN-T) for visible-light-driven photoreduction of CO2 to CO in the absence of any cocatalyst and sacrificial reagent. The NCN-T series were prepared via the thermal etching approach, which showed a specific surface area of up to 207 m2 g−1 and a CO2 uptake capacity of 4.06 wt%. It was indicated that the nitrogen vacancies in NCN-T not only promoted the utilization of visible-light by extending the spectral response range, but also served as centres for capturing photoexcited electrons, hence, efficiently inhibiting the recombination of radiative electron–hole pairs. As a consequence, the NCN-T catalysts achieved the highest CO formation rate of 43.9 μmol g−1 h−1, which was >9 times higher than that obtained over the bulk counterpart.

Graphical abstract: Visible-light-driven photoreduction of CO2 to CO over porous nitrogen-deficient carbon nitride nanotubes

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Publication details

The article was received on 12 Dec 2018, accepted on 09 Apr 2019 and first published on 09 Apr 2019


Article type: Paper
DOI: 10.1039/C8CY02509F
Catal. Sci. Technol., 2019,9, 2485-2492

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    Visible-light-driven photoreduction of CO2 to CO over porous nitrogen-deficient carbon nitride nanotubes

    S. Guo, H. Zhang, P. Yang, Y. Chen, X. Yu, B. Yu, Y. Zhao, Z. Yang and Z. Liu, Catal. Sci. Technol., 2019, 9, 2485
    DOI: 10.1039/C8CY02509F

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