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Efficient Visible-Light-Driven Photoreduction of CO2 to CO over Porous Nitrogen-Deficient Carbon Nitride Nanotubes

Abstract

Solar energy-driven photoreduction of CO2 with H2O to hydrocarbon fuels is an interesting topic but challenging. 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 absence of any cocatalyst and sacrifice reagent. The NCN-T series were prepared via the thermally etching approach, which showed specific surface area up to 207 m2/g and CO2 uptake capacity of 4.06 wt%. It was indicated that the nitrogen vacancies in NCN-T not only promoted the ultilization of visible-light by extending spectral response range, but also served as the 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, >9 times higher than that produced over bulk counterpart.

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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
Citation: Catal. Sci. Technol., 2019, Accepted Manuscript

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    Efficient Visible-Light-Driven Photoreduction of CO2 to CO over Porous Nitrogen-Deficient Carbon Nitride Nanotubes

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

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