Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 9, Issue 10, Pages 2485-2492Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cy02509f
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Funding
- National Natural Science Foundation of China [21533011, 21673256, 21125314, 21773266]
- Chinese Academy of Sciences [QYZDY-SSW-SLH013-2]
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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 m(2) 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 mol g(-1) h(-1), which was >9 times higher than that obtained over the bulk counterpart.
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