Research Article


2021, 14(8): 2558–2567


Lattice-strained nanotubes facilitate efficient natural sunlightdriven CO2 photoreduction

Shujie Liang1,§, Xueming Liu1,§, Zuqi Zhong1, Bin Han1, Xiaohui Zhong1, Weiyi Chen1, Kainan Song1, Hong Deng1,2 (✉), and Zhang Lin1,2

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1 School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510006, China
2 Guangdong Engineering and Technology Research Center for Environmental Nanomaterials, The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters (Ministry of Education), Guangzhou 510006, China
§ Shujie Liang and Xueming Liu contributed equally to this work.

Keywords: CO2 photoreduction, diluted CO2, lattice strain, natural sunlight, application
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Photocatalytic reduction of CO2 holds tremendous promise for alleviating the energy crisis. Despite the progress that has been made, there are still some challenges to overcome, such as the realization under real sunlight rather than the simulation condition. In this work, ultrathin Ni2(OH)(PO4) nanotubes (NTs) prepared through hydrothermal route are applied as a novel catalyst for photocatalytic reduction of CO2 under real sunlight. The prepared Ni2(OH)(PO4) NTs exhibit a 11.3 μmol·h-1 CO production rate with 96.1% CO selectivity. Interestingly, Ni2(OH)(PO4) NTs have a positive impact on the facilitation of photoreduction in diluted CO2. Notably, when the system is performed under real sunlight, Ni2(OH)(PO4) NTs afford an accumulated CO of ca. 26.8 μmol with 96.9% CO selectivity, exceeding most previous inorganic catalysts under simulated irradiation in the laboratory. Our experimental results demonstrate that the multisynergetic effects induced by surface-OH and the lattice strain serve as highly active sites for CO2 molecular adsorption and activation as well as electron transfer, hence enhancing photoreduction activity. Therefore, this work provides experimental basis that CO2 photocatalysis can be put into practical use.
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Lattice-strained nanotubes facilitate efficient natural sunlightdriven CO2 photoreduction. Nano Res. 2021, 14(8): 2558–2567

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