Abstract
A method based on the adsorption of ions on the surface of two-dimensional (2D) nanosheets has been developed for photocatalytic CO2 reduction. Isolated Bi ions, confined on the surface of TiO2 nanosheets using a simple ionic adsorption method facilitate the formation of a built-in electric field that effectively promotes charge carrier separation. This leads to an improved performance of the photocatalytic CO2 reduction process with the preferred conversion to CH4. The proposed surface ion-adsorption method is expected to provide an effective approach for the design of highly efficient photocatalytic systems. These findings could be very valuable in photocatalytic CO2 reduction applications.
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Acknowledgements
This work was financially supported by the National Basic Research Program of China (No. 2015CB932302), National Natural Science Foundation of China (Nos. U1432133, 11621063, 21701164, and 11374273), National Program for Support of Top-notch Young Professionals and the Fundamental Research Funds for the Central Universities (Nos. WK2060190084, WK2060190058, and WK2340000063). We also appreciate the support from the Major/Innovative Program of Development Foundation of Hefei Center for Physical Science and Technology.
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Li, X., Bi, W., Wang, Z. et al. Surface-adsorbed ions on TiO2 nanosheets for selective photocatalytic CO2 reduction. Nano Res. 11, 3362–3370 (2018). https://doi.org/10.1007/s12274-017-1933-4
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DOI: https://doi.org/10.1007/s12274-017-1933-4