Abstract
Carbon dioxide (CO2), as one of the main greenhouse gases, has been focused on for photoreduction into useful chemical fuels under solar light irradiation to solve the problems of global warming and energy shortage. The key factor is the catalyst and the core–shell structured nanomaterial is regarded as a promising photocatalyst, with the advantages of large specific surface areas, novel electronic structures, and strong synergistic interfacial interactions. Herein, the chapter highlights recent advances in developing core–shell structured photocatalysts for the reduction in CO2. The systems of various zero dimensional (0D) nanoparticles, 1D nanofibers/nanotubes, 2D nanosheets, and 3D hierarchical nanocomposites have mainly been described, including noble metals, carbon nanofibers/nanotubes, 1D metal oxides, 2D graphene, g-C3N4, 3D MOFs, etc. It has been proposed that the design and synthesis of nanocomposites with core–shell structures are beneficial for the fast charge separation/migration, rich light absorption, and efficient reactant CO2 adsorption/activation under the influences of Z-scheme, polarization, and built-in electric field, thus promoting the photocatalytic performance and active intermediate formation. Furthermore, the synergistic interaction mechanisms of multistep electrons transfer and CO2 adsorption-photoreduction are addressed, especially the importance of reactive sites on photocatalysts, such as vacancies in the crystal lattice, anchoring functional groups, doping single heterogeneous atoms, and fabricating Lewis acid/base pairs. Based on the current state-of-the-art for CO2 photocatalytic conversion far from the practical realization, a perspective on the direction and prospect of the controllable core–shell structured nanocomposites for photocatalytic CO2 reduction in future is concluded.
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Zou, W., Wei, X., Dong, L. (2021). Core–Shell Materials for Photocatalytic CO2 Reduction. In: Yamashita, H., Li, H. (eds) Core-Shell and Yolk-Shell Nanocatalysts. Nanostructure Science and Technology. Springer, Singapore. https://doi.org/10.1007/978-981-16-0463-8_13
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DOI: https://doi.org/10.1007/978-981-16-0463-8_13
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