期刊
CHEMICAL ENGINEERING JOURNAL
卷 446, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.137161
关键词
CO 2 conversion; Chemical engineering; Electronic engineering; Novel double perovskite; Density functional theory
资金
- National Natural Science Foundation of China [11774044, 52072059, 22150610469]
- Research Fund for International Excellent Young Scientists [22150610469]
- (NSFC)
Perovskite semiconductors with high symmetry anisotropic facets were synthesized using a flux-assisted technique. By surface doping of sulfur and carbon, the photocatalytic CO2 reduction activity of Sr2CoTaO6 was significantly enhanced.
Perovskite semiconductor materials attracted tremendous interest in heterogeneous photocatalysis. However, most of these semiconductors have limited charge mobility and poor charge separation. Using a flux-assisted technique, we synthesized high symmetry anisotropic facets (18-facet Sr2CoTaO6) double perovskite oxide semiconductor. Surface doping of sulfur (S) and carbon (C) into the lattice of a particulate novel Sr2CoTaO6 induced microstrain to enhance the photocatalytic conversion of CO2 by boosting charge density to tune chargecarrier mobility. The S and C incorporation boosted the photocatalytic CO2 reduction more than eleven orders of magnitude higher than pristine Sr2CoTaO6 under visible light irradiation. Such efficient photocatalytic CO2 reduction is attributed to the synergistic effect of tuning the carriers mobility and spatial charge separation via chemical and electronic engineering of the particulate (S, C)-codoped Sr2CoTaO6. The concept of fabrication of spatial charge separation and engineering electron mobility will explore a new avenue to design an efficient photocatalytic system for the conversion of solar energy to solar fuels.
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