Abstract
Photocatalytic CO2 reduction into solar fuels like CH4 or CH3OH is considered to be one of the most significant ways of addressing the problem of increasing CO2 emissions and global warming. In addition to light accumulation and charge separation, CO2 adsorption/activation and reduction on the surface of heterogeneous photocatalysts remains a technically fundamental problem, limiting total photoconversion efficiency and CO2 reduction selectivity. In this review, we try to overcome these limitations by summarizing the advancements in this field via In2S3-based photocatalysts. This study emphasizes surface reactions and highlights tactics to improve CO2 molecule adsorption/activation and the variables controlling reaction paths and selectivity for reduction products. In addition, it highlights the charge transfer mechanism through Z-scheme and S-scheme in the photoreduction process. The potential for CO2 photoreduction problems and the needed developments over In2S3-based photocatalysts are also discussed, which can further enhance future research. This review utilized a core data set based on Scopus to provide an impartial assessment of the global research on CO2 reduction from 2018 to 2023 (5 years). The Scopus database compiles all data (articles, authors, keywords, and publications). Few works on CO2 photoreduction by In2S3-based photocatalysts were discovered for the bibliometric analysis, and this number is increasing yearly. A 5-year review of the most recent studies on the effect of In2S3-based photocatalysts on CO2 reduction is provided by a bibliometric analysis.
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