Understanding the Reaction Mechanism of Photocatalytic Reduction of CO2 with H2O on TiO2-Based Photocatalysts: A Review
By Lianjun Liu, Ying Li. Aerosol and Air Quality Research, 2014
305 citations recorded by the source corpus.
Recently, there has been an increasing interest in the research of photocatalytic reduction of CO2 with H2O, an innovative way to simultaneously reduce the level of CO2 emissions and produce renewable and sustainable fuels. Titanium dioxide (TiO2) and modified TiO2 composites are the most widely used photocatalysts in this application; however, the reaction mechanism of CO2 photoreduction on TiO2 photocatalysts is still not very clear, and the reaction intermediates and product selectivity are not well understood. This review aims to summarize the recent advances in the exploration of reaction mechanism of CO2 photoreduction with H2O in correlation with the TiO2 photocatalyst characteristics. Discussions are provided in the following sections: (1) CO2 adsorption, activation and dissociation on TiO2 photocatalyst; (2) mechanism and approaches to enhance charge transfer from photocatalyst to reactants (i.e., CO2 and H2O); and (3) surface intermediates, reaction pathways, and product selectivity. In each section, the effects of material properties are discussed, including TiO2 crystal phases (e.g., anatase, rutile, brookite, or their mixtures), surface defects (e.g., oxygen vacancy and Ti3+) and material modifications (e.g., incorporation of noble metal, metal oxide, and/or nonmetal species to TiO2). Finally, perspectives on future research directions and open issues to be addressed in CO2 photoreduction are outlined in this review paper.
Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/31f67b3ff362a8749ce582763ed1514741ecbcd5
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In Materials Chemistry
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- CuInS2 sensitized TiO2 hybrid nanofibers for improved photocatalytic CO2 reduction (2018, background): “In the process of CO2 reduction, we suppose that the ·OH radicals were captured and quenched by the hydroxyl groups from TiO2 [62, 63].”