Abstract
The increasing concentration of CO2 in the atmosphere is causing global warming and adverse global environmental changes. Significant efforts have focused on decreasing the CO2 emissions to the atmosphere. The utilization of CO2 via photocatalytic reduction has the potential to mitigate emissions while producing light fuels, such as H2, CO, CH4, CH3OH, and value-added chemicals. The massive burning of fossil fuels to fulfill the growing energy demands of the world has triggered the ever-increasing emission of carbon dioxide (CO2), the main cause of global warming. Photocatalytic reduction of CO2 into solar fuels and chemicals using everlasting solar energy seems a promising technology to contemporaneously curb global warming and partially fulfill the energy requirements. This chapter focuses on the most common photocatalyst, TiO2, and strategies to improve its efficiency in CO2 photoconversion. The overview of fundamentals and latest developments in TiO2-based nanophotocatalysts for CO2 conversion are discussed in this chapter. More specifically, the fundamental mechanisms, thermodynamics, and kinetics of photocatalytic CO2 reduction over TiO2 nanophotocatalysts, as well as the synthesis and various modification strategies of TiO2 nanophotocatalysts are critically deliberated.
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