Carbon material-TiO₂ for photocatalytic reduction of CO₂ and degradation of VOCs: A critical review

The CO₂ emissions brought about by traditional volatile organic compounds (VOCs) reduction technologies have become an urgent problem in the carbon neutrality era. The combination of adsorption and photocatalysis could meet the requirements for co-ordinated control of VOCs and CO₂ emissions. This review summarizes and analyzes the research results of carbon material-TiO₂ cross-linked structure for the photocatalytic degradation of VOCs and reduction of CO₂. This article first systematically analyzes the impact of environmental factors on photocatalytic efficiency, summarizes the characteristics of different modification methods. Then, it further summarizes the main directions of carbon material modification, and focuses on the research on the functional cross-linking of different carbon materials and TiO₂. Finally, this paper indicates the photocatalytic degradation/reduction pathways of different reactants, and analyzes the synergistic mechanism of carbon material-TiO₂. This review will provide parameter support and optimization suggestions for the research of carbon materials-TiO₂ nano-composites, and provide foundation for future researches.