Photocatalytic degradation by TiO2-conjugated/coordination polymer heterojunction: Preparation, mechanisms, and prospects

Photocatalytic technology having the advantages of low-cost, environmental friendliness, is important in removing organic pollutants. To enhance the catalytic efficacy of well-established TiO2 photocatalyst, TiO2- conjugated/coordination polymer heterojunction photocatalysts have been rapidly developed in the area of environmental remediation. However, a comprehensive summary and description of these advancements are lacking. To fill this gap, the research progress of TiO2-conjugated/coordination polymer heterojunction photo catalysts for organic pollutants degradation is reviewed. Firstly, classifications, working principles, and photo degradation pathways of TiO2-based heterostructures are introduced. Subsequently, the synthesis strategies, photocatalytic performance, and mechanisms of TiO2-conjugated/coordination polymer photocatalysts are comprehensively summarized. The effects of operational parameters on photodegradation are discussed. Lastly, promising prospects of TiO2-based heterojunction photocatalysts systems and urgent issues to be solved are foreseen. It is hoped that this review sets the trajectory for providing references in preparation and catalytic capacities of TiO2-based heterojunction photocatalysts, providing new ideas for resourceful wastewater remediation.