Abstract
Conjugated organic polymers (COPs) have attracted increasing attentions as promising metal-free photocatalysts in the past decade. In this work, two newly designed COPs (An-TATB and An-TPA; An = anthracene, TATB = 1,3,5-triazine-2,4,6-Triphenyl, TPA = triphenylamine) were solvothermally synthesized. The conjugated structures of the constructed COPs endow them wide absorption ranges and sufficient photoredox potentials. Then, these constructed COPs are developed as photocatalysts for Cr(VI) reduction and organic pollution degradation in water. Due to the unique donor-acceptor structure, An-TATB showed more efficient photoinduced charge separation and better photocatalytic performances than An-TPA. Importantly, Cr(VI) and organic pollution can be simultaneously removed by An-TATB without any sacrificial agent, oxidant or additional acid. In addition, the reaction active species in pollutant removal process have been studied and the photocatalytic mechanism has also been proposed. This work provides an effective way for the design and construction of new high-efficiency metal-free photocatalysts for wastewater treatment.
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