In this study, a novel coupling strategy of visible-light photocatalytic hollow optical fiber and graphite carbon nitride matrix composite was proposed to enhance the performance of photocatalytic reduction of CO2 and the efficiency of light energy utilization. The composite material (TMOF/CNNS) composed of TMOF-10-NH2 (TMOF) and g-C3N4 (CNNS) has an enhanced charge separation efficiency. The synthesized TMOF/CNNS photocatalyst was coated on the surface of the optical fiber. The photocatalytic activity of the prepared photocatalytic hollow optical fiber for the gas-phase reduction of CO2 was evaluated in the wavelength range of 380-780 nm. Compared with the photocatalytic reduction of CO2 in the gas phase with CNNS-coated hollow quartz fiber and CNNS-coated filter paper, the TMOF/CNNS-coated hollow quartz fiber significantly improved the CO2 yield and selectivity of CO.
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