摘要
The combination of S-scheme heterojunction and photothermal effect is a promising strategy to achieve efficient CO_(2)photoreduction into solar fuel due to the boosted charge carrier separation efficiency and faster surface reaction rate.Herein,unique photothermal-coupled TiO_(2)/Bi_(2)S_(3)S-scheme heterojunction nanofibers were fabricated and applied to a full-spectrum CO_(2)photoreduction system.Density functional theory calculation and experimental analyses have confirmed the generation of the internal electric field and the S-scheme electron transfer pathway,leading to a highly efficient charge carrier separation.Thanks to the excellent photothermal conversion capacity of Bi_(2)S_(3),the photogenerated electron transfer rate,and surface reaction rate were further accelerated in hybrid photocatalysts.Under the synergistic effect of Sscheme heterojunction and photothermal effects,the optimal TiO_(2)/Bi_(2)S_(3)nanofibers achieved 7.65μmol h^(–1)of CH_(4)production rate,which is 5.24 times higher than that of pristine TiO_(2).Moreover,the morphology reconstruction of Bi_(2)S_(3)in hybrids facilitates the CH4 selectivity was significantly improved from 64.2%to 88.7%.Meanwhile,the CO_(2)photoreduction reaction route over TiO_(2)/Bi_(2)S_(3)nanofibers was investigated based on in-situ Fourier transform infrared spectra.This work provides some useful hints for designing highly efficient photothermal-coupled photocatalysts for CO_(2)photoreduction.
基金
supported by the National Natural Science Foun-dation of China(Grant Nos.52003079,22075072,and 52104254)
the Hubei Provincial Natural Science Foundation of China(Grant Nos.2021CFB569,2023AFD027,and 2021CFB242)
the Hubei Key Laboratory of Pollutant Analysis&Reuse Technology Open Foundation(Grant Nos.PA200206 and PA220208).
