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| Surface plasmon resonance effect enhanced photocatalytic CO2 reduction performance of S-scheme Bi2S3/TiO2 heterojunction |
| Author Name | Affiliation | E-mail | | CAO Tieping | College of Chemistry and Materials Engineering, Hainan Vocational University of Science and Technology, Haikou 570100, China | | | LI Yuejun | College of Chemistry and Materials Engineering, Hainan Vocational University of Science and Technology, Haikou 570100, China | bc640628@163.com | | SUN Dawei | College of Chemistry, Baicheng Normal University, Baicheng, Jilin 137000, China | |
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| Abstract: A novel Bi/Bi2S3/TiO2 composite fibers photocatalytic materials were constructed by in-situ hydrothermal method using TiO2 nanofibers prepared by electrospinning technology serve as the matrix, bismuth nitrate as the bismuth source and ethylene glycol as the reducing agent. The morphology, structure, and optoelectronic properties of the composite fibers material were analyzed by powder X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope, ultraviolet-visible absorption spectroscopy, photocurrent response, electrochemical impedance spectroscopy, and fluorescence emission spectroscopy. The photocatalytic CO2 reduction performance of Bi/Bi2S3/TiO2 composite fibers under a gas-solid reaction system was investigated. The results show that metal Bi nanoparticles and scaly Bi2S3 are orderly constructed on the surface of TiO2 nanofibers. The surface plasmon resonance (SPR) effect of metal Bi has a synergistic effect with the Bi2S3/TiO2 S-scheme heterojunction, which enables the efficient spatial separation and transfer of photogenerated carriers and effectively enhances the photocatalytic activity of Bi/Bi2S3/TiO2. In-depth research found that the S-scheme heterojunction possesses a unique mechanism of carrier movement, resulting in a robust redox capacity and strong driving force. The main products of the photocatalytic CO2 reduction were CH4 and CH3OH, with yields of 4.21 and 9.86 μmol·h-1·g-1, respectively, about three times that of Bi2S3/TiO2. |
| Keywords: surface plasmon resonance S-scheme heterojunction photocatalytic CO2 reduction |
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| CAO Tieping,LI Yuejun,SUN Dawei.Surface plasmon resonance effect enhanced photocatalytic CO2 reduction performance of S-scheme Bi2S3/TiO2 heterojunction[J].Chinese Journal of Inorganic Chemistry,2025,41(5):903-912. |
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