Construction of Bi/Bi2S3/TiO2 S-Scheme Heterojunction for Enhanced Photothermal Catalytic CO2 Reduction

作者：Mei‐Hong Lu, Kai Zhang, Dingming Peng, Meiyun Luo, Yang Zhang, Yumei Qin · 发表于：Langmuir · 年份：2025 · DOI：10.1021/acs.langmuir.5c02614 · 被引用次数：6 · 研究领域：graph theory and CDMA systems、DNA and Biological Computing

The ternary Bi/Bi 2 S 3 /TiO 2 (BST) heterojunction was successfully fabricated through integration of the hydrothermal method combined with thermal calcination. TiO 2 nanosheets serves as the host for the in situ deposition of Bi 2 S 3 and Bi nanoparticles, and the tight interface with the heterojunction favors efficient charge transfer. Bi 2 S 3 with a narrow band gap characteristic enables UV–visible–infrared full-spectrum absorption, and metallic Bi with a surface plasmon resonance (SPR) effect generating hot electron injection can effectively transfer and separate photogenerated charge carriers. The BST catalyst shows a broad-spectrum response and excellent photothermal effect, which could absorb near-infrared energy and improve the CO 2 reduction performance. Furthermore, the surface temperature of the BST composite reaches 109.0 °C within 10 min, exhibiting an excellent photothermal catalytic CO production rate of 175.94 μmol g –1 h –1 at 70 °C, which is ∼6.5 times higher than that of pristine TO 2 . The excellent photocatalytic performance can be ascribed to the unique ternary heterojunction structure with suitable band gap structure. Localized heating not only accelerates carrier migration but also thermally activates CO 2 adsorption. This work advances the design of full-spectrum-driven photothermal catalytic systems for the efficient catalytic conversion of CO 2 .