纳米纤维
可见光谱
光催化
材料科学
人工光合作用
异质结
化学工程
吸收(声学)
氧化物
电子转移
吸收光谱法
光化学
纳米技术
化学
催化作用
光电子学
有机化学
复合材料
物理
工程类
冶金
量子力学
作者
Yanxin Gao,Zunkun Tan,Rong Yang,Guocheng Huang,Jinhong Bi
标识
DOI:10.1016/j.apsusc.2022.154605
摘要
Artificial photosynthesis is considered a promising strategy to mitigate environmental issues and energy crises. Herein, one-dimensional oxide–semiconductor (TiO2-nanofiber, TNF) and polyarylether-based covalent organic framework (COF-318) were composed to form a visible-light responsive heterojunction (COF-318/TNF) for artificial photosynthesis by simultaneously triggering CO2 reduction and H2O oxidation. Without additional sacrificial agents, photosensitizers or cocatalysts, the optimal sample COF-318/TNF-15 exhibited CO2-to-CO conversion efficiency of 70.1 ± 0.7 µmol∙g−1∙h−1, 12.7 times higher than that of COF-318. The molar ratio of produced CO to O2 was about 2:1, suggesting H2O was the electron donor in the photocatalytic process. Photoelectrochemical measurements and time-resolved transient absorption spectra illustrated the high separation/transfer efficiency of photo-generated charges in COF-318/TNF-15, which was attributed to the construction of heterojunction and the specific one-dimensional property of TiO2 nanofibers. During the CO2 photoreduction, HCOO* was detected as the key intermediate for CO production according to the in-situ FT-IR analysis. This work provides a new route for the rational design of organic–inorganic heterogeneous photocatalysts for visible-light-driven CO2 reduction.
科研通智能强力驱动
Strongly Powered by AbleSci AI