Boosting(机器学习)
光催化
电子转移
机制(生物学)
壳体(结构)
电子
芯(光纤)
化学
光化学
材料科学
化学物理
化学工程
纳米技术
物理
计算机科学
工程类
人工智能
复合材料
核物理学
量子力学
有机化学
催化作用
作者
Ziyi Li,Jia Xiong,Yufei Huang,Yangqiang Huang,Geoffrey I. N. Waterhouse,Ziyun Wang,Yu Mao,Zhiwu Liang,Xiao Luo
标识
DOI:10.1016/j.cej.2024.150304
摘要
Core-shell structure photocatalysts are favored due to their confinement effect that enhances photoreaction efficiency, but their synergistic effect with heterojunctions is frequently overlooked. Herein, we synthesized a porous core–shell photocatalyst TiO2 nanoparticles@graphitic carbon nitride (labeled as TNPs@CN) from self-assembled supramolecular precursors for high-efficient photocatalytic CO2 reduction. The porosity facilitates CO2 transport and adsorption, while Z-scheme on the core–shell interface enhances electron transfer. Both in situ experimental and theoretical calculations have proved the Z-scheme heterojunction of TNPs@CN with a high photoreduction CO2 rate of 26.89 and 8.91 μmol g−1h−1 for CO and CH4, respectively, which are far higher than those of amorphous TNPs-CN. A 13CO2 labeled isotopic experiment and in situ FT-IR results laid the foundation for the mechanism of CO2 photoreduction, which was then investigated in-depth by calculating free energy profile. This work provides valuable insights for designing high-performance photocatalysts that leverage the synergistic effect of core–shell structure and Z-scheme electron transfer for artificial photosynthesis.
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