电场
电荷(物理)
方案(数学)
领域(数学)
化学工程
材料科学
化学
化学物理
工程类
物理
量子力学
数学分析
数学
纯数学
作者
Rizwan Ullah,Ali Haider,Min Liu,Muhammad Zahid,Munir Ahmad,Johar Zeb,Imran Khan,Ahmed E. Ismail,Salman Hayat,M. Bououdina,Anadil Gul,Xiaoqiang Wu,Fazal Raziq,Jun Song Chen,Yanhao Dong,Zhong Li,Sajjad Ali,Sharafat Ali,Liang Qiao
标识
DOI:10.1016/j.seppur.2024.126578
摘要
The Z-scheme heterojunction offers hope for CO2 reduction due to its unique charge migration, superior separation, and high redox capacity. Yet, regulating charge transfer in nanoscale heterostructure interfaces remains a significant challenge. Herein, we systematically engineered interfacial dual tungsten (W) bonds and built-in electric field (BIEF) modulated Z-scheme heterostructure composed by CoPc and Bi2WO6 (BWO), stimulate a Z-scheme charge shuttle cascade, channelling electrons from BWO to CoPc, thereby optimizing charge separation and upholding a high redox potential. The optimized photocatalyst exhibits high CH4/CO2 rate of ∼2.5 compared to pure BWO under vis-light for efficient CO2 reduction. The improved photoactivity is confirmed through theoretical/experimental evidence, highlighting the significance of newly formed W-O-C and W-Co bonds and BIEF. These components function as atomic-level interfacial channels, efficiently accelerating Z-scheme interfacial electron shuttle and shortening the electron-shuttle distance. Furthermore, the extended visible-light range, enabled by the molecular dispersion of CoPc, and the favourable catalytic function of its central metal cation (Co2+) for CO2 activation, significantly contribute to the overall enhancement. This work offers a new platform to design emerging modulated CO2 photoreduction systems based on Z-scheme charge shuttle by regulating atomic-level interface and BIEF to remarkably encourage photocatalytic CO2 photo-reduction performance.
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