光催化
兴奋剂
材料科学
异质结
电子转移
价(化学)
载流子
光化学
化学物理
化学
光电子学
催化作用
生物化学
有机化学
作者
Wei-Kean Chong,Boon Junn Ng,Xin Ying Kong,Lling-Lling Tan,Lutfi Kurnianditia Putri,Siang-Piao Chai
标识
DOI:10.1016/j.apcatb.2023.122372
摘要
Construction of heterojunction is conventionally regarded as the prevailing technique to render effective solar-driven photocatalytic water splitting. Nonetheless, realization of p-n homojunction emerges to be an appealing scheme attributed to the non-defective layer coupling and minor charge transfer impedance. Herein, nitrogen-doped ZnIn2S4 (N-ZIS) with dual p-n charge properties was facilely synthesized via one-step in-situ solvothermal method. Systematic investigations unveil that the substituting phenomenon of hosting S by extrinsic N atom with dissimilar electronegativity and valence electron, which eventually ameliorates charge transfer rate and inhibits electron-hole pairs recombination. First-principle density functional theory calculations affirm the p-nature induced by N-doping imparting favorable charge redistribution in the ZIS framework and diminishing hydrogen (H2) evolution reaction kinetic barrier at the surface-active sites. Therein, optimal N-ZIS generated 1575.71 μmol∙g-1 of H2 under 6-hour visible-light irradiation (with an apparent quantum yield of 6.59% at 420 nm monochromatic light irradiation), which is 6.35-fold than the pristine counterpart.
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