【摘要】 采用水热/水浴两步法构筑了肖特基型Zn_0.11Co_0.42Ni_0.47Se/ZnIn₂S₄（ZCNSe/ZIS）化合物，研究了其物相组成、形貌结构、界面结构、能带排列和光热效应等对析氢性能的影响规律，探讨了其析氢机理.结果表明，负载ZCNSe后，样品表现出良好的光热效应，有效提高了可见光及近红外光的吸收能力，肖特基势垒促进了光生电荷的有效分离，抑制了光生电子-空穴对复合，光解水析氢性能得到有效提高，最佳样品ZCNSe-4/ZIS的析氢速率达到6.89 mmol·g^-1·h^-1，约为纯相ZIS(1.98 mmol·g^-1·h^-1)的3.48倍；能带结构、光电子动力学及光热吸收表征结果共同证实了肖特基型ZCNSe/ZIS化合物的光生载流子动力学机制.更多还原

【Abstract】 Schottky-type Zn_0.11Co_0.42Ni_0.47Se/ZnIn₂S₄（ZCNSe/ZIS） composites were constructed by a two-step hydrothermal/water-bath method.The influence of phase composition,morphological structure,interfacial structure,band alignment and photothermal effect on the hydrogen evolution reaction（HER） was investigated.The photocatalytic mechanism was discussed.The results indicate that ZCNSe/ZIS samples exhibit excellent photothermal effect,which effectively improves the visible-light and near-infrared-light absorption.Simultaneously,the Schottky contact facilitates the carrier separation and suppresses the electron-hole recombination.Consequently,the HER performance is enhanced markedly,and the optimal ZCNSe-4/ZIS sample achieves a hydrogen evolution rate of 6.89 mmol·g^-1·h^-1,which is ca.3.48 times higher than that of pristine ZIS(1.98 mmol·g^-1·h^-1).Moreover,band structure,photoelectron dynamics and photothermal characterizations collectively corroborate the photogenerated carrier transfer mechanism in Schottky-type ZCNSe/ZIS composites.更多还原