张 宁1， 冯靖书2， 杨倩倩1， 闫 涛1
（1. 济南大学 水利与环境学院， 山东 济南 250022；2. 山东格莱美环保科技有限公司， 山东 济南 250117）
DOI:10.13732/j.issn.1008-5548.2021.03.010
收稿日期： 2020-12-24，修回日期：2021-01-25，在线出版时间：2021-04-07 14:03。
基金项目：山东省自然科学基金，编号：ZR2020MB091。
第一作者简介：张宁(1994—)，男，硕士研究生，研究方向为光催化分解水产氢。E-mail：zhangningrr@163.com。
通信作者简介：闫涛(1980—)，男，博士，副教授，硕士生导师，研究方向为环境功能材料。E-mail： yantujn@163.com。
摘要：通过溶剂热法将Co9S8纳米粒子负载在一维CdS纳米棒上，形成一维异质结复合材料用于光催化产氢。结合X射线衍射、扫描电子显微镜、紫外-可见漫反射等表征了材料的组成、微观结构、光学性能等，并进行光催化产氢性能测试。结果表明，当Co9S8的负载量为CdS质量的10%时复合材料具有最佳的产氢速率18.72 mmol·g-1·h-1，约为CdS产氢速率的16倍。此外复合材料还表现出良好的循环稳定性，在连续12 h光催化产氢测试中，产氢性能没有明显下降。探讨了材料的电荷转移机制，从瞬态光电流、交流阻抗、光致发光等表征结果可知，一维异质结CdS-Co9S8可以显著提高光生电子-空穴对的迁移分离效率，从而显著提高材料光催化产氢性能。
关键词：硫化镉；八硫化九钴；一维材料；光催化产氢
Abstract: Co9S8 nanoparticles were loaded on one-dimensional CdS nanorods through solvothermal method to form a one-dimensional heterojunction structure for photocatalytic hydrogen production. Combining the characterization of XRD, SEM, and UV-Vis DRS, the composition, microstructure, and optical properties of the material were studied.Then the photocatalytic properties were tested. The results showed that when the loading of Co9S8 was 10% of the mass of CdS, the composite had the best hydrogen production rate of 18.72 mmol·g-1·h-1, which was about 16 times that of CdS.In addition, the composite also showed good cycle stability, and the performance did not decrease significantly in the continuous 12-hour photocatalytic hydrogen production test. Finally, the charge transfer mechanism of the material was discussed. Based on the analysis of the characterization results of transient photocurrent, EIS and PL, it was concluded that the composite CdS-Co9S8 one-dimensional heterojunction structure can significantly improve the migration and separation efficiency of photogenerated electron-hole pairs, thereby it had excellent performance of photocatalytic hydrogen production.
Keywords: CdS; Co9S8; one-dimensional material; photocatalytic hydrogen production
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