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文章编号:1672-6987(2026)03-0056-11;DOI:10. 16351/j. 1672-6987. 2026. 03. 007
李思影,王丽萍,黎艳艳,林海峰* ,王 磊 (青岛科技大学 化学与分子工程学院,山东 青岛 266042)
摘 要:通过溶剂热法结合光照沉积反应制备了一种独特的 CdS/ZnS-Ni(OH)2自组装纳米 花光催化剂。利用X-射线衍射(XRD)、透射和高分辨透射电镜(TEM,HRTEM)、X-射线光 电子能谱(XPS)、电子顺磁共振(EPR)和荧光光谱(PL)等各种测试对光催化剂进行了表征。 在可见光(λ > 400 nm)辐照下,CdS/ZnS-Ni(OH)2复合物表现出了优良的光解水产氢活性, 最高产氢速率可达 36. 38 mmol ·(g · h)−1 ,其在 400 和 420 nm 单色光下的产氢表观量子效率 (AQE)分别为 36. 5% 和 31. 9%,远优于 Pt 负载的CdS 纳米花以及大部分报道过的 CdS 基光 催化剂。而且,长时间和循环产氢测试证实 CdS/ZnS-Ni(OH)2具有良好的光催化稳定性。 CdS/ZnS-Ni(OH)2复合物卓越的光催化性能主要来源于以下 3 个方面:1)纳米花结构通过多 次的反射和散射作用增强光俘获效率;2)较大的比表面积加速表面反应的动力学;3)p-n 异质 结和 S, Zn 空位协同作用赋予的高效光生载流子分离过程。
关键词:p-n 异质结; S, Zn 空位;电荷分离;自组装纳米花;光催化产氢
中图分类号:TQ 207+. 2 文献标志码:A
引用格式:李思影,王丽萍,黎艳艳,等 . 通过 S, Zn 空位和 p-n 异质结的协同作用显著增强 CdS/ZnS-Ni(OH)2纳米花的可见光产氢性能[J]. 青岛科技大学学报(自然科学版),2026,47 (3):56-66.
LI Siying, WANG Liping, LI Yanyan, et al. Evidently-promoted visible-light photocatalytic H2-evolving property of CdS/ZnS-Ni(OH)2 nanoflowers via the synergy of S, Zn vacancies and p-n heterojunction[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition),2026,47(3):56-66.
Evidently-Promoted Visible-Light Photocatalytic H2-Evolving Property of CdS/ZnS-Ni(OH)2 Nanoflowers via the Synergy of S, Zn Vacancies and p-n Heterojunction
LI Siying,WANG Liping,LI Yanyan,LIN Haifeng,WANG Lei (College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042,China)
Abstract:Unique CdS/ZnS-Ni(OH)2 self-assembled nanoflowers were prepared through a solvothermal method combined with photo-deposition reaction. The photocatalysts were char⁃ acterized by various technologies,including X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution TEM (HRTEM), X-ray photo-electron spectroscopy (XPS), electron paramagnetic resonance (EPR), and photoluminescence spectroscopy (PL), etc. Under visible-light irradiation (λ > 400 nm), the CdS/ZnS-Ni(OH)2 composites exhib⁃ ited an excellent photocatalytic H2 production activity,reaching the maximum H2-evolving rate of 36. 38 mmol ·(g · h)−1 , with the corresponding apparent quantum efficiency of 36. 5% and 31. 9% at 400 and 420 nm, respectively, far superior to that of Pt-loaded CdS nanoflowers and most reported CdS-based photocatalysts. Moreover, the long-term and cycling H2 evolution tests confirmed the good photocatalytic stability of CdS/ZnS-Ni(OH)2. The distinguished pho⁃ tocatalytic performance of CdS/ZnS-Ni(OH)2 could originate mainly from following three aspects:1) Enhanced light harvesting of nanoflower architecture via multiple reflection and scattering of incident light;2) Accelerated surface reaction kinetics caused by the larger spe⁃ cific surface area;3) Efficient photo-carriers separation process enabled by the synergy of p-n heterojunction and S, Zn vacancies.
Key words:p-n heterojunction; S, Zn vacancies; charge separation; self-assembled nanoflow⁃ ers;photocatalytic hydrogen production
收稿日期:2025-10-02
基金项目:国家自然科学基金项目(22179068,52272222,52072197);山东省自然科学基金项目(ZR2019JQ14).
作者简介:李思影(1998—),女,硕士研究生 . * 通信联系人 .