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有色金属(冶炼部分):2021,(10):66-70
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Ni2+掺杂Cd0.5Zn0.5S固溶体制备及可见光分解水制氢研究
(1.深圳海龙建筑科技有限公司;2.南昌大学化学学院)
Preparation of Ni2+ Doped Cd0.5Zn0.5S Solid Solution and Properties for Splitting Water into Hydrogen under Visible Light
(1.Shenzhen Hailong Construction Technology Company Ltd;2.Nanchang University)
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投稿时间:2021-05-10    修订日期:2021-05-19
中文摘要: 采用水热法制备了Cd0.5Zn0.5S和Ni2+掺杂Ni(m)/Cd0.5Zn0.5S固溶体光催化剂。通过XRD、UV-Vis漫反射光谱和电化学方法表征了催化剂的结构和光电性能,并考查了固溶体在以三乙醇胺为电子给体、可见光(λ≥420 nm)照射下光催化分解水制氢活性。结果表明,Ni2+掺杂后提高了催化剂对可见光的吸收,促进了光生电子—空穴的有效分离,有效提高了Cd0.5Zn0.5S固溶体的光催化制氢活性。当Ni2+的掺杂量为5%(摩尔百分数),反应体系NaOH浓度为0.5 mol/L时,催化剂活性最高,Ni(5)/Cd0.5Zn0.5S制氢活性为纯Cd0.5Zn0.5S固溶体的5倍。催化剂经15 h反应具有良好的稳定性。
中文关键词: Cd0.5Zn0.5S固溶体  Ni2+掺杂  光催化  制氢
Abstract:Cd0.5Zn0.5S and Ni2+ doped Ni(m)/Cd0.5Zn0.5S solid solution photocatalysts were prepared by hydrothermal method. Structure and photoelectric properties of catalyst were characterized by XRD, UV-Vis diffuse reflectance spectroscopy and electrochemical methods. Using triethanolamine as electron donor, photocatalytic activity of solid solution was evaluated by hydrogen evolution from water splitting under visible light (λ≥420 nm) irradiation. It is found that Ni2+ doping improves absorption of visible light by catalyst, promotes effective separation of photo-generated electrons and holes, and effectively enhances photocatalytic hydrogen evolution activity of Cd0.5Zn0.5S solid solution. When doping content of Ni2+ is 5% (mole fraction) and NaOH concentration of reaction system is 0.5 mol/L, catalyst activity is the highest, and hydrogen evolution activity of Ni(5)/Cd0.5Zn0.5S is 5 times that of pure Cd0.5Zn0.5S solid solution. Stability test indicates that catalyst is rather stable during 15 h photoreaction.
文章编号:     中图分类号:    文献标志码:
基金项目:国家自然科学基金资助项目(21962011)
引用文本:
吴琛,赵宝军,王俊,谭鹏,谢志文,徐俊英,彭绍琴.Ni2+掺杂Cd0.5Zn0.5S固溶体制备及可见光分解水制氢研究[J].有色金属(冶炼部分),2021(10):66-70.
WU Chen,ZHAO Bao-jun,WANG Jun,TAN Peng,XIE Zhi-wen,XU Jun-ying,PENG Shao-qin.Preparation of Ni2+ Doped Cd0.5Zn0.5S Solid Solution and Properties for Splitting Water into Hydrogen under Visible Light[J].Nonferrous Metals (Extractive Metallurgy),2021(10):66-70.

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