ZnS微纳结构制备及其电化学特性研究

发布时间：2018-04-10 18:42

  本文选题：ZnS + 形貌　； 参考：《长春理工大学》2017年硕士论文

【摘要】：ZnS具有独特的光学、电学及催化性能。微纳米尺度下ZnS又具有形貌可控、比表面积大、电子迁移率高等优势,因此可用作电化学电极材料。本文围绕ZnS电化学电极性能构建及影响因素开展了研究,具体结果如下:(1)以水热法制备三种形貌的ZnS材料并分析了其发光特性。发现325nm激发下,闪锌矿的ZnS纳米颗粒和微米块分别呈现弱的缺陷发光和强的带边紫外发光,而纤锌矿ZnS毛线球因带隙较宽导致325 nm激发下不发光。(2)以ZnS材料构建电化学电极,研究形貌对电化学特性影响的机理。发现ZnS毛线球电极中电子传导速率最快,电化学性能最佳,证明了比表面积和晶体结构是形貌对ZnS材料电化学特性影响的根本原因。(3)制备了ZnO/ZnS复合材料电极并研究其电化学特性。发现ZnO/ZnS复合材料电极电化学特性比ZnO更优异,进一步证明了ZnS材料电化学电极具重要应用价值。
[Abstract]:ZnS has unique optical, electrical and catalytic properties.ZnS has the advantages of controllable morphology, large specific surface area and high electron mobility, so it can be used as an electrochemical electrode material.In this paper, the structure of ZnS electrochemical electrode and its influencing factors were studied. The results are as follows: 1) three morphologies of ZnS materials were prepared by hydrothermal method and their luminescence characteristics were analyzed.It is found that the ZnS nanoparticles and microns of sphalerite exhibit weak defect luminescence and strong band edge ultraviolet luminescence under 325nm excitation, while wurtzite ZnS wool spheres exhibit no luminescence under 325nm excitation due to wide band gap.The influence of morphology on electrochemical properties was studied.It is found that the electron conduction rate is the fastest and the electrochemical performance is the best in the ZnS wool ball electrode.It is proved that specific surface area and crystal structure are the fundamental reasons for the influence of morphology on the electrochemical properties of ZnS materials.It is found that the electrochemical characteristics of ZnO/ZnS composite electrode are better than that of ZnO, which further proves that the electrochemical electrode of ZnS material has important application value.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ132.41

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