微乳法制备纳米金及其生物电催化性能研究
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摘要
纳米金具有特殊的电催化性能。采用水/AOT(2-乙基己基琥珀酸酯磺酸钠)/环己烷微乳体系制备纳米金颗粒,通过改变水与AOT的物质的量比(ω)制备不同尺寸的纳米金,并通过透射电镜、紫外分光光度计、电化学工作站对纳米金颗粒的形貌尺寸、紫外吸收光谱、电化学性能进行分析与研究。结果表明,纳米金呈球形,尺寸均一,单分散性较好。通过对纳米金颗粒电催化析氢性能的测试发现,纳米金粒子分散性较好,形成的是均相溶液,纳米金粒子与Pt/C相比电催化性能稍弱,但是与纳米银、金铁合金和纳米硒化钨相比都显现出较好的电催化活性,说明纳米金粒子具有比较优良的电催化性能,为纳米金颗粒在生物电催化领域的应用奠定理论基础。
Gold nanoparticles(AuNPs)have special electrocatalytic performance.In this paper,AuNPs were prepared by water/AOT/cyclohexane microemulsion system.AuNPs of different sizes were prepared by changing the molar ratio of water to AOT(ω).The morphology and size,ultraviolet absorption spectrum and electrochemical properties of AuNPs were analyzed and studied by transmission electron microscope(TEM),ultraviolet spectrophotometer and electro-chemical workstation.The result showed that AuNPs were spherical,with size uniformity and good monodispersity.The test of electrocatalytic hydrogen analysis on AuNPs showed that AuNPs had a good dispersion with a homogeneous solution.The electrocatalytic activity of AuNPs was not as good as Pt/C electrode,but better than that of silver nanoparticles,gold-iron nano-alloy and nano-tungsten selenide,which indicated that the AuNPs had better electrocatalytic performance.This laid the theory foundation of AuNPs in bioelectricity catalytic application.
Gold nanoparticles(AuNPs)have special electrocatalytic performance.In this paper,AuNPs were prepared by water/AOT/cyclohexane microemulsion system.AuNPs of different sizes were prepared by changing the molar ratio of water to AOT(ω).The morphology and size,ultraviolet absorption spectrum and electrochemical properties of AuNPs were analyzed and studied by transmission electron microscope(TEM),ultraviolet spectrophotometer and electro-chemical workstation.The result showed that AuNPs were spherical,with size uniformity and good monodispersity.The test of electrocatalytic hydrogen analysis on AuNPs showed that AuNPs had a good dispersion with a homogeneous solution.The electrocatalytic activity of AuNPs was not as good as Pt/C electrode,but better than that of silver nanoparticles,gold-iron nano-alloy and nano-tungsten selenide,which indicated that the AuNPs had better electrocatalytic performance.This laid the theory foundation of AuNPs in bioelectricity catalytic application.
引文
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2 杜中玉,许瑞,孔令栋.微乳液结构及其应用[J].济宁医学院学报,2014,37(4):235.
3 梅鑫东,章明.纳米材料的性质、制备以及在化工生产中的应用[J].江西化工,2006,22(2):5.
4 Yasuhiro H,Chie K,Atsushi H,et al.Preparation of poly(ethylene glycol)-modified poly(amido amine)dendrimers encapsulating gold nanoparticles and their heat-generating ability[J].Langmuir,2007,23(10):5243.
5 Holger A,Stefan K.Sulfated zirconia nanoparticles synthesized in reverse microemulsion:Preparation and catalytic propertise[J].Langmuir,2002,18(20):7428.
6 张帆.盐酸小檗碱纳米金光敏脂质体的制备及其性质研究[D].南京:南京师范大学,2010.
7 陈亭汝,张玮,孟祥英,等.纳米金溶胶的合成及紫外-可见吸收光谱的研究[J].应用化工,2009,38(9):1273.
8 尹力兵.Au-Pt纳米粒子的制备及对重金属离子检测的研究[D].武汉:武汉理工大学,2012.
9 吕存财.半导体纳米材料的制备及其电催化析氢性能的研究[D].镇江:江苏大学,2015.
10 刚建航,董博华,赵稳稳,等.硒化钨花状纳米晶的可控合成及电催化产氢性能研究[J].人工晶体学报,2016,45(8):2039.