银纳米棒的醇热法合成与性能表征  

Preparation and Performance Characterization of Ag Nanorods by Alcohol-hydrothermal Method

作　　者：魏智强[1,2] 徐可亮 武晓娟[1] 武美荣 杨华[1,2] 姜金龙[2] 

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,兰州730050 [2]兰州理工大学理学院,兰州730050

出　　处：《人工晶体学报》2015年第4期1031-1035,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51261015);甘肃省自然科学基金(1308RJZA238)

摘　　要：采用醇热法在多元醇体系下加入微量氯化钠,以硝酸银为银源,聚乙烯吡咯烷酮(PVP)为分散剂成功合成了银纳米棒。采用X射线衍射仪(XRD),透射电子显微镜(TEM),X射线能量色散分析仪(XEDS)和紫外-可见吸收光谱仪对所制备的样品进行了表征。结果表明,所制备的银纳米棒为结晶良好的面心立方结构,没有杂峰出现,晶格畸变表现为晶格收缩。样品为一维棒状结构,直径大约在几十纳米至200 nm之间,长度分布在几个微米至十几微米范围,分散性良好,长径比较高。样品的纯度比较高,在397 nm和350 nm处出现了两个表面等离子体共振吸收峰。并分析了银纳米棒的形成机理。The silver nanorods were synthesized by alcohol-hydrothermal method under the polyhydric alcohol system combined with traces of sodium chloride, using silver nitrate（ Ag NO3） and polyvinylpyrrolidone（ PVP） act as the silver source and dispersant,respectively. The products were characterized by XRD,TEM,XEDS and UV-Visible absorption spectroscopy. The results show that the crystal structure of the as-prepared Ag nanorods are fcc structure, with no other impurity phase appearing,and the lattice distortion is contractive. The morphology of the samples are single-dimensional nanorods with good dispersion,with the diameters about tens of nanometers to 200 nm; the lengths distribute in several micron to scores of micron,and the length to diameter ratio is very high. The purity of the sample is relatively high. There are two surface plasma resonance absorption peaks in 397 nm and350 nm. The generation mechanism of Ag nanorods was also analyzed.

关 键 词：银纳米棒 醇热法 晶体结构 形成机理 

分 类 号：TG146.32[一般工业技术—材料科学与工程]