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以硝酸银为前驱物,聚乙烯醇缩丁醛(PVB)为结构导向剂,通过醇热法,反应温度为140℃,反应时间为24 h的条件下制备了银纳米线.采用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、热重分析(TG)、红外光谱(FT-IR)和激光拉曼光谱(Raman)等手段对产物进行了系统表征,结果表明:所得银纳米线具有面心立方结构,沿着(111)晶面生长,具有单晶结构;考察了反应温度和时间对产物形貌的影响,结果表明:反应温度和时间在形成银纳米线的过程中起着关键的作用;银纳米线具有较强的表面增强拉曼散射效应;同时提出了银纳米线可能的晶化机理.
Silver nanowires were prepared by using silver nitrate as the precursor and polyvinyl butyral (PVB) as the structure-directing agent through an alcohol thermal method at a reaction temperature of 140 ℃ and a reaction time of 24 h.Using X-ray diffraction The products were systematically characterized by XRD, SEM, TEM, TG, FT-IR and Raman spectroscopy. The results showed that: The obtained silver nanowires have a face-centered cubic structure and grow along the (111) crystal plane with a single crystal structure. The effects of reaction temperature and time on the morphology of the product were investigated. The results show that the reaction temperature and time Silver nanowires have strong surface-enhanced Raman scattering effect; at the same time, the possible crystallization mechanism of silver nanowires is proposed.