羟基离子液体中单晶金纳米片的制备与表征（英文）

摘要

羟基功能化离子液体氯化1-（3-羟丙基）-3-甲基咪唑中,微波加热还原HAuCl4.4H2O制备了多边形单晶金纳米片,制备过程不需要额外添加包覆剂。产物用扫描电镜、透射电镜、选区电子衍射、能谱、X射线衍射和紫外可见分光光度计等进行了表征。产物的形状和大小可以通过控制反应条件如反应温度、反应物浓度等进行控制。50毫克HAuCl4.4H2O溶解于1毫升羟基功能化离子液体中,在140℃进行还原反应时,得到平面尺寸达16微米,厚度约为35纳米的单晶金纳米片。在单晶金纳米片的制备反应中,离子液体氯化1-（3-羟丙基-）3-甲基咪唑同时起到了反应介质、还原剂和包覆剂的作用。%Large single-crystalline polygonal Au nanoplates have been successfully prepared by reduction of HAuC14 4H20 in an alcohol ionic liquid, 1-（ 3-hydroxylpropyl ）-3-methylimidazolium chloride （[C3OHmim]＋ Cl-）, by using microwave heating without any additional capping agent. Scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, selected area electron diffraction （SAED）, energy-dispersive X-ray spectroscopy （EDS）, X-ray diffractometry （XRD） and UV-Vis spectroscopy have been used to characterize the products. The shape and size of the gold particles can be controlled by reaction conditions such as temperature and reagent concentration. When 50 mg HAuCl4 4H2O is reduced in 1 mL [C3OHmim]＋C1- at 140℃, the resulting single-crystalline nanoplates have a plane dimension of over 16 μm and a thickness of about 35nm. [C30Hmim]＋ C1- acts as a reaction medium, reducing agent and capping agent.