本研究係以氯化銅及氯化錫作為前驅鹽,並以四乙基硼氫化銨為 還原劑,利用化學還原法以逐步還原的方式製備核殼型銅錫奈米粒 子。文中將先探討製備奈米銅之最適化條件,再進行核殼型銅錫奈米 粒子製備之實驗。實驗所得到之產物以粒徑分析儀、超高解析真空場 發射式掃描電子顯微鏡、高解析穿透式電子顯微鏡觀察粒子粒徑與表 面/剖面形態,並利用紫外光-可見光光譜儀觀察粒子之光學性質, 最後以X 射線粉末繞射儀、X 光能量分散光譜儀及X 射線光電子能 譜儀量測粒子晶相與組成元素。 根據研究結果顯示,適當控制還原劑與前驅鹽的濃度,便能在室 溫下製備出粒徑約30~40 nm 之核殼型銅錫奈米粒子,且不需加入任 何的分散劑與保護劑,便能使粒子均勻地分散在介質中。
In this study, we use copper(II) chloride and tin(II) chloride as precursors and tetraethylammonim borohydride as a reduction agent to prepare copper-tin core shell nanoparticles. Copper-tin core shell bimetallic nanoparticles were formed with a novel reduction agent, and were characterization by DLS, UHR-SEM, HR-TEM, XRD, EDS, XPS, and UV-Vis analyses. Based on our results, copper-tin core shell nanoparticles could be generated by step by step solution phase reduction under properly adjusting concentrations of precursors and reducing agent. The size of copper-tin core shell particles are measured to be about 30-40 nm. The core shell nanoparticles are determined to be homogeneously dispersed in the solution without addition of steric stabling agents.