正三角板狀的銠金屬奈米粒子的製備與鑑定

Preparation and Characterization of Rhodium Triangular Nanoplates

方健璋(chien-chang Fang)

指導教授 ： 吉凱明

國立中正大學/理學院/化學暨生物化學系/碩士(2015年)

摘要

自從十九世紀發現銠金屬至今，銠金屬廣泛用於鍍膜材料及觸媒轉化器。科學家對於銠金屬在催化上的應用十分感興趣，隨著奈米科技的流行，各種不同形狀的銠奈米粒子也相繼被合成出來。依文獻報導，合成銠奈米粒子大部分使用醇類當作還原劑，還原銠金屬鹽類。反應藉由穩定劑的加入，來控制粒子大小及形狀。
本篇使用金屬前驅物(acac)Rh(CO)2，溶於有機溶劑n-octylamine利用加熱裂解的方式，合成銠奈米粒子。選用TOPO 當作界面活性劑，反應溫度為140oC時，成功合成出樹枝狀結構的銠金屬奈米粒子，反應溫度為180oC時，可合成出橢圓狀的銠金屬奈米粒子。更換界面活性劑為油酸，不加以攪拌，可合成出雙六角錐柱狀的銠奈米粒子。使用橢圓狀銠奈米粒子當作晶種，加入金屬前驅物與界面活性劑-油酸，可合成出三角板狀的銠金屬奈米粒子。在銠金屬奈米粒子的檢測方面，主要是利用穿透式電子顯微鏡(TEM)、X光粉末繞射儀(XRD)、能量散射儀(EDS)、電子繞射(ED)等儀器進行結構的鑑定。

關鍵字：雙六角錐柱，三角板

關鍵字

雙六角錐柱 ； 三角板

並列摘要

Rhodium has wide application in coating materials and catalytic converters since its discovery in 19th century. Scientists were interested in the application of rhodium in the field of catalysis. Different shapes of rhodium nanoparticles also have been synthesized. Rhodium nanoparticles were synthesized by reducing the metal salts with alcohols according to the literatures. The particle size and shape were controlled by adding stabilizing agents.
We used (acac)Rh(CO)2 as organometallic precursor to synthesize rhodium nanoparticles in n-octylamine by thermal decomposition method. We used TOPO as surfactant to synthesize the brenching structure at 140oC and the oval-shape nanoparticles at 180oC. Hexagonal bipyrimidal-shape rhodium nanoparticles were synthesized by heating the mixture of organimetallic precursor and oleic acid as surfactant at 180oC without stirring. Rhodium triangle nanoplates were synthesized by heating the mixture of organimetallic precursor, oleic acid and seeds which were oval-shape nanoparticles at 180oC. We used transmission electron microscope, energy dispersive spectroscope, X-ray powder diffractometer, electron diffractometer to analyze the structures of nanoparticles.
key word : triangle nanoplates, hexagonal bipyrimidal-shape

並列關鍵字

hexagonal bipyrimidal-shape ； triangle nanoplates

參考文獻

11. 張士欣、王崇人，“金屬奈米粒子的吸收光譜” 化學， 1999， 56，209~222.

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