製備Ag-Fe3O4複合奈米粒子之研究

Synthesis of Ag-Fe3O4 composite nano-particles

郭英傑(Ying-Jeng Kuo)

指導教授 ： 王宏文

中原大學/理學院/化學研究所/碩士(2009年)

https://doi.org/10.6840/cycu200900149

摘要

本論文提出以簡單快速的方式，合成Ag-Fe3O4磁性奈米粒子之研究。本實驗利用共沈法合成Ag-Fe3O4磁性奈米粒子，藉由改變濃度及不同的保護劑來控制粒子大小。利用XRD、UV、TEM觀察Ag-Fe3O4磁性奈米粒子的成份及結構，以VSM量測Ag-Fe3O4磁性奈米粒子的磁性。
製備Ag-Fe3O4磁性奈米粒子使用兩種製程方法，方法一以Ag+離子氧化Fe2+離子，形成Fe2+與Fe3+共存溶液後，再以鹼液共沈合成Ag-Fe3O4磁性奈米粒子。方法二以微波水熱法或共沈法製備Fe3O4磁性奈米粒子後，再以共沈法製備Ag-Fe3O4磁性奈米粒子。實驗結果以微波水熱法或共沈法製備Fe3O4磁性奈米粒子後，再以共沈法製備Ag-Fe3O4磁性奈米粒子其性能表現最佳，其粒徑可達10±5nm。

關鍵字

Ag-Fe3O4磁性奈米粒子 ； 共沈法

並列摘要

Synthesis of Ag-Fe3O4 magnetic nanoparticles is carried out by coprecipitation method. The size of Ag-Fe3O4 magnetic nanoparticles is controlled by changing solution’s concentration and different preserver. The component and microstructure of Ag-Fe3O4 magnetic nanoparticles was characterized by XRD, UV, TEM, and EDS. The superparamagne- tism of Ag-Fe3O4 magnetic nanoparticles s was confirmed with a VSM.

Synthesis of Ag-Fe3O4 magnetic nanoparticles was accomplished in two methods. Method one is Chemical reduction and oxidation. Silver ions were used as oxidation agent to oxidize ions of Fe(II) to form a solution containing both Fe(II) and Fe(III) ions. After precipitation with ammonia hydroxide, magnetic nanoparticles containing silver metals were obtained. Method two is synthesis of Fe3O4 magnetic nanoparticles using the microwave hydrothermal or coprecipitation method, then Synthesis of Ag-Fe3O4 magnetic nanoparticles were prepared by reducing silver nitrate on the surface of Fe3O4 nanoparticles using the coprecipitation method. Method two results in better efficiency than those of method one. The best size we obtained in this study is 10±5nm.

並列關鍵字

magnetic nanoparticles

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