氧化鐵奈米缐之製備及其特性研究

Study on the Preparation and Properties of Iron Oxide Nanowires

盧冠勳(Kuan-hsun Lu)

指導教授 ： 劉偉隆

國立虎尾科技大學/工程學院/材料科學與綠色能源工程研究所/碩士(2010年)

摘要

本研究主要在鏡面鐵基材上，於硫酸鹽浴中以次磷酸鈉做為還原劑無電鍍一層鈷、鎳薄膜，再將鍍有鈷、鎳薄膜的試片，置入高溫爐管中施以高溫處理，持溫30分鐘，並於持溫期間通入水氣、氧氣、甲烷，以化學氣相沉積方式成長氧化鐵奈米線。最後改變無電鍍鈷、鎳時間，持溫溫度，載水氮氣、氧氣、甲烷的通量，以及載水氮氣溫度，以田口法L18直交表找出成長氧化鐵奈米線最佳參數。再以掃描式電子顯微鏡(SEM)、能量分散光譜儀(EDS)、X 射線繞射儀(XRD)、震盪樣品測磁儀進行試片表面形貌、成分、結構、磁滯曲線之分析。於SEM圖中，我們發現，無電鍍鎳180秒，持溫650℃，氧氣、甲烷、水氣通量各為100 sccm、25 sccm 150 sccm，水氣溫度為25℃，此時所成長的氧化鐵奈米線，數量較多，且直徑也較細，故我們將此參數，再做細部調整，以找出成長奈米線最理想的參數。由田口法分析中，找出成長奈米線最佳參數為無電鍍鎳薄膜，無電鍍時間30（秒），於高溫爐管內持溫650℃氧氣、甲烷、載水氮氣流量分別為100、25、100（sccm）載水氮氣溫度為30℃。研究中也發現，當持溫溫度於850℃時，不會生長氧化鐵奈米線，故推論，當溫度達到850℃時，氧氣會與甲烷產生反應，導致氧氣不與基材產生反應，生長出氧化鐵奈米線。

關鍵字

無電鍍 ； 化學氣相沉積 ； 氧化鐵奈米線

並列摘要

This study is to prepare iron oxide nanowires by chemical vapor deposition method. Taguchi method was used to find the optimal growth paramedics. In the process for the preparation of iron oxide nanowires , the iron substrate was first coated a film of electroless Co or Ni metal as catalyst, and them put into a growth furnace to grow iron oxide nannowires, under a growth atmosphere of water vapor, O2, CH4, and N2. The growth time was kept for 30 min. In Taguchi method, kinds of catalyst film, thicknesses of catalyst film, growth temperatures, flow rates of H2O(g), O2, and CH4, and temperatures of H2O(l) were selected as the parameters. The prepared iron oxide nanowires were observed and analyzed by using scanning electron microscope, energy dispersive spectroscopy, X-ray diffraction and vibrating sample magnetometer . The results showed that a relatively large quantity of iron oxide nanowires can be grown under condition of electroless Ni film coated for 180 seconds, growth temperatures of 650℃, O2, CH4, and H2O vapor with 100, 25, and 100 sccm respectively, and water temperature of 30℃. The iron oxide nanowires could not be grown at growth temperature of 850℃, because at this temperature O2 would react with CH4, therefore, there is no O2 residual for the growth of iron oxide nanowire.

並列關鍵字

electroless ； chemical vapor deposition ； iron oxide nanowires

參考文獻

6.梁家綺，“三氧化二鐵奈米線之氧缺陷濃度及其特性研究”，國立清華大學材料科學工程學系碩士論文，（2006）

2.T. Ohmori, H. Takahashi, H. Mametsuka, E. Suzuki, Phys. Chem. Chem. Phys. 2 (2000) 3519.

4.ZHAO Yuanbi, QIU Zumin and HUANG Jiaying,“Preparation and Analysis of Fe3O4 Magnetic Nanoparticles Used as Targeted-drug Carriers”, Chinese Journal of Chemical Engineering, 16(3) 451-455 (2008).

5.Li-Ying Zhang, Hong-Chen Gu, Xu-Man Wang,“Magnetite ferrofluid with high specific absorption rate for application in hyperthermia”, Journal of Magnetism and Magnetic Materials 311 (2007) 228–233.

7.Yunyi Fu, Jing Chen, and Han Zhang “Synthesis of Fe2O3 nanowires by oxidation of iron” Chemical Physics Letters, 350, p491–494 (2001).