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题名	五氧化二钒薄膜的溶胶凝胶法制备与性质研究; The preparation and character research of Vanadium pentoxide thin films by sol-gel
作者	甄恩明
学位类别	硕士
答辩日期	2009-05-31
授予单位	中国科学院广州能源研究所
授予地点	广州能源研究所
导师	徐刚
关键词	五氧化二钒薄膜 溶胶凝胶 二乙酰丙酮氧钒 c轴生长 非晶衬底
其他题名	The preparation and character research of Vanadium pentoxide thin films by sol-gel
中文摘要	Vanadium oxides have been studied because of its some important properties. Vanadium pentoxide has been used widely as its fine catalytic properties. Meanwhile, Vanadium pentoxide also has fine electrochemical property. Theoretically a Vanadium atom in Vanadium pentoxide crystal can accept two Li ions. Vanadium pentoxide is an attractive cathode material in high capacity Li ions rechargeable battery. Vanadium pentoxide can be also used as ions storage layer in Electrochromic devices. Vanadium pentoxide thin films were obtained in this subject by sol-gel method. The precursors in this project are Vanadium pentoxide powder and Vanadyl acetylacetonate. First, we prepare inorganic sol and organic sol by Vanadium pentoxide powder and Vanadyl acetylacetonate respectively. Then the gel thin films were prepared by dip-coating and spin-coating. Gel films were heat treated at definite conditions and Vanadium pentoxide thin films were synthesized. The properties of Vanadyl acetylacetonate sol was analyzed by FT-IR and DG-DSC. The Crystallinity and optical property of Vanadium pentoxide thin films were analyzed by X-ray diffraction, FT-IR spectrum and UV-VIS-NIR spectrum. The DG-DSC analysis reveals that Vanadyl acetylacetonate decomposes at 250oC and 300oC in nitrogen ambience and air respectively. In this subject, the heat treatment temperature was choosen between 350-550oC. Polycrystalline Vanadium pentoxide thin films were synthesized by heat treating Vanadyl acetylacetonate gel films in air and nitrogrn ambience. Amorphous Vanadium pentoxide thin films were synthesized by heat treating Vanadyl acetylacetonate gel films in argon and hydrogen misture ambience and purified nitrogen ambience. Polycrystalline Vanadium pentoxide thin films synthesized in this object have highly c-axis oriented nano V2O5 structures with grain diameter ranging from 21nm to 45nm. Polycrystalline Vanadium pentoxide thin films grow perpendicularly to the substrate. The optical band gap of Vanadium pentoxide thin films is between 2.0-2.4ev. The adhesion of Vanadium pentoxide thin films becomes stronger when the oxygen pressure increases in heat treatment atmosphere. The Vanadium pentoxide thin films obtained in air can shed after surface wetting. While the Vanadium pentoxide thin films obtained in nitrogen can bear grinding. The color of Vanadium pentoxide thin films varies from light yellow to light green as the oxygen pressure decrease in heat treatment atmosphere.
语种	中文
公开日期	2011-07-14 ; 2011-07-15
页码	77
内容类型	学位论文
源URL	[http://ir.giec.ac.cn/handle/344007/5868]
专题	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	甄恩明. 五氧化二钒薄膜的溶胶凝胶法制备与性质研究, The preparation and character research of Vanadium pentoxide thin films by sol-gel[D]. 广州能源研究所. 中国科学院广州能源研究所. 2009.

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