國立高雄大學圖資館 |

合成具高度優選方向性之毛線球狀氧化鎢奈米線及其應用 = Synthesis and application of high-oriented crystalline yarn-ball-like tungsten oxide nanowires

Record Type:	Language materials, printed : monographic
Paralel Title:	Synthesis and application of high-oriented crystalline yarn-ball-like tungsten oxide nanowires
Author:	張汶慧,
Secondary Intellectual Responsibility:	國立高雄大學
Place of Publication:	[高雄市]
Published:	撰者;
Year of Publication:	2012[民101]
Description:	99面圖，表格 : 30公分;
Subject:	氧化鎢
Subject:	tungsten oxide
Online resource:	http://handle.ncl.edu.tw/11296/ndltd/25185469663230370943
Notes:	106年10月31日公開
Notes:	參考書目：面80-84
Summary:	氧化鎢 (Tungsten oxide) ，WO3-x，由於擁有特殊的化學性質及物理性質，如：光催化特性、感測性質、電致變色性質、熱電性質、鐵電性質、場放電性質及氣致變色性質等，近幾年來吸引很多研究者探討此材料。氧化鎢在室溫下同時有許多不同且穩定的晶相，且氧化鎢具形貌的多樣性，因此促使其有更寬廣的應用，並大幅提升其性質。本研究以溶劑熱法合成具結晶性的氧化鎢。起始劑為氯化鎢和異丙醇，在不加入任何添加劑的情況下，合成出具有特殊形態的氧化鎢。再將所得之特殊形態氧化鎢熱處理之。所得產物利用粉末X-ray繞射儀、穿透式電子顯微鏡、掃描式電子顯微鏡、顯微拉曼光譜儀、傅利葉轉換紅外線光譜儀及比表面積來鑑定之。由研究結果得知：直接利用溶劑熱法所合成之氧化鎢，所得產物之形貌為寬度 5-15奈米、長度為數十微米之毛線球狀奈米線。接著將毛線球狀的氧化鎢進行熱處理，產物轉變為20-80奈米奈米顆粒聚集塊之。而本研究中的氧化鎢成長過程、可分成兩個部分：第一部份氧化鎢奈米線的成長為奧斯華熟化機制；第二部份為奈米顆粒聚集塊的產生是融合過程。進一步研究產物之感測特性，發現經傳統熱處理400 oC所得之產物，在室溫下對NO氣體感測信號高達70.3，可做為優異的感測材料。 In recent years, tungsten oxide (WO3-x) has attracted the interest of researchers because of its unique chemical and physical properties, such as its photocatalyst activity and sensor, electrochromic, thermoelectric, ferroelectric, field electron emission, and gaschromic properties. At room temperature, tungsten oxide can exist in several stable crystalline states; its diverse morphology also promotes wider applications and can enhance its properties. This study examines the specific tungsten oxide produced during the crystalline phases of tungsten oxide using the solvothermal method without an assistant agent, but with the precursors WCl6 and 2-propanol. This unique form of tungsten oxide then underwent heat treatment and the products obtained were classified using X-ray diffractometer, Transmission electron microscopy, Scanning electron microscopy, Micro-Raman spectroscopy, Fourier transform infrared spectroscopy and Surface area porosity analyser. The study results show that the product obtained using tungsten oxide treated with the solvothermal method has a morphology of yarn-ball-like nanowires, with a width of 5 to 15 nm and a length of tens of micrometres. After the yarn-ball-like tungsten oxide underwent heat treatment, the product was transformed into nanoparticle lumps; the size of the nanoparticles was 20 to 80 nm. The growth process of tungsten oxide can be divided into two parts. The first part is the growth of tungsten oxide nanowires, known as Ostwald ripening. The second part is the formation of nanoparticle lumps, known as the fusion process. Further research on the sensing characteristics of products show that products obtained under a conventional heat treatment 400oC at room temperature, have a NO gas sensing selectivity of up to 70.3, making them excellent sensing materials.

合成具高度優選方向性之毛線球狀氧化鎢奈米線及其應用 = Synthesis and application of high-oriented crystalline yarn-ball-like tungsten oxide nanowires
張, 汶慧

合成具高度優選方向性之毛線球狀氧化鎢奈米線及其應用 = Synthesis and application of high-oriented crystalline yarn-ball-like tungsten oxide nanowires / 張汶慧撰 - [高雄市] : 撰者, 2012[民101]. - 99面 ; 圖，表格 ; 30公分.
106年10月31日公開參考書目：面80-84.
氧化鎢tungsten oxide

合成具高度優選方向性之毛線球狀氧化鎢奈米線及其應用 = Synthesis and application of high-oriented crystalline yarn-ball-like tungsten oxide nanowires
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