鎳、鈷共觸媒對二氧化鈦光觸媒的影響;The effect of Nickel and Cobalt cocatalysts on Titanium dioxide photocatalysts

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Title:	鎳、鈷共觸媒對二氧化鈦光觸媒的影響;The effect of Nickel and Cobalt cocatalysts on Titanium dioxide photocatalysts
Authors:	王郁瑩;Wang, Yu-Ying
Contributors:	化學工程與材料工程學系
Keywords:	二氧化鈦;鎳摻雜;鈷摻雜;光觸媒;初濕含浸法;光降解;Titanium dioxide;Ni doping;Co doping;Photocatalyst;Incipient wetness impregnation method;Photocatalytic degradation
Date:	2021-06-23
Issue Date:	2021-12-07 11:11:49 (UTC+8)
Publisher:	國立中央大學
Abstract:	本文研究了鎳和鈷共觸媒對TiO2奈米顆粒光催化性質的影響。在本研究中，以初濕含浸法製備具有 Ni 和 Co 摻雜的 TiO2 ，並通過紫外光照射金屬還原。光觸媒透過 X 光繞射儀、穿透式電子顯微鏡和高解像能電子顯微鏡觀察金屬改質後顆粒的變化。光催化活性反應之鑑定是以 10 ppm 亞甲基藍水溶液 ( 為光反應標準物光降解樣品取樣利用紫外可見光分光光譜儀分析亞甲基藍濃度。由結果表明， 0.05 wt 的 Ni 和 Co 為所有樣品中活性最高，因此Ni和Co含量會影響催化劑的活性。而 Ni和Co金屬原子可能會覆蓋在TiO2的表面並導致活性降低。鍛燒溫度和反應溫度也會影響光催化活性。當催化劑在25度C下以真空烘箱乾燥時， Ni和Co摻雜的 TiO2具有最高的活性。當催化劑在 0℃ 反應時，Ni 和 Co 摻雜的TiO2兩者有最高的活性。;This thesis highlights the effects of nickel and cobalt cocatalyst on the photocatalytic properties of the TiO 2 nanopowders. In this study, the Ni and Co doped TiO 2 with various amounts of dopants were prepared through incipient wetness impregnation m ethod and reduced by ultraviolet light irradiation. The catalysts were characterized by X ray diffraction, transmission electron microscopy and high resolution transmission electron microscopy, to observe the changes of particles after metal modification . The degradation rate of methylene blue (MB) was used to identify the photocatalytic activity under ultraviolet light (UVC) irradiation and the concentration of MB was analyzed by Ultraviolet Visible spectrophotometer . The results show that the N i and Co am ount could influence the activity of the catalyst. The 0.05 wt. % of Ni and Co showed the highest activity among all samples. Overdoes Ni and Co would cover the surface of TiO 2 and resulted in low activity. The calcination temperature and reaction temperat ure also influenced the photocatalytic activity. Ni and Co doped TiO 2 had the highest activity when the catalyst was dri ed at 30 °C in the vacuum oven . Both of Ni and Co doped TiO 2 had the highest activity when the catalyst reacted at 0 °C. The bared TiO2 had the highest activity when the catalyst reacted at 40 °C.
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] Electronic Thesis & Dissertation

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