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              介孔二氧化鈦摻雜氧化鋅及其CO催化氧化研究

              時間:2019-07-22 14:32來源:畢業論文
              通過蒸發誘導自組裝的方法(EISA),制備出了高比表面積和高結晶度的介孔二氧化鈦/氧化鋅。用非離子表面活性劑F127作為模板劑,正硅酸四乙酯和可溶性酚醛樹脂分別作為無機和有機

              摘要:以二氧化鈦為載體負載在納米金催化劑上對CO氧化具有很高的催化活性,但是這種催化劑會因為高溫燒結而失活,不容易通過高溫再生,同時催化劑的反應穩定性不高,因此影響金催化劑的工業應用。在高比表面積的介孔二氧化鈦上摻雜不同的過渡金屬氧化物如氧化鋅,通過沉淀-沉積的方法可以將金納米粒子高度分散到二氧化鈦的孔道和表面上,這樣增加了金催化劑在高溫下的抗燒結能力,同時增加金催化劑的反應穩定性。制備得到的介孔二氧化鈦/氧化鋅為載體負載金納米粒子,用于CO的催化氧化研究。研究結果如下:
              本課題通過蒸發誘導自組裝的方法(EISA),制備出了高比表面積和高結晶度的介孔二氧化鈦/氧化鋅。用非離子表面活性劑F127作為模板劑,正硅酸四乙酯和可溶性酚醛樹脂分別作為無機和有機的前驅體,可溶性酚醛樹脂,六水硝酸鋅和鈦酸四正丁酯分別作為碳,鋅和鈦的來源物質。經過有機-無機協同作用并進一步在600 °C以上的高溫處理,得到了有序介孔TiO2/SiO2/C復合材料,再分別除去碳骨架和二氧化硅模板,制備得到了介孔二氧化鈦/氧化鋅。通過改變這五種物質的摩爾來控制介孔的形成和比表面積,最終獲得了高比表面積(大于300m2/g)的高結晶度介孔二氧化鈦/氧化鋅。用XRD, N2吸脫附圖、掃描電鏡SEM圖來表征。37504
              畢業論文關鍵詞:介孔二氧化鈦;氧化鋅; CO催化氧化;金催化劑
              Mesoporous titanium dioxide doped Zinc Oxide and research the catalytic oxidation of CO
              Abstract:With titanium dioxide as carrier load in nano gold catalysts for CO oxidation has very high catalytic activity, but the catalyst will because of the high temperature sintering and inactivation, not readily pass through high temperature regeneration, and the catalytic stability is not high, therefore the impact of the industrial application of gold catalyst. In the high specific surface area of the mesoporous TiO2 doped with different transition metal oxides such as zinc oxide, by precipitation method of deposition can be gold nanoparticles highly dispersed to TiO2 pore and surface, thus increasing the gold catalyst at high temperature anti sintering ability, and increase the gold catalyst stability in the reaction. The mesoporous titania / zinc oxide loaded gold nanoparticles were prepared for catalytic oxidation of CO .The results were as follows: 源`自^六;維'論.文;網www.kj9998.cn
              In this thesis, the mesoporous titania / zinc oxide with high specific surface area and high crystallinity was prepared by evaporation induced self-assembly method (EISA).Non ionic surfactant F127 as template is tetraethyl orthosilicate (TEOS) and soluble phenolic resin respectively as inorganic and organic precursor, soluble phenolic resin, six water zinc nitrate and tetrabutyl titanate four n-butyl acetate was used as carbon, zinc and titanium material sources. After the organic - inorganic synergistic effect and further in more than 6000C high temperature treatment, the ordered mesoporous TiO2/SiO2/C composite, respectively to remove carbon skeleton and silica templates, prepared by the TiO2/Zn0. By changing the molar of the five substances to control the formation and specific surface area of the mesoporous, the high crystallinity TiO2/Zn0 with high specific surface area (greater than 300m2/g) was obtained.By XRD, N2 adsorption, scanning electron microscopy figure SEM graph representation.
              Keywords: Mesoporous titanium dioxide; Zinc Oxide CO; catalytic oxidation; gold catalyst
              目錄
              1緒論    3
              1.1 研究背景及意義    3
              1.2 二氧化鈦    4
              1.2.1二氧化鈦的性質    4
              1.2.2  二氧化鈦的制備方法    5
              1.3介孔材料    7
              1.3.1介孔材料的合成    7
              1.3.2 介孔材料的制備方法    8 介孔二氧化鈦摻雜氧化鋅及其CO催化氧化研究:http://www.kj9998.cn/huaxue/20190722/36266.html
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