【摘要】：金納米顆粒催化劑是目前研究的熱門話題,碳材料在近年來的運(yùn)用也非常廣泛,但碳材料需要與金納米顆粒結(jié)合,才能獲得良好的光電學(xué)性質(zhì)以及催化性能,并且運(yùn)用在工業(yè),環(huán)境和醫(yī)學(xué)等方面。本文研究是叔丁基過氧化氫作為氧化劑,測試了負(fù)載在不同碳材料上的金納米顆粒(非均相催化劑)的催化活性,主要反應(yīng)是微波輔助下的1-苯基乙醇的無溶劑氧化反應(yīng)。本文測試了不同反應(yīng)條件下催化劑的催化活性。包括不同的反應(yīng)時(shí)間(30-120分鐘),不同反應(yīng)溫度(50-150°C),不同催化劑的量(1-5μmol),不同氧化劑的量(5-10 mmol)以及添加劑的量(2.5 mol%)。催化劑是金納米顆粒(質(zhì)量百分?jǐn)?shù)為1%)負(fù)載在各種碳材料上(活性炭、石墨、碳化硅、碳干凝膠、納米金剛石和微米金剛石)合成所得,它們是通過兩種不同的方法(膠體法和雙重浸漬法)制備得到的;催化劑的催化活性應(yīng)用于1-苯基乙醇的氧化反應(yīng),氧化反應(yīng)的產(chǎn)物為苯乙酮。催化活性最高的催化劑是金納米顆粒負(fù)載在微米金剛石上,合成方法為膠體法,并且反應(yīng)時(shí)間為120分鐘,反應(yīng)溫度為150°C,催化劑的量為5μmol以及氧化劑的量為10 mmol時(shí),苯丙酮的產(chǎn)率達(dá)到99%;催化活性較低的催化劑是金納米顆粒負(fù)載在碳化硅上,合成方法是雙重浸漬法,苯丙酮的產(chǎn)率為27.1%。此外,在每種催化劑最優(yōu)化條件下,測試催化劑循環(huán)利用六次的催化活性,通過實(shí)驗(yàn)數(shù)據(jù)得到通過膠體法制備的金納米顆粒負(fù)載在微米金剛石的催化活性與其它幾種金納米顆粒的催化活性相比,它在反應(yīng)循環(huán)中能維持更高的活性。此外,實(shí)驗(yàn)還測試了負(fù)載在碳納米管上的銅納米顆粒的染料降解性能。
[Abstract]:Gold nanoparticles catalyst is a hot topic in recent years, carbon materials are also widely used in recent years, but carbon materials need to be combined with gold nanoparticles in order to obtain good photoelectric properties and catalytic performance, and used in industry. Environmental and medical aspects In this paper, the catalytic activity of gold nanoparticles (heterogeneous catalysts) supported on different carbon materials was tested by using tert-Ding Ji hydrogen peroxide as oxidant. The main reaction was the solvent-free oxidation of 1-phenylethanol assisted by microwave. The catalytic activity of the catalyst under different reaction conditions has been tested in this paper. It includes different reaction time (30-120 minutes), different reaction temperature (50-150 擄C), different amount of catalyst (1-5 渭 mol), different oxidant) (5-10 mmol) and amount of additive (2.5 mol%). The catalyst was synthesized from gold nanoparticles (1% by mass) loaded on various carbon materials (activated carbon, graphite, silicon carbide, carbon xerogel, nanocrystalline diamond and micron diamond). They were prepared by two different methods (colloid method and double impregnation method). The catalytic activity of the catalyst was applied to the oxidation of 1-phenylethanol. The product of the oxidation reaction was acetophenone. The catalyst with the highest catalytic activity is gold nanoparticles supported on micron diamond. The synthesis method is colloidal, and the reaction time is 120 minutes, the reaction temperature is 150 擄C, the amount of catalyst is 5 渭 mol and the amount of oxidant is 10 mmol. The yield of phenylacetone was 99%. The catalyst with low catalytic activity is gold nanoparticles supported on silicon carbide. The synthesis method is double impregnation method. The yield of phenylacetone is 27.1g. In addition, under the optimum conditions of each catalyst, the catalytic activity of the six cycles of the catalyst is tested. The experimental data show that the gold nanoparticles prepared by colloid method can maintain higher catalytic activity in the reaction cycle than the other gold nanoparticles. In addition, the dye degradation properties of copper nanoparticles loaded on carbon nanotubes were also tested.
【學(xué)位授予單位】：武漢紡織大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：O643.36

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