金属纳米颗粒催化剂在氧化反应中的应用
发布时间：2018-11-15 07:35
【摘要】：金纳米颗粒催化剂是目前研究的热门话题,碳材料在近年来的运用也非常广泛,但碳材料需要与金纳米颗粒结合,才能获得良好的光电学性质以及催化性能,并且运用在工业,环境和医学等方面。本文研究是叔丁基过氧化氢作为氧化剂,测试了负载在不同碳材料上的金纳米颗粒(非均相催化剂)的催化活性,主要反应是微波辅助下的1-苯基乙醇的无溶剂氧化反应。本文测试了不同反应条件下催化剂的催化活性。包括不同的反应时间(30-120分钟),不同反应温度(50-150°C),不同催化剂的量(1-5μmol),不同氧化剂的量(5-10 mmol)以及添加剂的量(2.5 mol%)。催化剂是金纳米颗粒(质量百分数为1%)负载在各种碳材料上(活性炭、石墨、碳化硅、碳干凝胶、纳米金刚石和微米金刚石)合成所得,它们是通过两种不同的方法(胶体法和双重浸渍法)制备得到的;催化剂的催化活性应用于1-苯基乙醇的氧化反应,氧化反应的产物为苯乙酮。催化活性最高的催化剂是金纳米颗粒负载在微米金刚石上,合成方法为胶体法,并且反应时间为120分钟,反应温度为150°C,催化剂的量为5μmol以及氧化剂的量为10 mmol时,苯丙酮的产率达到99%;催化活性较低的催化剂是金纳米颗粒负载在碳化硅上,合成方法是双重浸渍法,苯丙酮的产率为27.1%。此外,在每种催化剂最优化条件下,测试催化剂循环利用六次的催化活性,通过实验数据得到通过胶体法制备的金纳米颗粒负载在微米金刚石的催化活性与其它几种金纳米颗粒的催化活性相比,它在反应循环中能维持更高的活性。此外,实验还测试了负载在碳纳米管上的铜纳米颗粒的染料降解性能。
[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 掳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 掳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.
【学位授予单位】：武汉纺织大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O643.36
[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 掳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 掳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.
【学位授予单位】：武汉纺织大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O643.36
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