tio2/au纳米材料的制备及光催化性能.zip
tio2/au纳米材料的制备及光催化性能,包括开题报告，任务书，ppt，翻译原文和译文摘要iabstractii1 引言11.1 tio2光催化技术发展背景11.2 tio2光催化的基本原理11.2.1 tio2的晶体结构及性质11.2.2 tio2能带结构21.2.3 tio2光催化反应原理31.3 tio2光催化反应研究进展41.3.1 金属离子掺杂51....
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包括开题报告，任务书，ppt，翻译原文和译文
摘 要 I
Abstract II
1 引言 1
1.1 TiO2光催化技术发展背景 1
1.2 TiO2光催化的基本原理 1
1.2.1 TiO2的晶体结构及性质 1
1.2.2 TiO2能带结构 2
1.2.3 TiO2光催化反应原理 3
1.3 TiO2光催化反应研究进展 4
1.3.1 金属离子掺杂 5
1.3.2 非金属元素掺杂 5
1.3.3 贵金属修饰 5
1.3.4 表面光敏化 6
1.3.5 半导体复合 6
1.4 本课题的研究意义及内容 7
2 实验方法 8
2.1 实验步骤 8
2.1.1 实验试剂及设备 8
2.1.2 在不同pH值条件下水热法制备TiO2样品 8
2.1.3 水热法制备掺金量不同的样品 9
2.2 样品检测 10
2.2.1 样品的表征 10
2.2.2 样品的活性测试 10
3 结果与讨论 11
3.1 样品的物相分析 11
3.1.1 样品的XRD检测分析 11
3.1.2 样品的SEM形貌检测 13
3.2 样品的荧光分析 15
3.3 样品的光催化性能测试与分析 16
4 结论 19
参考文献 20
致谢 22
TiO2/Au纳米材料的制备及光催化性能
摘 要
TiO2是颇受重视的一种光催化剂，具有良好的生物和化学性质、活性高、价廉易得、对人体无害等优点。由于TiO2的带隙较宽，只能吸收紫外光，这在一定程度上限制了TiO2的实际应用。本文主要研究了介质pH值对水热法制备的TiO2的影响及Au的含量对TiO2/Au样品在紫外光下对甲基橙光催化降解的影响。以TiCl3为钛源，采用水热制备法，在200 °C的温度下恒温反应20 h，制备得到实验样品。通过XRD测定所制样品的成分及晶型结构；通过SEM对样品进行表征，观察样品的结构、晶粒度等；通过光催化降解甲基橙溶液，检验样品的光催化活性。结果表明：溶液的pH值是影响水热法制备TiO2纳米材料的主要因素之一。碱性溶液条件有利于板钛矿相TiO2的生成，酸性溶液条件有利于金红石相TiO2的形成，中性溶液条件有利于锐钛矿相TiO2的形成；Ti/Au摩尔比为30000:1的样品的光催化性能较好。
关键字：二氧化钛; 表面修饰; 金; 甲基橙; 水热法; 光催化
TiO2/Au Nanomaterials and Photocatalytic Properties
Abstract
TiO2 is a highly regarded photocatalyst, which has good biological and chemical properties, high activity. It is cheap as well as harmless to human body and so on. However, a wide forbidden band of TiO2 can only absorb ultraviolet light, which to some extent limit the practical application of TiO2. Changing the electronic structure of TiO2 by doping is an important technical approach to prepare TiO2 with visible response. The main purpose of this graduation thesis is to study the effects of Au loading on TiO2/Au samples to photocatalytic degrade the methyl-orange under UV light, and the effects of medium pH to prepare TiO2 by hydrothermal synthesis. I use TiCl3 as titanium source, use hydrothermal synthesis and let the reaction happen at 200 °C for 20 h in constant temperature and prepared photocatalyst material of different Au loadings TiO2/Au. I use XRD to determinate the composition and crystal structure of the prepared samples, also the samples were characterized by SEM, by doing these, the structure and the grain size of the sample was observed. and by the experiment of photocatalytic degradation of methyl orange, the photocatalytic activity of the sample was characterize. The results showed that: the pH value is one of the main factors using the hydrothermal to make TiO2 photocatalytic material. Alkaline solution is conducive to the formation of brookite. Acidic solution is conducive to the formation of rutile phase. Neutral solution is conducive to the formation of anatase phase. The photocatalytic properties of the sample is the best when the Ti/Au molar ratio is 30000:1.
Key words: Titanium dioxide; methyl orange; hydrothermal synthesis; gold; surface modification; photocatalytic
摘 要 I
Abstract II
1 引言 1
1.1 TiO2光催化技术发展背景 1
1.2 TiO2光催化的基本原理 1
1.2.1 TiO2的晶体结构及性质 1
1.2.2 TiO2能带结构 2
1.2.3 TiO2光催化反应原理 3
1.3 TiO2光催化反应研究进展 4
1.3.1 金属离子掺杂 5
1.3.2 非金属元素掺杂 5
1.3.3 贵金属修饰 5
1.3.4 表面光敏化 6
1.3.5 半导体复合 6
1.4 本课题的研究意义及内容 7
2 实验方法 8
2.1 实验步骤 8
2.1.1 实验试剂及设备 8
2.1.2 在不同pH值条件下水热法制备TiO2样品 8
2.1.3 水热法制备掺金量不同的样品 9
2.2 样品检测 10
2.2.1 样品的表征 10
2.2.2 样品的活性测试 10
3 结果与讨论 11
3.1 样品的物相分析 11
3.1.1 样品的XRD检测分析 11
3.1.2 样品的SEM形貌检测 13
3.2 样品的荧光分析 15
3.3 样品的光催化性能测试与分析 16
4 结论 19
参考文献 20
致谢 22
TiO2/Au纳米材料的制备及光催化性能
摘 要
TiO2是颇受重视的一种光催化剂，具有良好的生物和化学性质、活性高、价廉易得、对人体无害等优点。由于TiO2的带隙较宽，只能吸收紫外光，这在一定程度上限制了TiO2的实际应用。本文主要研究了介质pH值对水热法制备的TiO2的影响及Au的含量对TiO2/Au样品在紫外光下对甲基橙光催化降解的影响。以TiCl3为钛源，采用水热制备法，在200 °C的温度下恒温反应20 h，制备得到实验样品。通过XRD测定所制样品的成分及晶型结构；通过SEM对样品进行表征，观察样品的结构、晶粒度等；通过光催化降解甲基橙溶液，检验样品的光催化活性。结果表明：溶液的pH值是影响水热法制备TiO2纳米材料的主要因素之一。碱性溶液条件有利于板钛矿相TiO2的生成，酸性溶液条件有利于金红石相TiO2的形成，中性溶液条件有利于锐钛矿相TiO2的形成；Ti/Au摩尔比为30000:1的样品的光催化性能较好。
关键字：二氧化钛; 表面修饰; 金; 甲基橙; 水热法; 光催化
TiO2/Au Nanomaterials and Photocatalytic Properties
Abstract
TiO2 is a highly regarded photocatalyst, which has good biological and chemical properties, high activity. It is cheap as well as harmless to human body and so on. However, a wide forbidden band of TiO2 can only absorb ultraviolet light, which to some extent limit the practical application of TiO2. Changing the electronic structure of TiO2 by doping is an important technical approach to prepare TiO2 with visible response. The main purpose of this graduation thesis is to study the effects of Au loading on TiO2/Au samples to photocatalytic degrade the methyl-orange under UV light, and the effects of medium pH to prepare TiO2 by hydrothermal synthesis. I use TiCl3 as titanium source, use hydrothermal synthesis and let the reaction happen at 200 °C for 20 h in constant temperature and prepared photocatalyst material of different Au loadings TiO2/Au. I use XRD to determinate the composition and crystal structure of the prepared samples, also the samples were characterized by SEM, by doing these, the structure and the grain size of the sample was observed. and by the experiment of photocatalytic degradation of methyl orange, the photocatalytic activity of the sample was characterize. The results showed that: the pH value is one of the main factors using the hydrothermal to make TiO2 photocatalytic material. Alkaline solution is conducive to the formation of brookite. Acidic solution is conducive to the formation of rutile phase. Neutral solution is conducive to the formation of anatase phase. The photocatalytic properties of the sample is the best when the Ti/Au molar ratio is 30000:1.
Key words: Titanium dioxide; methyl orange; hydrothermal synthesis; gold; surface modification; photocatalytic
