tio2/au納米材料的制備及光催化性能.zip
tio2/au納米材料的制備及光催化性能,包括開題報告，任務(wù)書，ppt，翻譯原文和譯文摘要iabstractii1 引言11.1 tio2光催化技術(shù)發(fā)展背景11.2 tio2光催化的基本原理11.2.1 tio2的晶體結(jié)構(gòu)及性質(zhì)11.2.2 tio2能帶結(jié)構(gòu)21.2.3 tio2光催化反應(yīng)原理31.3 tio2光催化反應(yīng)研究進展41.3.1 金屬離子摻雜51....
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原文檔由會員 牛奶咖啡 發(fā)布
包括開題報告，任務(wù)書，ppt，翻譯原文和譯文
摘 要 I
Abstract II
1 引言 1
1.1 TiO2光催化技術(shù)發(fā)展背景 1
1.2 TiO2光催化的基本原理 1
1.2.1 TiO2的晶體結(jié)構(gòu)及性質(zhì) 1
1.2.2 TiO2能帶結(jié)構(gòu) 2
1.2.3 TiO2光催化反應(yīng)原理 3
1.3 TiO2光催化反應(yīng)研究進展 4
1.3.1 金屬離子摻雜 5
1.3.2 非金屬元素摻雜 5
1.3.3 貴金屬修飾 5
1.3.4 表面光敏化 6
1.3.5 半導(dǎo)體復(fù)合 6
1.4 本課題的研究意義及內(nèi)容 7
2 實驗方法 8
2.1 實驗步驟 8
2.1.1 實驗試劑及設(shè)備 8
2.1.2 在不同pH值條件下水熱法制備TiO2樣品 8
2.1.3 水熱法制備摻金量不同的樣品 9
2.2 樣品檢測 10
2.2.1 樣品的表征 10
2.2.2 樣品的活性測試 10
3 結(jié)果與討論 11
3.1 樣品的物相分析 11
3.1.1 樣品的XRD檢測分析 11
3.1.2 樣品的SEM形貌檢測 13
3.2 樣品的熒光分析 15
3.3 樣品的光催化性能測試與分析 16
4 結(jié)論 19
參考文獻 20
致謝 22
TiO2/Au納米材料的制備及光催化性能
摘 要
TiO2是頗受重視的一種光催化劑，具有良好的生物和化學(xué)性質(zhì)、活性高、價廉易得、對人體無害等優(yōu)點。由于TiO2的帶隙較寬，只能吸收紫外光，這在一定程度上限制了TiO2的實際應(yīng)用。本文主要研究了介質(zhì)pH值對水熱法制備的TiO2的影響及Au的含量對TiO2/Au樣品在紫外光下對甲基橙光催化降解的影響。以TiCl3為鈦源，采用水熱制備法，在200 °C的溫度下恒溫反應(yīng)20 h，制備得到實驗樣品。通過XRD測定所制樣品的成分及晶型結(jié)構(gòu)；通過SEM對樣品進行表征，觀察樣品的結(jié)構(gòu)、晶粒度等；通過光催化降解甲基橙溶液，檢驗樣品的光催化活性。結(jié)果表明：溶液的pH值是影響水熱法制備TiO2納米材料的主要因素之一。堿性溶液條件有利于板鈦礦相TiO2的生成，酸性溶液條件有利于金紅石相TiO2的形成，中性溶液條件有利于銳鈦礦相TiO2的形成；Ti/Au摩爾比為30000:1的樣品的光催化性能較好。
關(guān)鍵字：二氧化鈦; 表面修飾; 金; 甲基橙; 水熱法; 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光催化技術(shù)發(fā)展背景 1
1.2 TiO2光催化的基本原理 1
1.2.1 TiO2的晶體結(jié)構(gòu)及性質(zhì) 1
1.2.2 TiO2能帶結(jié)構(gòu) 2
1.2.3 TiO2光催化反應(yīng)原理 3
1.3 TiO2光催化反應(yīng)研究進展 4
1.3.1 金屬離子摻雜 5
1.3.2 非金屬元素摻雜 5
1.3.3 貴金屬修飾 5
1.3.4 表面光敏化 6
1.3.5 半導(dǎo)體復(fù)合 6
1.4 本課題的研究意義及內(nèi)容 7
2 實驗方法 8
2.1 實驗步驟 8
2.1.1 實驗試劑及設(shè)備 8
2.1.2 在不同pH值條件下水熱法制備TiO2樣品 8
2.1.3 水熱法制備摻金量不同的樣品 9
2.2 樣品檢測 10
2.2.1 樣品的表征 10
2.2.2 樣品的活性測試 10
3 結(jié)果與討論 11
3.1 樣品的物相分析 11
3.1.1 樣品的XRD檢測分析 11
3.1.2 樣品的SEM形貌檢測 13
3.2 樣品的熒光分析 15
3.3 樣品的光催化性能測試與分析 16
4 結(jié)論 19
參考文獻 20
致謝 22
TiO2/Au納米材料的制備及光催化性能
摘 要
TiO2是頗受重視的一種光催化劑，具有良好的生物和化學(xué)性質(zhì)、活性高、價廉易得、對人體無害等優(yōu)點。由于TiO2的帶隙較寬，只能吸收紫外光，這在一定程度上限制了TiO2的實際應(yīng)用。本文主要研究了介質(zhì)pH值對水熱法制備的TiO2的影響及Au的含量對TiO2/Au樣品在紫外光下對甲基橙光催化降解的影響。以TiCl3為鈦源，采用水熱制備法，在200 °C的溫度下恒溫反應(yīng)20 h，制備得到實驗樣品。通過XRD測定所制樣品的成分及晶型結(jié)構(gòu)；通過SEM對樣品進行表征，觀察樣品的結(jié)構(gòu)、晶粒度等；通過光催化降解甲基橙溶液，檢驗樣品的光催化活性。結(jié)果表明：溶液的pH值是影響水熱法制備TiO2納米材料的主要因素之一。堿性溶液條件有利于板鈦礦相TiO2的生成，酸性溶液條件有利于金紅石相TiO2的形成，中性溶液條件有利于銳鈦礦相TiO2的形成；Ti/Au摩爾比為30000:1的樣品的光催化性能較好。
關(guān)鍵字：二氧化鈦; 表面修飾; 金; 甲基橙; 水熱法; 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
