不同形貌特征的金(银)纳米粒子的制备条件.doc
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不同形貌特征的金(银)纳米粒子的制备条件,全文35页约15000字论述翔实摘要金-银双金属纳米粒子因其在电学、化学和光学等方面具有特殊性能和广泛应用前景引起了人们的广泛重视。所以对金-银复合结构纳米粒子的制备和研究很有意义。本文将对具有加以讨论。实验过程中以n,n-二甲基甲酰胺作为...
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不同形貌特征的金(银)纳米粒子的制备条件
全文35页 约15000字 论述翔实
摘 要
金-银双金属纳米粒子因其在电学、化学和光学等方面具有特殊性能和广泛应用前景引起了人们的广泛重视。所以对金-银复合结构纳米粒子的制备和研究很有意义。本文将对具有不同形貌特征的金(银)纳米粒子的制备条件加以讨论。实验过程中以N,N-二甲基甲酰胺作为反应的还原剂和反应介质,商业化的KH-550作为 金(银)纳米微粒的表面修饰剂,氯金酸、硝酸银作为反应原料,利用化学合成的方法制备金-银复合结构纳米微粒。由于反应温度不同、反应物浓度不同,造成反应速度不同,从而导致不同反应条件下制备金(银)纳米微粒的所需的时间范围不同。通过多次反复实验找出制备金(银)纳米微粒的适宜条件,选择不同摩尔比合成了金(银)复合结构纳米粒子,并观察不同摩尔比对反应结果的影响,可以明显观察到由于摩尔比不同,制备的样品颜色有明显差异。采用紫外-可见吸收光谱仪对所制备的样品进行了分析测试,得到的吸收曲线。总结出温度、摩尔比和浓度等因素对生成金(银)纳米微粒形貌的影响规律,并根据谱图曲线初步探讨银纳米微粒的生长机制。上述的实验结果为合成金(银)纳米材料的反应提供了一定的理论和实验支持,同时也为金-银复合结构纳米粒子的进一步应用奠定了较好基础。
关键词:金纳米粒子;银纳米粒子;紫外-可见吸收光谱;KH-550
Abstract
Gold-silver bimetallic nanoparticles arouse people,s extensive attention because of its electrics,chemistry and optics behavior and extensively application prospect.So it is of great significance to synthesis and research gold-silver composite structural nanoparticles.In this text,we discuss the synthesis conditions of diffeent shaps of gold-silver nanoparticles that synthesized.In this paper, we synthesized gold-silver composite structural nanopaticles by the use of N,N-dimethy formamide as reductant and reaction medium, commercialized KH-550 as surface modificatory agent,HAuCl4,AgNO3 as reactant material, theough chemical synthesis method. Owing to different temperatures, different concentrations of reactent, as well different reaction velocity, so time span of different shaped gold-silver nanoparticles synthesized in different conditions is different. We can reduct spheric gold(silver) nanoparticles by N,N-dimethy formamide. To find out the properest conditions of the reaction through times of repeating experiments. We choose different mole ratio to obtain gold-silver composite structrural nanoparticles, and observe the affection for reaction result of different mole ratio, it can be observed that obvious difference exist in the color of samples prepared owing to different mole ratio .We adopt UV-vis absorption spectra equipment to test the prepared samples, to analyse the obsorption curve, to summerize the affection rule of temperature, mole ratio and concentrations to morphology of produced gold(silver) nanoparticles, and discuss growth mechanism of silver nanoparticles according to the curve. Before-mentioned experiment result provide some theoretical and experimental supports for the synthesis reaction of silver nano-metrial as well lay the foundation of further application for gold(silver) composite structural nanoparticles.
Key words: gold nanoparticles; silver nanoparticles; UV-vis absorption spectra; 3-(aminopropyl)triethyl-oxysilane
目 录
摘 要 …………………………………………………………………………………….....I
Abstract……………………………………………………………………………………….II
第1章 引言…………………………………………………………………………………...1
1.1 概述 1
1.2 纳米粒子的定义……………………………………………………………………..2
1.3 金属纳米材料………………………………………………………………………..2
1.4 国内外研究动态……………………………………………………………………..3
1.5 金属纳米材料的现状及发展展望…………………………………………………..4
1.5.1 金属纳米材料的现状分析…………………………………………………….4
1.5.2 金属纳米材料的展望及挑战………………………………………………….5
1.6 金属纳米薄膜的制备………………………………………………………………..6
1.6.1 物理气象沉积法……………………………………………………………….6
1.6.2 化学气象沉积法……………………………………………………………….9
1.7 银纳米粒子的制备…………………………………………………………………..9
1.8 Au-Ag复合结构纳米微粒的制备方法…………………………………………….10
第2章 实验部分…………………………………………………………………………….11
2.1 试剂和药品…………………………………………………………………………11
2.2 实验仪器……………………………………………………………………………11
2.3 样品的合成与制备…………………………………………………………………11
2.3.1 银纳米微粒的合成………………………………………………………….12
2.3.2 金纳米微粒的合成………………………………………………………….12
2.3.3 金-银合金的制备…………………………………………………………...12
2.4 测试仪器……………………………………………………………………………13
第3章 结果与讨论………………………………………………………………………….14
3.1 实验原理分析………………………………………………………………………14
3.2 样品的紫外-可见吸收光谱分析…………………………………………………..15
结论…………………………………………………………………………………………...29
参 考 文 献………………………………………………………………………………….30
致 谢……………………………………………………………………………………...31
部分参考文献
[7] 唐一科,许静,韦立凡.纳米材料制备方法的研究现状与发展趋势[J].重庆大学学报.2005,28(1) :5~10.
[8] 张立德.纳米材料[M].北京:化学土业出版社.2000.
[9] 方芳.朱敏.纳米材料和纳米技术发展的哲学思考. 世界科技研究与发展[J].
2001,23(4): 51~54.
[10] 薛群基.徐康.纳米化学[J].化学进展.2000, 12(4): 431~444.
[11] 张立德.牟季美著.纳米材料和纳米结构[M].北京:科学出版社.2001.
全文35页 约15000字 论述翔实
摘 要
金-银双金属纳米粒子因其在电学、化学和光学等方面具有特殊性能和广泛应用前景引起了人们的广泛重视。所以对金-银复合结构纳米粒子的制备和研究很有意义。本文将对具有不同形貌特征的金(银)纳米粒子的制备条件加以讨论。实验过程中以N,N-二甲基甲酰胺作为反应的还原剂和反应介质,商业化的KH-550作为 金(银)纳米微粒的表面修饰剂,氯金酸、硝酸银作为反应原料,利用化学合成的方法制备金-银复合结构纳米微粒。由于反应温度不同、反应物浓度不同,造成反应速度不同,从而导致不同反应条件下制备金(银)纳米微粒的所需的时间范围不同。通过多次反复实验找出制备金(银)纳米微粒的适宜条件,选择不同摩尔比合成了金(银)复合结构纳米粒子,并观察不同摩尔比对反应结果的影响,可以明显观察到由于摩尔比不同,制备的样品颜色有明显差异。采用紫外-可见吸收光谱仪对所制备的样品进行了分析测试,得到的吸收曲线。总结出温度、摩尔比和浓度等因素对生成金(银)纳米微粒形貌的影响规律,并根据谱图曲线初步探讨银纳米微粒的生长机制。上述的实验结果为合成金(银)纳米材料的反应提供了一定的理论和实验支持,同时也为金-银复合结构纳米粒子的进一步应用奠定了较好基础。
关键词:金纳米粒子;银纳米粒子;紫外-可见吸收光谱;KH-550
Abstract
Gold-silver bimetallic nanoparticles arouse people,s extensive attention because of its electrics,chemistry and optics behavior and extensively application prospect.So it is of great significance to synthesis and research gold-silver composite structural nanoparticles.In this text,we discuss the synthesis conditions of diffeent shaps of gold-silver nanoparticles that synthesized.In this paper, we synthesized gold-silver composite structural nanopaticles by the use of N,N-dimethy formamide as reductant and reaction medium, commercialized KH-550 as surface modificatory agent,HAuCl4,AgNO3 as reactant material, theough chemical synthesis method. Owing to different temperatures, different concentrations of reactent, as well different reaction velocity, so time span of different shaped gold-silver nanoparticles synthesized in different conditions is different. We can reduct spheric gold(silver) nanoparticles by N,N-dimethy formamide. To find out the properest conditions of the reaction through times of repeating experiments. We choose different mole ratio to obtain gold-silver composite structrural nanoparticles, and observe the affection for reaction result of different mole ratio, it can be observed that obvious difference exist in the color of samples prepared owing to different mole ratio .We adopt UV-vis absorption spectra equipment to test the prepared samples, to analyse the obsorption curve, to summerize the affection rule of temperature, mole ratio and concentrations to morphology of produced gold(silver) nanoparticles, and discuss growth mechanism of silver nanoparticles according to the curve. Before-mentioned experiment result provide some theoretical and experimental supports for the synthesis reaction of silver nano-metrial as well lay the foundation of further application for gold(silver) composite structural nanoparticles.
Key words: gold nanoparticles; silver nanoparticles; UV-vis absorption spectra; 3-(aminopropyl)triethyl-oxysilane
目 录
摘 要 …………………………………………………………………………………….....I
Abstract……………………………………………………………………………………….II
第1章 引言…………………………………………………………………………………...1
1.1 概述 1
1.2 纳米粒子的定义……………………………………………………………………..2
1.3 金属纳米材料………………………………………………………………………..2
1.4 国内外研究动态……………………………………………………………………..3
1.5 金属纳米材料的现状及发展展望…………………………………………………..4
1.5.1 金属纳米材料的现状分析…………………………………………………….4
1.5.2 金属纳米材料的展望及挑战………………………………………………….5
1.6 金属纳米薄膜的制备………………………………………………………………..6
1.6.1 物理气象沉积法……………………………………………………………….6
1.6.2 化学气象沉积法……………………………………………………………….9
1.7 银纳米粒子的制备…………………………………………………………………..9
1.8 Au-Ag复合结构纳米微粒的制备方法…………………………………………….10
第2章 实验部分…………………………………………………………………………….11
2.1 试剂和药品…………………………………………………………………………11
2.2 实验仪器……………………………………………………………………………11
2.3 样品的合成与制备…………………………………………………………………11
2.3.1 银纳米微粒的合成………………………………………………………….12
2.3.2 金纳米微粒的合成………………………………………………………….12
2.3.3 金-银合金的制备…………………………………………………………...12
2.4 测试仪器……………………………………………………………………………13
第3章 结果与讨论………………………………………………………………………….14
3.1 实验原理分析………………………………………………………………………14
3.2 样品的紫外-可见吸收光谱分析…………………………………………………..15
结论…………………………………………………………………………………………...29
参 考 文 献………………………………………………………………………………….30
致 谢……………………………………………………………………………………...31
部分参考文献
[7] 唐一科,许静,韦立凡.纳米材料制备方法的研究现状与发展趋势[J].重庆大学学报.2005,28(1) :5~10.
[8] 张立德.纳米材料[M].北京:化学土业出版社.2000.
[9] 方芳.朱敏.纳米材料和纳米技术发展的哲学思考. 世界科技研究与发展[J].
2001,23(4): 51~54.
[10] 薛群基.徐康.纳米化学[J].化学进展.2000, 12(4): 431~444.
[11] 张立德.牟季美著.纳米材料和纳米结构[M].北京:科学出版社.2001.