摘要石墨烯作为一种新型材料被科学家所发现，发展前景十分广阔，尤其是在电学，热学，光学等领域有着重大的研究意义。而如何对石墨烯复合材料的形态进行有效的控制并改善其综合性能，是目前研究的重点。24727
本文以鳞片石墨为原料，采用改进Hummers法制备氧化石墨薄膜。将硝酸银溶液以不同方式掺入氧化石墨烯溶液中，并通过热处理还原及以氢碘酸为还原剂还原氧化石墨烯薄膜的方式，还原氧化石墨中的硝酸银的银离子，制备银/石墨烯复合材料。采用扫描电子显微镜、X射线衍射仪、拉曼光谱、红外谱图、原子力显微镜对制得的银/石墨烯复合材料进行表征，并对复合材料的导热性能进行分析。得到如下结论：
（1）石墨烯复合薄膜的导热性与其层间距、有序度、片层大小有很大关系。
（2）热处理还原的温度对薄膜的层间距增大起到了一定作用，银的掺杂可以在石墨烯薄膜的层与层之间起到一个联接的作用，使导热性得到一定的改善。
毕业论文关键词：氧化石墨烯；银；复合薄膜；热还原；热导率
Abstract
 Graphene ,  new kind of material be founded by scientists ,has  vast vield of development, especially in electrical, thermal, optical fields. What is the most important research part is that how to control the form of graphene composite material efficiently at present.
In this paper, with natural graphite  filler, through the use of  Hummers oxidation of improved preparation in preparing graphite oxide films .Mixed the silver nitrate liquor
into graphene oxide in different ways,and through the heat treatment or with hydroiodic acid  reducing agent reduction way of graphene oxide film,to reduct the silver ions in silver nitrate from graphite oxide,making silver/ graphite composite materials. Using the characterization methods of SEM, XRD ,Raman, FT-IR and AFM on the morphology of the silver/ graphite film samples and the microstructures were characterized,and analyze the performance of thermal conductivity of composite materials.The main conclusions  follows:
(1). The thermal conductivity of the graphene oxide composite films is related to layer spacing, degree of order and sheet size.
(2).The temperature of the heat treatment has played  role in increasing slice gap between the flims.with the mixure of silver ions,which could help to connect slices of graphene oxide films, and improve its thermal conductivity.
Keywords: graphite oxide; silver; composite film;high-temperature thermal reduction; thermal conductivity.
目录
第一章 绪论    1
1.1石墨烯的简介    1
1.1.1石墨烯的结构和性能    3
1.2  石墨烯材料的主要性质    3
1.3  石墨烯材料的应用    3
1.3.1石墨烯复合材料    4
1.3.2传感器    4
1.3.3超级电容器    5
1.3.4太阳能电池    6
1.3.5其它方面的应用    6
1.4 石墨烯的合成方法    7
1.4.1机械剥离法    7
1.4.2外延生长法    8
1.4.3氧化石墨还原法    8
1.4.4电化学还原法    9
1.4.5化学气相沉积法    9
1.5 石墨烯复合材料的导热性    10
1.6 论文研究内容    10
第二章 氧化还原石墨烯的制备方法    11
2.1 表征与测试    14
2.1.1原子力显微镜表征(AFM)    14
2.1.2扫描电子显微镜表征（SEM）    14
2.1.3拉曼光谱表征 (Raman)    14
2.1.4红外光谱测试(FT-IR）    14 银掺杂石墨烯薄膜的制备及其导热性能的研究:http://www.751com.cn/cailiao/lunwen_18335.html