环境友好型石墨烯-银三维网络复合材料的制备及性能研究

发布时间：2018-03-06 17:24

本文选题：绿色　切入点：石墨烯　出处：《齐鲁工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：最近,超薄二维石墨烯因其独特的电化学,机械,光学和热力学性能得到广泛关注。本文以L-抗坏血酸水溶液的蒸气为还原剂,成功制备了化学还原氧化石墨烯(RGO)薄膜。现有的气相还原剂有肼蒸气和氢碘酸蒸气,本文首次利用环境友好型气相还原剂对氧化石墨烯薄膜进行还原,得到了RGO薄膜。得到的RGO薄膜具有很好的韧性和高的电导率(3500 S/m)。L-抗坏血酸水蒸气可以同时对氧化石墨烯和银离子进行还原,得到石墨烯-银纳米颗粒复合材料。扫描电子显微镜(SEM)显示复合材料具有三维网络结构。得到的石墨烯-银复合材料可以用来增强拉曼信号。本论文中以罗丹明B (RhB)作为探针分子,来检测石墨烯-银复合材料的表面增强拉曼散射(SERS)。在拉曼谱图中,在624 cm-1处,Ag5G1(Ag+与GO质量比为5：1)是Ag2G1强度的两倍,Ag10G1是Ag2G1强度的4倍。当罗丹明B的浓度为1μM时,复合材料对拉曼信号的增强效果仍然很明显。本文制备的石墨烯-银复合材料对大肠杆菌,金黄色葡萄球菌和白腐菌也表现出了不同的杀菌能力。随着银纳米颗粒含量的增加,Ag5G1比Ag2G1具有更好的杀菌能力。继续增加银纳米颗粒的含量,Ag10G1对革兰氏阴性菌的大肠杆菌,革兰氏阳性菌的金黄色葡萄球菌和真菌的白腐菌都表现出了优是的抗菌活性。本文通过绿色方式直接制备的石墨烯-银纳米颗粒复合材料为生物应用提供了新材料。
[Abstract]:Recently, ultrathin two-dimensional graphene has attracted wide attention for its unique electrochemical, mechanical, optical and thermodynamic properties. Chemical reductive graphene oxide (RGOO) thin films have been successfully prepared. The existing gas phase reductants include hydrazine vapor and hydrogen iodate vapor. In this paper, environment-friendly gas phase reductants are used to reduce graphene oxide films for the first time. RGO thin films have been obtained. The obtained RGO thin films have good toughness and high conductivity of 3500s / mn. L- ascorbic acid vapor can simultaneously reduce graphene oxide and silver ions. The graphene silver nanoparticles composite was obtained. Scanning electron microscopy (SEM) showed that the composite had a three dimensional network structure. The resulting graphene silver composite could be used to enhance Raman signal. In this paper, Rhodamine was used to enhance Raman signal. B Rh B) as a probe molecule, The surface enhanced Raman scattering (SERS) of graphene silver composite was detected. In Raman spectroscopy, the mass ratio of Ag 5G 1O Ag to go is 5: 1 at 624 cm-1. The Ag10G1 is twice as strong as Ag2G1. When the concentration of Rhodamine B is 1 渭 M, the Ag10G1 is 4 times of that of Ag2G1. The enhancement effect of the composite on Raman signal is still very obvious. The graphene silver composite prepared in this paper is effective to Escherichia coli. Staphylococcus aureus and white rot fungus also showed different bactericidal ability. With the increase of silver nanoparticles content, Ag5G1 had better bactericidal ability than Ag2G1. Gram-positive Staphylococcus aureus and fungal white rot fungi showed excellent antibacterial activity. In this paper, graphene-silver nanoparticles composites were prepared directly in green way, which provided new materials for biological application.
【学位授予单位】：齐鲁工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB33

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