Nitrogen-doped Porous 3D Graphene Aerogel Composites Prepara
发布时间：2021-04-09 00:32
自2004年被发现以来,石墨烯（GR）一直受到广泛关注,并且由于其优异的电气和机械性能而被用于电子设备,催化过程和其他领域。GR是sp2杂化碳原子的二维纳米片。但是GR本身也具有一些缺点,例如由于强大的π-π键和范德华力而导致的石墨烯层之间不可逆的堆积等。为了克服石墨烯的这些缺点,已经报到了许多对石墨烯的功能化修饰,例如三维（3D）多孔石墨烯气凝胶。石墨烯气凝胶（GA）是一种超低密度多孔石墨烯,它是通过用空气替换湿凝胶孔中的液体而形成的。GA具有许多优异的性能,例如低密度,高孔隙率,大比表面积,出色的导电性,带电载流子非常快,成本低,介电常数和折射率低等。因此,它可用于电化学领域中作为传感器或生物传感器的电极材料。为了使GA适合更多的应用领域,一些研究工作通过引入孔和杂原子掺杂对其结构进行了一些功能修饰。多孔GA（PGA）是一种GA薄片,在原子平面内有一些孔。这是一种改良的GA薄板,其中平面内没有碳原子的地方会产生一些孔。GA中孔的存在起到了增加比表面积的作用,并且减小了中间层之间的范德华相互作用,从而减少了石墨烯纳米层的堆叠,并为催化剂提供了更多的表面活性位,也...
【文章来源】：东北师范大学吉林省 211工程院校 教育部直属院校
【文章页数】：74 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
CHAPTER ONE:General introduction
1.1 Graphene introduction
1.2 Porous graphene aerogels
1.3 Applications of graphene aerogels
1.4 Electrochemical sensor based on porous graphene aerogels and composites
1.5 The aims of this work
CHAPTER TWO:3D nitrogen-doped porous graphene aerogel as high-performance electrocatalyst for determination of gallic acid
2.1.Introduction
2.2 Experimental
2.2.1 Instruments and reagents
2.2.2 Synthesis of NPGA
2.2.3 Fabrication of NPGA and RGO electrodes
2.2.4 Preparation of real samples
2.3.Results and discussion
2.3.1 Morphology and structural characterization
2.3.2 Electrochemical characterizations
2.3.3 Electrochemical behavior of GAL at different electrodes
2.3.4 Optimization of supporting electrolyte,p H and scan rate
2.3.5 Determination of GAL at NPGA electrode
2.3.6 Interferences,reproducibility,and stability
2.3.7 Real samples analysis
2.4 Conclusion
CHAPTER THREE:A highly sensitive nonenzymatic H2O2 sensor based on3D N-doped porous graphene aerogel decorated with Au Pd alloy nanoparticles
3.1 Introduction
3.2 Experimental
3.2.1 Chemical reagents
3.2.2 Electrochemical measurements
3.2.3 Synthesis of the NPGA
3.2.4 Synthesis of the Au Pd/NPGA,Au/NPGA and Pd/NPGA catalysts
3.2.5 Synthesize of Au Pd/NPGA,Au/NPGA and Pd/NPGA electrodes
3.3 Results and discussion
3.3.1 Characterization of NPGA and AuPd/NPGA
2O2 in Au Pd/NPGA"> 3.3.2 Electrochemical performance of H2O2 in Au Pd/NPGA
3.3.3 Real samples analysis
3.4 Conclusion
References
Papers published
Acknowledgements
本文编号：3126562
【文章来源】：东北师范大学吉林省 211工程院校 教育部直属院校
【文章页数】：74 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
CHAPTER ONE:General introduction
1.1 Graphene introduction
1.2 Porous graphene aerogels
1.3 Applications of graphene aerogels
1.4 Electrochemical sensor based on porous graphene aerogels and composites
1.5 The aims of this work
CHAPTER TWO:3D nitrogen-doped porous graphene aerogel as high-performance electrocatalyst for determination of gallic acid
2.1.Introduction
2.2 Experimental
2.2.1 Instruments and reagents
2.2.2 Synthesis of NPGA
2.2.3 Fabrication of NPGA and RGO electrodes
2.2.4 Preparation of real samples
2.3.Results and discussion
2.3.1 Morphology and structural characterization
2.3.2 Electrochemical characterizations
2.3.3 Electrochemical behavior of GAL at different electrodes
2.3.4 Optimization of supporting electrolyte,p H and scan rate
2.3.5 Determination of GAL at NPGA electrode
2.3.6 Interferences,reproducibility,and stability
2.3.7 Real samples analysis
2.4 Conclusion
CHAPTER THREE:A highly sensitive nonenzymatic H2O2 sensor based on3D N-doped porous graphene aerogel decorated with Au Pd alloy nanoparticles
3.1 Introduction
3.2 Experimental
3.2.1 Chemical reagents
3.2.2 Electrochemical measurements
3.2.3 Synthesis of the NPGA
3.2.4 Synthesis of the Au Pd/NPGA,Au/NPGA and Pd/NPGA catalysts
3.2.5 Synthesize of Au Pd/NPGA,Au/NPGA and Pd/NPGA electrodes
3.3 Results and discussion
3.3.1 Characterization of NPGA and AuPd/NPGA
2O2 in Au Pd/NPGA"> 3.3.2 Electrochemical performance of H2O2 in Au Pd/NPGA
3.3.3 Real samples analysis
3.4 Conclusion
References
Papers published
Acknowledgements
本文编号：3126562
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