Nitrogen-doped Porous 3D Graphene Aerogel Composites Prepara
發(fā)布時間：2021-04-09 00:32
自2004年被發(fā)現(xiàn)以來,石墨烯（GR）一直受到廣泛關(guān)注,并且由于其優(yōu)異的電氣和機(jī)械性能而被用于電子設(shè)備,催化過程和其他領(lǐng)域。GR是sp2雜化碳原子的二維納米片。但是GR本身也具有一些缺點(diǎn),例如由于強(qiáng)大的π-π鍵和范德華力而導(dǎo)致的石墨烯層之間不可逆的堆積等。為了克服石墨烯的這些缺點(diǎn),已經(jīng)報到了許多對石墨烯的功能化修飾,例如三維（3D）多孔石墨烯氣凝膠。石墨烯氣凝膠（GA）是一種超低密度多孔石墨烯,它是通過用空氣替換濕凝膠孔中的液體而形成的。GA具有許多優(yōu)異的性能,例如低密度,高孔隙率,大比表面積,出色的導(dǎo)電性,帶電載流子非�？�,成本低,介電常數(shù)和折射率低等。因此,它可用于電化學(xué)領(lǐng)域中作為傳感器或生物傳感器的電極材料。為了使GA適合更多的應(yīng)用領(lǐng)域,一些研究工作通過引入孔和雜原子摻雜對其結(jié)構(gòu)進(jìn)行了一些功能修飾。多孔GA（PGA）是一種GA薄片,在原子平面內(nèi)有一些孔。這是一種改良的GA薄板,其中平面內(nèi)沒有碳原子的地方會產(chǎn)生一些孔。GA中孔的存在起到了增加比表面積的作用,并且減小了中間層之間的范德華相互作用,從而減少了石墨烯納米層的堆疊,并為催化劑提供了更多的表面活性位,也...
【文章來源】：東北師范大學(xué)吉林省 211工程院校 教育部直屬院校
【文章頁數(shù)】：74 頁
【學(xué)位級別】：碩士
【文章目錄】：
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
本文編號：3126562
【文章來源】：東北師范大學(xué)吉林省 211工程院校 教育部直屬院校
【文章頁數(shù)】：74 頁
【學(xué)位級別】：碩士
【文章目錄】：
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
本文編號：3126562
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