本文選題：氮摻雜石墨烯 + 電化學(xué)發(fā)光�。� 參考：《安徽大學(xué)》2015年碩士論文

【摘要】：電化學(xué)發(fā)光分析具有靈敏度高、分析速度快、可控性好等一系列優(yōu)點(diǎn),因此在分析檢測(cè)領(lǐng)域具有廣泛的應(yīng)用。制備氮摻雜石墨烯是材料領(lǐng)域的一個(gè)研究熱點(diǎn),因?yàn)榈獡诫s石墨烯具有優(yōu)異的光電性質(zhì),在納米電子器件、生物傳感器、能源科學(xué)等領(lǐng)域有廣泛的應(yīng)用前景。本論文通過(guò)表面吸附、共價(jià)鍵和、層層組裝等方式,將氮摻雜石墨烯與納米粒子、氮摻雜石墨烯與雙光子吸收配合物結(jié)合,構(gòu)建了電化學(xué)發(fā)光傳感器。對(duì)氮摻雜石墨烯及其復(fù)合物組成和形貌進(jìn)行了表征,探討了復(fù)合物的電化學(xué)性質(zhì)和電化學(xué)發(fā)光機(jī)理,研究了電化學(xué)發(fā)光傳感器的性質(zhì),并將其用于分析檢測(cè)。主要研究?jī)?nèi)容如下：1.氮摻雜石墨烯/碲化鎘量子點(diǎn)復(fù)合物的制備及其電化學(xué)發(fā)光行為通過(guò)將氮摻雜石墨烯與碲化鎘量子點(diǎn)結(jié)合,建立了一種增強(qiáng)復(fù)合材料電化學(xué)發(fā)光的方法。將氮摻雜石墨烯(NG)與碲化鎘量子點(diǎn)(NG/CdTe QDs)修飾在玻碳電極表面,制備了NG/CdTe QDs復(fù)合物電化學(xué)發(fā)光生物傳感器。利用掃描電鏡、透射電鏡、X射線衍射儀、紫外-可見(jiàn)光譜儀、紅外光譜儀、熒光光譜儀、阻抗分析儀對(duì)所得產(chǎn)物進(jìn)行了表征。探討了該生物傳感器的電化學(xué)發(fā)光機(jī)理和影響因素。研究結(jié)果表明,所制備的生物傳感器不僅具有較高的電化學(xué)發(fā)光強(qiáng)度,而且穩(wěn)定性好,生物相容性好。樣品分析結(jié)果表明,該傳感器可用于測(cè)定抗壞血酸,檢測(cè)范圍為0.04～200 gM,檢測(cè)限為0.0151μM。2.硫端基CdS2L配合物的電化學(xué)發(fā)光行為利用溶劑熱法合成了一種結(jié)構(gòu)新穎的硫端基CdS2L配合物。一系列實(shí)驗(yàn)結(jié)果表明,合成的CdS2L在過(guò)硫酸鉀溶液中具有較好的電化學(xué)發(fā)光性質(zhì)。通過(guò)比較它的雙光子吸收性質(zhì)和電化學(xué)發(fā)光性質(zhì),討論了影響CdS2L發(fā)光的因素及其電化學(xué)發(fā)光機(jī)制,在此基礎(chǔ)上,利用CdS2L構(gòu)建了一種性質(zhì)穩(wěn)定的固態(tài)電化學(xué)發(fā)光生物傳感器,該生物傳感器對(duì)谷胱甘肽具有良好的響應(yīng),響應(yīng)的線性范圍為0.002～4μM。該研究結(jié)果拓展了雙光子吸收材料的應(yīng)用范圍。3.氮摻雜石墨烯/CdS2L配合物的電化學(xué)發(fā)光行為通過(guò)層層組裝技術(shù),將氮摻雜石墨烯和CdS2L配合物修飾在玻碳電極表面,制備N(xiāo)G/CdS2L復(fù)合物電化學(xué)發(fā)光生物傳感器。測(cè)試結(jié)果顯示,該傳感器具有較好的電化學(xué)發(fā)光性質(zhì)。通過(guò)改變實(shí)驗(yàn)條件,研究了該生物傳感器的影響因素。樣品測(cè)試結(jié)果表明,該傳感器對(duì)尿酸有靈敏、快速的響應(yīng),在最佳條件下尿酸濃度在0.002～2μM范圍內(nèi),電化學(xué)發(fā)光強(qiáng)度的對(duì)數(shù)與濃度的對(duì)數(shù)具有線性關(guān)系。
[Abstract]:Electrochemiluminescence analysis has a series of advantages, such as high sensitivity, fast analysis speed, good controllability and so on, so it has a wide range of applications in the field of analysis and detection. The preparation of nitrogen-doped graphene is a research hotspot in the field of materials, because of its excellent photoelectric properties, nitrogen doped graphene has a broad application prospect in nanoelectronic devices, biosensors, energy science and other fields. In this paper, a chemiluminescence sensor was constructed by combining nitrogen-doped graphene with nanoparticles, nitrogen-doped graphene and two-photon absorption complex by surface adsorption, covalent bonding and layer-by-layer assembly. The composition and morphology of nitrogen-doped graphene and its complexes were characterized. The electrochemical properties and electroluminescence mechanism of the complexes were discussed. The properties of electroluminescent sensors were studied and used for analysis and detection. The main research contents are as follows: 1. Preparation and electrochemiluminescence behavior of nitrogen-doped graphene / cadmium telluride quantum dot complexes a method for enhancing electrochemiluminescence of composite materials was established by combining nitrogen-doped graphene with cadmium telluride quantum dots. The NG/CdTe QDs complex electroluminescent biosensor was prepared by modifying nitrogen-doped graphene with cadmium telluride quantum dot NG- / CdTe QDson the surface of glassy carbon electrode. The products were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM) X-ray diffractometer, UV-Vis spectrometer, infrared spectrometer, fluorescence spectrometer and impedance analyzer. The electrochemiluminescence mechanism and influencing factors of the biosensor were discussed. The results show that the biosensor not only has high electrochemical luminescence intensity, but also has good stability and biocompatibility. The results of sample analysis show that the sensor can be used for the determination of ascorbic acid with a detection range of 0.04g / m and a detection limit of 0.0151 渭 M.2. Electrochemiluminescence behavior of sulfur terminal CdS2L complexes a novel sulfur terminal CdS2L complex was synthesized by solvothermal method. A series of experimental results show that the synthesized CdS2L has good electrochemiluminescence properties in potassium persulfate solution. By comparing its two-photon absorption and electrochemiluminescence properties, the factors affecting CdS2L luminescence and its electrochemiluminescence mechanism are discussed. On the basis of this, a solid-state electroluminescent biosensor with stable properties is constructed by using CdS2L. The biosensor has a good response to glutathione with a linear range of 0.002 渭 m. The results extend the application scope of two-photon absorption material. 3. Electrochemiluminescence behavior of nitrogen-doped graphene / CdS2L complexes by layer-by-layer assembly technique, nitrogen-doped graphene and CdS2L complexes were modified on the surface of glassy carbon electrode to prepare NG/CdS2L complex electroluminescent biosensor. The results show that the sensor has good electrochemical luminescence properties. The influencing factors of the biosensor were studied by changing the experimental conditions. The sample test results show that the sensor is sensitive and rapid to uric acid, and the logarithm of ECL intensity has a linear relationship with the logarithm of concentration in the range of 0.002 渭 M under the optimum conditions.
【學(xué)位授予單位】：安徽大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：O613.71;TB33

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