發(fā)布時間：2018-07-04 11:47

  本文選題：電化學(xué)傳感器 + 金屬復(fù)合材料��； 參考：《吉林大學(xué)》2017年碩士論文

【摘要】：作為分析測試的重要手段電化學(xué)傳感器由于具有操作簡便、費用較低、在復(fù)雜環(huán)境中可實時在線檢測等多方面的優(yōu)點,因此在臨床醫(yī)學(xué)、食品和藥品工業(yè)、農(nóng)業(yè)、生命科學(xué)和環(huán)境保護等領(lǐng)域具有廣泛的應(yīng)用。其中電極修飾材料對電化學(xué)傳感器的性能有著決定性的作用,因此尋求一些性能良好的電極修飾材料是電化學(xué)傳感器的主要研究方向之一。目前,碳納米材料、導(dǎo)電聚合物、金屬或金屬氧化物納米材料和生物活性分子等材料已經(jīng)被普遍的用作電極修飾物,制備出了大量具有優(yōu)良性能且適用范圍廣泛的電化學(xué)傳感器。將兩種或多種具有不同性質(zhì)的材料結(jié)合在一起,所得到的復(fù)合材料在電化學(xué)傳感器性能的改進上具有非常顯著的優(yōu)勢。復(fù)合材料與單一組分相比,不僅能夠結(jié)合各個組分的優(yōu)勢,還能在協(xié)同作用之下顯示出更為優(yōu)越的性能。金屬材料由于具有導(dǎo)電性好與電催化活性高等優(yōu)點,因此可以將它和其他不同的基體材料相結(jié)合,從而制備出種類繁多,結(jié)構(gòu)多變,性能多樣的金屬復(fù)合材料。將金屬復(fù)合材料修飾到電極表面,能夠十分明顯的增大電化學(xué)傳感器的響應(yīng)信號,進而提高方法的靈敏度。石墨烯具有獨特的二維結(jié)構(gòu)、優(yōu)異的導(dǎo)電性、高比表面積等優(yōu)點,能夠高效地增強電化學(xué)傳感器的催化效果�；谝陨戏治�,本文以金屬復(fù)合材料和石墨烯為基礎(chǔ),構(gòu)筑電化學(xué)傳感器分別對多巴胺和對硝基苯酚進行檢測,具體工作如下:第一章,對金屬復(fù)合材料、石墨烯和電化學(xué)傳感器作了簡要概述。第二章,以銅與2-氨基-5-巰基-1,3,4-噻二唑絡(luò)合物(Cu(Ⅱ)-AMT)為原料,并結(jié)合石墨烯(rGO)通過π-π堆疊相互作用構(gòu)建了rGO-poly(Cu-AMT)納米復(fù)合材料修飾的電化學(xué)傳感器,該傳感器可以用于多巴胺的超靈敏選擇性檢測,并探討了多巴胺在該電極材料上的電子轉(zhuǎn)移動力學(xué)。第三章,利用簡單且低成本的電化學(xué)方法制備了rGO-poly(Cu-GSH)納米復(fù)合物,將該納米復(fù)合物修飾的電極應(yīng)用于線性掃描伏安法檢測4-硝基苯酚,該電化學(xué)傳感器表現(xiàn)出較好的穩(wěn)定性、較高的靈敏度、較寬的線性范圍0.05-300μM和較低的檢測限13.56 nM。
[Abstract]:As an important means of analysis and testing, electrochemical sensors have the advantages of simple operation, low cost, real-time on-line detection in complex environment, and so on. Therefore, electrochemical sensors are widely used in clinical medicine, food and medicine industry, agriculture, etc. Life science and environmental protection are widely used. Electrode modified materials play a decisive role in the performance of electrochemical sensors, so it is one of the main research directions of electrochemical sensors to seek some good electrode modified materials. At present, carbon nanomaterials, conductive polymers, metal or metal oxide nanomaterials and bioactive molecules have been widely used as electrode modifiers. A large number of electrochemical sensors with excellent performance and wide application range have been prepared. By combining two or more materials with different properties, the obtained composite has a very significant advantage in improving the performance of electrochemical sensors. Compared with a single component, the composite can not only combine the advantages of each component, but also show better performance under synergistic action. Metal materials have the advantages of good electrical conductivity and high electrocatalytic activity, so they can be combined with other different matrix materials to produce various kinds of metal composites with varied structure and various properties. When the metal composite is modified to the surface of the electrode, the response signal of the electrochemical sensor can be increased obviously, and the sensitivity of the method can be improved. Graphene has a unique two-dimensional structure, excellent electrical conductivity, high specific surface area and other advantages, which can effectively enhance the catalytic effect of electrochemical sensors. Based on the above analysis, an electrochemical sensor was constructed to detect dopamine and p-nitrophenol based on metal composites and graphene. Graphene and electrochemical sensors are briefly reviewed. In chapter 2, the electrochemical sensor modified by rGO-poly (Cu-AMT) nanocomposites was prepared by 蟺-蟺 stacking interaction of copper with 2-amino-5-mercapto-3-thiadiazole complex (Cu (鈪，

本文編號：2095982