聚三聚氰胺导电聚合物薄膜修饰电极用于高酸度水溶液测定

在含有三聚氰胺单体的溶液中,采用循环伏安法电聚合成功制备了导电聚合物聚三聚氰胺薄膜修饰玻碳电极,研究了该修饰电极在不同浓度的盐酸溶液中电化学响应。研究表明,循环伏安图中具备一对可逆性良好的氧化还原峰,且氧化峰的峰电位与盐酸浓度在0.1~10.0 mol/L范围内分两段呈线性关系:在0.1~1.2 mol/L和1.4~10.0 mol/L,线性回归方程分别为Epa(V)=0.5256CH++0.1977,R2=0.9936;Epa(V)=0.01908 CH++0.2421,R2=0.9935;并进一步考察了对模拟强酸稀土提取液的酸度检测,具有良好的选择性和稳定性。该导电聚合物薄膜修饰电极制备方法简单快捷,可广泛应用于高酸度水溶液酸度的直接测定。     

染料修饰电极的研究进展

染料修饰电极因其电化学响应大,稳定性好且制备简单,引起了人们广泛的研究兴趣,发展非常迅速。本文介绍了近年来染料修饰电极的制备及其应用情况,并对染料修饰电极的发展趋势作了展望。     

高分子修饰电极及其在有机电解合成中的应用

采用高分子修饰电极是现代电化学的一个新的研究领域。由于它能使电极表面官能团密集化和形成三元化的新反应场,且制作方便,因此,在有机合成中的应用得到重视。本文对不对称电解合成、选择性合成和间接电解氧化-还原合成等及应用作了较详细的论述。     

碳纳米管修饰电极的研究进展

化学修饰电极如今在电化学和电分析化学中应用极为广泛。综述了碳纳米管的结构和性能,介绍了碳纳米管修饰电极的制备及应用。     

聚合物修饰电极在生化分析中的应用

聚合物修饰电极是化学修饰电极中一个重要的分支,也是当前研究较多、应用较广的一种电化学传感器。聚合物修饰电极具有灵敏度高、准确性好、分析速度快、成本低和操作简单等特点,已广泛应用于电分析化学领域。本论文中,简述了聚合物修饰电极在生化分析中的应用。     

抗坏血酸在dsDNA修饰玻碳电极上的电催化氧化

制备了双链和单链DNA修饰的玻碳电极,并且比较了抗坏血酸在裸电极和DNA修饰电极上的电催化性能,同时研究了扫描速度、pH对抗坏血酸在双链DNA修饰电极上的氧化性能的影响,计算了电子转移系数。     

修饰的GC电极上CO2的电催化还原

研究了高压及常压下玻碳电极还原CO2的反应,以及钴酞菁修饰玻碳电极的电还原CO2行为。结果表明,玻碳电极常压下即可还原CO2,但法拉第效率极低。高压下法拉第效率大大提高,可将CO2还原为CO(31%)和HCOOH(15%)。若用钴钛菁修饰玻碳电极常压下即可将CO2还原,法拉第效率可达30%。     

聚苯胺复合修饰电极对抗坏血酸的电催化氧化

研究了聚苯胺/聚乙烯磺酸盐(PAn/PVS)复合修饰电极的制备及其在中性缓冲溶液中对抗坏血酸(AH2)的电催化性能.结果表明,该复合修饰电极对抗坏血酸具有良好的电催化作用,其催化氧化峰电位为80 mV,催化氧化的温度系数为2.62%/℃.在浓度为1.0×10-6～5.0×10-3 mol/L范围内,催化电流与抗坏血酸的浓度具有良好的线性关系.     

石墨烯修饰电极在药物分析中的应用

总结了近年来国内外的研究成果,分别从抗菌消炎类药物、解热镇痛类药物、神经系统类药物、心脑血管类药物、抗病毒类药物、维生素类药物等几方面综述了石墨烯修饰电极在药物分析中的最新研究进展。     

分析化学中的碳纳米管修饰电极

对碳纳米管修饰电极的研究现状,分类,应用,以及碳纳米管修饰电极的发展趋势作了比较全面的综述。     

Impedance analysis of electrodes modified with a reversible redox polymer film

The study of the kinetics of an electrode coated with a redox polymer film has been carried out using an impedance technique. A theoretical model is proposed which takes into account the diffusion of the active centres. Experimental results are presented for a glassy carbon electrode coated with a [Ru(bpy)₂ poly(4-vinylpyridine)Cl]Cl film. There is good agreement between these results and the model.     

Synthesis and properties of polymer film modified electrodes to detect metal ions

In order to obtain modified polymeric electrodes, polymers were synthesized that are insoluble in water but soluble in common organic solvents and contain different functional groups that are able to coordinate metal ions from low concentrations. Poly(acrylic acid‐co‐styrene), poly(acrylamide‐co‐4‐vinyl pyridine), and poly(styrene‐co‐4‐vinyl pyridine) were synthesized by radical polymerization. The copolymers were characterized by FTIR, ¹H‐NMR, ¹³C‐NMR, scanning electron microscopy, and thermal analysis. The molecular weight and molecular weight distribution were determined by size exclusion chromatography. These complexing polymers were used in the preparation by spin coating of complexing chemically modified electrodes. The polymer film modified electrodes were then tested for the detection of metal ions using the chemical preconcentration and anodic stripping technique. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 1192–1197, 2005     

概述低温等离子体技术及其改性高分子材料研究进展

低温等离子体技术作为清洁、高效的改性技术,赋予材料表面优异性能的同时,并不改变材料基体的整体性质,在高分子材料表面改性中有着越来越广泛的应用前景。综述了低温等离子处理、聚合、诱导接枝聚合等表面改性技术方法,并重点介绍了其在高分子材料亲水性、吸附性、粘结性和生物相容性等方面的改性应用研究进展。     

聚氯乙烯改性最新研究进展

本文介绍了近几年聚氯乙烯物理改性和化学改性方面的研究情况,通过改性进一步拓宽聚氯乙烯的应用领域,具有广阔的发展前景。     

自组装普鲁士蓝膜修饰电极的制备及表征

通过静电自组装技术在Pt电极表面组装了不同层数的普鲁士蓝（PB）膜,得到了PB修饰的Pt电极。分别利用扫描电镜（SEM）和紫外-可见分光光度计（UV-Vis）表征膜的形貌及光学特性,并且采用循环伏安法（CV）测量膜修饰的Pt电极的循环伏安特性。结果表明：通过自组装技术可以制备出可控厚度的纳米尺度的PB膜修饰电极,膜的紫外吸收峰强度与组装层数符合线性关系,膜的组成同时含有可溶和不溶性PB,且循环伏安法所得到的峰电流正比于扫描速度的平方根以及PB的本体浓度,修饰电极具有好的电化学性能,可用于生物传感器。     

酚醛树脂改性研究新进展

从天然植物油和合成有机物2方面阐述改性酚醛树脂的新进展,重点讨论了桐油、聚苯醚、双噁唑啉及苯并噁嗪改性酚醛树脂的情况,简介了本实验室自制热塑性酚醛树脂(Novolak),并以苯噁嗪对Novolak进行的改性研究.     

The electrocatalytic oxidation of ascorbic acid on prussian blue film modified electrodes

It is found for the first time that the electro-oxidation of ascorbic acid can be effectively catalyzed by Prussian blue films with a rate constant of 1.23 × 10⁸ cm³ mol⁻¹ s⁻¹. The kinetics of the reaction was studied in some detail which demonstrates the applicability of the reaction-layer theory of modified electrodes for electrocatalysis to the inorganic mixed-valent compound film.     

Electropolymerized poly(2-vinylpyridine) coatings as ion-exchange polymer modified electrodes

The effects of pH and of the nature and concentration of the electrolyte on the electrochemical behaviour of the Fe(CN)^3–/4– ₆ charge-transfer reaction at a poly(2-vinylpyridine)-coated electrode formed by electropolymerization have been studied. Cyclic voltammetry during the Fe(CN)^3– ₆ incorporation process was combined with measurement of the saturated concentration of the Fe(CN)^3– ₆ confined in the films to investigate the electrochemical behaviour and the fundamental nature of the ion-exchange polymers. The poly(2-vinylpyridine) films formed by electropolymerization were found to have better properties (i.e., larger amount of Fe(CN)^3– ₆ can be incorporated at various pH values and films are more chemically stable under acidic conditions) as polymer-modified electrodes than those formed by solvent evaporation. Of the various anions studied, ClO^– ₄ was found to be distinct from the others (Cl^–, NO^– ₃, Br^– and SO^2– ₄). On the one hand, the polymer films exposed to ClO^– ₄ are more dense and rigid than those exposed to other anions and show relatively little electroactivity. On the other hand, when the films are exposed to increasing concentrations of Cl^–, the films become more swollen, thereby reducing the resistance within the film and enhancing the rate of charge-transfer from the outer film surface to the electrode surface.     

染料敏化太阳电池介孔薄膜电极的研究进展

介绍了染料敏化太阳电池多孔二氧化钛薄膜电极的结构、工作原理及其制备方法,并进一步阐述了减小电荷复合速率、改进薄膜电极性能、提高器件的光电转化效率的方法,主要涉及多孔二氧化钛薄膜电极的复合、掺杂和表面包覆等表面改性处理技术。指出了基于有序二氧化钛薄膜电极、柔性二氧化钛薄膜电极的染料敏化太阳电池和叠层薄膜结构的太阳电池高效的转化效率和应用方便的特点,并在此基础上展望了未来的研究方向。