Djelad Halima, Benyoucef Abdelghani, Morallón Emilia, Montilla Francisco
Laboratoire des Sciences et Techniques de l'Eau, University of Mascara, Bp 763 Mascara 29000, Algeria.
Departamento de Química Física e Instituto Universitario de Materiales, Universidad de Alicante, Ap. 99, E-03080 Alicante, Spain.
Materials (Basel). 2020 Mar 6;13(5):1200. doi: 10.3390/ma13051200.
Hybrid silica-modified materials were synthesized on glassy carbon (GC) electrodes by electroassisted deposition of sol-gel precursors. Single-wall carbon nanotubes (SWCNTs) were dispersed in a silica matrix (SWCNT@SiO) to enhance the electrochemical performance of an inorganic matrix. The electrochemical behavior of the composite electrodes was tested against the ferrocene redox probe. The SWCNT@SiO presents an improvement in the electrochemical performance towards ferrocene. The heterogeneous rate constant of the SWCNT@SiO can be enhanced by the insertion of poly(3,4-Ethylendioxythiophene)-poly(sodium 4-styrenesulfonate) PEDOT-PSS within the silica matrix, and this composite was synthesized successfully by reactive electrochemical polymerization of the precursor EDOT in aqueous solution. The SWCNT@SiO-PEDOT-PSS composite electrodes showed a heterogeneous rate constant more than three times higher than the electrode without conducting polymer. Similarly, the electroactive area was also enhanced to more than twice the area of SWCNT@SiO-modified electrodes. The morphology of the sample films was analyzed by scanning electron microscopy (SEM).
通过溶胶 - 凝胶前驱体的电辅助沉积在玻碳（GC）电极上合成了杂化二氧化硅改性材料。将单壁碳纳米管（SWCNT）分散在二氧化硅基质（SWCNT@SiO）中以增强无机基质的电化学性能。以二茂铁氧化还原探针测试复合电极的电化学行为。SWCNT@SiO对二茂铁的电化学性能有所改善。通过在二氧化硅基质中插入聚（3,4 - 乙撑二氧噻吩）- 聚（4 - 苯乙烯磺酸钠）（PEDOT - PSS），可以提高SWCNT@SiO的异质速率常数，并且通过前驱体EDOT在水溶液中的反应性电化学聚合成功合成了这种复合材料。SWCNT@SiO - PEDOT - PSS复合电极显示出的异质速率常数比没有导电聚合物的电极高出三倍以上。同样，电活性面积也增加到SWCNT@SiO改性电极面积的两倍以上。通过扫描电子显微镜（SEM）分析了样品薄膜的形态。
