Ru-Jia Yu,Wei Ma,Mao-Pan Peng,Zhi-Shan Bai,Yi-Tao Long
A novel redox-mediated chromogenic reaction was demonstrated based on the reaction between HAuCl 4 and 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), which generate various color responses from red to green in the resulting solutions. Various redox substance could be used to mediate the reaction and trigger a distinct color response. We established a sensitive hydrogen peroxide colorimetric sensor based on the redox-mediated chromogenic reaction and depicted the application both in detection of enzyme and in an immunoassay . Combining the traditional chromogenic reagent with gold nanoparticles , our assay has the advantage in short response time (within three minutes), high sensitivity (10 −12 g mL −1 for HBsAg) and stability.
Guofu Ma,Enke Feng,Kanjun Sun,Hui Peng,Jiajia Li,Ziqiang Lei
A supercapacitor utilize a novel redox-mediated gel polymer (PVA-KOH-PPD) as electrolyte and separator, and activated carbon as electrodes is assembled. The PVA-KOH-PPD gel polymer as potential electrolyte for supercapacitor is investigated by cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy techniques. It is found that the supercapacitor exhibits high ionic conductivity (25 mS cm −1 ), large electrode specific capacitance (611 F g −1 ) and high energy density (82.56 Wh kg −1 ). The high performance is attributed to the addition of quick redox reactions at the electrolyte|electrode interface as PPD undergoes a two-proton/two-electron reduction and oxidation during cycling. Furthermore, the supercapacitor with PVA-KOH-PPD gel polymer shows excellent charge-discharge stability, after 1000 charge-discharge cycles, the supercapacitor still retains a high electrode specific capacitance of 470 F g −1 . It is believed that the idea using redox mediator has a good prospect for improving the performances of supercapacitors.
危险品化学品经营许可证（带存储）