CAJ | 학술논문

利用Nafion分散和成膜作用、多壁碳纳米管（MWCNTs）优良的导电能力和大的比表面积研制的化学修饰电极（Nafion-MWCNTs/GCE），表征修饰电极的结构与性能，发现Nafion-MWCNTs/GCE修饰电极对没食子酸有显著的电催化氧化作用．实验表征电化学动力学性质结果显示，没食子酸的氧化过程是双电子双质子过程，电极的扩散系数及速率常数分别为2.81×10-5 cm2/s及2.89×10-3 mol/（L·s）．通过实验优化条件，建立直接、快速电分析测定没食子酸的方法，线性范围为5.82×10-7～6.30×10-5 mol/L和1.30×10-4～2.39×10-4 mol/L，检出限为2.8×10-7 mol/L，测定10次的相对标准偏差（RSD）为2.45％，可用于没食子酸样品的质量分数测定．
이용Nafion분산화성막작용、다벽탄납미관（MWCNTs）우량적도전능력화대적비표면적연제적화학수식전겁（Nafion-MWCNTs/GCE），표정수식전겁적결구여성능，발현Nafion-MWCNTs/GCE수식전겁대몰식자산유현저적전최화양화작용．실험표정전화학동역학성질결과현시，몰식자산적양화과정시쌍전자쌍질자과정，전겁적확산계수급속솔상수분별위2.81×10-5 cm2/s급2.89×10-3 mol/（L·s）．통과실험우화조건，건립직접、쾌속전분석측정몰식자산적방법，선성범위위5.82×10-7～6.30×10-5 mol/L화1.30×10-4～2.39×10-4 mol/L，검출한위2.8×10-7 mol/L，측정10차적상대표준편차（RSD）위2.45％，가용우몰식자산양품적질량분수측정．
Using the dispersion and film-forming function of Nafion,the excellent electrical conductivity of the multi-walled carbon nanotubes (MWCNTs),and chemically modified electrode (Nafion- MWCNTs /GCE)of specific surface area by coating technology studied the Nafion-MWCNTs/GCE's structure and performance.It has been found that Nafion-MWCNTs/GCE can catalyze the electro-oxidation of gallic acid.The results indicated that the electro-oxidation of gallic acid has a two-electron and two-proton transfer process on the Nafion-MWCNTs/GCE.Diffusion coefficient (D)was 2.81 ×10 -5 cm2/s and rate constant (k)was 2.89 ×10 -3 mol/(L·s). The direct fast method of electro analysis determination of Gallic Acid has been set by using several optimized experimental conditions. The linear calibration ranges for gallic acid were 5.82 ×10 -7-6.30 ×10 -5 mol/L and 1.30 ×10 -4-2.39 ×10 -4 mol/L with a detec-tion limit of 2.80 ×10 -7 mol/L.The RSD of sample analysis of gallic acid were 2.45%in 10 times.This simple method could be ap-plied to determine the mass fraction of gallic acid.