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该文利用循环伏安法(CV)和线性扫描溶出伏安法(LSSV)研究了对苯二酚(HQ)和间苯二酚(RS)在聚噻吩/纳米二氧化钛修饰玻碳电极(PTh/NTiO2/GCE)上的电化学行为。该修饰电极作为两种苯二酚传感器表现出极好的灵敏度和选择性。在0.2mol/L柠檬酸-磷酸氢二钠缓冲溶液(pH 4.6),RS和HQ的氧化峰电位相距508 mV,且在PTh/NTiO2/GCE上的峰比在裸GCE上的高出6.5倍。在最佳条件下,PTh/NTiO2/GCE对HQ和RS在1.0×10-7～8.0×10-6范围内都有较好的线性关系,混合物中的检出限(S/N=3)分别为3.3×10-8 mol/L和3.7×10-8 mol/L。通过计算得出了一些动力学参数如电子转移数(n),质子转移数(m)。该法被用来同时测定废水中的RS和HQ结果满意。
In this paper, cyclic voltammetry (CV) and linear sweep stripping voltammetry (LSSV) were used to study the effect of hydroquinone (HQ) and resorcinol (RS) on polythiophene / NTiO2 / GCE) on the electrochemical behavior. The modified electrode exhibits excellent sensitivity and selectivity as two kinds of resorcinol sensors. In 0.2 mol / L citric acid-disodium hydrogen phosphate buffer (pH 4.6), the peak potentials of RS and HQ were 508 mV and the peak at PTh / NTiO2 / GCE was 6.5 times higher than that on bare GCE . Under the best conditions, the linearity of H / H and RS in the range of 1.0 × 10-7 ~ 8.0 × 10-6 for PTh / NTiO2 / GCE was obtained. The detection limit (S / N = 3) Respectively, 3.3 × 10-8 mol / L and 3.7 × 10-8 mol / L. Some kinetic parameters such as electron transfer number (n) and proton transfer number (m) were calculated. The method was used to determine the RS and HQ in wastewater simultaneously with satisfactory results.