PG & Research Department of Chemistry, Thiagarajar College, Madurai 625009, Tamilnadu, India.
PG & Research Department of Chemistry, Thiagarajar College, Madurai 625009, Tamilnadu, India; Mother Teresa Women's University, Kodaikanal 624 102, Tamilnadu, India.
Ultrason Sonochem. 2018 Mar;41:651-660. doi: 10.1016/j.ultsonch.2017.10.032. Epub 2017 Nov 1.
Herein, we report a one-pot synthesis of structurally uniform and electrochemically active graphitic carbon nitride/nickel oxide (g-CN/NiO) nanocomposite and an investigation on the electrocatalytic oxidation of quercetin (QR). The synthesized g-CN/NiO nanocomposite has uniform surface distribution, which was characterized with scanning electron microscopy (SEM). Moreover, the composition of synthesized g-CN/NiO nanocomposite was characterized by UV-vis-spectroscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR spectra), BET, SEM and HRTEM. The g-CN/NiO was electrochemically treated in 0.1 MPBS solution through cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The peak current response increases linearly with QR concentration from 0.010 μM to 250 µM with a fast response time of less than 2 s and a detection limit of 0.002 μM. To further evaluate the feasibility of using this sensor for real sample analysis, QR content in various real samples including green tea, green apple, honey suckle were determined and satisfactory results were achieved.
在此，我们报告了一种一锅法合成结构均匀且具有电化学活性的石墨相氮化碳/氧化镍（g-CN/NiO）纳米复合材料，并研究了槲皮素（QR）的电催化氧化。所合成的 g-CN/NiO 纳米复合材料具有均匀的表面分布，这一点通过扫描电子显微镜（SEM）得到了证实。此外，通过紫外可见分光光度计（UV-vis-spectroscopy）、X 射线衍射（XRD）、傅里叶变换红外光谱（FT-IR 谱图）、BET、SEM 和高分辨率透射电子显微镜（HRTEM）对合成的 g-CN/NiO 纳米复合材料的组成进行了表征。通过循环伏安法（CV）和差分脉冲伏安法（DPV），将 g-CN/NiO 在 0.1MPBS 溶液中进行电化学处理。随着 QR 浓度从 0.010μM 增加到 250μM，峰电流响应呈线性增加，响应时间小于 2s，检测限为 0.002μM。为了进一步评估该传感器用于实际样品分析的可行性，我们测定了包括绿茶、青苹果、金银花在内的各种实际样品中的 QR 含量，获得了令人满意的结果。
