College of Sciences, Shanghai University, Shanghai 200444, PR China.
Analyst. 2019 Jan 21;144(2):685-690. doi: 10.1039/c8an01876f. Epub 2018 Dec 5.
In this work, copper/cuprous oxide (Cu/CuO) nanocomposites were electrodeposited on a fluorine doped tin oxide (FTO) glass substrate for sensitive determination of hydrogen peroxide (HO). The Cu/CuO nanocomposites were synthesized on FTO at a constant current density of -0.4 mA cm in 0.3 M CuSO (pH 9.5) under magnetic agitation. The composition and morphology of Cu/CuO nanocomposites were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy and X-ray photoelectron spectroscopy. Taking advantage of the synergistic effects of Cu and CuO, the fabricated Cu/CuO/FTO electrode showed excellent electrocatalytic activity towards the oxidation of HO. The electrocatalytic performance of Cu/CuO/FTO was evaluated by linear sweep voltammetry and amperometry. Under optimized conditions, the developed sensor exhibited a wide linear range of 0.2-2000 μM for the determination of HO with a detection limit of 0.04 μM (S/N = 3). In addition, the proposed HO sensor was successfully applied for the determination of HO in milk samples, indicating that the electrodeposited Cu/CuO nanocomposites are promising nanomaterials for electrochemical sensors.
在这项工作中，铜/氧化亚铜（Cu/CuO）纳米复合材料通过恒电流密度在磁场搅拌下于 0.3 M CuSO（pH 9.5）中在 FTO 玻璃基底上电沉积，用于灵敏测定过氧化氢（HO）。通过 X 射线衍射、扫描电子显微镜、能谱和 X 射线光电子能谱对 Cu/CuO 纳米复合材料的组成和形貌进行了表征。利用 Cu 和 CuO 的协同效应，所制备的 Cu/CuO/FTO 电极对 HO 的氧化表现出优异的电催化活性。通过线性扫描伏安法和安培法评估了 Cu/CuO/FTO 的电催化性能。在优化条件下，开发的传感器对 HO 的测定具有 0.2-2000 μM 的宽线性范围，检测限为 0.04 μM（S/N = 3）。此外，该 HO 传感器成功应用于牛奶样品中 HO 的测定，表明电沉积的 Cu/CuO 纳米复合材料是电化学传感器有前途的纳米材料。
