Shi Erbin, Lin Huiming, Wang Qian, Zhang Feng, Shi Shaoxuan, Zhang Tingting, Li Xin, Niu Hao, Qu Fengyu
College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin, Heilongjiang 150025, P. R. China.
Dalton Trans. 2017 Jan 3;46(2):554-563. doi: 10.1039/c6dt03684h.
A novel ZIF-Ni composite film has been successfully prepared by a facile method involving the in situ deposition of ZIF-8 on a nickel porous film which is fabricated by selectively etching copper from a dense Ni/Cu alloy film. The nanostructures of the resulting ZIF-Ni composite films are carefully examined by a combination of scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, Fourier transform infrared (FT-IR) spectroscopy, energy dispersive X-ray (EDX), and nitrogen adsorption-desorption. Cyclic voltammetric and amperometric studies show the enhanced electrocatalytic properties of the ZIF-Ni composite film electrodes toward hydrazine oxidation relative to the synergistic effect of ZIF-8 and porous Ni films. The application potential of the composite films as amperometric detectors is explored for the determination of hydrazine. A high sensitivity of 805.5 μA mM for hydrazine detection with a low detection limit of 0.021 μM (S/N = 3) and a wide linear range from 2.5 μM to 28 mM are revealed for this new type of composite film as the detecting electrode. Moreover, the composite films exhibit excellent selectivity and remarkable stability for the oxidation of hydrazine. This can offer new opportunities for the fast and selective detection of hydrazine and provide a promising platform for sensor designs for hydrazine detection.
通过一种简便的方法成功制备了一种新型的ZIF-Ni复合膜，该方法包括将ZIF-8原位沉积在镍多孔膜上，而镍多孔膜是通过从致密的Ni/Cu合金膜中选择性蚀刻铜制备的。通过扫描电子显微镜（SEM）、X射线衍射（XRD）分析、傅里叶变换红外（FT-IR）光谱、能量色散X射线（EDX）和氮吸附-脱附相结合的方法，仔细研究了所得ZIF-Ni复合膜的纳米结构。循环伏安法和安培法研究表明，相对于ZIF-8和多孔镍膜的协同效应，ZIF-Ni复合膜电极对肼氧化的电催化性能增强。探索了复合膜作为安培检测器用于测定肼的应用潜力。对于这种新型复合膜作为检测电极，显示出对肼检测的高灵敏度为805.5 μA mM，低检测限为0.021 μM（S/N = 3），线性范围宽，从2.5 μM到28 mM。此外，复合膜对肼的氧化表现出优异的选择性和显著的稳定性。这可以为肼的快速和选择性检测提供新的机会，并为肼检测的传感器设计提供一个有前景的平台。
