Magnetic nanoparticles loaded on mobile crystalline material-41: preparation, characterization and application as a novel material for the construction of an electrochemical nanosensor
作者:Mohammad Hasanzadeh、Arash Bahrami、Mohammad Alizadeh、Nasrin Shadjou
DOI:10.1039/c3ra42393j
日期:——
Herein, we envisage the possibility of preparing stable magnetic mobile crystalline material-41 using cetyltrimethylammonium bromide and Fe3O4 nanoparticles. The Fe3O4 nanoparticles are incorporated into mobile crystalline material-41 in hydrothermal conditions. The prepared mesoporous sample was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and nitrogen adsorption–desorption techniques. The electrochemical behavior of cadaverine, histamine and putrescine was investigated on magnetic mobile crystalline material-41 (MCM-41-Fe2O3) modified carbon paste electrodes (CPEs). Due to the very large surface area (1213 m2 g−1) and the remarkable electrocatalytic properties of Fe2O3 nanoparticles, MCM-41-Fe2O3 exhibits potent electrocatalytic activity toward the electrooxidation of some selected biogenic amines. MCM-41-Fe2O3-CPEs provide new capabilities for electrochemical sensing by combining the advantages of Fe2O3 magnetic nanoparticles and MCM-41 with a very large surface area. The process of oxidation and its kinetics were established by using cyclic voltammetry, chronoamperometry techniques, and also, steady state polarization measurements. The apparent electron transfer rate constant (Ks) and transfer coefficient (α) were determined by cyclic voltammetry and were approximately 6.2 s−1 and 0.48, respectively. The linear concentration ranges of the proposed sensors for cadaverine, histamine and putrescine were 0.1–10, 0.01–0.5 and 0.9–35 μM, respectively. Finally, the applicability of the sensor to the determination of electroactive biogenic amine concentrations in fish samples has been successfully demonstrated.
在此,我们设想利用十六烷基三甲基溴化铵和Fe3O4纳米颗粒制备稳定的磁性移动晶体材料41。Fe3O4纳米颗粒在水热条件下被纳入移动晶体材料41中。所制备的介孔样品通过傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)、扫描电子显微镜(SEM)和氮气吸附-脱附技术进行了表征。我们在改性碳糊电极(CPEs)上研究了尸胺、组胺和腐胺的电化学行为。由于Fe2O3纳米颗粒具有非常大的表面积(1213 m² g⁻¹)和显著的电催化特性,MCM-41-Fe2O3对某些选定的生物胺的电氧化表现出强大的电催化活性。MCM-41-Fe2O3-CPEs通过结合Fe2O3磁性纳米颗粒和具有非常大表面积的MCM-41的优点,为电化学传感提供了新的能力。通过循环伏安法、计时安培法以及稳态极化测量确定了氧化过程及其动力学。表观电子转移速率常数(Ks)和转移系数(α)通过循环伏安法测定,分别约为6.2 s⁻¹和0.48。所提传感器对尸胺、组胺和腐胺的线性浓度范围分别为0.1–10、0.01–0.5和0.9–35 μM。最后,成功演示了传感器在鱼样品中测定电活性生物胺浓度的适用性。