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The Hybrid of Gold Nanoparticles and 3D Flower-like MnO2 Nanostructure with Enhanced Activity for Detection of Hydrogen Peroxide
Electroanalysis ( IF 3 ) Pub Date : 2017-11-16 , DOI: 10.1002/elan.201700584
Qinglin Sheng 1 , Xiujuan Qiao 1 , Jianbin Zheng 1
Affiliation  

3D Flower-like manganese dioxide (MnO2) nanostructure with the ability of catalysis for hydrogen peroxide (H2O2) and super large area that can support gold nanoparticles (AuNPs) with enhanced activity of electron transfer have been developed. The nanostructure of hybrids was prepared by directly mixing citric-capped AuNPs and 3-aminopropyltriethoxysilane (3-APTES)-capped nano-MnO2 using an electrostatic adsorption strategy. The Au-MnO2 composite was extensively characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), the Brunauer-Emmett-Teller (BET) method and X-ray photoemission spectroscopy (XPS). Electrochemical properties were evaluated through cyclic voltammetry (CV) and amperometric method. The prepared sensor showed excellent electrochemical properties towards H2O2 with a wide linear range from 2.5×10−3∼1.39 mM and 3.89∼13.89 mM. The detection limit is 0.34 μM (S/N=3) with the sensitivities of 169.43 μA mM−1 cm−2 and 55.72 μA mM−1 cm−2. The detection of real samples was also studied. The result exhibited that the prepared sensor can be used for H2O2 detection in real samples.

中文翻译:

金纳米颗粒和 3D 花状 MnO2 纳米结构的混合,具有增强的检测过氧化氢的活性

3D 花状二氧化锰 (MnO2) 纳米结构具有催化过氧化氢 (H2O2) 和超大面积的能力,可以支持具有增强电子转移活性的金纳米粒子 (AuNPs)。通过使用静电吸附策略直接混合柠檬酸封端的AuNPs和3-氨基丙基三乙氧基硅烷(3-APTES)封端的纳米MnO2制备杂化物的纳米结构。Au-MnO2 复合材料通过扫描电子显微镜 (SEM)、X 射线衍射 (XRD)、傅里叶变换红外光谱 (FTIR)、Brunauer-Emmett-Teller (BET) 方法和 X 射线光电发射光谱 (XPS) 进行了广泛表征)。通过循环伏安法(CV)和电流法评估电化学性能。制备的传感器对 H2O2 表现出优异的电化学性能,线性范围为 2.5×10-3∼1.39 mM 和 3.89∼13.89 mM。检测限为 0.34 μM (S/N=3),灵敏度为 169.43 μA mM-1 cm-2 和 55.72 μA mM-1 cm-2。还研究了真实样品的检测。结果表明,所制备的传感器可用于实际样品中的H2O2检测。
更新日期:2017-11-16
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