Journal of Nanoparticle Research ( IF 2.1 ) Pub Date : 2021-07-23 , DOI: 10.1007/s11051-021-05277-3 Shining Wu 1 , Haoran Wang 1 , Bo Zhao 1 , Tongtong Cao 1 , Juanjuan Ma 1 , Lin Liu 1 , Zhiwei Tong 1, 2 , Lingxuan Li 3 , Jianjun Ruan 4 , Jiakai Cao 4
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A layered FeTMPyP/Sr2Nb3O10 nanocomposite was successfully synthesized by intercalating positively charged 5,10,15,20-tetrakis (N-methylpyridinium-4-yl) porphyrinato iron (FeTMPyP) into KSr2Nb3O10 via exfoliation/restacking method. The structure and morphology of FeTMPyP/Sr2Nb3O10 nanocomposite was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), energy-dispersive spectrometer analysis (EDS), and Fourier transform infrared spectroscopy (FTIR). The FeTMPyP molecules are intercalated in the Sr2Nb3O10 layer with a tilt angle of 57°. The electrochemical properties of FeTMPyP/Sr2Nb3O10-modified electrode were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). The results show that FeTMPyP/Sr2Nb3O10 exhibits excellent performance for the electrochemical oxidation of nitrite. The possible mechanism for the electrochemical oxidation of NaNO2 on the FeTMPyP/Sr2Nb3O10-modified electrode was proposed. This modified electrode can detect nitrite in the concentration range of 0.02 to 1.35 mM with the detection limit of 1.2 μM. Moreover, this nanocomposite exhibits good stability and excellent anti-interference ability.
Graphical abstract
中文翻译：
用于检测河水中亚硝酸盐的锶铌铁卟啉纳米复合材料的合成
层状FeTMPyP / SR 2的Nb 3 ö 10纳米复合材料已成功地嵌入带正电的5,10,15,20-四合成（Ñ -methylpyridinium -4-基）卟啉铁（FeTMPyP）到KSR 2的Nb 3 ö 10经由剥离/重新堆叠方法。FeTMPyP/Sr 2 Nb 3 O 10纳米复合材料的结构和形貌通过X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、能谱分析（EDS）和傅立叶分析表征变换红外光谱 (FTIR)。FeTMPyP 分子嵌入 Sr 2倾斜角为57°的Nb 3 O 10层。通过循环伏安法(CV)、电化学阻抗谱(EIS)和差分脉冲伏安法(DPV)研究了FeTMPyP/Sr 2 Nb 3 O 10修饰电极的电化学性能。结果表明，FeTMPyP/Sr 2 Nb 3 O 10表现出优异的亚硝酸盐电化学氧化性能。FeTMPyP/Sr 2 Nb 3 O 10上NaNO 2电化学氧化的可能机制提出了修饰电极。该修饰电极可检测浓度范围为 0.02 至 1.35 mM 的亚硝酸盐，检测限为 1.2 μM。此外，这种纳米复合材料表现出良好的稳定性和优异的抗干扰能力。
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