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用于镓传感能力的聚（吡咯 - 甲苯胺）包裹的CoFeO/R（氧化石墨烯 - 氧化单壁碳纳米管）三元复合材料

Poly(pyrrole--toluidine) wrapped CoFeO/R(GO-OXSWCNTs) ternary composite material for Ga sensing ability.

作者信息

Katowah Dina F, Hussein Mahmoud A, Alam M M, Sobahi T R, Gabal M A, Asiri Abdullah M, Rahman Mohammed M

机构信息

Chemistry Department, Faculty of Science, King Abdulaziz University P. O. Box 80203 Jeddah 21589 Saudi Arabia

Polymer Chemistry Lab, Chemistry Department, Faculty of Science, Assiut University Assiut 71516 Egypt.

出版信息

RSC Adv. 2019 Oct 16;9(57):33052-33070. doi: 10.1039/c9ra03593a. eCollection 2019 Oct 15.

DOI:10.1039/c9ra03593a
PMID:35529122
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9073328/
Abstract

In this study, we report a novel ternary conductive hybrid material with high stability, conductivity, and excellent electrochemical Ga sensing ability. Ternary poly(pyrrole--toluidine)/CoFeO/reduced graphene oxide-oxidized single-wall carbon nanotube nanocomposites in the form of P(Py--OT)/CF/R(GO-OXSWCNTs) NCs have been synthesized through an chemical polymerization method a facile three-step approach. Single phase CoFeO (CF) nanoparticles (NPs) were synthesized using an egg white method, while reduced graphene oxide-oxidized single-wall carbon nanotubes R(GO-OXSWCNTs) were prepared co-reduction of graphene oxide along with oxidized SWCNTs flowed by coating CF and R(GO-OXSWCNTs) with a poly(pyrrole--toluidine) matrix P(Py--OT) copolymer. The results of X-ray diffraction spectroscopy (XRD), Fourier-transform infrared spectroscopy (FTIR) and Raman indicated that the P(Py--OT)/CF/R(GO-OXSWCNTs) NCs were effectively synthesized with strong interactions among the constituents. The thermal stability of P(Py--OT)/CF/R(GO-OXSWCNTs) NCs is considerably enhanced in the composite format. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM) demonstrated that CF and R(GO-OXSWCNTs) were well coated by P(Py--OT). The electrical conductivity study showed that P(Py--OT) and R(GO-OXSWCNTs) might significantly improve the conductivity and the electrochemical performance of the CF. A Ga ion selective electrochemical sensor was fabricated by coating a glassy carbon electrode (GCE) with synthesized P(Py--OT)/CF/R(GO-OXSWCNTs) NCs by using 5% Nafion binder. The slope of the calibration curve was used to calculate the sensor's analytical parameters, such as sensitivity (13.0569 μA μM cm), detection limit (96.27 ± 4.81 pM), quantification limit (43.523 pM), response time, reproducibility, large linear dynamic range, and linearity. The validation of the P(Py--OT)/CF/R(GO-OXSWCNTs) NCs/GCE sensor probe was investigated by a standard addition method (recovery) in the presence of various environmental samples and satisfying results were obtained.

摘要

在本研究中，我们报道了一种新型的三元导电混合材料，其具有高稳定性、导电性以及出色的电化学镓传感能力。通过一种简便的三步化学聚合法合成了呈P(Py-OT)/CF/R(GO-OXSWCNTs)纳米复合材料形式的三元聚(吡咯-邻甲苯胺)/钴铁氧化物/还原氧化石墨烯-氧化单壁碳纳米管纳米复合材料。采用蛋清法合成了单相钴铁氧化物(CF)纳米颗粒(NPs)，通过氧化石墨烯与氧化单壁碳纳米管的共还原制备了还原氧化石墨烯-氧化单壁碳纳米管R(GO-OXSWCNTs)，随后用聚(吡咯-邻甲苯胺)基体P(Py-OT)共聚物包覆CF和R(GO-OXSWCNTs)。X射线衍射光谱(XRD)、傅里叶变换红外光谱(FTIR)和拉曼光谱结果表明，P(Py-OT)/CF/R(GO-OXSWCNTs)纳米复合材料已有效合成，其各组分之间存在强相互作用。P(Py-OT)/CF/R(GO-OXSWCNTs)纳米复合材料的热稳定性在复合形式下得到显著提高。扫描电子显微镜(SEM)、透射电子显微镜(TEM)和原子力显微镜(AFM)表明，CF和R(GO-OXSWCNTs)被P(Py-OT)良好包覆。电导率研究表明，P(Py-OT)和R(GO-OXSWCNTs)可显著提高CF的电导率和电化学性能。通过使用5%的Nafion粘合剂，将合成的P(Py-OT)/CF/R(GO-OXSWCNTs)纳米复合材料涂覆在玻碳电极(GCE)上，制备了一种镓离子选择性电化学传感器。利用校准曲线的斜率计算传感器的分析参数，如灵敏度(13.0569 μA μM cm)、检测限(96.27±4.81 pM)、定量限(43.523 pM)、响应时间、重现性、大线性动态范围和线性度。通过标准加入法(回收率)在各种环境样品存在下研究了P(Py-OT)/CF/R(GO-OXSWCNTs) NCs/GCE传感器探针的有效性，并获得了满意的结果。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83fa/9073328/abac9939a4c6/c9ra03593a-f13.jpg
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