期刊：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2019年166(10):B805-B813 ISSN：0013-4651
通讯作者：
Li, Guangli;Deng, Peihong
作者机构：
[Tuo, Du; He, Quanguo; Li, Guangli; Tian, Yaling; Wu, Yiyong; Liu, Jun] Hunan Univ Technol, Coll Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[He, Quanguo; Li, Guangli; Deng, Peihong; Deng, PH; Li, GL; Liu, Jun] Hengyang Normal Univ, Hunan Prov Key Lab Funct Metal Organ Cpds, Key Lab Funct Organometall Mat Hunan Prov Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[He, Quanguo; Li, Guangli; Liu, Jun; Chen, Dongchu] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.;[Xia, Yonghui] Zhuzhou Inst Food & Drug Control, Zhuzhou 412000, Peoples R China.
通讯机构：
[Li, Guangli; Deng, PH; Li, GL] H;[Li, Guangli] F;Hunan Univ Technol, Coll Life Sci & Chem, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Hunan Prov Key Lab Funct Metal Organ Cpds, Key Lab Funct Organometall Mat Hunan Prov Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.
摘要：
A facile voltammetric sensor based on MnO2 nanorods/electro-reduced graphene oxide composite modified glassy carbon electrode (MnO(2)NRs-ERGO/GCE) was proposed for the detection of Rhodamine B (RhB). The MnO(2)NRs-ERGO/GCE was fabricated by a facile drop-casting approach followed by a potentiostatic reduction technique. A well-shaped oxidation peak of RhB was observed at the MnO(2)NRs-ERGO/GCE, and the response peak current was 17-fold and 2-fold higher than that of bare GCE and ERGO/GCE respectively, attributing to the synergistic electrocatalytic effect from ERGO sheets and MnO(2)NRs. Under the optimal analytical conditions, the response peak currents linearly increased with the RhB concentrations varying from 0.02 mu M to 1.0 mu M and from 1.0 mu M to 20 mu M. The limit of detection (LOD, S/N=3) was 6.0 nM. Furthermore, the MnO(2)NRs-ERGO/GCE showed good selectivity, repeatability, reproducibility and stability. Finally, the MnO(2)NRs-ERGO/GCE was successfully employed to detect RhB in different commercial chili-containing foodstuffs, and the results were in good accordance with the values that detected by high-performance liquid chromatography. Combining with low cost and portable electrochemical apparatus, the proposed sensor is especially suitable for the in-situ detection of RhB in actual food samples. (c) 2019 The Electrochemical Society.
摘要：
The nanohybrid of electrochemically-reduced graphene oxide (ERGO) nanosheets decorated with MnO(2) nanorods (MnO(2) NRs) was modified on the surface of a glassy carbon electrode (GCE). Controlled potential reduction was applied for the reduction of graphene oxide (GO). The characterization was performed by scanning electron microscopy, X-ray diffraction and cyclic voltammetry. Compared with the poor electrochemical response at bare GCE, a well-defined oxidation peak of sunset yellow (SY) was observed at the MnO(2) NRs-ERGO/GCE, which was attributed to the high accumulation efficiency as well as considerable electrocatalytic activity of ERGO and MnO(2) NRs on the electrode surface. The experimental parameters for SY detection were optimized in detail. Under the optimized experiment conditions, the MnO(2) NRs-ERGO/GCE showed good linear response to SY in concentration range of 0.01(-)2.0 muM, 2.0(-)10.0 muM and 10.0(-)100.0 muM with a detection limit of 2.0 nM. This developed method was applied for SY detection in soft drinks with satisfied detected results.
摘要：
A promising sensing platform for the ultrasensitive detection of dopamine (DA) has been constructed using MnO2 nanowires-electrochemically reduced graphene oxide modified glassy carbon electrode (MnO2 NWs-ErGO/GCE). The proposed MnO2 NWs-ErGO/GCEs had the large electrochemical active area and relative low charge transfer resistant (R-ct). As a result, the response peak current of the MnO2 NWs-ErGO is about 13 times higher than that of the bare GCE, demonstrating the remarkable electrocatalytic activity toward DA. The electrochemical kinetics revealed that DA oxidation is quasi-reversible reaction coupling with one electron and two protons. Three linear ranges (0.01 mu M - 0.10 mu M, 0.10 mu M - 1.0 mu M, and 1.0 mu M - 80 mu M) were obtained on the MnO2 NWs-ErGO/GCE, with a low detection limit of 1.0 nM (S/N = 3). Moreover, the response current was almost unaltered even in the presence of 100-fold ascorbic acid (AA) and uric acid (UA), suggesting MnO2 NWs-ErGO has good selectivity toward DA. Finally, the MnO2 NWs-ErGO/GCEs were successfully applied to detect DA in the injection solutions and human blood serum samples with high accuracy and good recovery. (C) 2018 Elsevier Ltd. All rights reserved.
作者机构：
[He, Quanguo; Li, Guangli; Tian, Yaling; Wu, Yiyong; Liu, Jun] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Hunan Prov Key Lab Funct Met Organ Cpds, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[He, Quanguo; Deng, Peihong; Deng, PH; Chen, Dongchu] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.
通讯机构：
[Deng, Peihong] H;[Deng, PH; Chen, DC] F;Hengyang Normal Univ, Hunan Prov Key Lab Funct Met Organ Cpds, Hengyang 421008, Peoples R China.;Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
摘要：
A new electrochemical sensor for nanomolar rutin detection based on amine-functionalized Fe(3)O(4) nanoparticles and electrochemically reduced graphene oxide nanocomposite modified glassy carbon electrode (NH(2)-Fe(3)O(4) NPs-ErGO/GCE) was fabricated through a simple method, and the X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), transmission electron microscope (TEM), vibrating sample magnetometer (VSM) and electrochemical technique were used to characterize the modified electrode. The electrochemical behavior of rutin on the Fe(3)O(4) NPs-ErGO/GCE was studied in detail. The electrochemical response of rutin at this modified electrode was remarkably higher than that of the bare GCE or other modified GCE (GO/GCE, Fe(3)O(4) NPs-GO/GCE, and ErGO/GCE). Under the optimum determination conditions, Fe(3)O(4) NPs-ErGO/GCE provided rutin with a broader detection range of 6.0 nM(-)0.1 microM; 0.1(-)8.0 microM and 8.0(-)80 microM, a minimum detectable concentration of 4.0 nM was obtained after 210 s accumulation. This novel method was applied in determination of rutin in pharmaceutical tablets and urine samples with satisfactory results.
作者机构：
[He, Quanguo; Li, Guangli; Tian, Yaling; Wu, Yiyong; Liu, Jun] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;[He, Quanguo; Tian, Yaling; Deng, Peihong; Wu, Yiyong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[He, Quanguo; Chen, Dongchu] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Peoples R China.
通讯机构：
[Deng, Peihong] H;[Chen, Dongchu] F;Hengyang Normal Univ, Key Lab Funct Met Organ Cpds Hunan Prov, Hengyang 421008, Peoples R China.;Hengyang Normal Univ, Key Lab Funct Organometall Mat Hunan Prov Univ, Hengyang 421008, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Xu, Zhifeng] H;Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Copper (II) ion;Ion imprinted polymer;1,8-naphthalimide;Ion recognition;Fluorescence emission
摘要：
In the present study, a fluorescent ion-imprinted sensor (FIIS) for rapid and convenient detection of Cu2+ ions was fabricated. A fluorescent polymerizable ligand, i.e., 4-(2-aminomethyl)pyridine-N-allylnaphthalimide, was designed and synthesized. The FIIS was prepared by surface functionalization of PVDF membrane with a thin layer of copper (II) ion-imprinted polymer using the synthesized ligand as the fluorescent functional monomer. The intensity of fluorescence emission of FIIS decreased linearly with the increase of copper (II) ions concentration in the range of 0-70.0 mu M. The results of selectivity tests indicated that FIIS has high specific recognition ability for Cu2+ ions. The recoveries for the spiked samples were in the range of 96.4-104.4%, and the relative standard deviations (RSDs) were found to be 2.17-4.75%. The FIIS was successfully applied to the determination of copper (II) ions in real water samples. The Limits of detection (LODs) for Cu2+ ions in real water samples were in the range of 0.11-0.14 uM. The present study provided a feasible strategy for construction of fluorescent ion-imprinted sensor for convenient, sensitive and selective detection of metal ions. (C) 2017 Elsevier B.V. All rights reserved.
作者：
He Quan-Guo;Liang Jing;Li Guang-Li*;Deng Pei-Hong*;Liu Jun;...
期刊：
分析化学,2018年46(3):438-445 ISSN：0253-3820
通讯作者：
Li Guang-Li;Deng Pei-Hong
作者机构：
[He Quan-Guo; Li Guang-Li; Liu Xiao-Peng; Liang Jing; Liu Jun] Hunan Univ Technol, Coll Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[Deng Pei-Hong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Li Guang-Li; Deng Pei-Hong] H;Hunan Univ Technol, Coll Life Sci & Chem, Zhuzhou 412007, Peoples R China.;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
摘要：
Control and detection of sunset yellow is an utmost demanding issue, due to the presence of potential risks for human health if excessively consumed or added. Herein, cuprous oxide-electrochemically reduced graphene nanocomposite modified glassy carbon electrode (Cu(2)O-ErGO/GCE) was developed for the determination of sunset yellow. The Cu(2)O-ErGO/GCE was fabricated by drop-casting Cu(2)O-GO dispersion on the GCE surface following a potentiostatic reduction of graphene oxide (GO). Scanning electron microscope and X-ray powder diffractometer was used to characterize the morphology and microstructure of the modification materials, such as Cu(2)O nanoparticles and Cu(2)O-ErGO nanocomposites. The electrochemical behavior of sunset yellow on the bare GCE, ErGO/GCE, and Cu(2)O-ErGO/GCE were investigated by cyclic voltammetry and second-derivative linear sweep voltammetry, respectively. The analytical parameters (including pH value, sweep rate, and accumulation parameters) were explored systematically. The results show that the anodic peak currents of Cu(2)O-ErGO /GCE are 25-fold higher than that of the bare GCE, due to the synergistic enhancement effect between Cu(2)O nanoparticles and ErGO sheets. Under the optimum detection conditions, the anodic peak currents are well linear to the concentrations of sunset yellow, ranging from 2.0 x 10(-8) mol/L to 2.0 x 10(-5) mol/L and from 2.0 x 10(-5) mol/L to 1.0 x 10(-4) mol/L with a low limit of detection (S/N = 3, 6.0 x 10(-9) mol/L). Moreover, Cu(2)O-ErGO/GCE was successfully used for the determination of sunset yellow in beverages and food with good recovery. This proposed Cu(2)O-ErGO/GCE has an attractive prospect applications on the determination of sunset yellow in diverse real samples.
