Sponge porous CoFe2O4/Nafion modified electrode for detection of heavy metal ions
XU Yu-ting1, CHU Xu1, CAO Yan1,2
1. College of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China; 2. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
Abstract: Porous sponge-like CoFe2O4 spinel crystals are prepared by the sol-gel method,and casted by dropping on a glassy carbon electrode (GCE) to make a modified electrode,on which Nafion is dropped in succeed to form CoFe2O4/Nafion/GCE electrode.Results show that under the optimized conditions,the linear range of Pb(Ⅱ) by CoFe2O4/Nafion/GCE is 0.02-0.10 μmol,with a sensitivity of 68.50 μA/(μmol·L) and a detection limit of 7.3 nmol (calculated by the 3σ method).XPS characterization demonstrates the complexation of active materials in the electrode with heavy metals.Subsequently,the repeatability,interference and actual lake water detection of the prepared electrode are evaluated,and it is verified to have excellent performance and potential practicability.Therefore,CoFe2O4 spinel crystal is a potential new sensor material for heavy metal detection.
徐玉婷, 储旭, 曹晏. 海绵多孔状CoFe2O4/Nafion复合修饰电极检测重金属离子[J]. 现代化工, 2021, 41(6): 232-236.
XU Yu-ting, CHU Xu, CAO Yan. Sponge porous CoFe2O4/Nafion modified electrode for detection of heavy metal ions. Modern Chemical Industry, 2021, 41(6): 232-236.
[1] Sud D,Mahajan G,Kaur M P.Agricultural waste material as potential adsorbent for sequestering heavy metal ions from aqueous solutions-A review[J].Bioresource Technology,2008,99(14):6017-6027. [2] Roje V.A fast method for multi-metal determination in soil samples by high-resolution inductively-coupled plasma-mass spectrometry (HR-ICP-MS)[J].Chemical Speciation & Bioavailability,2015,22(2):135-139. [3] Losev V N,Buyko O V,Trofimchuk A K,et al.Silica sequentially modified with polyhexamethylene guanidine and Arsenazo I for preconcentration and ICP-OES determination of metals in natural waters[J].Microchemical Journal,2015,123:84-89. [4] Dasbasi T,Sacmaci S,Ulgen A,et al.A solid phase extraction procedure for the determination of Cd(Ⅱ) and Pb(Ⅱ) ions in food and water samples by flame atomic absorption spectrometry[J].Food Chemistry,2015,174:591-596. [5] Sitkoo R,Janik P,Zawisza B,et al.Green approach for ultratrace determination of divalent metal ions and arsenic species using total-reflection X-ray fluorescence spectrometry and mercapto-modified graphene oxide nanosheets as a novel adsorbent[J].Analytical Chemistry,2015,87(6):3535-3542. [6] Bansod B,Kumar T,Thakur R,et al.A review on various electrochemical techniques for heavy metal ions detection with different sensing platforms[J].Biosensors & Bioelectronics,2017,94:443-455. [7] Cui L,Wu J,Ju H.Electrochemical sensing of heavy metal ions with inorganic,organic and bio-materials[J].Biosensors & Bioelectronics,2015,63:276-286. [8] Lu Y,Liang X,Niyungeko C,et al.A review of the identification and detection of heavy metal ions in the environment by voltammetry[J].Talanta,2018,178:324-338. [9] Liu Z G,Chen X,Liu J H,et al.Well-arranged porous Co3O4 microsheets for electrochemistry of Pb(Ⅱ) revealed by stripping voltammetry[J].Electrochemistry Communications,2013,30:59-62. [10] Zeng Y,Yu M,Meng Y,et al.Iron-based supercapacitor electrodes:Advances and challenges[J].Advanced Energy Materials,2016,6(24):1601053. [11] Li F,Liu J J,David G,et al.Stoichiometric synthesis of pure MFe2O4(M=Mg,Co,and Ni) spinel ferrites from tailored layered double hydroxide (hydrotalcite-like) precursors[J].Chemistry of Materials,2004,16(8):1597-1602. [12] Han X J,Zhou S F,Fan H L,et al.Mesoporous MnFe2O4 nanocrystal clusters for electrochemistry detection of lead by stripping voltammetry[J].Journal of Electroanalytical Chemistry,2015,755:203-209. [13] Reddy D H K,Yun Y S.Spinel ferrite magnetic adsorbents:Alternative future materials for water purification[J].Coordination Chemistry Reviews,2016,315:90-111. [14] Li M,Xiong Y,Liu X,et al.Facile synthesis of electrospun MFe2O4(M=Co,Ni,Cu,Mn) spinel nanofibers with excellent electrocatalytic properties for oxygen evolution and hydrogen peroxide reduction[J].Nanoscale,2015,7(19):8920-8930. [15] Liu S,Dong Z,Xiang D,et al.Crossing-link of experimental reducibility tests,XPS characterizations and DFT estimates on ferrite oxygen carriers in CLC[J].Applied Catalysis B:Environmental,2018,238:647-655. [16] Ji X.Square wave voltammetric determination of trace amounts of europium(Ⅱ) at montmorillonite-modified carbon paste electrodes[J].Collection of Czechoslovak Chemical Communications,2004,69(8):1590-1599. [17] Reddy D H K,Yun Y S.Spinel ferrite magnetic adsorbents:Alternative future materials for water purification?[J].Coordination Chemistry Reviews,2016,315:90-111. [18] Wu K,Hu S,Fei J,et al.Mercury-free simultaneous determination of cadmium and lead at a glassy carbon electrode modified with multi-wall carbon nanotubes[J].Analytica Chimica Acta,2003,489(2):215-221. [19] Zhou H,Hou H,Dai L,et al.Preparation of dendritic bismuth film electrodes and their application for detection of trace Pb(Ⅱ) and Cd(Ⅱ)[J].Chinese Journal of Chemical Engineering,2016,24(3):410-414. [20] Li X,Wen H,Fu Q,et al.Morphology-dependent NiO modified glassy carbon electrode surface for lead(Ⅱ) and cadmium(Ⅱ) detection[J].Applied Surface Science,2016,363:7-12. [21] Liao J,Zhang J,Wang C Z,et al.Electrochemical and density functional theory investigation on the differential behaviors of core-ring structured NiCo2O4 nanoplatelets toward heavy metal ions[J].Analytica Chimica Acta,2018,1022:37-44. [22] Chen P Y,Nien P C,Hu C W,et al.Detection of uric acid based on multi-walled carbon nanotubes polymerized with a layer of molecularly imprinted PMAA[J].Sensors & Actuators B Chemical,2010,146(2):466-471. [23] Zhu L,Tian C,Yang R,et al.Anodic stripping voltammetric determination of lead in tap water at an ordered mesoporous carbon/nafion composite film electrode[J].Electroanalysis,2008,20(5):527-533. [24] Wu K,Hu S,Fei J,et al.Mercury-free simultaneous determination of cadmium and lead at a glassy carbon electrode modified with multi-wall carbon nanotubes[J].Analytica Chimica Acta,2003,489(2):215-221. [25] Zhou H,Hou H,Dai L,et al.Preparation of dendritic bismuth film electrodes and their application for detection of trace Pb(Ⅱ) and Cd(Ⅱ)[J].Chinese Journal of Chemical Engineering,2016,24(3):410-414. [26] Li X,Wen H,Fu Q,et al.Morphology-dependent NiO modified glassy carbon electrode surface for lead(Ⅱ) and cadmium(Ⅱ) detection[J].Applied Surface Science,2016,363:7-12. [27] Liao J,Zhang J,Wang C Z,et al.Electrochemical and density functional theory investigation on the differential behaviors of core-ring structured NiCo2O4 nanoplatelets toward heavy metal ions[J].Analytica Chimica Acta,2018,1022:37-44.