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non-Enzymatic Electrochemical sensing of Bisphenol A in Drinking Water and Milk Using Bimetallic nickel-Copper Metal–Organic Framework

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Journal of Analysis and Testing 2024年第4期8卷 451-465页

作者： Baban Dey Md.Wasi Ahmad Refat Al-shannaq Jehan Y.Al-Humaidi s.k.safdar hossain.chan.ra n.patra raed H.Althomali Mohammed M.rahman Arup Choudhury Department of Chemical Engineering Birla Institute of Technology Department of Chemical Engineering College of EngineeringDhofar University Department of Chemistry College of SciencePrincess Nourah Bint Abdulrahman University Department of Chemical Engineering College of EngineeringKing Faisal University Analytical Chemistry Division Chemistry GroupBhabha Atomic Research Centre Homi Bhabha national Institute Department of Chemistry College of Art and SciencePrince Sattam Bin Abdulaziz University Center of Excellence for Advanced Materials Research (CEAMR) & Department of ChemistryFaculty of ScienceKing Abdulaziz University

In recent years, there have been concerns about the toxicity of bisphenol A(BPA) in food packaging materials due to the potential endocrine disrupting effects it may have on humans, especially children and infants. In this present investigation, a free-standing nickel-copper pyridine-2,6-dicarboxylic acid(PDA) metal organic framework(MOF) anchored carbon nanofiber paper(ni-Cu(PDA)MOF/CnF) was synthesized for the sensing and quantify the BPA analytes in milk and water. As-prepared bimetallic MOF hybrid materials are extremely porous, hydrophilic in nature with a huge surface area. This allows for the easy pathway of analyte molecules, which react with the redox-active metal sites of MOF matrix and enhance the sensitivity. During electrocatalysis reaction, various functional groups present in the MOF system can also act as dynamic adsorption sites. In the neutral medium(pH = 7.0), the ni-Cu(PDA)MOF/CnF modified glassy carbon electrode(ni-Cu(PDA)MOF/CnF/GCE) ascertained good catalytic activity and strong electrochemical sensitivity toward BPA with higher sensitivity value and lower limit of detection(LOD) value. The irreversible and diffusion-controlled oxidation reactions of BPA were observed. The bimetallic MOF modified electrode displayed an extensive linear ranging from 1 to 150 μmol/L with a LOD of 75 n mol/L for BPA detection. The MOF anchored electrode displayed exceptional anti-interference property, reproducibility and good storage stability up to one month. It is notable that the ni-Cu(PDA)MOF/CnF/GCE has proved the competence of detecting BPA in milk and drinking water samples, which displayed satisfactory outcomes with chromatographic analysis.

关键词： Bisphenol A Carbon nanofiber Electrochemical sensor Limit of detection nickel-copper MOF

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nuclear structure and decay modes of ra isotopes within an axially deformed relativistic mean field model

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Chinese Physics C 2018年第8期42卷 121-129页

作者： rashmirekha swain s.k.patra B.B.sahu school of Applied sciences KIIT Deemed to be UniversityBhubaneswar-751024OdishaIndia Institute of Physics Bhubaneswar-751005India

We examine the structural properties and half-life decay of ra isotopes within the axially deformed Relativistic Mean-Field（RMF）theory with nL3 force *** work out the binding energy（BE）,RMs radii,two-neutron separation energies（s（2n））,and some other *** results are in good agreement with the finite-range droplet model（FRDM）and experimental *** the possibility of neutron magic number,theα-decay and cluster decay half-lives of ra isotopes are calculated systematically using the Q-values obtained from the RMF *** decay half-life calculations are carried out by taking three different empirical *** calculated decay half-lives are found to be highly sensitive to the choice of *** shell or sub-shell closures are found at daughter nuclei with n=128 and n=126 when alpha and 8Be,12C,18O respectively are emitted from ra *** the cluster radioactivity is affected by the shell closure of parent and daughter,a long half-life indicates the stability of the parent,and a small parent half-life indicates that the shell stability of the daughter against decay.

关键词： relativistic mean field nuclear bulk properties alpha and cluster decay half-life

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