Department of Chemistry

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Author: search.filters.author.Dr. Abdur RahimSubject: search.filters.subject.FA18

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    Carbon Nanotubes and their Composites for Electrochemical Detection of Glucose
    (Library Information Services COMSATS University Islamabad Lahore Campus, 2020-02-19) Muhammad Umar Shakeel; FA18-R06-010; Dr. Abdur Rahim; LHR TP 6492
    Glucose plays a significant role in human body for energy generation and brain functioning. Human blood glucose level is a universal mark of an individual’s health particularly for the ones threatened with diabetes. Amid the rising number of affectees, various materials are being tested for incorporation in glucose sensing. An efficient and cost effective simple one step hydrothermal procedure for synthesis of cobalt selenide (CoSe) decorated carbon nanotubes using powdered selenium and hydrazine is reported with a feasible application of this advanced composite material as a novel binder free electrocatalytic material for glucose sensing and detection. A glassy carbon electrode deposited with the CoSe@CNTs shows eloquent excellence in application of glucose sensing exhibiting a lower limit of detection of 1.25 mM and an exceptionally high maximum current density of 6.8 ± 0.03 mA cm-2 in basic medium. Bulk electrochemical measurements performed with CoSe@CNTs loaded glassy carbon electrode also confirmed the oxidation of glucose in alkaline media
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    Non-Enzymatic Electrochemical Sensing of Dopamine based on Transition Metal Oxides/CNTs
    (Library Information Services COMSATS University Islamabad Lahore Campus, 2020-02-17) Shamim Ramzan; FA18-R06-009; Dr. Abdur Rahim; LHR TP 5963
    Sensing with the aid of metal oxides and CNTs is the most vibrant field of electrochemical science, which endows an ambit for various innovative and novel functions with a variety of applications. Enzymatic sensors are costly, lack of stability, have difficult immobilization techniques as well as electrodes used for electrochemical analysis of neurotransmitter concentrations are also unable to monitor the potential of these species. Besides, sensors with the most robust and reliable electrodes generally tend to deteriorate over months of use. Therefore, a study has been designed to synthesize CNTs based metal oxides nanoparticles by green synthesis method using the lignin as a modifier and reducing agent. The synthesize materials have been characterized by different techniques, i.e. SEM, XRD, and FTIR for surface morphology, determination of nanostructure, and functionalization of surface. The synthesized materials such as C2O3@CNTs/lignin, and CuO@CNTs/lignin have been used for the surface modification of glassy carbon electrode (GCE). These composites are supposed to be used as a promising material for dopamine sensing by giving excellent electrochemical properties.