M.Phil / MS
Permanent URI for this collectionhttps://repository.cuilahore.edu.pk/handle/123456789/30
This collection archives the complete set of theses produced by students of the COMSATS University Islamabad, Lahore Campus.
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Item Synthesis and Characterization of PANI@cellulose Nanocomposite based Electrochemical Sensor for Environmental Remediation(Library Information Services COMSATS University Islamabad Lahore Campus, 2021-02-26) Nageen Shoukat; SP20-R06-010; Dr. Lubna Sherin; LHR TP 7564In this work, porous CuO-NiO/CA/PANI@Ni-foam sensor electrode has been designed using electospinning of CA/PANI composite on Ni-foam and then drop casting of CuO-NiO nanoparticles for detection of bisphenol A (BPA). 3D nickel foam has been chosen as electrode substrate for the direct growth of CA/PANI since Ni-foam has the advantages of excellent electrical conductivity, low cost, commercial availability, and porous structure, which provides large surface area for synthesis of nanofibers. This direct grown structure of CuO-NiO/CA/PANI@Ni-foam provides exceptional properties, such as reduced resistance, good electron transport, better adhesion stability and the excellent electrical conductivity as compared with non-direct synthesized electrode. Furthermore, a synergetic effect between CuO-NiO/CA/PANI and Ni-foam substrate enables the electrode for excellent sensing behavior towards BPA. The resultant CuO-NiO/CA/PANI@Ni-foam was analyzed using Fourier transform infrared spectroscopy, X-ray diffraction, Raman spectroscopy and scanning electron microscopy. Different electrochemical methods such as cyclic voltammetry, electrochemical impedance and differential pulse voltammetry were used for evaluation of synthesized sensor’s performance against BPA. Under optimal conditions, a linear response was observed against BPA and very low limit of detection as well (LOD=0.6uM). The CuO-NiO/CA/PANI@Ni-foam electrode demonstrated high reproducibility, consistency, and stability when used to detect BPA in water. The synthesized sensor's results demonstrated that it was extremely selective for the detection of BPA, suggesting that it could be useful in environmental based surveillances.Item Synthesis and Characterization of Metal Oxide Decorated Nanocomposite for Photocatalytic Application(Library Information Services COMSATS University Islamabad Lahore Campus, 2020-02-23) Rida Fatima Hussain; SP19-R06-017; Dr. Lubna Sherin; LHR TP 6520Dyes present in industrial wastewater are harmful to humans as well as environment. They are non-biodegradable synthetic materials that are difficult to degrade naturally. At present the simplest, economical and ecofriendly method for dye degradation is application of metal oxides nanocomposite as photocatalyst. Fabrication of metal oxide nanocomposites by using safe and cheap natural products for photocatalytic degradation of dyes is highly interesting field in material sciences. This research focuses on synthesis of four different kinds of nanocomposite CoO/Agcl/FeO, CoO/Agcl/NiO, CoO/Agcl/CuO, CoO/Agcl/ZnO which further processed with sodium alginate and form nanocomposite beads. The synthesized nanocomposites beads were characterized by FTIR. Futhure more, synthesized nanocomposite beads were employed as photocatalyst for the degradation of model dye methyl orange . The degradation of model dye was recorded high for Iron/alginate nanocomposite beads(90% in 80 mins) as compared to other nanocomposite beads