Department of Chemistry

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Subject: search.filters.subject.Electrochemical

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    Fabrication of Nanocomposite Based Electrochemical Sensor for Environmental Application
    (Library Information Services COMSATS University Islamabad Lahore Campus, 2021-02-23) Muhammad Mathar Bashir; FA19-R06-020; Dr. Farah Alvi; LHR TP 7315
    With the advancement in industrial world, heavy metal ions are becoming great concern because industrial effluents contain large quantity of heavy metal ions. The increase in concentration of metal ions in water is creating many problems for aquatics life and human beings. Traditionally for detection of heavy metal ions atomic absorption, atomic emission, UV/Visible spectroscopy, inductively coupled plasma mass spectrometryetc are used but they are very sophisticated, expensive and require trained personals to operate. In contrast to that electrochemical techniques are inexpensive, portable and easy to use. The aim of this research was to modify our electrode to increase sensing ability of our electrode. We prepared nanocellulose and PANI based metal nanocomposites and fabricated our glassy carbon electrode by drop casting method. Cyclic voltammerty and electronic impedance spectroscopy were used for heavy metal ion sensing. Acid hydrolysis was used to prepare nanocellulose. Characterization techniques used to confirm our synthesis of composite were FTIR and XRD.
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    MOF Based Electrochemical Sensor for the Detection of Antimicrobial Drug Residues in Food Stuff
    (Library Information Services COMSATS University Islamabad Lahore Campus, 2021-02-23) HAFIZA KHADIJA ASLAM; FA19-R06-013; Dr. Mustansara Yaqub; LHR TP 7313
    With the increasing unregulated use and toxicity of antimicrobials to public health and increase in bacterial resistance, it has become a major challenge to design a sensitive, rapid and cost effective technique to detect antimicrobials in food stuff. This research work describes the electrochemical detection of Metronidazole (MTZ) drug residues by using Silver Carbon dots embedded Cu-Gallic acid nanocomposite, coated at GCE (Ag/CDs@CuGA MOF/GCE). Pomegranate peels were used as a green and cost effective source to produce Carbon dots (CDs) and an aqueous oven assisted –solvothermal technique was chosen to fabricate the nanocomposite. Moreover, its crystal, elemental structure and morphological aspects were studied. The electrochemical properties of synthesized nanocomposite were analyzed to examine the nanocomposites sensitivity towards electro-catalytic determination of Metronidazole (MTZ). It was concluded that Silver Carbon dots embedded Cu-Gallic acid nanocomposite, coated at GCE (Ag/CDs@CuGA MOF/GCE) exhibits tremendous electro-catalytic properties toward Metronidazole (MTZ) reduction. A rapid, sensitive, reproducible and cost effective electrochemical sensor was developed which enables to sense the concentrations of drug at lower levels. The fabricated sensor had also shown good results even in real sample analysis (tetra pack milk and fresh milk).
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    Synthesis and Characterization of Functionalized Nano-cellulose Based Conducting Material
    (Library Information Services COMSATS University Islamabad Lahore Campus, 2020-02-20) Noman Zafar; SP19-R06-006; Dr. Lubna Sherin; LHR TP 6510
    Electrochemical sensing techniques are the advance techniques for the detection of water contamination. Conducting materials in electro-chemical sensors are based on graphene or carbon nano tubes (CNT) substrate mostly. Resent literature has documented the hazardous effects of graphene and carbon nanotubes (CNT). Moreover, use of these substrates enhances the cost of the sensor to a larger extend. Currently environment friendly and sustainable natural materials are replacing the toxic materials for the development of electro-chemical sensors. In this view current research work aims at the synthesis of conducting composite by incorporating eco-friendly and abundantly available natural material i.e. cellulose as a substrate. Initially nano-cellulose was synthesized and subsequently it was functionalized with polyaniline and nano metal oxides to enhance the conductivity. The synthesized nanocomposite was characterized through FTIR analysis. Conductance of the synthesized materials was checked and IV graphs were plotted. The results showed that conductance of nano composite was increased subsequently by the addition of different metals to NC/PANI composite.