Browsing by Author "LHR TP 10017"

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    Amino Acid Based MOF: A Promising Green Material for Electrochemical Sensing of Heavy Metal Ions (HMIs)
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2025) Hooria Aslam; CIIT/SP24-R06-008/LHR; Dr. Lubna Sherin; LHR TP 10017
    Heavy metal ion (HMI) contamination in freshwater resources has become a serious environmental and public health concern worldwide. Toxic metals such as lead (Pb) and mercury (Hg) can accumulate in living organisms and pose significant health risks due to their persistence and non-biodegradable nature. Therefore, the development of efficient and sensitive methods for the detection of HMIs in water is essential before its utilization for domestic, agricultural, and industrial purposes. This study presents the synthesis of an amino acid-based Metal–Organic Framework (MOF) as a green and effective material for electrochemical sensing of heavy metal ions. An energy-efficient microwave-assisted synthesis method was employed to prepare a MOF using bismuth and cobalt as central metal ions and L-tyrosine as the organic linker. L-tyrosine, a naturally occurring and biocompatible amino acid, was selected to enhance the environmental sustainability of the synthesized material. Microwave synthesis offers several advantages, including reduced reaction time, lower energy consumption, high product yield, and minimal environmental impact. The synthesized MOF exhibited excellent surface characteristics suitable for sensing applications. The incorporation of the ionic liquid BMIM BF₄ significantly improved the electrical conductivity, increased the availability of adsorption sites for heavy metal ions, and enhanced the sensing performance of the material. The developed electrochemical sensing platform demonstrated a large active surface area, efficient charge transfer capability, enhanced conductivity, and good operational stability. The structural and physicochemical properties of the synthesized composite were characterized using Fourier Transform Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD) techniques. Furthermore, the electrochemical performance of the MOF-based electrode (L-Tyr-BiCo/IL/GCE) was evaluated through cyclic voltammetry and electrochemical impedance spectroscopy. The results indicate that the developed amino acid-based MOF is a promising green material for the sensitive and reliable detection of heavy metal ions in aqueous environments
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    Molybdenum Disulfide-Metal Organic Framework as Electrode Material for Heavy Metal Ions Detection in Aqueous Media
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2025) Fatima Amjad; CIIT/SP24-R06-006/LHR; Dr. Sara Riaz; LHR TP 10017
    Heavy metal ions (HMIs) are highly hazardous environmental pollutants that pose major threats to aquatic ecosystems and human health due to their non-biodegradable nature and strong tendency to accumulate in living organisms. Therefore, it is essential to develop efficient electrode materials for their electrochemical detection in water. For heavy metal ions detection, a hybrid electrode material based on molybdenum disulfide (MoS₂) and an ytterbium-based metal–organic framework (Yb-MOF) was synthesized and characterized. MoS₂@Yb-MOF composite was developed by synthesizing MoS2 nanosheets and combining them with Yb-MOF to synergistically integrate the active edge sites of MoS2 with high surface area and abundant coordination sites of porous framework of the Yb-MOF. A flexible and conductive electrode was fabricated by directly integrating the composite onto a carbon cloth surface. The successful formation of composite material was confirmed through structural and morphological characterization using X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy. Electrochemical studies conducted using cyclic voltammetry and electrochemical impedance spectroscopy confirmed improved charge transfer behavior and enhanced electrochemical activity of the composite electrode relative to the individual components. These results suggested that the MoS₂@Yb-MOF composite is a promising electrode material for electrochemical detection of heavy metal ions in aqueous media.