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.
Browse
2 results
Search Results
Item 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 10017Heavy 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.Item Facile Synthesis of MOF for Enhanced Photo- fenton Degradation of Pesticide from Model Wastewater(Library Information Services, COMSATS University Islamabad, Lahore Campus, 2025) Amir Mushtaq; CIIT/SP24-R06-001/LHR; Dr. M. Shahid Nazir; LHR TP 10013Metal organic frameworks (MOFs) have proved to be a porous material of high surface area, adjustable chemical properties, whereas spinel ferrite nanoparticles have distinct magnetic and electronic properties and their composites are of great interest to the environment. In this research, a useful and efficient photocatalytic compound, MOF-5 and Zn0.5Mn0.5Fe2O4, was effectively prepared by attaching the Zn0.5Mn0.5Fe2O4 nanoparticles onto the MOF-5 structure. X-ray Diffraction (XRD) analysis revealed the existence of typical diffraction peaks of the two MOF-5 and Zn0.5Mn0.5Fe2O4, which show that the composite was formed without phase segregating and the crystalline structure of MOF-5 remained intact. Fourier Transform Infrared Spectroscopy (FTIR) showed several peaks of the metal-oxygen and metal-metal-oxygen stretching vibrations of Zn0.5Mn0.5Fe2O4 and the vibrations of the MOF-5 organic linkers indicating that the nanoparticles were highly interacting with the MOF framework. The distribution of Zn0.5Mn0.5Fe2O4 nanoparticles in porous MOF-5 was shown based on the Scanning Electronic Microscopy (SEM) images, which indicated a uniform distribution in the interconnected microstructure of the material, resulting in high surface area and easy accessibility of the active site. The composite was studied by UV- Visible spectroscopy, revealing specific absorption peaks within the range of 200-800 nm, with minor variations to pure MOF-5, and bandgap was calculated to be 1.87 eV, which has better light-harvesting properties and the possibility of visible-light driven photocatalysis. Under optimal conditions identified with the analysis of the Design Expert, the degradation of imidacloprid in model wastewater was performed under following conditions: reaction pH 4, a constant dosage of 10 mg catalyst, 112.5 μL hydrogen peroxide, and 40 ppm imidacloprid in 10 min reaction time, and the maximum degradation efficiency reached 97.95%, this highlights composite’s efficiency and applicability in environmental remediation.