Department of Chemistry
Permanent URI for this communityhttps://repository.cuilahore.edu.pk/handle/123456789/14
Browse
2 results
Search Results
Item Synthesis and Characterization MOF/COF Hybrid for Photocatalytic Application(Library Information Services COMSATS University Islamabad Lahore Campus, 2021-02-26) Maham Miran; SP20-R06-003; Dr. Muhammad Shahid Nazir; LHR TP 7742Photo responsive crystalline porous hybrid materials are the absolute need due to exceptional characteristics such as high chemical stability, crystalline nature, high flexibility and tunable porosity in their structure. UiO66 (NH2) and COF-LZU1 individually show good photocatalytic activity but their hybrid has not been synthesized and reported for photo catalytic application. In this work, a novel nanohybrid is synthesized at room temperature by the condensation of amino-functionalized UiO66 and COF-LZU1. MOF@COF hybrid is characterized by FTIR and XRD and results showed good agreement with already reported data. FTIR peaks at 3330cm-1, 1651cm-1, and 648cm-1 are major peaks in the FTIR graph of UiO66(NH2)@COF-LZU1 corresponding to N-H stretching due to the presence of NH2-BDC, imine bond due to the presence of COF-LZU1 and O-Zr-O metal peaks. XRD characteristic peaks at 7.3°, 8.5°, and 4.2° confirms presence of amino-functionalized UiO66 and COF-LZU1. The hybrid material is explored for the removal of methyl orange. Dye degradation efficiency is carried out at different concentrations (0.01g, 0.03g, 0.06g) of hybrid material at room temperature and pH 2. Degradation rate is high in acidic media as compared to basic conditions. The highest performance is observed at 0.06g of photo-catalyst that is 80%.Item Synthesis of Ag and Cu Nanowires and Deposition of Nanowires Thin Films on to Various Substrates(Library Information Services COMSATS University Islamabad Lahore Campus, 2021-02-26) Saba Qamar; SP19-R06-026; Dr. Muhammad Shahid Nazir; LHR TP 7553Silver and copper nanowires have novel applications because of their unique geometry and physical properties including electrical, optical, thermal and mechanical properties. They are one dimensional metallic structure. These wires have capability to flow ions or electrons in specific directions which is a beneficial characteristic in nanotechnology. Besides efficient performance copper nanowires have limitations including aggregation and oxidation because of their natural characteristics. Silver nanowires also have some limitations for example preservation of morphology in synthesis, feasibility of mass production, environmental stability and thermal stability. In this study, silver and copper nanowires were synthesized through polyol method. FTIR results confirm that Ethylene glycol and Polyvinylpyrrolidone removed in silver and copper nanowires. Liquid conductivity test conforms the conductivity of these materials. The conductivity of silver nanowires reported 716μs/cm and copper nanowires was 387μs/cm. UV visible spectroscopy shows maximum intensity of all silver nanowires are 430nm which matches the adsorption standard of silver, XRD results conform the crystalline structure of both inks and peaks trend matches the standards of silver and copper. and SEM conforms the presence of silver and copper nanowires. Silver nanowires has an average diameter 0.15μm and average length 2.3μm. Copper nanowires has an average diameter 0.07μm and average length 1.1μm, Observed the photocatalytic degradation of silver and copper nanowires using Methylene blue and Congo red dye stock solution respectively. Methylene blue shows 60% degradation and Congo red shows 39% degradation in UV-visible region.