Browsing by Author "Muhammad Danish"

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    Development of Efficient Electrolyte for Semiconductor Ionic Membrane Fuel Cell
    (Library Information Services, COMSATS University Islamabad, Lahore Campus, 2024) Muhammad Danish; CIIT/SP23-RPH-006/LHR; Prof. Dr. M Ashfaq Ahmad; LHR TP 9627
    In this study, electrolyte was fabricated for semiconductor ionic membrane fuel cells. Barium and Bismuth doping with ceria electrolyte for semiconductor ionic membrane fuel cell was prepared successfully. All of these samples were prepared by co- precipitation method. These synthesized electrolyte materials give better results and beneficial for more oxygen ions vacancies which oxidation reduction reaction enhanced. The synthesized material characterized by using FTIR Spectroscopy, Raman Spectroscopy, UV-Vis spectroscopy, X-ray diffraction and Electrochemical Impedance Spectroscopy. Raman spectra show vibration modes and the structure of materials particles. Raman analysis of samples was done from 700- 900 °C. These results showed the strong peak of cerium oxide in range of 450 to 470nm and the weak intense peak representing oxygen ion vacancies. It indicates the kind of shifting that is taking place in the prepared material. Blue shifting and a decreasing wavelength are seen in all produced materials, indicating a decrease in particle size. In UV-Vis spectroscopy result demonstrated the band gap values which ranges from 3.28 eV for BaCeO2, 3.39 eV for BiCeO2, and 3.3 eV for co doped BaBiCeO2. With the help of XRD compositions and structure was confirmed, which is found to be cubic. EIS tells about the ionic and electronic behavior of materials. The maximum OCV of 888V for BaCeO, 550V for BiCeO and 732V for BaBiCeO at 550°C. The maximum current density of 309mA/cm2 for BaCeO, 202mA/cm2 for BiCeO and 123mA/cm2 for BaBiCeO at 550°C. The maximum power density of 93.3mW/cm2 for BaCeO, 33.27mW/cm2 for BiCeO and 31.6mW/cm2 for BaBiCeO at 550°C.
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    Online Testing system
    (Library Information Services, COMSATS University Islamabad, Lahore Campus., 2020-11-20) Muhammad Danish; SP16-BCS-196; Momina Shaheen; LHR TP 6213
    We can develop the online examination system. In the online examination system candidate get their user ID and password with his/her ID. The ID information is already saved in the examination server. When the candidate login to the server he/she get his/her profile which is already registered. On the specific time candidate receive the message to start the examination. All the answers given by the candidate are saved into the server with his/her profile information. This system also allows to correct the answers if the candidate wants to change the answer during the examination time. After the examination time changes will not be allowed. This is a more accurate way then conducting it manually. We can conduct many types of tests like entry test, skill test, IQ test, Subject test and job test with the help of this system.