Show simple item record

dc.contributor.advisor Allam, Nageh Hasan, Menna 2018-05-15T12:25:19Z Spring 2018 en_US 2018-05-15
dc.description.abstract It is becoming more urgent every day to find an efficient alternative to fossil fuels. This need motivates the search for a low-cost and stable photocatalysts to split water and generate hydrogen gas as a clean and renewable source of energy. In this thesis, novel TiO2-CuO and TiO2-Cu composite nanofibers were fabricated and tested for solar hydrogen generation. The effect of annealing the nanofibers in different atmospheres on their crystal structure and morphology was investigated and correlated to the photocatalytic activity of the materials using XRD, electron paramagnetic resonance (EPR) techniques, transmission electron microscopy TEM, and Fourier transform infrared FTIR. The optical properties of the fabricated nanofibers were investigated using UV-Vis spectroscopy. The absorption spectra showed that the addition of both CuO or Cu to TiO2 shifts the absorption edge into the visible region of the solar spectrum. The photocatalytic activity and stability of the fabricated nanofibers were tested in a UV-reactor. The metallic copper supported TiO2 nanofibers showed significant enhancement in the amount of hydrogen evolved during the photocatalytic water splitting process. This enhancement can be related to the distinct characteristics of the material including, high surface area and increasing the life time of the photogenerated charge carriers that results in efficient charge separation. The fabricated TiO2-CuO composite nanofibers showed 117% enhancement in the amount of hydrogen evolved during the photocatalytic water splitting process compared to TiO2 nanofibers. On the other hand, TiO2-Cu composite nanofibers showed 344% enhancement compared to that of TiO2 nanofibers. The study showed that Cu is a promising alternative to noble metals as a catalyst in photocatalytic water splitting, with the advantage of being an earth abundant element and a relatively cheap material. en_US
dc.description.sponsorship AlGhurair Scholarship en_US
dc.format.extent 86 p. en_US
dc.format.medium theses en_US
dc.language.iso en en_US
dc.rights Author retains all rights with regard to copyright. en
dc.subject Photocatalytic water splitting en_US
dc.subject semiconductor en_US
dc.subject solar energy en_US
dc.subject nanofibers en_US
dc.subject.lcsh Thesis (M.S.)--American University in Cairo en_US
dc.title Unbiased spontaneous solar fuel production using stable composite nanofiber photocatalysts en_US
dc.type Text en_US
dc.subject.discipline Nanotechnology en_US
dc.rights.access This item is restricted for 2 years from the date issued en_US
dc.contributor.department American University in Cairo. School of Engineering Interdisciplinary Program en_US
dc.embargo.lift 2020-05-14T12:25:19Z
dc.description.irb American University in Cairo Institutional Review Board approval has been obtained for this item. en_US
dc.contributor.committeeMember El-Sheikh, Salah
dc.contributor.committeeMember El-Mahallawi, Eman
dc.contributor.committeeMember Awad, Adel

Files in this item


This item appears in the following Collection(s)

  • Theses and Dissertations [1787]
    This collection includes theses and dissertations authored by American University in Cairo graduate students.

Show simple item record