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Tuning the optical energy band gap of sol-gel-based titanium dioxide nanocomposite particles incorporated with ITO, fullerene, and SWCNT
Mohammed, Azhar Hussain
Mohammed, Azhar Hussain
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2016-12
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Fossil fuel,Water splitting,Doping,Semiconductor
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Electronic dissertations
Electronic dissertations
Electronic dissertations
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Abstract
Hydrogen energy is an alternative source of energy apart from the fossil fuel sources being
utilized at present. With the depleting energy from fossil fuels and very low reserves, hydrogen
energy can be an excellent fuel for future generations to come. Water splitting is a technique by
which hydrogen (H2) can be separated from the water (H2O) molecule, and this hydrogen can then
be transferred to fuel cells as energy. The water-splitting theory is depicted when the water
molecule is exposed to sunlight under the action of a photocatalyst. The photon energy is not
entirely utilized to split the water molecule, which is mainly due to the large energy band gap of
semiconductor materials.
The photoactivity of semiconductor material is increased by tuning down the energy band
gap. In this research, the energy band gap of titanium dioxide (TiO2) as a semiconductor was tuned
down by doping TiO2 nanoparticles with indium tin oxide (ITO), fullerene (C60), and a singlewalled
carbon nanotube (SWCNT) separately. The TiO2 nanoparticles were synthesized by a solgel
technique using titanium isopropoxide (C12H28O4Ti), 2-propanol anhydrous (C3H7O), and
hydrochloric acid (HCl). This research might well open new opportunities and possibilities for
synthesizing a semiconductor-based photocatalyst for photoelectrochemical (PEC) solar water
splitting.
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Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Mechanical Engineering
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Wichita State University
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Copyright 2016.by Azhar Hussain Mohammed