| Autor: |
Bhatti MA; Department of Environmental Sciences University of Sindh Jamshoro, 76080, Sindh Pakistan., Shah AA; Nadirshaw Eduljee Dinshaw (NED) University of Engineering and Technology Karachi, 75270, Pakistan., Almaani KF; Department of Environmental Sciences University of Sindh Jamshoro, 76080, Sindh Pakistan., Tahira A; Department of Science and Technology, Campus Norrkoping, Linkoping University, SE-60174 Norrkoping, Sweden., Chandio AD; Nadirshaw Eduljee Dinshaw (NED) University of Engineering and Technology Karachi, 75270, Pakistan., Willander M; Department of Science and Technology, Campus Norrkoping, Linkoping University, SE-60174 Norrkoping, Sweden., Nur O; Department of Science and Technology, Campus Norrkoping, Linkoping University, SE-60174 Norrkoping, Sweden., Mugheri AQ; Dr. M.A Kazi Institute of Chemistry University of Sindh Jamshoro, 76080, Sindh Pakistan., Bhatti AL; Institute of Physics University of Sindh Jamshoro, 76080, Sindh Pakistan., Waryani B; Department of Fresh Water Biology and Fisheries University of Sindh Jamshoro, 76080, Sindh Pakistan., Nafady A; Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia., Ibupoto ZH; Dr. M.A Kazi Institute of Chemistry University of Sindh Jamshoro, 76080, Sindh Pakistan. |
| Abstrakt: |
In this research work, we have produced a composite material consisting titanium dioxide (TiO₂) and zinc oxide (ZnO) nanostructures via precipitation method. Scanning electron microscopy (SEM) study has shown the mixture of nanostructures consisting nanorods and nano flower. Energy dispersive spectroscopy (EDS) study has confirmed the presence of Ti, Zn and O as main elements in the composite. X-ray diffraction (XRD) study has revealed that the successful presence of TiO₂ and ZnO in the composite. The composite material exhibits small optical energy band gap which led to reduction of the charge recombination rate of electron-hole pairs. The band gap for the composite TiO₂/ZnO samples namely 1, 2, 3 and 4 is 3.18, 3.00, 2.97 and 2.83 eV respectively. Small optical bandgap gives less relaxation time for the recombination of electron and hole pairs, thus favorable photodegradation is found. The degradation efficiency for the TiO₂/ZnO samples for methylene blue in order of 55.03%, 75.7%, 85.14% and 90.08% is found for the samples 1, 2, 3 and 4 respectively. The proposed study of titanium dioxide addition into ZnO is facile and inexpensive for the development of efficient photocatalysts. This can be capitalized at large scale for the energy and. |
