Hydrothermal Synthesis of ZnO Nanostructures for Gas Sensing
Researcher name: Ali Ehsan Hahsim
Thesis title: Hydrothermal Synthesis of ZnO Nanostructures for Gas Sensing
Supervised By: Assistant Professor Dr. Fouad Tariq Ibrahim
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Abstract
In this work, five types of gaseous sensors were synthesized for the detection of gases Zinc oxide (ZnO) nanostructure were fabricated using Hydrothermal technique by mixing ZnCl2 and NH4OH and placed them inside an autoclave and allowed to gradually raise up the pH reach to 10 . Five samples were synthesis at a fixed time of 2 h and different temperatures of 100, 125, 150°C, while , the other two synthesis at temperature 150 °C for 1 and 3 h. The effect of temperature on the structure of zinc oxide nanostructure was tested by X-ray diffraction (XRD) patterns, which confirm the polycrystalline structure of the zinc oxide samples. A well-defined diffraction peak was observed at around 36° (101) and this main peak indicates that the hexagonal structure of ZnO had high intensity. Field Emission Scanning emission electron microscopy (FE-SEM) discover the surface covered with nanostructure, in which there are different shapes (nanosheets, star shapes, rod, spherical and cubes), in addition to be uniformly distributed over the entire surface and it shows that these structures are in medium diameter (80.01),(60.56),(76.48),(39.9) nm, and (157) nm, respectively.
A master’s thesis is discussed in College of science, University of Baghdad, about the biostratigraphy and depositional environmental of Yamama formation in Faihaa oil field southern Iraq
In the College of science, University of Baghdad, a master’s thesis was discussed, tagged “Biostratigraphy and Depositional Environmental of Yamama Formation in Faihaa Oil Field Southern Iraq” by the research student Maryam Mohammad Taha and presented to the Geology Department under the supervision by Dr. Salam I.
