Fabrication of TiO2 nanotubes for chemical Sensing
Other Title(s)
تصنيع متحسس كيميائي باستخدام أنابيب التيتانيوم النانوية
Dissertant
Thesis advisor
Comitee Members
Natiq, Naji Usamah
Jafar, Harith Ibrahim
Najm, Tariq S.
University
University of Baghdad
Faculty
College of Science
Department
Department of Physics
University Country
Iraq
Degree
Master
Degree Date
2014
English Abstract
TiO2 nanotubes fabricated through anodization of Ti foils in (NH4F 0.5 wt%) & (ethylene glycol 95.5wt%) with (4wt % di ionized water) The effect of voltage variation on the tube diameter, tube length, tube wall thickness and cell diameter for (1) hr, in room temperature was investigated in this thesis.
The anodization potential was varied from (10, 20, 30, 40, 50, 60, 70 and 80)V with fixed parameters like concentration NH4F, time and temperature was achieved in the preparation of nanotubes.
Optimum morphologies were observed for nanotubes prepared in (50, 80)V At 50V, the length and diameter of tubes approximate 3019 nm & 79 nm respectively, while at 80V the length and diameter of tubes approximate 8210 nm & 46 nm respectively.
Electro deposition of silver ions onto TiO2 NT was obtained by mixing silver nitrate (10 Mm) with sulfuric acid (0.1 M) to fabricate Ag-TiO2 nanotube for NO2 gas sensor.
NO2 gas sensor based on TiO2 & Ag- TiO2 nanotubes was fabricated and characterized as a function of temperature (50, 100, 150, 200, 250 and 300) oC .
Resistance variation as a function of temperature for different concentration of NO2 vapor gas (10, 20, 30 and 40) ppm was investigated.Higher resistance was observed for Ag-TiO2 nanotubes prepared for (50)V compared to the resistance of (80)V.
The resistance was increased with the increasing in NO2 concentration for pure TiO2 & Ag-TiO2 nanotubes.
In general the resistance of Ag-TiO2 was higher than pure TNT’S.
The sensor response was studied using sensitivity curve for TNT’S & Ag-TiO2 nanotube .
EDX was used for pure TNT’S & Ag-TiO2 nanotubes to find out the elements composing the produced samples.
Morphological studies of the tube dimensions was obtained using AFM used to measure the average diameter of TiO2 & nanotube and roughnes of the surface & SEM was used to image the topography of TiO2 nanotubes prepared for different voltages.
Main Subjects
No. of Pages
88
Table of Contents
Table of contents.
Abstract.
Abstract in Arabic.
Chapter One : Introduction and literature review.
Chapter Two : Theoretical background.
Chapter Three : Experimental work and techniques.
Chapter Four : Results and discussions.
Chapter Five : Conclusions and proposal for future research.
References.
American Psychological Association (APA)
Mirza, Bahar Ahmad. (2014). Fabrication of TiO2 nanotubes for chemical Sensing. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-607291
Modern Language Association (MLA)
Mirza, Bahar Ahmad. Fabrication of TiO2 nanotubes for chemical Sensing. (Master's theses Theses and Dissertations Master). University of Baghdad. (2014).
https://search.emarefa.net/detail/BIM-607291
American Medical Association (AMA)
Mirza, Bahar Ahmad. (2014). Fabrication of TiO2 nanotubes for chemical Sensing. (Master's theses Theses and Dissertations Master). University of Baghdad, Iraq
https://search.emarefa.net/detail/BIM-607291
Language
English
Data Type
Arab Theses
Record ID
BIM-607291
