The mainly research is by adding the rare-earth metal gadolinium salts with sol-gel process to form the gadolinium -doped titanium dioxide, and by forming the liquid crystal template with the non-ionic surfactant to form the mesostructure of titanium dioxide. And the research has aimed at the using different non-ionic surfactant, the different pH value, the different solvent of water/ethanol ratio, the hydrothermal process or not, and the gadolinium content. We discussed these factors how to affect the titanium dioxide in the physical property, the chemical property, or structure influence. Using the XRD to measure the mesostucture of titanium dioxide and the crystallization of titanium dioxide, and we observe the shape and particle size of titanium dioxide with SEM. We use UV-visible spectrum to observe absorption spectrum of titanium dioxide.
The result discovers that surfactant effect is using triblock copolymer, poly (ethylene oxide) - poly (propylene oxide) - poly (ethylene oxide), the titanium dioxide has anatase and rutile crystallization, and particle aggregation. The pH affects the partic le size and the shape. In pH is 5.8, the titanium dioxide has anatase and rutile crystallization. In water/ethanol ratio effect, we use solvent including ethanol, the titanium dioxide has anatase and rutile. Through hydrothermal process, titanium dioxide has little brookite crystallization and the few fibrous titanium dioxides. The doping gadolinium effect is the anatase is reducing with gadolinium content increasing, and from the UV-visible spectrum, the doping gadolinium titanium dioxide has the red shift.
The titanium dioxide using polyoxyethylene sorbitan monostearate and doping gadolinium has the anatase, and absorbs a longer wavelength, and when the doping content is 1% titanium dioxide has a better absorption.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0911106-163848 |
| Date | 11 September 2006 |
| Creators | Lee, I-han |
| Contributors | Hong-yang Lu, Tzu-chien Hsu, Bing-Hwai Hwang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0911106-163848 |
| Rights | campus_withheld, Copyright information available at source archive |
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