|Title:||Novel approaches for visible-light-induced photocatalysts : development, synthesis, characterization, and activities|
|Subject:||Hong Kong Polytechnic University -- Dissertations|
Water -- Purification -- Photocatalysis
|Department:||Department of Civil and Structural Engineering|
|Pages:||67 leaves : ill. (chiefly col.) ; 30 cm.|
|Abstract:||In view of increasingly serious energy and environmental problems, applications of environmentally harmonious photocatalysts are urgently desired for the purification of polluted water, the decomposition of offensive atmospheric odors as well as toxins, and the decomposition of NOₓ and chlorofluorocarbons on a huge global scale. Of the materials being developed for photocatalytic applications, titanium dioxide (TiO₂) remains the most promising because of its relatively high reactivity, low-toxicity and chemical stability. Although TiO₂ has proven to be the most excellent photocatalyst for the oxidative decomposition of many compounds, its relatively wide band gap (Eg ~3.2 eV, excited only by UV light) limits its further application in the visible light region (400 nm <λ< 750 nm), which accounts for 43% of the incoming solar energy. Secondly, a low rate of electron transfer to oxygen and a high rate of recombination on pure TiO₂ surface between excited electron-hole pairs result in a low quantum yield rate and also a limited photo-oxidation rate. Thus, it is appealing to develop high efficient visible light photocatalysts active enough for practical application. This report will be included two set of new catalysts, TiO₂-graphene composites and TiO₂-SiO₂ composites, which are responsive under solar light and visible light.|
Files in This Item:
|b2360444x.pdf||For All Users (off-campus access for PolyU Staff & Students only)||9.68 MB||Adobe PDF||View/Open|
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item: