‘TiO 2 ’, GREEN CATALYST: CLEAN ENVIRONMENT. Dr. Romana Khan Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad. 1 st National Conference on Biotechnology & Microbiology. Introduction. Photocatalysis - Need of the day . CO 2 + H 2 O. CO 2.
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
Dr. Romana Khan
Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad
1st National Conference on Biotechnology & Microbiology
Photocatalysis - Need of the day
3.12 eV (380 nm)
The applications of TiO2 is a function of specific physicochemical properties like:
An appropriate synthetic procedure can provide TiO2 with promising efficiency
Synthesis of TiO2 powders
TiO2– efficient photocatalyst under UV light
Yet, need visible-light active photocatalyst for practical purpose
Can be achieved by doping TiO2 with nonmetals, transition metals and dyes
Activity increases by loading a metaloxide
Metal oxide reduces the chance of recombination of electrons & holes produced during photocatalytic reactions
A- Spin Coating Method
Ti(OBu)4 + EtOH
HCl + H2O + EtOH
Stirring (12 h)
Sol (pH 0.8)
Stirring (12 h)
Gel (pH 9.0 )
Drying (1100C, 12 h)
XRD patterns of TiO2 samples; (a) as-dried, and calcined at (b) 350 oC, (c) 400 oC, (d) 500 oC, (e) 600 oC and (f) 800oC.