Volume No. 7 Issue No.: 1 Page No.: 45-50 July-September, 2012

 

PHOTO CATALYTIC OXIDATION ACTIVITY OF CARBON SUPPORTED NANO TiO2- LDPE FILM

 

Suwannahong Kowit1,2*, Liengcharernsit Winai1, Sanongraj Wipada3 Phompan Waranya4, Kruenate Jittiporn

1. Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok (THAILAND)
2. Faculty of Science and Technology, Suan Sunandha Rajabhat Univesity,1 U-Thong Nok Road,Wachira, Dusit, Bangkok (THAILAND)
3. Department of Chemical Engineering, Faculty of Engineering, Ubon Ratchathani University, Ubonratchathani (THAILAND)
4. National Metal and Materials Technology Center, Bangkok (THAILAND)

 

Received on : July 05,2012

 

ABSTRACT

 

This research was carried out by using activated carbon as a support material of nano TiO2 photocatalyst. The preparation of carbon-supported nano TiO2-LDPE film (TiO2-AC/LDPE) was achieved by cast film extrusion process. The characterization of films were done by UV-Vis spectroscopy, Scanning Electron Microscopy (SEM) and BET surface area analysis. The photo catalytic oxidation activity of film was examined using an annular closed system reactor equipped with a UV C lamp as energy source. Dichloromethane (DCM) in gas phase was introduced for photo catalytic oxidation activity tests. The result from SEM reveals the fine dispersion of carbon-supported nano TiO2 on the film surface with using 3 and 5%wt activated carbon while 10%wt activated carbon shows the agglomeration on the film. The calculation of energy band gap of carbon-supported with nano TiO2-LDPE film were 2.75 eV, 2.65 eV and 2.66 eV, respectively with varying the quantity of activated carbon support at 3, 5 and 10 % (wt.cat/wt. film). The photocatalytic degradation test show the DCM removal efficiencies of 62%, 55% and 40% with using 3, 5 and 10 % (wt.cat/wt. film) activated carbon support at 200 minutes treatment period.

 

Keywords : Photo catalytic Oxidation, Activated carbon support, Dichloromethane, TiO2, Scanning Electron Microscopy (SEM)

 

 

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