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Synthesis of TiO2 nano-particles and their photocatalytic activity for formaldehyde and methyl orange degradation |
| XIAO Xinyan1, ZHANG Huiping1, CHEN Huanqin1, LIAO Dongliang2 |
| 1.College of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, China; 2.College of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640, China; Department of Chemical Engineering, Lakehead University, Thunder Bay, Ontario, P7B 5E1, Canada; |
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Abstract TiO2 nano-particles were synthesized by sol-gel technique and characterized by X-ray diffractometer (XRD) and transmission electron microscope (TEM). Their photocatalytic activities for formaldehyde (FA) and methyl orange (MO) degradation were tested using degradation rate (η) as an evaluation index. Based on the orthogonal test results, the optimal condition for TiO2 preparation was obtained. Results showed that particle sizes were in the range of 10 40 nm, and that prepared TiO2 had better photocatalytic activity than P25. A simplified model was developed to evaluate the apparent quantum efficiency (Φapp) of this photocatalytic reaction system.
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Issue Date: 05 June 2007
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