Synthesis of TiO2 nano-particles and their photocatalytic activity for formaldehyde and methyl orange degradation

2007年第1卷第2期

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《化学科学与工程前沿（英文）》 >> 2007年第1卷第2期 doi: 10.1007/s11705-007-0033-5

Synthesis of TiO2 nano-particles and their photocatalytic activity for formaldehyde and methyl orange degradation

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;

发布日期： 2007-06-05

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摘要

TiO 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 TiO preparation was obtained. Results showed that particle sizes were in the range of 10 40 nm, and that prepared TiO 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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prepared ; photocatalytic activity ; apparent ; photocatalytic ; orthogonal