Effects of External Magnetic Field in Photocatalytic Reactions in Microfluidic Chip Reactors
Hung Ji Huang1*, Yen Han Wang2, Yuan-Fong Chou Chau3, Hai-Pang Chiang4,5, Jeffrey Chi-Sheng Wu2
1Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu, Taiwan
2Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan
3Centre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Brunei
4Institute of Physics, Academia Sinica, Taiwan
5Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung, Taiwan
* Presenter:Hung Ji Huang, email:hjhuang@narlabs.org.tw
The external magnetic field are applied to enhance the photocatalytic degradation of methyl orange in the micro optical fluidic chip reactors. The ions (OH-) and light induced hot charge carriers are forced to move by magnetic field. Small magnetic field of several hundred oe presented affective enhancement on photocatalytic processing efficiency. The high mass transfer rate and low hot charges recombination result in enhanced processing efficiency. Addition of scavenger, ethanol alcohol, eliminates the induced hot holes in titanium dioxide nanoparticles under 254 nm light illumination. The effects of magnet field on difference between the hot hole and hot electron reaction path are presented in the experimental results.

Keywords: photocatalytic reaction, micro optical fluidic chip reactor, magnetic field, titanium dioxide