Chinese Journal of Catalysis ›› 2016, Vol. 37 ›› Issue (11): 1975-1981.DOI: 10.1016/S1872-2067(16)62519-6

• Article • Previous Articles     Next Articles

Effect of electron acceptors H2O2 and O2 on the generated reactive oxygen species 1O2 and OH· in TiO2-catalyzed photocatalytic oxidation of glycerol

Trin Jedsukontorna, Vissanu Meeyoob, Nagahiro Saitoc, Mali Hunsoma,d   

  1. a Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;
    b Centre for Advanced Materials and Environmental Research, Mahanakorn University of Technology, Bangkok 10530, Thailand;
    c Graduate School of Engineering & Green Mobility Collaborative Research Center, Nagoya University, Nagoya, Japan;
    d Center of Excellence on Petrochemical and Materials Technology (PETRO-MAT), Chulalongkorn University, Bangkok 10330, Thailand
  • Received:2016-06-01 Revised:2016-07-18 Online:2016-11-25 Published:2016-11-25
  • Contact: Mali Hunsom,Tel:+66(2)2187523-5; Fax:+66(2)2555831; E-mail:mali.h@chula.ac.th

Abstract:

The effect of the electron acceptors H2O2 and O2 on the type of generated reactive oxygen species (ROS), and glycerol conversion and product distribution in the TiO2-catalyzed photocatalytic oxida-tion of glycerol was studied at ambient conditions. In the absence of an electron acceptor, only HO· radicals were generated by irradiated UV light and TiO2. However, in the presence of the two elec-tron acceptors, both HO· radical and 1O2 were produced by irradiated UV light and TiO2 in different concentrations that depended on the concentration of the electron acceptor. The use of H2O2 as an electron acceptor enhanced glycerol conversion more than O2. The type of generated value-added compounds depended on the concentration of the generated ROS.

Key words: Glycerol oxidation, Titanium dioxide, Photocatalyst, Electron acceptor