1 research outputs found
Synergistic Effect of Reactive Oxygen Species in Photothermocatalytic Removal of VOCs from Cooking Oil Fumes over Pt/CeO<sub>2</sub>/TiO<sub>2</sub>
The
volatile organic compounds (VOCs) from cooking oil fumes are
very complex and do harm to humans and the environment. Herein, we
develop the high-efficiency and energy-saving synergistic photothermocatalytic
oxidation approach to eliminate the mixture of heptane and hexanal,
the representative VOCs with high concentrations in cooking oil fumes.
The Pt/CeO2/TiO2 catalyst with nanosized Pt
particles was prepared by the simple hydrothermal and impregnation
methods, and the physicochemical properties of the catalyst were measured
using numerous techniques. The Pt/CeO2/TiO2 catalyst
eliminated the VOC mixture at low light intensity (100 mW cm–2) and low temperature (200 °C). In addition, it showed 25 h
of catalytic stability and water resistance (water concentration up
to 20 vol %) at 140 or 190 °C. It is concluded that O2 picked up the electrons from Pt to generate the •O2– species, which were transformed
to the O22– and O– species
after the rise in temperature. In the presence of water, the •OH species induced by light irradiation on the catalyst
surface and the •OOH species formed via the thermal
reaction were both supplementary oxygen species for VOC oxidation.
The synergistic interaction of photo- and thermocatalysis was generated
by the reactive oxygen species