Abstract
Graphene/titania multiplex photo-catalyst was prepared through hydrothermal method. Methylene blue with initial concentration of 20 mg/L in aqueous solution was treated by photocatalytic oxidation and the degradation process was investigated by UV/Vis spectrum, FTIR and GC-MS Spectra analysis. The results indicated that the conjugate structure of N-S heterocyclic compound was broken and aromatic ring was oxidized to open the ring. The methylene blue molecules were finally mineralized to H2O and CO2 in the photocatalytic degradation process.
Highlights
Dye wastewater is hard to degrade due to its high content of organic compounds, complexity of the components and high chroma[1]
Photocatalytic oxidation is regarded as a future advanced oxidation technology for the removal of toxic organic dye from water
Stirring the mixture was continued for about 2h, and the solution was aged at room temperature
Summary
Dye wastewater is hard to degrade due to its high content of organic compounds, complexity of the components and high chroma[1]. Photocatalytic oxidation is regarded as a future advanced oxidation technology for the removal of toxic organic dye from water. Most attention has been focused on TiO2 because of its characters of environmental-protecting, sound stability, non-secondary-pollution and effective degradation[2]. The photocatalytic activity of TiO2 is unsatisfactory because of the recombination of light-generated electron-hole pairs and the agglomerate phenomena[3]. It has been proved that the TiO2-C compound materials have more outstanding catalyzed effect[4,5]. The unique physical properties could be favorate to separate electron-hole pairs and avoid agglomeration that in turn leading to the enhanced photocatalytic activity[6,7].
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