The mechanism of sonophotocatalytic degradation of methyl orange and its products in aqueous solutions
Yuanhua He, Franz Grieser, Muthupandian Ashokkumar
Ultrasonics Sonochemistry | ELSEVIER SCIENCE BV | Published : 2011
In this study, it was found that a hybrid technique, sonophotocatalysis, is able to degrade a parent organic pollutant (methyl orange) as well as its by-products. The analysis of products formed during the whole degradation has demonstrated that the pH or the selection of oxidation process (sonolysis/photocatalysis/sonophotocatalysis) is able to control the degradation pathway. It was shown in the by-products analysis that the solution pH can alter the amount of each product generated during the sonophotocatalytic degradation. It was revealed that the different degradation rates of methyl orange and its products result from the solution pH and the nature of the organic products. Furthermore,..View full abstract
The financial support and the infrastructural facilities provided by Particulate Fluids Processing Centre (PFPC), a special research centre funded by the Australian Research Council (ARC), are greatly acknowledged. Particular acknowledgements are extended to our colleagues, Dr. Adam Brotchie and Dr. Glenna Drisko, for the help in preparation of manuscript. Y. He thanks the University of Melbourne for the award of an International Postgraduate Research Scholarship (IPRS) and the David Hay Memorial Fund.