Investigation of phenol ozonolysis in the presence of zinc ferrite by UV-Vis spectroscopy
A. V. KALENSKII, A. A. ZVEKOV, K. A. KORCHUGANOVA, A. V. IVANOV, V. M. PUGACHEV, V. A. KACHURIN, I. M. CHIRKOVA
Kemerovo State University, Kemerovo, Russia
Keywords: ozonolysis, phenol, zinc ferrite, catalysis, UV-Vis spectroscopy
Abstract
The work is focused on the preparation of zinc ferrite and study of its catalytic activity in the phenol ozonolysis reaction in an aqueous medium. Zinc ferrite was synthesised by co- precipitation of the hydroxides with ammonia solution, followed by hydrothermal treatment of the precipitate at a temperature of 160 °C. The product was characterized by X-ray diffraction and infrared spectroscopy. The catalytic activity of zinc ferrite in phenol ozonolysis was studied. It has been determined by UV-Vis spectroscopy that the products of phenol oxidation are cis,cis-muconic acid (absorption in the region of 300-400 nm) and 1,4-benzoquinone (absorption band at 237 nm). It is shown that the addition of zinc ferrite not only accelerates phenol ozonolysis but also causes deeper oxidation; 1,4-benzoquinone is not formed if the catalyst is absent. The data obtained can be used to develop new water purification technologies based on a combination of ozonation and heterogeneous catalysis.
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