TITANIUM DIOXIDE SYNTHESIS BY SULPHATE METHOD
Yushchenko Y.A., Yushchenko O.A., Dontsova T.A., Krimets G.V.
National Technical University of Ukraine
«Kyiv Polytechnic Institute», Kyiv, Ukraine
Decontamination of pharmaceutical wastewater has always been an important aspect in the pharmaceutical industry. While manufacturing the drugs a large amount of wastewater is produced. It requires an immediate neutralization prior to discharge into the sewer. To solve this problem, a photocatalytic method is promising for purification of wastewater using the titanium oxide (IV) (TiO2). From this point of view the development of TiO2 synthesis is relevant to provide an anatase analogue, which would have high photocatalytic activity. This technology is easy to integrate into the existing enterprises in Ukraine to obtain the pigmental titanium oxide.
The aim of this work was to obtain TiO2 by sulfate method for different values of pH of the aqueous medium.
Synthesis was carried out as follows. Weighed quantity of titanium oxysulfate was added to the reactor and was stirred with sodium sulfate acid (pH 2 and pH 4), then hydrolysis was cunducted for 30 minutes. The samples thus obtained of titanium oxide (IV) was further filtered, washed and dried at 100 ° C. Analysis of the samples was carried out on a diffractometer TiO2 Ultima IV Rigaku.
Pic.1 X-ray pictures of ТіO2 samples.
The X-ray pictures of ТіO2 samples are shown in Picture 1. The Comparison of the main peaks with a standard card №9009086, database USER (COD), shows that in both cases the pure anatase analogue of TiO2 is produced. These structural analyzes indicates that the particles have small crystallite sizes (at pH 2 - 3.16 nm and at pH 4 - 1.93 nm). Thus, this method provides a synthesis of nanostructured powders of titanium oxide (IV) in the anatase analogue in the studied pH range. The further researches will be devoted to studies of the photocatalytic properties.