Elektrohemijska i hemijska sinteza i karakterizacija katalizatora i sorbenata na bazi jedinjenja bizmuta i njihova primena u tretmanu vode

Abstract

This dissertation is a part of the research performed within the Projects of the Ministry of Education, Science and Technological Development of the Republic of Serbia: Grant No. TR 34008 and Agreement No. 451-03-68/2020-14/200124. The experimental part of this thesis was done in the Laboratory for Applied and Environmental chemistry, Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš. Some of the analyzes of material characterization were done at the Faculty of Engineering and Science, University of Greenwich, UK, the Faculty of Technology in Leskovac, University of Niš, the Materials Science Laboratory, Institute of Nuclear Sciences, University of Belgrade, the Faculty of Chemistry, University of Belgrade. The aim of this doctoral dissertation was to develop chemical and electrochemical procedures for obtaining highly efficient photocatalysts and sorbents based on bismuth compounds. The bismuth oxo citrate photocatalyst was synthesized by precipitation method with subsequent thermal treatment. The preparation of sorbents based on basic bismuth nitrates was performed by the method of cathodic electrodeposition from an acidic solution of Bi(III) ions with subsequent thermal treatment. Material characterization was performed by the following methods: SEM-EDX, adsorption/desorption of N2, XRD, FTIR, CHNS/O and acid-base analysis. The basic parameters of the photocatalytic and sorption process were examined and the optimal conditions for the removal of textile dye Reactive Blue 19 (RB19) were determined. The obtained results showed that the synthesized materials can be successfully applied for the removal of dye from real polluted waters and that their efficiency is higher compared to other materials based on bismuth compounds which can be found in the available literature.