Thermolysis of benzoates based on cobalt, copper, nickel

Abstract

The widespread use of toxic aromatic organic compounds in industry makes it necessary to remove these pollutants from wastewaters. Currently, nanocomposites are used as materials for the manufacture of anodes for electrochemical oxidation of difficult-to-oxidize organic compounds, such as phenols. The object of the study is organic salts of transition metals: cobalt, nickel, and copper benzoates in the role of possible doping additives to composite materials. Cobalt, nickel, and copper benzoates are inorganic compounds with the general formula Me(C_6 H_5 COO)_2∙nH_2 O. The aim of the paper is to study the synthesis features of cobalt, nickel, copper benzoates, as well as to study the thermolysis process of glassy carbon materials with additives of benzoates of 3d elements. To achieve the study aim, the following objectives have been met: the synthesis reactions of cobalt, nickel, copper benzoates have been set; the composition and structure of the synthesis products obtained have been investigated: the distribution maps for elements, as well powder radiographs and thermograms have been obtained; glass composite materials based on phenol-formaldehyde resin with additives of cobalt, nickel, and copper benzoates have been obtained; the composition and structure of glass composite materials have been investigated. To study the obtained samples, a complex of physico-chemical research methods has been used: scanning electron microscopy, X-ray phase analysis, differential thermal analysis. During the study of thermolysis of cobalt, nickel, and copper benzoates, temperature intervals characteristic of the loss of recrystallized water, the transition of the substances to oxides during thermolysis in the air and in the argon atmosphere have been established. The resulting composite materials are supposed to be used as electrodes in installations for electrochemical removal of toxic aromatic organic compounds from wastewater.