Abstract
The author has investigated the process to obtain zirconium (IV) oxymethanesulfonate via the interaction between methane sulfonic acid (CH 3 SO 3 H) (MSA) and zirconium (IV) oxocarbonate (ZrOCO 3 . nH 2 O), and explored its basic physical-chemical and technological properties. The research was undertaken to address the lack of data on the chemistry of such a class of organic compounds as zirconium (IV), as well as to examine their possible application in modern materials science. The methods of element, X-ray phase, thermal, and infrared analyses have confirmed that the product of interaction between zirconium (IV) oxocarbonate (ZrOCO 3 . nH 2 O) and methane sulfonic acid is zirconium (IV) oxymethanesulfonate with the composition ZrO(CH 3 SO 3 ) 2 . 4H 2 O. It has been established that the synthesized zirconium (IV) oxymethanesulfonate is a white crystalline powder, which dissolves well in water while is weakly soluble in ethanol and isopropyl alcohol. It absorbs moisture in the open air. It thermally decomposes in the temperature range of 390‒410 о С, forming a low-temperature cubic zirconium dioxide modification that, at temperatures above 750 ° C, consistently passes into the monoclinic structure of zirconium dioxide. At the zirconium (IV) oxymethanesulfonate thermolysis there form the nanodispersed powders of zirconium dioxide whose size of primary particles is 20‒50 nm, which, under the action of dispersion forces, agglomerate into aggregates of 200–400 nm. The specific surface of powders, determined based on a BET procedure, is 32 m 2 /g. It has been shown that the aqueous-alcohol solutions of ZrO(CH 3 SO 3 ) 2 . 4H 2 O actively interact with solid surfaces thereby forming hyperfine near-the-surface polymerized films, from which, when treated thermally, the surface coatings are formed from zirconium dioxide. Thus, new data have been acquired on the chemistry of complex compounds of zirconium(IV). This paper shows promising application of zirconium (IV) oxymethanesulfonate for the needs of modern materials science
Highlights
Obtaining new organic compounds of zirconium (IV) oxymethanesulfonate and their application to solve modern tasks of materials science is a promising field in the chemistry and technology of materials based on it [1]
The most common organic compounds of zirconium that are used to obtain the nanodispersed powders of zirconium dioxide, as well as film coatings, are alcoholates, zirconium(IV) glycerates and acetylacetonates [4, 5]
The study conducted set the aim to synthesize zirconium(IV) oxymethanesulfonate, to establish its physical-chemical characteristics, in order to use it as a precursor for obtaining the nanodispersed powders of zirconium dioxide, as well as zirconium-containing oxide coatings
Summary
Obtaining new organic compounds of zirconium (IV) oxymethanesulfonate and their application to solve modern tasks of materials science is a promising field in the chemistry and technology of materials based on it [1]. This primarily relates to obtaining the nanodispersed oxide zirconium-containing powdered materials and ultra-thin film coatings for advanced equipment [2]. Methane sulfonates are characterized by great solubility in water and alcohols, relatively low cost, the possibility to form hetero-metallic complex compounds, low temperature of decomposition and high film-forming properties. These properties give reason to argue about the prospect of applying methane sulfonates to obtain ... in order to solve tasks in modern materials science
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