2025 - Sustainable Industrial Processing Summit
SIPS2025 Volume 5. Meyers Intl. Symp. / Composite
| Editors: | F. Kongoli, P. Assis, H.A.C. Lopera, S. Diaz, S.N. Monteiro, V.S. Candido |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2025 |
| Pages: | 316 pages |
| ISBN: | 978-1-998384-46-4 (CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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CALCIUM AND STRONTIUM CARBOXYLATES AS PRECURSORS OF ADVANCED NANOCOMPOSITE MATERIALS
Igor Uflyand1; Anastasiya Zarubina1; Vladimir Zhinzhilo1;1SOUTHERN FEDERAL UNIVERSITY, Rostov-on-Don, Russian Federation;
Type of Paper: Regular
Id Paper: 303
Topic: 18
Abstract:
Due to their unique characteristics, nanocomposite materials are a promising alternative to existing sensor materials, capable of providing high sensitivity, extremely low detection levels of gases (at the ppb and ppm level) and chemical vapors (at ~1 ppb), high selectivity and low energy consumption, as well as operating in ambient conditions. Therefore, the study of such materials, along with the fundamental, has enormous applied significance. It should be noted that the interest of researchers in multicomponent metal-containing nanocomposite materials has noticeably increased recently [1-3].
The general method for the synthesis of unsaturated mono- and dicarboxylates of calcium and strontium is based on the direct interaction of aqueous solutions of metal salts and the corresponding unsaturated acid with the addition of sodium hydroxide to increase the yield of the final product. The main methods used in the study of controlled thermolysis of metal-containing monomers were DSC, DTA, and TGA. The composition and structure of the obtained metal-polymer nanocomposites were studied using the methods of elemental analysis, IR spectroscopy, X-ray phase analysis, energy-dispersive analysis, scanning and transmission electron microscopy, and atomic force microscopy.
New methods have been developed and known ones have been modified for the synthesis of metal-containing calcium and strontium monomers based on unsaturated mono- and dicarboxylic acids: acrylic, maleic, itaconic, cinnamic, fumaric, trans, trans-muconic, propargyl, acetylenedicarboxylic, 4-pentynic. The composition and structure of the obtained compounds have been characterized using various physicochemical methods (elemental analysis, IR, Raman, XPS spectroscopy, EXAFS, XRF, SEM, TEM, AFM). For the first time, new types of functional two-component (metal oxide/graphene oxide) nanocomposites with a wide variation in weight composition (1, 5, 10 and 20% graphene oxide) have been obtained.
The proposed method for producing calcium- and strontium-containing nanocomposites is simple and inexpensive, making it suitable for large-scale production.
The structural and electronic properties of the obtained nanocomposites were studied using experimental (SEM, TEM, XRD, VSM, UV-visible spectroscopy, Raman spectroscopy, FTIR spectroscopy, NMR, AFM, J-V characteristics, dielectric studies, impedance analyzer, electrometers, etc.) and theoretical methods (quantum chemical calculations). The functional properties of the obtained nanocomposites were studied using the example of sensor characteristics. For the first time, methods for applying films based on the synthesized nanocomposites to Corning glass substrates were developed using spin-coating (SC), dip-coating (DC) and chemical vapor deposition (CVD) technologies to obtain homogeneous thin films. The physical parameters of the films and their sensor properties (speed, detection limit, range of detectable contents, selectivity, long-term stability and calibration, response and recovery time of the sensor, reproducibility, interfering effects, such as the effect of CO2, temperature and humidity) were studied. The obtained films were used in sensors of ammonia, nitrogen oxide, carbon dioxide, volatile organic compounds (VOCs), such as benzene and acetone.
Comparison of the proposed sensors with other sensors described in the literature shows that they have good analytical characteristics. This indicates the prospects of the proposed approach based on the use of the obtained metal-containing nanocomposites as sensitive elements for solving the problem of gas detection.
Thus, new two-component nanocomposite materials including metal oxides and graphene oxide have been found. Films based on the synthesized nanocomposites have been obtained and studied, exhibiting improved sensor properties. Sensors for ammonia, nitrogen oxide, carbon dioxide, volatile organic compounds (VOCs) such as benzene and acetone have been developed.