Nanocomposite Based on HA/PVTMS/Cl2FeH8O4 as a Gas and Temperature Sensor

In this paper, a novel nanocrystalline composite material of hydroxyapatite (HA)/polyvinyltrimethoxysilane (PVTMS)/iron(II)chloride tetrahydrate (Cl2FeH8-O4) with hexagonal structure is proposed for the fabrication of a gas/temperature sensor. Taking into account the sensitivity of HA to high temper...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2022-12, Vol.22 (24), p.10012
Main Authors: Nasiri, Sohrab, Rabiei, Marzieh, Markuniene, Ieva, Hosseinnezhad, Mozhgan, Ebrahimi-Kahrizsangi, Reza, Palevicius, Arvydas, Vilkauskas, Andrius, Janusas, Giedrius
Format: Article
Language:English
Subjects:
Absorption
Chemical elements
Composite structures
Crystallites
Drug delivery systems
Fourier transforms
freeze-dryer
Gas detectors
Gases
HA/PVTMS/Cl2FeH8O4
Heat
High temperature
Hydroxyapatite
Metal oxides
nanocomposite
Nanocomposites
Nitrates
Photoluminescence
Polymerization
Research methodology
Selectivity
sensor
sol–gel
Spectrum analysis
Temperature sensors
Transplants & implants
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Summary:In this paper, a novel nanocrystalline composite material of hydroxyapatite (HA)/polyvinyltrimethoxysilane (PVTMS)/iron(II)chloride tetrahydrate (Cl2FeH8-O4) with hexagonal structure is proposed for the fabrication of a gas/temperature sensor. Taking into account the sensitivity of HA to high temperatures, to prevent the collapse and breakdown of bonds and the leakage of volatiles without damaging the composite structure, a freeze-drying machine is designed and fabricated. X-ray diffraction, FTIR, SEM, EDAX, TEM, absorption and photoluminescence analyses of composite are studied. XRD is used to confirm the material structure and the crystallite size of the composite is calculated by the Monshi–Scherrer method, and a value of 81.60 ± 0.06 nm is obtained. The influence of the oxygen environment on the absorption and photoluminescence measurements of the composite and the influence of vaporized ethanol, N2 and CO on the SiO2/composite/Ag sensor device are investigated. The sensor with a 30 nm-thick layer of composite shows the highest response to vaporized ethanol, N2 and ambient CO. Overall, the composite and sensor exhibit a good selectivity to oxygen, vaporized ethanol, N2 and CO environments.
ISSN:1424-8220
1424-8220
DOI:10.3390/s222410012