Photosensitive Organic-Inorganic Hybrid Materials for Room Temperature Gas Sensor Applications

Nanomaterials
Marina RumyantsevaAlexander Gaskov

Abstract

In this work, the hybrids based on nanocrystalline SnO₂ or In₂O₃ semiconductor matrixes and heterocyclic Ru(II) complex are studied as materials for gas sensors operating at room temperature under photoactivation with visible light. Nanocrystalline semiconductor oxides are obtained by chemical precipitation with subsequent thermal annealing and characterized by XRD, SEM and single-point BET methods. The heterocyclic Ru(II) complex is synthesized for the first time and investigated by ¹H NMR, 13C NMR APT, MALDI-MS analysis, and UV-Vis spectroscopy. The HOMO and LUMO energies of the Ru(II) complex are calculated from cyclic voltammetry data. The hybrid materials are characterized by TGA-MS analysis and EDX mapping. The optical properties of hybrids are studied by UV-Vis spectroscopy in the diffuse reflection mode. The investigation of spectral dependencies of photoconductivity of hybrid samples demonstrates that the role of organic dye consists in shifting the photosensitivity range towards longer wavelengths. Sensor measurements demonstrate that hybrid materials are able to detect NO₂ in the concentration range of 0.25⁻2 ppm without the use of thermal heating under periodic illumination with even low-energy long-wavelength (red)...Continue Reading

References

Mar 4, 2003·Inorganic Chemistry·Idalina M M de CarvalhoMarcelo H Gehlen
Nov 20, 2009·Physical Chemistry Chemical Physics : PCCP·Joan Daniel PradesJoan Ramon Morante
Dec 20, 2013·Sensors·Kuang-Yow LianWen-Tsai Sung
Feb 23, 2017·Chemical Reviews·Roberto PaolesseCorrado Di Natale

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Citations

Apr 7, 2020·Physical Chemistry Chemical Physics : PCCP·Sergey TokarevGediminas Jonusauskas
Jan 8, 2020·Nanomaterials·Abulkosim NasriddinovAlexander Gaskov
Jul 25, 2019·Sensors·Abulkosim NasriddinovHyoun Woo Kim
Aug 29, 2019·Nanomaterials·Valentine P Ananikov
Aug 23, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Roberta RisolutiStefano Materazzi
May 14, 2020·Nanomaterials·Abulkosim NasriddinovAlexander Gaskov
May 1, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Pavel PadnyaIvan Stoikov

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Methods Mentioned

BETA
transmission electron microscopy
chip
X-ray
column chromatography
scanning electron microscopy

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