Organic-Inorganic Hybrid Materials for Room Temperature Light-Activated Sub-ppm NO Detection
Autor: | Alexander Gaskov, Marina Rumyantseva, Olga A. Fedorova, Sergey Tokarev, Abulkosim Nasriddinov, Polina Yaltseva, Tatyana B. Shatalova, N. O. Khmelevsky |
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Jazyk: | angličtina |
Rok vydání: | 2019 |
Předmět: |
Thermogravimetric analysis
Materials science General Chemical Engineering Ru (II) complex Analytical chemistry Nanocrystalline material Article lcsh:Chemistry symbols.namesake lcsh:QD1-999 organic–inorganic hybrid materials nitrogen monoxide NO semiconductor gas sensor visible light activation symbols tin dioxide General Materials Science Thermal stability Diffuse reflection indium oxide room temperature Spectroscopy Hybrid material Raman spectroscopy HOMO/LUMO |
Zdroj: | Nanomaterials Volume 10 Issue 1 Nanomaterials, Vol 10, Iss 1, p 70 (2019) |
ISSN: | 2079-4991 |
DOI: | 10.3390/nano10010070 |
Popis: | Nitric oxide (NO) is one of the main environmental pollutants and one of the biomarkers noninvasive diagnosis of respiratory diseases. Organic-inorganic hybrids based on heterocyclic Ru (II) complex and nanocrystalline semiconductor oxides SnO2 and In2O3 were studied as sensitive materials for NO detection at room temperature under periodic blue light (&lambda max = 470 nm) illumination. The semiconductor matrixes were obtained by chemical precipitation with subsequent thermal annealing and characterized by XRD, Raman spectroscopy, and single-point BET methods. The heterocyclic Ru (II) complex was synthesized for the first time and characterized by 1H NMR, 13C NMR, MALDI-TOF mass spectrometry and elemental analysis. The HOMO and LUMO energies of the Ru (II) complex are calculated from cyclic voltammetry data. The thermal stability of hybrids was investigated by thermogravimetric analysis (TGA)-MS analysis. The optical properties of Ru (II) complex, nanocrystalline oxides and hybrids were studied by UV-Vis spectroscopy in transmission and diffuse reflectance modes. DRIFT spectroscopy was performed to investigate the interaction between NO and the surface of the synthesized materials. Sensor measurements demonstrate that hybrid materials are able to detect NO at room temperature in the concentration range of 0.25&ndash 4.0 ppm with the detection limit of 69&ndash 88 ppb. |
Databáze: | OpenAIRE |
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