Gas-sensing properties of nanostructured CeO2-xZrO2 thin films obtained by the sol-gel method

Oxygen detection using nanostructured TiO2 thin films obtained by the molecular layering method

Microextrusion printing of gas-sensitive planar anisotropic NiO nanostructures and their surface modification in an H2S atmosphere

Zinc oxide obtained by the solvothermal method with high sensitivity and selectivity to nitrogen dioxide

Gas-sensitive nanostructured ZnO films praseodymium and europium doped: electrical conductivity, selectivity, influence of UV irradiation and humidity

It was studied how the conditions of heat treatment of a [Zn(H2O)(O2C5H7)2] solution in isoamyl alcohol at 120–140°C for 2–60 min affect the precursor decomposition mechanism and the characteristics of the obtained nanocrystalline zinc oxide. In all the cases, the product was a crystalline substance with the wurtzite structure and a size of crystallites of 14–18 nm, which was independent of the synthesis conditions. The thermal behavior and microstructure of the separated and dried nanostructured ZnO powder were investigated. It was determined how the duration and temperature of the heat treatment of the precursor solution affects the microstructure of ZnO coatings dip-coated onto glass substrates using dispersions produced at 120 and 140°C. The nanosized ZnO application procedure was shown to be promising for creating a gas-sensing layer of chemical gas sensors for detecting 1% H2 (
 $$R_0 /R_{H_2 } $$
 was 58 ± 2 at an operating temperature of 300°C) and 4 ppm NO2 (
 $$R_{NO_2 } /R_0$$
 were 15 ± 1 and 1.9 ± 0.1 at operating temperatures of 200 and 300°C, respectively).

Synthesis of nanocrystalline ZnO by the thermal decomposition of [Zn(H2O)(O2C5H7)(2)] in isoamyl alcohol

One-dimensional h-MoO3 structures were produced by a hydrothermal method. The effect of the hydrothermal treatment conditions on the microstructure and particle size of the formed oxide powder was shown. The formation of the hexagonal structure of the powder and the absence of crystalline impurities were confirmed by X-ray powder diffraction analysis. The electrophysical characteristics of the surface of the obtained powder were evaluated by scanning capacitance force microscopy and Kelvin probe force microscopy. The kinetics of the visible-light photocatalytic degradation of rhodamine B in the presence of h-MoO3 was studied.

Formation of One-Dimensional Hierarchical MoO 3 Nanostructures under Hydrothermal Conditions

A method was developed for the low-temperature sol–gel synthesis of one of the most popular components of functional and structural materials—nanostructured yttrium aluminum garnet Y3Al5O12—using precursors from the class of alkoxoacetylacetonates produced from the corresponding acetylacetonates. It was determined that increasing duration of heat treatment of yttrium-aluminum-containing xerogen in air to 6 h reduces the crystallization temperature of the Y3Al5O12 phase from 920–930 to 750–800°C, which was confirmed by IR spectroscopy and X-ray powder diffraction analysis. The microstructure of nanocrystalline yttrium aluminum garnet obtained at 800°С was studied; it was found that the size of crystallites is 30–40 nm, the size of particles is 30–50 nm, and the size of pores is 20–30 nm. Small-angle neutron scattering demonstrated that, in the powders synthesized at 700–800°C, there is structural ordering of the short-range type, whereas in the nanocrystalline samples heat-treated at a higher temperature (850°С), there is no such ordering.

Heat-Treatment-Induced Evolution of the Mesostructure of Finely Divided Y3Al5O12 Produced by the Sol–Gel Method

Synthesis of Vanadium-Doped Nano-Sized WO3 by a Combination of Sol–Gel Process and Hydrothermal Treatment

Hydrothermal Synthesis of Nanodisperse V2O5 Using Oxalic Acid

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