Nanocomposites and nanomaterials

Metaloxide nanomaterials for environmental applications
T.A. Dontsova
National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", Prospect Peremogy, 37, Kyiv-03056, Ukraine.
E-mail: dontsova@xtf.kpi.ua
Materials based on nanostructured and nanosized metal oxides represent a large class of nanomaterials from the point of view of electronic structure, physical-chemical and electromagnetic properties. The application of metal-oxide nanomaterials and nanocomposites based on them more and more gaining popularity in the field of ecology, in particular, as adsorbents and photocatalysts, as well as the materials used for the manufacture of devices for environmental monitoring.
Adsorption materials based on nanoscale metal oxides usually have a high specific surface, high capacity, fast kinetics and specific affinity to various contaminants. The use of nanostructured metal oxides in photocatalytic processes can contribute effectively oxidization organic compounds which do not decompose through biochemical methods, and post-treatment of aqueous solutions with their help it is considered to be the most promising [1]. Metaloxide nanostructures used in environmental monitoring as sensitive layers chemoresistance gas sensors are characterized by high values of the sensor signal is due to the large specific surface area, and hence a higher adsorption capacity [2].
Consequently, metaloxide nanoscale materials are of considerable interest with significant advantages over bulk counterparts and, of course, have big prospects for obtaining on their basis of new types of adsorbents, photocatalysts and sensitive layers of gas sensors.
Thus, the creation of metaloxide nanomaterials for their application in the environmental area is the way to impart them unique properties, as well as amplify existing ones. It is opens up new horizons for their future reference [3].

1.	Dontsova T.A. et al. Synthesis and characterization of titanium (IV) oxide from various precursors Springer Proceedings in Physics 2015, 183 : 331.
2.	Dontsova T.A., Nagirnyak S.V. et al. SnO2 Nanostructures: Effect of Processing Parameters on Their Structural and Functional Properties // Nanoscale Research Letters 2017, 12 : 332.
3.	Dontsova T.A. The creation of nanocomposite materials to solve environmental problems // The International research and practice conference «Nanotechnology and nanomaterials» (NANO-2017). Abstract Book of participants of the International Summer School and International research and practice conference, 23-26 August 2017, Chernivtsi. Edited by Dr. Olena Fesenko. - Kiev: SME Burlaka, 2017. – P. 175.