Nanocomposites and nanomaterials

Nanomaterials in water purification
Dontsova T.A., Кyrii S.O., Yanushevska O.I., Davydova M.Yu.
Department of Technology of Inorganic Substances, Water Purification and General Chemical Technology, Faculty of Chemical Technology, Igor Sikorsky Kyiv Polytechnic Institute. Prospect Peremohy, 37, Kyiv-03056, Ukraine
E-mail: : kysvit@gmail.com

Recently, nanotechnology has gained popularity in many fields of science and technology, among which water purification is no exception. Nanomaterials that are widely studied in water purification processes include nanoadsorbents, photocatalysts, nanocomposite membranes, and the like.
Among nanoadsorbents, the most significant attention is paid to carbon nanomaterials and nanoadsorbents based on metal oxides [1]. Numerous studies of these materials indicate their viability as sorption materials, as evidenced by the high adsorption capacity to various pollutants. 
The activity of photocatalytic nanomaterials, depends on their quantum efficiency, which is improved by modifying or creating nanocomposites [2]. Modified titanium oxide materials or their nanocomposites are successfully used to destroy organic compounds in an aqueous medium.
Nanocomposite membranes, in particular of a ceramic nature, are the least studied [3]. Ceramic nanocomposite membranes are of considerable interest because they allow to solve a wide range of problems, including such a topical today as the removal of nanoplastics and microplastics.
However, it should be noted that the issue of toxicity of nanomaterials, in particular nanoadsorbents, photocatalysts, and nanocomposite ceramic membranes, has not been fully resolved.. 

1.	 Dontsova T., Nahirniak S., Astrelin I. Metaloxide nanomaterials and nanocomposites of ecological purpose // Journal of Nanomaterials.-2019.-2019.-P. 1-31. 
2. Dontsova T., Kutuzova A., Bila K., Kyrii S., Kosogina I., Nechyporuk D. Enhanced Photocatalytic Activity of TiO2/SnO2 Binary Nanocomposites // Journal of Nanomaterials.-2020.-2020.-P. 1-13.
3. Serhiienko A., Dontsova T., Yanushevska O., Nahirniak S., Hosseini-Bandegharaei A. Ceramic membranes: new trends and prospects (short review) // Water and water purification technologies. Scientific and technical news.-2020.-2(27).-P. 4-31.