The Use of Photocatalytic Technology for the Disintegration of Hazardous Chemical Substances
Year: 2019
Type: conference-paper
Abstract: Introduction.The experience of recent years shows that in modern world the threat of using nuclear, biological and chemical weapons as well as high-precision weapons remains, as a result of which potentially hazardous facilities can be destroyed.There are more than 1,5 thousands chemically dangerous objects on the territory of Ukraine, whose activity is related to the production, use, storage and transportation of hazardous chemicals, and more than 22 million people live in the areas of their location.The danger of functioning of these objects of economic activity (chemically dangerous objects) is related to the probability of accidental emissions (spillages) of a large number of hazardous chemical substances (hereinafter referred to as «HCHS») outside the objects, because many of them retain 3-15 daily supplies of chemicals.Since the effectiveness of the assigned tasks depends of the degree of protection of personnel, it is necessary to look for approaches to address this problem.Filterventilator units, both stationary and on armored vehicles, and filter systems that were created in Soviet times, do not protect personnel from hazardous chemical substances, as chlorine, ammonia, sulfur trioxide etc.Priority direction of improving the efficiency of the filtering systems from HCHS to protect armored vehicles and stationary structures is the additional installation of the mesh with a coated layer of catalytic material in the absorber filter.Neutralization of toxins of different nature due to photocatalytic gas purification [1], in which titanium dioxide is used as a photocatalyst, is a promising development direction in the defense sphere of the state.Exposition of basic research material.Photocatalytic properties of titanium (IV) oxide [2] depend on its morphology, crystalline form, particle size, specific surface.The most famous forms are anatase, rutile, brookite and a new modification -eta TiO 2 (η-TiO 2 ).Titanium oxide, when absorbing a quantum of light with an energy greater than 3.2 eV (light with a wavelength less than 390 nm -ultraviolet), generates free charge carriers -negative (electrons) and positive vacancies (holes).Electrons
Authors: Oleksandr Halak, Sergey Menshov
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2985642961