Реферат: Photocatalysis has the potential for efficient utilization of light energy reaching the Earth from the Sun. The photocatalytic processes can solve both energy and environmental issues for environmental protection and sustainable development. An efficient photocatalyst has to possess optimum positions of valence and conduction bands to generate under radiation charge carriers that have potentials high enough to occur target reactions with electron donors and acceptors. Nanocomposite materials obtained via combination of different semiconductors can have an enhanced photocatalytic activity due to optimum positions of energy bands of used semiconductors and possibility for heterojunction of photogenerated charge carriers between semiconductors. This talk will present our achievements in rational design of composite materials based on oxycompounds of transition metals (Ti, Bi, W, Co) for efficient utilization of visible light in the photocatalytic reactions. We have developed a simple preparation technique of N-doped TiO2 photocatalyst from TiOSO4 precursor. This photocatalyst can decompose organic pollutants, as well as split water, both under UV and visible light and can be used as a core material for design of efficient composite photocatalysts. Surface modification of N-doped TiO2 with metal species and its combination with narrow-band semiconductors (e.g., Bi2WO6, C3N4) lead to a substantial increase in its visible-light activity and stability due to an enhanced separation of charge carriers. Correlation between physicochemical characteristics of the composite materials and their activity in photocatalytic reactions will be discussed.

Библиографическая ссылка: Selishchev D. , Kovalevskiy N. , Fazliev T. , Lyulyukin M. , Kozlov D.
Nanocomposite Semiconducting Materials for Efficient Utilization of Visible Light in Photocatalytic Reactions
5th Edition of Nanotechnology and Nanomaterials Virtual Dec 9, 2022 - Mar 9, 2023