Мезокристаллы Диоксида Титана. Рабочая Поверхность В Фотокаталитических Реакциях

Садовников, А. А.; Нечаев, Е. Г.; Бельтюков, А. Н.; Гаврилов, А. И.; Макаревич, А. М.; Бойцова, О. В.

doi:10.31857/s0044457x2104019x

Cited by 2 publications

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“…В связи, с чем встает необходимость корректировки модифицирующих компонентов для TiO2, при которых происходит увеличения его активности в УФ-облучении. Известны способы [12][13][14][15][16] повышения эффективности TiO2 за счет обработки его поверхности оксидом кремния, а так как SiO2 присутствует в составе минеральных вяжущих, это дополнительно будет способствовать усилению фотокаталитической активности.…”

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The Use of Photocatalytic Concretes in Road Construction

Shestakov

Alekseeva

Polosina

2021

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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The article discusses the possibility of reducing the atmospheric environmental load of highways by applying compositions with photocatalytic properties to acoustic screens. It is found that the amount of nitrogen oxides on the territory of the city of Moscow exceeds the MPC norms. Therefore, a potential way to reduce the level of the average daily and maximum one-time MPC of nitrogen oxides is proposed, when using coatings of traditional acoustic screens with photocatalytic compositions. Titanium dioxide in anatase form is considered as a photocatalytic agent. To reduce the density and increase the porosity of cement compositions, a cellulosic suspension obtained by saturation in an aqueous medium with subsequent homogenization is introduced. The effect of cellulose in the considered cement systems in combination with a photocatalytic agent has been investigated. By the method of mathematical planning, a two-factor compositional experiment is compiled. In result, the degrees of influence of titanium dioxide and cellulose additives on the strength, density and water absorption of the composites under study are established. The study of the structure of the obtained composites shows that TiO2 is mainly located on the surface of cellulose fibers, which theoretically increases the useful surface for photocatalytic reactions and, as a consequence, the final efficiency of the compositions.

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unclassified

The Use of Photocatalytic Concretes in Road Construction

Shestakov

Alekseeva

Polosina

2021

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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Effect of the photonic band gap position on the photocatalytic activity of anodic titanium oxide photonic crystal

Belokozenko,

Sapoletova,

Kushnir

et al. 2024

Žurnal neorganičeskoj himii

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The slowing down of the group velocity of light at the edges of the photonic band gap is one of the important optical effects observed in photonic crystals. In particular, the “slow light” effect is used in photocatalysis to increase the photocatalytic activity of semiconductors. In this work, anatase photonic crystals with different spectral positions of the photonic band gap (390–1283 nm, measured in water) were obtained. It is shown that if one of the photonic band gaps is located near the absorption edge of the semiconductor (410 nm), photonic crystal exhibits high photocatalytic activity in the photodegradation of methylene blue. At the same time, the photocatalytic activity of anatase photonic crystal increases by 30% when the photonic band gap of the third order rather than the first order is located near the absorption edge of the semiconductor.

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Мезокристаллы Диоксида Титана. Рабочая Поверхность В Фотокаталитических Реакциях

Cited by 2 publications

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The Use of Photocatalytic Concretes in Road Construction

The Use of Photocatalytic Concretes in Road Construction

Effect of the photonic band gap position on the photocatalytic activity of anodic titanium oxide photonic crystal

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