ntvНаучно-технический вестник информационных технологий, механики и оптикиScientific and Technical Journal of Information Technologies, Mechanics and Optics2226-14942500-0373Университет ИТМО10.17586/2226-1494-2023-23-3-465-472ntv-6Research ArticleНОВЫЕ МАТЕРИАЛЫ И НАНОТЕХНОЛОГИИMATERIAL SCIENCE AND NANOTECHNOLOGIESФрактальные микро- и нанодендриты из серебра, меди и их соединений для фотокаталитического разложения водыFractal micro- and nanodendrites of silver, copper and their compounds for photocatalytic water splittinghttps://orcid.org/0000-0001-8730-4389СидоровА. И.SidorovA. I.

Сидоров Александр Иванович — доктор физико-математических наук, доцент, ведущий научный сотрудник

sc 57193232588 

Санкт-Петербург, 197101 

Alexander I. Sidorov — D.Sc. (Physics & Mathematics), Associate Professor, Leading Researcher

sc 57193232588 

Saint Petersburg, 197101 

sidorov@oi.ifmo.ruhttps://orcid.org/0000-0002-5415-8749БезруковП. А.BezrukovP. A.

Безруков Павел Андреевич — аспирант 

sc 57219516957 

Санкт-Петербург, 197101 

Pavel A. Bezrukov — PhD Student 

sc 57219516957 

Saint Petersburg, 197101 

pawqa1@yandex.ruhttps://orcid.org/0000-0002-2542-7364НащекинА. В.NashchekinA. V.

Нащекин Алексей Викторович — кандидат физико-математических наук, старший научный сотрудник

sc 6603372975 

Санкт-Петербург, 194021 

Alexey V. Nashchekin — PhD (Physics & Mathematics), Senior Researcher 

sc 6603372975 

Saint Petersburg, 194021 

nashchekin@mail.ioffe.ruhttps://orcid.org/0000-0002-1341-067XНиконоровН. В.NikonorovN. V.

Никоноров Николай Валентинович — доктор физико-математических наук, профессор, профессор

sc 7003772604 

Санкт-Петербург, 197101 

Nikolay V. Nikonorov — D.Sc. (Physics & Mathematics), Full Professor 

sc 7003772604 

Saint Petersburg, 197101 

Nikonorov@oi.ifmo.ruУниверситет ИТМОРоссияITMO UniversityRussian FederationПавел Андреевич БезруковРоссияITMO UniversityRussian FederationФизико-технический институт им. А.Ф. ИоффеРоссияIoffe InstituteRussian Federation202310122024233465472Copyright © Сидоров А.И., Безруков П.А., Нащекин А.В., Никоноров Н.В., 20242024Сидоров А.И., Безруков П.А., Нащекин А.В., Никоноров Н.В.Sidorov A.I., Bezrukov P.A., Nashchekin A.V., Nikonorov N.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://ntv.elpub.ru/jour/article/view/6

Введение. Представлены результаты исследования морфологии и фотокаталитического разложения воды тонких нанопористых пленок в виде фрактальных дендритов из серебра и меди, а также их соединений — йодида и оксида. Метод. Нанопористые слои из серебра и меди синтезированы методом химической реакции замещения на металлических подложках. Йодирование проведено в парах йода. Оксидирование выполнено путем нагрева на воздухе. Изучение морфологии и состава синтезированных слоев осуществлено с помощью сканирующего электронного микроскопа. Основные результаты. Показано, что уже через 2–3 с после начала реакции на подложках формируются металлические нанопористые слои толщиной до 1 мкм. Слои серебра состоят из кристаллических гексагональных пластин и микро- и нанодендритов. В случае реакции замещения с солью меди сразу происходит формирование слоя, состоящего из медных микродендритов. Внутренний квантовый выход фотокатализа воды для слоев с серебром и медью, а также слоев металл-полупроводник составил 0,4– 0,45 %. Обсуждение. Полученные результаты могут быть использованы для создания фотокатодов с большой поверхностью для фотокаталитического разложения воды с целью получения водородного топлива.

The results of investigation of morphology and photocatalytic properties of thin films in a form of dendrites of silver and copper, and their compounds synthesized by the reaction of substitution, are presented. The morphology and the composition of the synthesized layers were performed by scanning electron microscope. It was shown that already through 2–3 s after the reaction beginning metal nanoporous layers up to 1 μm thick are formed on the substrates. Silver layers consist of micro-crystalline hexagonal plates and micro- and nano-dendrites. As the duration of the reaction increases the layers become more compacted, and the minimum of the pores size becomes 20 nm. In the case of the reaction with the copper salt the formation of copper microdendrites takes place immediately. The internal quantum yield of photocatalysis of water for silver and copper layers as well as for metal-semiconductor layers is 0.4–0.45 %. The obtained results can be used for the creation of photocathodes with large surface for photocathalytic water splitting in order to obtain hydrogen fuel.

нанопористый слойсеребромедьморфологияфотокатализnanoporous layersilvercoppermorphologyphotocatalysisРабота проводилась при финансовой поддержке Российского научного фонда, проект № 20-19-00559. Электронно-микроскопические исследования выполнены с использованием оборудования Федерального центра коллективного пользования «Материаловедение и диагностика в передовых технологиях» при финансовой поддержке Минобрнауки России.This work was financially supported by the Russian Science Foundation (Project No. 20-19-00559). SEM characterization were performed using equipment owned by the Federal Joint Research Center “Material Science and Characterization in Advanced Technology” with financial support by the Ministry of Education and Science of the Russian Federation.ReferencesHoffmann M.R., Martin S.T., Choi W., Bahnemann D.W. Environmental applications of semiconductor photocatalysis // Chemical Reviews. 1995. V. 95. N 1. 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The authors declare that there are no conflicts of interest present.