najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2024-15-6-867-878najo-185Research ArticleCHEMISTRY AND MATERIALS SCIENCEХИМИЯ И НАУКА О МАТЕРИАЛАХEffect of synthesis method on the structural, conductive and sensor properties of NiO–In2O3 nanocompositesВлияние метода синтеза на структурные, проводящие и сенсорные свойства нанокомпозитов NiO-In2O3https://orcid.org/0000-0003-4411-1119ИкимМ. И.IkimM. I.

Mariya I. Ikim

4 Kosygin Street, Moscow, 119991

ikimmary1104@gmail.comhttps://orcid.org/0000-0002-9401-1717ГромовВ. Ф.GromovV. F.

Vladimir F. Gromov

4 Kosygin Street, Moscow, 119991

vfgromov@mail.ruhttps://orcid.org/0000-0001-8692-0382ГерасимовГ. Н.GerasimovG. N.

Genrikh N. Gerasimov

4 Kosygin Street, Moscow, 119991

gerasimovgen@mail.ruhttps://orcid.org/0000-0001-8989-3965БекешевВ. Г.BekeshevV. G.

Valentin G. Bekeshev

4 Kosygin Street, Moscow, 119991

bvg495@yandex.ruhttps://orcid.org/0000-0001-9139-5754ТрахтенбергЛ. И.TrakhtenbergL. I.

Leonid I. Trakhtenberg

4 Kosygin Street, Moscow, 119991

litrakh@gmail.comN. N. Semenov Federal Research Center for Chemical Physics RASRussian FederationN. N. Semenov Federal Research Center for Chemical Physics RAS; Lomonosov Moscow State University; Moscow Institute of Physics and Technology(State University)Russian Federation202405062025156867878Copyright © Ikim M.I., Gromov V.F., Gerasimov G.N., Bekeshev V.G., Trakhtenberg L.I., 20252025Иким М.И., Громов В.Ф., Герасимов Г.Н., Бекешев В.Г., Трахтенберг Л.И.Ikim M.I., Gromov V.F., Gerasimov G.N., Bekeshev V.G., Trakhtenberg L.I.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/185

The structural, conductive and sensor properties of NiO–In2O3 composites synthesized by hydrothermal and impregnation methods are investigated and compared. The mixed oxide considered consists of nanoparticles with electronic (In2O3) and hole (NiO) conduction bands. The lattice parameters of indium oxide decrease with the introduction of NiO into composites synthesized by the hydrothermal method. The addition of 3 % NiO to the hydrothermal composite also increases its specific surface area. The specific surface area and In2O3 lattice parameters in the impregnated samples are essentially independent of the NiO content. The conductivity of impregnated composites is an order of magnitude lower than that of hydrothermal composites. An increase in NiO content leads to a significant enhancement of the sensor response to H2 and CO. In addition, there is a decrease in the optimal operating temperature of hydrothermal and impregnated samples by 60 and 20 ◦C, respectively.

Исследованы и сопоставлены структурные, проводящие и сенсорные свойства композитов NiO-In2O3, синтезированных гидротермальным способом и методом импрегнирования. Рассмотренный смешанный оксид состоит из наночастиц с электронной (In2O3) и дырочной (NiO) проводимостью. Параметр решетки оксида индия уменьшается при введении NiO в композиты, синтезированные гидротермальным методом. Добавление 3% NiO в гидротермальный композит также увеличивает его удельную поверхность. Удельная поверхность и параметры решетки In2O3 в импрегнированных образцах практически не зависят от содержания NiO. Проводимость импрегнированных композитов на порядок ниже, чем у гидротермальных композитов. Увеличение содержания NiO приводит к значительному увеличению сенсорного отклика на H2 и CO. Кроме того, происходит снижение оптимальной температуры эксплуатации гидротермальных и импрегнированных образцов на 60 °С и 20 °С, соответственно.

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The authors declare that there are no conflicts of interest present.