СИНТЕЗ И ИССЛЕДОВАНИЕ ГАЗОЧУВСТВИТЕЛЬНЫХ СВОЙСТВ ПЛЕНОК НА ОСНОВЕ ОКСИДА ОЛОВА

В статье исследованы тонкие пленки оксида олова (SnO₂), полученные на стеклянных подложках, с целью создания чувствительных элементов для газоанализаторов, работающих при комнатной температуре. Были использованы три пленкообразующие системы: раствор SnCl₄*5H₂O в этаноле, гидрозоль гидроксида олова и их смесь. Пленки формировались методом спрей-пиролиза при 400 °C. Проведены рентгеноструктурный анализ и сканирующая электронная микроскопия, установлено, что размеры кристаллитов составляют 6–13 нм. Исследована чувствительность пленок к парам воды. Наиболее высокая чувствительность(R₀/Rпар= 3,75) и быстродействие (менее 1 секунды) наблюдаются у пленок, полученных из золя. Моделирование адсорбции на поверхностях t-SnO₂ (001) и c-SnO₂ (111) показало, что структура c-SnO₂ перспективна для детектирования угарного газа благодаря стабильным сенсорным свойствам в условиях высокой влажности. Полученные результаты представляют интерес для разработки новых сенсоров газов.

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