Изготовление сверхвысокочувствительного газового сенсора, работающего при комнатной температуре, на основе мезопористых наночастиц WO₃, легированных никелем

В работе сообщается о сверхвысокочувствительном датчике газа при комнатной температуры на основе наночастиц WO₃, легированных никелем (далее НЧ). Синтез чистых и легированных никелем НЧ WO₃ осуществлялся методом осаждения. Рентгенофазовые исследования выявили поликристаллическую моноклинную структуру полученных образцов с преимущественной ориентацией роста вдоль кристаллической плоскости (002). Был проведен анализ с помощью SEM и FE-SEM, и микрофотографии показали, что синтезированные образцы имеют высокопористую структуру с превосходной диспергируемостью. Успешное внедрение ионов Ni²⁺ в решетку WO₃ было подтверждено анализом РФЭС. Значительно улучшенные характеристики обнаружения газа WO₃ при комнатной температуре за счет легирования Ni также изучались с использованием высокочувствительного электрометра. По сравнению с нелегированным WO₃, датчик WO₃, легированный 3 мол. % Ni, показал почти в 20 раз большую чувствительность (2641–200 ppm аммиака при комнатной температуре) с быстрым временем отклика/восстановления 40/97 с.

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