najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2021-12-3-291-302najo-460Research ArticleCHEMISTRY AND MATERIALS SCIENCEХИМИЯ И НАУКА О МАТЕРИАЛАХFabrication of room temperature operated ultra high sensitive gas sensor based on mesoporous Ni doped WO3 nanoparticlesИзготовление сверхвысокочувствительного газового сенсора, работающего при комнатной температуре, на основе мезопористых наночастиц WO3, легированных никелемDuraisamiM. S.DuraisamiM. S.

Melaiyur – 609107, Tamil Nadu

tharmamithran@gmail.comBenny AnburajD.Benny AnburajD.

Mayiladuthurai, Tamil Nadu

bennyanburaj@rediffmail.comParasuramanK.ParasuramanK.

Melaiyur – 609107, Tamil Nadu

resphy21@gmail.comPG & Research Department of Physics, Poompuhar College (Autonomous) (Affiliated to Bharathidasan University, Tiruchirappalli)IndiaPG & Research Department of Physics, D. G. Govt. Arts College (Affiliated to Bharathidasan University, Tiruchirappalli)India202104082025123291302Copyright © Duraisami M.S., Benny Anburaj D., Parasuraman K., 20252025Duraisami M.S., Benny Anburaj D., Parasuraman K.Duraisami M.S., Benny Anburaj D., Parasuraman K.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/460

Ultra high sensitive room temperature gas sensor based on Ni-doped WO3 nanoparticles (hereafter NPs) has been reported here. The synthesis of pure and Ni-doped WO3 NPs was done by facile precipitation route. XRD studies revealed the polycrystalline monoclinic structure of the prepared samples with the preferential growth orientation along (002) crystal plane. Analysis via SEM and FE–SEM was conducted, and the micrographs showed that the synthesized samples were found to have highly porous structure with excellent dispersibility. The successful incorporation of Ni2+ions in to WO3 lattice has been confirmed by XPS analysis. The highly improved room temperature gas sensing characteristics of WO3 by Ni doping is also studied using a high sensitive electrometer. Compared to undoped WO3, 3 mol. % Ni-doped WO3 sensor showed nearly 20-fold greater sensitivity (2641 – 200 ppm ammonia, room temperature) with rapid response/recovery times of 40/97 s.

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