09 خرداد 1403
محمود ناصري

محمود ناصری

مرتبه علمی: دانشیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک-نانو
تلفن: 08132355404
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان
Gas sensing and electrochemical properties of rare earthferrite, LnFeO 3 (Ln = Nd, Sm)
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Conductometric sensor Electrochemical sensor Acetone Dopamine Rare earth Ferrite
سال
2020
مجله CERAMICS INTERNATIONAL
پژوهشگران محمود ناصری

چکیده

In this paper, nanostructured perovskite-type LnFeO3 (Ln = Nd, Sm) oxides were synthesized by thermal treatment method (TTM). Characterization analysis conducted by X-ray diffraction (XRD), scanning electron microscopy (SEM) and micro-Raman spectroscopy, have confirmed the perovskite structure of the synthesized nanomaterials. To study the effects of Nd and Sm lanthanides substitution at the A-site on the chemical sensing performance, conductometric and electrochemical sensors based on the synthesized LnFeO3 samples were fabricated. LnFeO3-based conductometric and electrochemical sensors were tested for acetone and dopamine sensing, respectively. The data revealed that Nd and Sm in the A-position lead to a significant influence in the gas sensing and electrochemical properties of perovskite LnFeO3 samples. In particular, it has been demonstrated the good gas sensing characteristics of SmFeO3 for acetone gas (Response=R/R0=8.3–20 ppm acetone at 200 °C), whereas NdFeO3 displayed better performance as electrode for the electrochemical detection of dopamine reaching a low detection limit (LOD) of 270 nM at S/N = 3. The electrical and electrochemical characteristics of the perovskite LnFeO3 samples were discussed in detail with respect to their chemical composition and microstructure.