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Effect of morphology, structure and chemical composition on gas-sensing response of thermally modified Fe2O3/CoxOy/NiO composites
Sokolov D.V.
1, Nesov S. N.
1, Stenkin Y.A.
1, Bolotov V.V.
1, Ivlev K.E.
1, Muromtsev I.V.2
1Omsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Omsk, Russia
2Center of New Chemical Technologies BIC, Siberian Branch, Russian Academy of Sciences, Omsk, Russia
2Center of New Chemical Technologies BIC, Siberian Branch, Russian Academy of Sciences, Omsk, Russia
Email: classicsub-zero@mail.ru
Composites of Fe2O3/CoxOy/NiO were prepared by thermal decomposition with next annealing to modify the morphology, structure and chemical composition. With increasing annealing temperature, the average particle size was increased from 0.11 to 1.00 μm, and the CoO/NiO ratios concentration and Fe, Co, and Ni-containing spinels were changed. Selectivity of the obtained composites to saturated mercury vapor, 500 ppm H2S and SO2 at room temperature was demonstrated by a gas sensing study to inorganic gases and organic vapors at various heat treatment temperatures of samples. Keywords: transition metal oxides, heat treatment, gas response, mercury vapor.
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