Synthesis and gas sensing properties of nanostructured CoSb2O6 microspheres

Michel, Carlos R.; Guillén-Bonilla, Héctor; Martínez-Preciado, Alma H.; Morán-Lázaro, Juan Pablo

doi:10.1016/j.snb.2009.09.041

Cited by 16 publications

(31 citation statements)

References 26 publications

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“…Some authors report the obtention of morphologies similar to those here reported, which originate from the growth process of stable nuclei of the colloidal systems [28,29]. These morphologies are in agreement with the crystallization principles proposed by LaMer and Dinegar [9,24,27,30]. …”

Section: Resultssupporting

confidence: 90%

“…The estimated crystal size according to the Scherrer equation [19] for the CoSb 2 O 6 powders was around 41 nm. Furthermore, low intensity peaks identified through the ICDD 87234 file, reveal a secondary phase: Co 2.33 Sb 0.67 O 4 [9], localized on the angular positions 2θ = 17.8°, 2θ = 29.5°, 2θ = 36.2°, and 2θ = 42°.…”

Section: Resultsmentioning

confidence: 99%

“…The trirutile-type structure CoSb 2 O 6 oxide was synthesized based on the procedure described in [8,9]. However, in this work, these reagents were used: SbCl 3 (Sigma-Aldrich), Co(NO 3 ) 2 ·6H 2 O (Mallinckrodt), 1 mL of ethylenediamine, and 5 mL of ethanol (Golden Bell).…”

Section: Methodsmentioning

confidence: 99%

“…Such materials show interesting sensing properties, remaining at the same time chemically stable in the presence of polluting gases. In recent years, oxides with a trirutile-type structure, like CoSb 2 O 6 [8,9] and ZnSb 2 O 6 [10,11], are being studied for gas-sensing applications with very good results. These results are mainly attributed to the nano-sized structure of the trirutile oxides, which therefore determines the best synthesis process (route) to produce them [9].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, oxides with a trirutile-type structure, like CoSb 2 O 6 [8,9] and ZnSb 2 O 6 [10,11], are being studied for gas-sensing applications with very good results. These results are mainly attributed to the nano-sized structure of the trirutile oxides, which therefore determines the best synthesis process (route) to produce them [9]. The ceramic method for the synthesis of oxides has been extensively used; however, this conventional process involves some disadvantages, for instance, it is necessary to heat the sample at elevated temperatures for a long time.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Response of CoSb2O6 Trirutile-Type Oxides in a CO2 Atmosphere at Low-Temperatures

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Experimental work on the synthesis of the CoSb 2 O 6 oxide and its CO 2 sensing properties is presented here. The oxide was synthesized by a microwave-assisted colloidal method in presence of ethylenediamine after calcination at 600 °C. This CoSb 2 O 6 oxide crystallized in a tetragonal structure with cell parameters = 4.6495 and = 9.2763 Å, and space group P4 2 /mnm. To prove its physical, chemical and sensing properties, the oxide was subjected to a series of tests: Raman spectroscopy, Scanning Electron Microscopy (SEM) and impedance (Z) measurements. Microstructures, like columns, bars and hollow hemispheres, were observed. For the CO 2 sensing test, a thick film of CoSb 2 O 6 was used, measuring the impedance variations on the presence of air/CO 2 flows (0.100 sccm/0.100 sccm) using AC (alternating current) signals in the frequency-range OPEN ACCESSSensors 2014, 14 15803 0.1-100 kHz and low relative temperatures (250 and 300 °C). The CO 2 sensing results were quite good.

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