Evidence of improvement in gas sensing properties of nanostructured bismuth cobaltite prepared by solution-polymerization method

Michel, Carlos R.; Delgado, Emilio; Martínez, Alma H.

doi:10.1016/j.snb.2007.02.031

Cited by 15 publications

(9 citation statements)

References 32 publications

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“…These results of the changing resistance value and the conductivity variation of the semiconductor can be consulted in [35]. Due to this, the conductivity strongly depends on the size of the crystal ( D ), thus giving rise to three possible scenarios [36]:

If D ≫ 2 L S , the conductivity is limited by the Schottky barrier at the particle border; thus, the gas detection does not depend on the crystal size ( D ),

If D = 2 L S , the conductivity and the gas sensing depend on necks formed by the crystals, and

If D < 2 L S , the conductivity depends on the crystal size [36,37].

…”

Section: Resultsmentioning

confidence: 99%

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

Guillén-Bonilla

Rodríguez-Betancourtt

Flores

et al. 2014

Sensors

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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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If D ≫ 2 L S , the conductivity is limited by the Schottky barrier at the particle border; thus, the gas detection does not depend on the crystal size ( D ),

If D = 2 L S , the conductivity and the gas sensing depend on necks formed by the crystals, and

If D < 2 L S , the conductivity depends on the crystal size [36,37].

…”

Section: Resultsmentioning

confidence: 99%

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

Guillén-Bonilla

Rodríguez-Betancourtt

Flores

et al. 2014

Sensors

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“…According to some authors (e.g., [55]), the charged outer layer mainly depends on the gas pressure and concentrations. Owing to this, the conductivity will strongly depend on the crystal size ( ), yielding three possible scenarios [18]: (1) if ≫ 2 , the conductivity is limited by the Schottky barrier at the particle border; thus, the gas detection does not depend on the particle size; (2) if = 2 , the conductivity and the gas sensing properties depend on the formation of necks built by crystals; (3) if < 2 , the conductivity depends on the crystal size [18,20,55]. Based on these three scenarios, the known physical fact that the smaller the particle size (accomplished in our case during the synthesis process), the greater the surface area obtained can be neatly used in the gas sensors field.…”

Section: Journal Of Nanomaterialsmentioning

confidence: 99%

Sensitivity of Mesoporous CoSb₂O₆ Nanoparticles to Gaseous CO and C₃H₈ at Low Temperatures

Guillén-Bonilla

Gildo-Ortiz

Olvera

et al. 2015

Journal of Nanomaterials

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Mesoporous CoSb2O6nanoparticles, synthesized through a nonaqueous method (using cobalt nitrate, antimony trichloride, ethylenediamine, and ethanol as a solvent), were tested to establish their sensitivity to CO and C3H8atmospheres at relatively low temperatures. The precursor material was dried at 200°C and calcined at 600°C. X-ray diffraction and scanning electron microscopy were employed to verify the existence of crystal phases (P42/mnm) and the morphology of this trirutile-type CoSb2O6oxide. Pyramidal and cubic shaped crystals (average size: 41.1 nm), embedded in the material’s surface, were identified. Mesopores (average size: 6.5 nm) on the nanoparticles’ surface were observed by means of transmission electron microscopy. The best sensitivity of the CoSb2O6in a CO atmosphere was at the relatively low temperatures of 250 and 350°C, whereas, in a C3H8atmosphere, the sensitivity increased uniformly with temperature. These results encourage using the CoSb2O6nanoparticles as gas sensors.

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“…63 Additionally, sillenite structured bismuth-based material was prepared by solid-state reaction, and was found to be composed of many surface active sides for gas adsorption. 67,68 Overall, perovskite material has been recognised as highly stable, and all bismuth ferrite-based compositions exhibited comparatively high operating temperatures for gas sensing. However, loading/doping of materials such as Pd, W, and La have displayed reduction in operating temperature below 150°C.…”

Section: Bismuth Ferrite-based Gas Sensormentioning

confidence: 99%

Bismuth-Based Gas Sensors: A Comprehensive Review

Ghuge

Shinde

Rane

2021

J. Electron. Mater.

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Development of highly sensitive, stable and reliable eco-friendly gas sensors is still an open-ended research domain and thus demands many related materials. Bismuth-based compounds form an important material platform in such developments; however, they are so far not reviewed. This review highlights the detailed gas sensing attributes for a range of gases and humidity for n-type and p-type as well as mixed composite materials and influences of catalytic doping on gas sensing in different bismuth-based composites. The future scope in the development of such gas sensors leading to commercialization is also discussed.

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Evidence of improvement in gas sensing properties of nanostructured bismuth cobaltite prepared by solution-polymerization method

Cited by 15 publications

References 32 publications

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

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

Sensitivity of Mesoporous CoSb₂O₆ Nanoparticles to Gaseous CO and C₃H₈ at Low Temperatures

Bismuth-Based Gas Sensors: A Comprehensive Review

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Evidence of improvement in gas sensing properties of nanostructured bismuth cobaltite prepared by solution-polymerization method

Cited by 15 publications

References 32 publications

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

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

Sensitivity of Mesoporous CoSb2O6 Nanoparticles to Gaseous CO and C3H8 at Low Temperatures

Bismuth-Based Gas Sensors: A Comprehensive Review

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Sensitivity of Mesoporous CoSb₂O₆ Nanoparticles to Gaseous CO and C₃H₈ at Low Temperatures