Ethanol sensors based on Pt-doped tin oxide nanopowders synthesised by gel-combustion

Neri, G.; Bonavita, A.; Micali, Giuseppe; Donato, Nicola; Deorsola, Fabio Alessandro; Mossino, P.; Amato, I.; Benedetti, Bruno

doi:10.1016/j.snb.2005.11.032

Cited by 100 publications

(33 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The sensing mechanism can be explained as follows [29][30][31]. When TiO 2 nanofibers are exposed to the air, the O 2 molecules adsorbed on the surface will generate active oxygen species and result in the formation of the surface depletion region.…”

Section: Resultsmentioning

confidence: 99%

Improved and excellent CO sensing properties of Cu-doped TiO2 nanofibers

Wang

Zhao

et al. 2010

Chin. Sci. Bull.

View full text Add to dashboard Cite

Cu-doped TiO 2 nanofibers with an average diameter of about 80 nm are synthesized through an electrospinning method. Both anatase and rutile crystallographic structures are found in the fibers based on XRD results. Compared with pure TiO 2 nanofibers, the Cu-doped TiO 2 nanofibers exhibit improved CO sensing properties at 300°C. The sensitivity of Cu-doped TiO 2 nanofibers is up to 3 when the sensor is exposed to 5 ppm CO, and the response and recovery times are about 4 and 8 s, respectively. Good selectivity is also observed in our investigations. These results indicate that the Cu-doped TiO 2 nanofibers can be used to fabricate high performance CO sensors in practice. CO, nanomaterials, metal oxide semiconductors, gas sensors, chemical sensorsCitation: Wang B, Zhao Y D , Hu L M, et al. Improved and excellent CO sensing properties of Cu-doped TiO 2 nanofibers.The gas sensor, as an important field in chemical sensors, gains considerable attention driven by its practical applications in monitoring and control of air quality, detection of flammable or toxic gases, medical diagnosis, and optimization of combustion efficiency [1][2][3][4][5][6]. Based on their high response value, fast response, quick recovery, excellent stability and simplicity in fabrication, metal-oxide semiconductors (MOS) have been widely chosen as the sensing materials for gas sensors over the last forty years [7-10]. MOS nanoparticles with small sizes exhibit high sensitivity to the detected gases, but their sensing properties often suffer from degradation because of the aggregation growth among MOS nanoparticles. In recent years, one-dimensional (1D) MOS nanostructures have received considerable attention because they avoid such degradation. On the other hand, the large surface-to-volume ratio of 1D MOS nanostructures and the congruence of the carrier screening length with their lateral dimensions make them highly sensitive and efficient transducers of surface chemical processes into electrical signals. Hitherto, impressive and promising results regarding the synthesis, fabrication, chemical and physical properties of these 1D nanostructures have been achieved [11][12][13]. TiO 2 is an important MOS with a variety of applications in environmental cleaning and protection, photocatalysis, solar cells, and chemical/physical sensors [14][15][16][17][18]. For gas sensors, TiO 2 is proven to be a highly sensitive material for the detection of both reducing and oxidizing gases. Many scientific and technological efforts have been put on improving the sensing performance based on the TiO 2 gas sensors, such as adding catalysts, doping metals and metal oxides, decreasing grain size, controlling pore and surface defects, etc. Among these methods, doping metals or metal oxides (such as Al, La, Nb, Cu, ZnO and SnO 2 ) on TiO 2 have been proved to be a simple and efficient route to enhance the sensing properties [19,20]. However, to the best of our knowledge, few papers on the doped 1D TiO 2 gas sensors have been reported. On the other hand, the fabricatio...

show abstract

Section: Resultsmentioning

confidence: 99%

Improved and excellent CO sensing properties of Cu-doped TiO2 nanofibers

Wang

Zhao

et al. 2010

Chin. Sci. Bull.

View full text Add to dashboard Cite

show abstract

“…The activation energy is sensitive to the temperature so that E a is higher in high temperature regime as compared lower regime as shown in Fig.8. The A 6 sample exhibits higher value of activation energy about E A =0.58eV and 0.37eV at higher and lower temperature regime respectively while all other samples exhibit lesser values due to their higher grain size [30] [31]and are comparable to the values reported [32]. …”

Section: Ijasr|vol 01|issue 10|2015mentioning

confidence: 92%

Effect of grain size and temperature on DC electrical conductivity of tin oxide nanoparticles synthesized by gel combustion method

Jayanna

Rajeeva

Naveen

et al. 2015

Int J of Adv in Sci Res

View full text Add to dashboard Cite

Tin oxide (SnO 2 ) nanomaterials of different grain size have been prepared using gel combustion method by varying the fuel (C 6 H 8 O 7 ) to oxidizer (HNO 3 ) molar ratio as a process parameter. The prepared samples were characterized by using X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM) and Energy Dispersive Analysis X-ray Spectroscope (EDAX). The XRD patterns showed the formation of single phase Tetragonal rutile structure. The average particle size is found to be in the range of 19-34 nm. SEM images show high porosity in the material. The DC electrical conductivity of SnO 2 thick film increases with the temperature significantly from 308K to 670K.The DC electrical conductivity of SnO 2 thick film decreases with decrease in grain size due to the effect of surface to volume ratio while activation energy increases with decrease of grain size .

show abstract

“…Pt enhances the adsorption and dissociation of molecular oxygen on semiconductor surfaces due to its peculiar catalytic properties. The surface species trap electrons from the metal oxide conduction band, increasing the resistance of the doped sample [97].…”

Section: Comini Et Al Deposited Sno 2 Nanobelts On Platinum Interdigmentioning

confidence: 99%

Conductometric Gas Nanosensors

2009

View full text Add to dashboard Cite

This paper presents a review of the current research activities in the field of gas nanosensors. Nanomaterials are characterized by physical and chemical properties that differ from their macroscopic counterparts and, in particular, by an enhanced chemical reactivity even at room temperature. This effect has stimulated the development of chemical sensors based on several different nanomaterials. Here we focus most attention on carbon nanotubes, silicon and metal oxide nanoparticles and metal nanowires. After introducing a few general definitions a discussion on the fundamental properties of the nanostate used in the sensor field is presented and several nanosensors, based on the aforementioned nanomaterials, are discussed. Finally, some personal conclusions will be drawn.

show abstract

Ethanol sensors based on Pt-doped tin oxide nanopowders synthesised by gel-combustion

Cited by 100 publications

References 21 publications

Improved and excellent CO sensing properties of Cu-doped TiO2 nanofibers

Improved and excellent CO sensing properties of Cu-doped TiO2 nanofibers

Effect of grain size and temperature on DC electrical conductivity of tin oxide nanoparticles synthesized by gel combustion method

Conductometric Gas Nanosensors

Contact Info

Product

Resources

About