Xylene gas sensor based on Ni doped TiO<sub>2</sub> bowl-like submicron particles with enhanced sensing performance

Zhu, Linghui; Zhang, Dezhong; Wang, Ying; Feng, Chuang; Zhou, Jingran; Liu, Caixia

doi:10.1039/c5ra01395j

Cited by 45 publications

(22 citation statements)

References 26 publications

(25 reference statements)

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“…Hence, we studied the effects of calcination on gas sensing properties of WO 3 lamellae. [38][39][40] The recovery time (s rec ) exposures to 100 ppm xylene were about 24 s, 18 s, 17 s, 15 s for WO 3 annealed at 300 C 400 C, 500 C, 600 C. The response time of the sensors is obviously shorter than the recovery time, which indicates that the adsorption of xylene gas and its subsequent reduction are generally shorter than desorption and diffusion of the product gases. 6 shows the response of WO 3 nanolamella gas sensors annealed at different temperatures to 100 ppm xylene at different operating temperatures.…”

Section: Gas-sensing Propertiesmentioning

confidence: 97%

Low-temperature synthesis of WO₃ nanolamella and their sensing properties for xylene

Feng

Jing

et al. 2015

RSC Adv.

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Tungsten trioxides (WO 3 ) are an important class of n-type semiconductor oxide materials with a wide bandgap. In this work, nanolamella of tungsten oxides have been successfully synthesized by a simple, facile and cost-effective route starting from Na 2 WO 4 and subsequent calcination at 300 C. The structure and morphology of the nanolamella were characterized by X-ray diffraction (XRD) scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR) and photoluminescence (PL), respectively. The morphologies of the prepared products can be tailored by changing the calcination temperature. The obtained WO 3 products were investigated as sensitive materials for the detection of xylene. On the basis of gas sensing tests, the sensor using WO 3 nanolamella after annealing at 300 C for 2 h exhibited better gas sensing properties. The maximum response reached 47 to 100 ppm of xylene at 280 C. These results indicated that the gas sensors based on WO 3 nanolamella express high and fast response and recovery characteristics to xylene, and the WO 3 nanolamella are promising sensitive materials for xylene detecting.

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Section: Gas-sensing Propertiesmentioning

confidence: 97%

Low-temperature synthesis of WO₃ nanolamella and their sensing properties for xylene

Feng

Jing

et al. 2015

RSC Adv.

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“…Therefore, anatase TiO 2 seems to be the less suitable candidate for wide use as a high-temperature H 2 sensor. Previous studies have reported that this disadvantage can be overcome by suitably doping the TiO 2 [ 21 , 22 , 23 , 24 , 25 , 26 ]. Another main drawback of a resistive semiconductor metal oxide-based sensor such as TiO 2 is selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…It is already known that doping is an effective way to improve the gas-sensing properties of sensors based on metal oxide semiconductors. Several works report the effect of Ni doping on TiO 2 sensing properties at low temperatures (<350 °C) [ 22 , 25 , 33 ]. In fact, substituting Ti by Ni, depending on the synthesis method, could change the conductivity type, inducing effective reduction in the bandgap of anatase titanium dioxide.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Hydrogen Sensing Performance of Ni-Doped TiO2 Prepared by Co-Precipitation Method

Fomekong

Kelm

Saruhan

2020

Sensors

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This work deals with the substantially high-temperature hydrogen sensors required by combustion and processing technologies. It reports the synthesis of undoped and Ni-doped TiO2 (with 0, 0.5, 1 and 2 mol.% of Ni) nanoparticles by a co-precipitation method and the obtained characteristics applicable for this purpose. The effect of nickel doping on the morphological variation, as well as on the phase transition from anatase to rutile, of TiO2 was investigated by scanning electron microscopy, X-ray diffraction and Raman spectroscopy. The resistive sensors prepared with these powders were tested toward H2 at 600 °C. The results indicate that 0.5% Ni-doped TiO2 with almost equal amounts of anatase and rutile shows the best H2 sensor response (ΔR/R0 = 72%), response rate and selectivity. The significant improvement of the sensing performance of 0.5% Ni-doped TiO2 is mainly attributed to the formation of the highest number of n-n junctions present between anatase and rutile, which influence the quantity of adsorbed oxygen (i.e., the active reaction site) on the surface and the conductivity of the material.

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“…Thus, the detection and measurement of xylene are important. Hitherto, various methods, such as gas chromatography, optical waveguides, optical planar Bragg grating sensors, chemical sensors, biosensors, and magneto‐elastic sensors, have been used to detect xylene. Chemical sensors based on metal oxide semiconductors are particularly appealing because of their excellent sensing performance, ease of fabrication, simple operation, low production costs, portability, and miniaturization.…”

Section: Introductionmentioning

confidence: 99%

Au‐nanoparticle‐decorated SnO₂ nanorod sensor with enhanced xylene‐sensing performance

Feng

Teng

et al. 2017

Int J Applied Ceramic Tech

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In this work, pure and Au‐nanoparticle‐decorated SnO2 nanorods were prepared via a one‐step hydrothermal method combined with a facile deposition process, and then characterized by X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, high‐resolution transmission electron microscopy, and X‐ray photoelectron spectroscopy. The xylene‐sensing performance of the nanorods was also investigated. The results show that Au nanoparticles with an average diameter of 4‐6 nm were immobilized on the surface of rutile SnO2 nanorods. As the amount of Au increased, the surface‐adsorbed oxygen species gradually increased. The 12 mol% Au‐SnO2 nanorods exhibited the highest response to 50 ppm xylene, a lower operating temperature (279 to 255°C), favorable selectivity, and fast response‐recovery speed (3 and 4 seconds, respectively). These properties made the fabricated nanorods good candidates for xylene detection. The possible mechanism for the enhanced xylene‐sensing performance is discussed.

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Xylene gas sensor based on Ni doped TiO₂ bowl-like submicron particles with enhanced sensing performance

Abstract: Bowl-like TiO2 submicron particles prepared by electrospray technique were used to detect xylene gas and Ni element was added into TiO2 to improve the gas sensing performances.

Cited by 45 publications

References 26 publications

Low-temperature synthesis of WO₃ nanolamella and their sensing properties for xylene

Low-temperature synthesis of WO₃ nanolamella and their sensing properties for xylene

High-Temperature Hydrogen Sensing Performance of Ni-Doped TiO2 Prepared by Co-Precipitation Method

Au‐nanoparticle‐decorated SnO₂ nanorod sensor with enhanced xylene‐sensing performance

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Xylene gas sensor based on Ni doped TiO2 bowl-like submicron particles with enhanced sensing performance

Abstract: Bowl-like TiO2 submicron particles prepared by electrospray technique were used to detect xylene gas and Ni element was added into TiO2 to improve the gas sensing performances.

Cited by 45 publications

References 26 publications

Low-temperature synthesis of WO3 nanolamella and their sensing properties for xylene

Low-temperature synthesis of WO3 nanolamella and their sensing properties for xylene

High-Temperature Hydrogen Sensing Performance of Ni-Doped TiO2 Prepared by Co-Precipitation Method

Au‐nanoparticle‐decorated SnO2 nanorod sensor with enhanced xylene‐sensing performance

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Xylene gas sensor based on Ni doped TiO₂ bowl-like submicron particles with enhanced sensing performance

Low-temperature synthesis of WO₃ nanolamella and their sensing properties for xylene

Low-temperature synthesis of WO₃ nanolamella and their sensing properties for xylene

Au‐nanoparticle‐decorated SnO₂ nanorod sensor with enhanced xylene‐sensing performance