One-step synthesis and highly gas-sensing properties of hierarchical Cu-doped SnO2 nanoflowers

Jin, Wei; Ma, S.Y.; Tie, Zuoxiu; Wei, Jinxin; Luo, Jing; Jiang, Xiaoxue; Wang, T.T.; Li, W.Q.; Cheng, Liang; Mao, Y.Z.

doi:10.1016/j.snb.2015.02.075

Cited by 99 publications

(31 citation statements)

References 53 publications

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“…Yin et al [7] explored the preparation of dual sensors with (Pd, Fe)-modified SnO 2 and Pt-loaded SnO 2 for improving the gas selectivity, which could detect and calculate the respective concentrations of CO and H 2 in the mixed gas. Jin et al [8] studied that SnO 2 -based nanostructure by 2.5% doped Cu reached sensitivity of 221 for 500 ppm acetone and increased selectivity between acetone and ammonia, and the corresponding response and recovery times are 9 s and 6 s, respectively. Additionally, Mahdavian et al [9] and Prades et al [10] further clarified the interaction of SnO 2 -based sensors with different kinds of target gases and through simulation calculations.…”

Section: Introductionmentioning

confidence: 99%

Influence of Charge Carriers Concentration and Mobility on the Gas Sensing Behavior of Tin Dioxide Thin Films

Zhou

Sun

et al. 2019

Coatings

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In order to investigate function of carrier behavior on gas-sensing properties, tin oxide-based films with different carrier concentration and mobility were obtained, by magnetron sputtering from the powder target, which was followed by further oxygen-management though the annealing treatment. The microstructure, surface morphology, electrical properties and gas sensitivity were characterized by XRD, Raman spectrum, photoluminescence spectrum, atomic force microscope, the hall effect system and electrochemical workstation, respectively. The results showed that all SnO2-based films had a tetragonal rutile phase with (101) preferred orientation. The introduction of fluorine and regulation of oxygen vacancies tuned carrier concentration from 1015/cm3 to 1021/cm3 and mobility from 102 cm2/V·s to 10−1 cm2/V·s. The decreasing carrier concentration as well as increasing mobility had a positively important function to improve the sensitivity of SnO2-based films. The air-annealed SnO2 film with lowest carrier concentration had a maximum sensitivity of R = 5.0, while vacuum-annealed SnO2:F film with the highest carrier concentration being the minimum sensitivity. This puts forward a novel reference for the design and application of SnO2-based gas sensing films.

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Section: Introductionmentioning

confidence: 99%

Influence of Charge Carriers Concentration and Mobility on the Gas Sensing Behavior of Tin Dioxide Thin Films

Zhou

Sun

et al. 2019

Coatings

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“…In recent work it was found that a mixed CuO/SnO 2 material performed even better than the pure tin dioxide for H 2 S sensing and still retained chemical stability and high sensitivity at low cost [30–34]. It has been suggested [30,31] that copper improves the sensor performance by increasing the concentration of surface active sites and decreasing the crystalline size of SnO 2 ; alternatively, the introduction of H 2 S may destroy the p-n junction between CuO and SnO 2 by forming CuS, therefore improving the sensing ability [34,35]. Moreover, oxygen is still needed to recover this material following H 2 S exposure, meaning that this sensor can only operate in oxygen-rich conditions.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the H2S poisoning process for sensing composite material based on carbon nanotubes and metal oxides

Duan

Pirolli

Teplyakov

2016

Sensors and Actuators B: Chemical

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The poisoning of H2S sensing material based on the mixture of acid-treated carbon nanotubes, CuO and SnO2 was investigated by exposing the material to high doses of H2S (1% in volume) and following the changes spectroscopically. The presence of metal sulfides (CuS and SnS2), sulfates and thiols was confirmed on the surface of this material as the result of H2S poisoning. Further study revealed that leaving this material in air for extended period of time led to reoxidation of metal sulfides back to metal oxides. The formation of thiols and sulfates directly on carbon nanotubes is not reversible under these conditions; however, the extent of the overall surface reaction in this case is substantially lower than that for the composite material.

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“…The response of the sensor defined as S = R a /R g , where R a and R g represented the initial resistance of sensor in air and the target gas, respectively. The response time could be defined as the time needed to reach 90% of its saturated pulse height, while the recovery time was the time needed for the pulse to reach 10% from its base line [8]. indicates the high purity of our product.…”

Section: Methodsmentioning

confidence: 99%

Enhanced acetone sensing performance of monodisperse porous hamburger-like α-Fe2O3 microparticles

Jin

Tie

et al. 2015

Materials Letters

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One-step synthesis and highly gas-sensing properties of hierarchical Cu-doped SnO2 nanoflowers

Cited by 99 publications

References 53 publications

Influence of Charge Carriers Concentration and Mobility on the Gas Sensing Behavior of Tin Dioxide Thin Films

Influence of Charge Carriers Concentration and Mobility on the Gas Sensing Behavior of Tin Dioxide Thin Films

Investigation of the H2S poisoning process for sensing composite material based on carbon nanotubes and metal oxides

Enhanced acetone sensing performance of monodisperse porous hamburger-like α-Fe2O3 microparticles

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