SnO2 nanocrystals with abundant oxygen vacancies: Preparation and room temperature NO2 sensing

Wei, Yu‐Ling; Chen, Changlong; Yuan, Guangzheng; Gao, Shuai

doi:10.1016/j.jallcom.2016.04.220

Cited by 103 publications

(30 citation statements)

References 29 publications

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“…In most cases, for this purpose, the n-type semiconductors such as SnO 2 [14][15][16][17][18][19][20], ZnO [21][22][23][24][25][26], WO 3 [27][28][29][30][31][32], In 2 O 3 [33,34], and TiO 2 [35] are used traditionally. In recent years, the search of the materials, which would be capable to lower the detection limit of oxidizing gases, became more active.…”

Section: Novel Nanomaterials -Synthesis and Applicationsmentioning

confidence: 99%

Palladium (II) Oxide Nanostructures as Promising Materials for Gas Sensors

Samoylov¹,

Ryabtsev²,

Popov³

et al. 2018

Novel Nanomaterials - Synthesis and Applications

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One of the most important environment monitoring problems is the detection of oxidizing gases in the ambient air. Negative impact of noxious oxidizing gases (ozone and nitrogen oxides) on human health, sensitive vegetation, and ecosystems is very serious. For this reason, palladium (II) oxide nanostructures have been employed for oxidizing gas detection. Thin and ultrathin films of palladium (II) oxide were prepared by thermal oxidation at dry oxygen of previously formed pure palladium layers on polished poly-Al 2 O 3 , SiO 2 /Si (100), optical quality quartz, and amorphous carbon/KCl substrates. At ozone and nitrogen dioxide detection, PdO films prepared by oxidation at T = 870 K have demonstrated good values of sensitivity, signal stability, operation speed, and reproducibility of sensor response. In comparison with other materials, palladium (II) oxide thin and ultrathin films have some advantages at gas sensor fabrication. Firstly, for oxidizing gas detection, PdO films with p-type conductivity are more perspective than the material with n-type conductivity. Secondly, at ambient conditions, palladium (II) oxide is insoluble in water and does not react with it. These facts are favorable for the fabrication of gas detectors because they make possible to minimize the air humidity influence on PdO sensor response values. Thirdly, the synthesis procedure of PdO films is rather simple and is compatible with planar processes of microelectronic industry.

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Section: Novel Nanomaterials -Synthesis and Applicationsmentioning

confidence: 99%

Palladium (II) Oxide Nanostructures as Promising Materials for Gas Sensors

Samoylov¹,

Ryabtsev²,

Popov³

et al. 2018

Novel Nanomaterials - Synthesis and Applications

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“…No other impurity peaks can be found in the XRD patterns, indicating that the as‐synthesized SnO 2 nanomaterials are high purity. The mean sizes of the as‐prepared samples were calculated from the width of (110) peak by using Debye‐Scherrer equation:

true D = 0.89 λ / (β \cdot prefixcos θ)

…”

Section: Resultsmentioning

confidence: 99%

“…The O 1s spectra of RTT and IWBT are presented in Figure c and d, respectively. It is obvious that the two O 1s spectra are composed of O L peak centered at 530.8 eV, O V peak centered at 531.4 eV and O C peak centered at 532.6 eV, where O L is the Sn‐O−Sn lattice oxygen in SnO 2 structure, O V is the oxygen vacancy and O C is the chemisorbed oxygen (OH − , O − and O 2 − ). As it can be seen from Table , the relative percentage of O V peak areas for IWBT (53.3%) is higher than that of RTT (47.0%), indicating that the oxygen vacancy content of IWBT is more than that of RTT.…”

Section: Resultsmentioning

confidence: 99%

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Oxygen Vacancies Enhance Triethylamine Sensing Properties of SnO₂ Nanoparticles

Meng

Yao

et al. 2019

ChemistrySelect

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In this paper, tin oxide (SnO2) nanoparticles with abundant oxygen vacancies (OVs) (designated as IWBT) were synthesized via a combined hydrothermal route and ice‐water bath stirring method. In addition, another SnO2 nanoparticles (designated as RTT) were prepared by the room temperature stirring synthesis and subsequent hydrothermal process. The morphology and composition of the as‐obtained samples were characterized by X‐ray diffraction (XRD), field‐emission scanning electron microscopy (FESEM), X‐ray photoelectron spectroscopy (XPS) and Brunauer‐Emmett‐Teller (BET) analysis. It was found that IWBT contained much more surface oxygen vacancies defects than RTT. The synthesized IWBT exhibited outstanding gas sensing properties toward triethylamine (TEA) at 260 °C, such as high response, significant selectivity, low detection limit and excellent repeatability. According to the results of experiments, the response of as‐prepared IWBT sensor could reach to 2701.36 when exposed to 500 ppm TEA, which was far higher than the as‐prepared RTT sensor (748.10). The excellent sensing characteristics of IWBT could be attributed to the abundant OVs that could improve the O2 adsorptivity and electron transfer capability of SnO2. Thus, IWBT supplied a rational strategy to enhance the gas sensing performances of TEA gas sensors.

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“…They are usually recognized as the most economic materials as gas sensors, such as high sensitivity, fast response and recovery, low detection limits, low fabrication cost, simplicity in fabrication, measurement, and function durability compared to other semiconductors [4]. For example, SnO 2 [5], ZnO [6], In 2 O 3 [7], NiO [8], WO 3 [9], CuO [10], CeO 2 [11] and TiO 2 [12,13] are very common MOS and widely applied in various gas detection. Vanadium oxide, as an n-type semiconductor with a band gap of 2.2 eV, has received large amounts of attention in the past few years.…”

Section: Introductionmentioning

confidence: 99%

Enhanced 1-butylamine gas sensing characteristics of flower-like V2O5 hierarchical architectures

Yang

Xiao

et al. 2017

Journal of Alloys and Compounds

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Vanadium oxide hierarchical architectures have been successfully synthesized using a facile hydrothermal method. The as-prepared V 2 O 5 hierarchical architectures are assembled by nanobelts and present a unique radial flower-like morphology. The as-prepared V 2 O 5 hierarchical structures are used for organic polluted and toxic gas 1-butylamine gas detection. The gas sensors based on V 2 O 5 hierarchical architectures present excellent 1-butylamine gas sensing performances. Such as a fast response time (9 s), high sensitivity, good selectivity and superior repeatability, all these properties are predominantly-attributed to the unique nanobelt-assembled radial flower-like structure and ammonium ions intercalation. The obtained V 2 O 5 hierarchical architectures will hold promising potential in the fabrication of efficient and effective 1-butylamine gas sensors for practical applications.

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SnO2 nanocrystals with abundant oxygen vacancies: Preparation and room temperature NO2 sensing

Cited by 103 publications

References 29 publications

Palladium (II) Oxide Nanostructures as Promising Materials for Gas Sensors

Palladium (II) Oxide Nanostructures as Promising Materials for Gas Sensors

Oxygen Vacancies Enhance Triethylamine Sensing Properties of SnO₂ Nanoparticles

Enhanced 1-butylamine gas sensing characteristics of flower-like V2O5 hierarchical architectures

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SnO2 nanocrystals with abundant oxygen vacancies: Preparation and room temperature NO2 sensing

Cited by 103 publications

References 29 publications

Palladium (II) Oxide Nanostructures as Promising Materials for Gas Sensors

Palladium (II) Oxide Nanostructures as Promising Materials for Gas Sensors

Oxygen Vacancies Enhance Triethylamine Sensing Properties of SnO2 Nanoparticles

Enhanced 1-butylamine gas sensing characteristics of flower-like V2O5 hierarchical architectures

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Product

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Oxygen Vacancies Enhance Triethylamine Sensing Properties of SnO₂ Nanoparticles