Oxygen vacancy-based Tb-doped SnO2 nanotubes as an ultra-sensitive sensor for ethanol detection

Wang, Li; Ma, S.Y.; Xu, Xiaoli; Li, Jianpeng; Yang, Tingting; Cao, Pengfei; Yun, Pengdou; Wang, Shengyi; Han, Ting

doi:10.1016/j.snb.2021.130111

Cited by 64 publications

(16 citation statements)

References 54 publications

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“…A strong feature at approximately 3000–3600 cm –1 is attributed to −NH. , Impressively, in contrast to pure g-C 3 N 4 , the broad peak at approximately 1950 cm –1 of SnO 2 @g-C 3 N 4 is attributed to the SnN bond, indicating that the SnO 2 clusters are anchored into g-C 3 N 4 via the SnN bond . Another set of characteristic vibration peaks are observed between 567 and 640 cm –1 , which can be assigned to SnO bond of SnO 2 . − These results are consistent with HRTEM and XPS analyses. N 2 adsorption–desorption isotherms of the g-C 3 N 4 and SnO 2 @g-C 3 N 4 are shown in Figure b,c, and the pore diameters of g-C 3 N 4 and SnO 2 @g-C 3 N 4 are 2.65 and 2.35 nm, respectively.…”

Section: Resultssupporting

confidence: 74%

Tensile Strain in Tin Oxide Clusters Stabilized by C₃N₄ for Highly Efficient Visible Light-Driven H₂O₂ Production

Zhang

Song

et al. 2022

ACS Sustainable Chem. Eng.

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Photocatalytic synthesis of H 2 O 2 , as a potential alternative to the industrial anthraquinone process, does not require additional energy input and is a nontoxic and pollution-free process, which has attracted widespread attention. Herein, we successfully anchored the SnO 2 clusters into the g-C 3 N 4 through the Sn−N bond (SnO 2 @g-C 3 N 4 ) as a highly efficient photocatalyst for visible lightdriven H 2 O 2 production. Because of the existence of the Sn−N bond, the thickness of the SnO 2 @g-C 3 N 4 material is thinner, and the lattice spacing of SnO 2 is stretched, achieving an excellent photocatalytic hydrogen peroxide production rate of 1021.15 μmol g −1 h −1 , which is 58-fold more than that of the original g-C 3 N 4 . Moreover, the turnover frequency of SnO 2 @g-C 3 N 4 (1.7 min −1 ) has a huge advantage of 57 times compared with that of the original g-C 3 N 4 . The outstanding photocatalytic activity is attributed to the lattice tensile of SnO 2 clusters in SnO 2 @g-C 3 N 4 , leading to the decreased d-band center, which can promote the OOH* to HOOH* transformation as the rate-determining step. Meanwhile, the SnO 2 @g-C 3 N 4 can improve the electron migration from bulk to the catalyst surface, as well as the electron separation, which also plays an important role in activity improvement. This work provides a promising photocatalyst for efficient visible light-driven generation of H 2 O 2 . KEYWORDS: SnO 2 cluster, g-C 3 N 4 , Visible light, H 2 O 2 production, Density functional theory

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Section: Resultssupporting

confidence: 74%

Tensile Strain in Tin Oxide Clusters Stabilized by C₃N₄ for Highly Efficient Visible Light-Driven H₂O₂ Production

Zhang

Song

et al. 2022

ACS Sustainable Chem. Eng.

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“…When the sensors are exposed to alcohol vapor, the ethanol molecules react with surface oxygen species and produce free electrons, resulting in an increase in electronic conductance. The supposed reactions can be described as follows [43][44][45]…”

Section: Gas Sensing Mechanismmentioning

confidence: 99%

Gas Sensor Based on ZnO Nanostructured Film for the Detection of Ethanol Vapor

et al. 2022

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In this paper, the ZnO<La> target was synthesized by the solid-state reaction method and a nanostructured thin film was deposited by the RF (radio frequency) magnetron sputtering method on a Multi-Sensor-Platform. The obtained ZnO<La> nanostructured film was investigated as the sensing material. Energy-Dispersive X-ray (EDX) analysis indicated the existence of La in the synthesized ZnO<La> material. Scanning Electron Microscope (SEM) images of the film showed the grain sizes in the range of 20–40 nm. Sensor performance characteristics such as a dynamic response, response and recovery times, and ethanol detection range were investigated at 50–300 °C. A sensitivity was observed at extremely low concentrations of ethanol (0.7 ppm). The minimum response and recovery times of the sensor corresponding to 675 ppm ethanol vapor concentration at 250 °C were found to be 14 s and 61 s, respectively. The sensor showed a high response, good selectivity, fast response/recovery behavior, excellent repeatability toward ethanol vapor, and low sensitivity toward humidity. These characteristics enable the use of a ZnO<La> based sensor for ethanol detecting applications.

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“… 83 ZnO Ethanol 200/193.7 b 197 Co/ZnO Triethylamine 50/1020 c 198 ZnO Ethanol 100/47 c 199 ZnO Formaldehyde 200/227.4 c 200 TiO 2 H 2 10/58 d Increased oxygen vacancies provide more oxygen adsorption sites. 201 Ce-Fe 2 O 3 Acetone 100/26.3 c 202 W 18 O 49 @ PANI NH 3 100/50 b 203 SnO 2 H 2 0.1/1.25 c 204 Mo-SnO 2 Ethanol 100/46.8 b 205 Tb- SnO 2 Ethanol 100/53.6 c 206 Sb- SnO 2 /ZnO NO 2 1/9.5 a 207 ZnO CO 0.45/24.9 c 49 SnO 2 Ethanol 100/24.9 c 208 Bi 2 MoO 6 NH 3 5/53.97 b 209 Exposed crystal facet In 2 O 3 Ethanol 1000/610 c Th...…”

Section: Basic Sensing Mechanism Of a Single Materials And Enhancemen...mentioning

confidence: 99%

Heteronanostructural metal oxide-based gas microsensors

et al. 2022

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The development of high-performance, portable and miniaturized gas sensors has aroused increasing interest in the fields of environmental monitoring, security, medical diagnosis, and agriculture. Among different detection tools, metal oxide semiconductor (MOS)-based chemiresistive gas sensors are the most popular choice in commercial applications and have the advantages of high stability, low cost, and high sensitivity. One of the most important ways to further enhance the sensor performance is to construct MOS-based nanoscale heterojunctions (heteronanostructural MOSs) from MOS nanomaterials. However, the sensing mechanism of heteronanostructural MOS-based sensors is different from that of single MOS-based gas sensors in that it is fairly complex. The performance of the sensors is influenced by various parameters, including the physical and chemical properties of the sensing materials (e.g., grain size, density of defects, and oxygen vacancies of materials), working temperatures, and device structures. This review introduces several concepts in the design of high-performance gas sensors by analyzing the sensing mechanism of heteronanostructural MOS-based sensors. In addition, the influence of the geometric device structure determined by the interconnection between the sensing materials and the working electrodes is discussed. To systematically investigate the sensing behavior of the sensor, the general sensing mechanism of three typical types of geometric device structures based on different heteronanostructural materials are introduced and discussed in this review. This review will provide guidelines for readers studying the sensing mechanism of gas sensors and designing high-performance gas sensors in the future.

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Oxygen vacancy-based Tb-doped SnO2 nanotubes as an ultra-sensitive sensor for ethanol detection

Cited by 64 publications

References 54 publications

Tensile Strain in Tin Oxide Clusters Stabilized by C₃N₄ for Highly Efficient Visible Light-Driven H₂O₂ Production

Tensile Strain in Tin Oxide Clusters Stabilized by C₃N₄ for Highly Efficient Visible Light-Driven H₂O₂ Production

Gas Sensor Based on ZnO Nanostructured Film for the Detection of Ethanol Vapor

Heteronanostructural metal oxide-based gas microsensors

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Oxygen vacancy-based Tb-doped SnO2 nanotubes as an ultra-sensitive sensor for ethanol detection

Cited by 64 publications

References 54 publications

Tensile Strain in Tin Oxide Clusters Stabilized by C3N4 for Highly Efficient Visible Light-Driven H2O2 Production

Tensile Strain in Tin Oxide Clusters Stabilized by C3N4 for Highly Efficient Visible Light-Driven H2O2 Production

Gas Sensor Based on ZnO Nanostructured Film for the Detection of Ethanol Vapor

Heteronanostructural metal oxide-based gas microsensors

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Product

Resources

About

Tensile Strain in Tin Oxide Clusters Stabilized by C₃N₄ for Highly Efficient Visible Light-Driven H₂O₂ Production

Tensile Strain in Tin Oxide Clusters Stabilized by C₃N₄ for Highly Efficient Visible Light-Driven H₂O₂ Production