Microwave-assisted hydrothermal synthesis of Pt/SnO2 gas sensor for CO detection

Wang, Qingji; Bao, Liwen; Cao, Zongqiang; Li, Chaoyang; Li, Xu; Liu, Fangmeng; Sun, Peng; Lu, Geyu

doi:10.1016/j.cclet.2019.12.007

Cited by 33 publications

(9 citation statements)

References 30 publications

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“…There have, thus, been efforts to improve SnO 2 ’s ability to detect various compounds. Some of these efforts included tailoring its size and morphology (e.g., making it in the form of nanosheets); doping various metallic or nonmetallic agents in it (e.g., Al/SnO 2 , S–SnO 2 , and Pt/SnO 2 , ); and preparing it in the form of composite materials (such as Cr 2 O 3 /SnO 2 , SnO/SnO 2 , ZnO/SnO 2 , CuO/SnO 2 , and CeO 2 /SnO 2 ).…”

Section: Introductionmentioning

confidence: 99%

“…There have, thus, been efforts to improve SnO 2 's ability to detect various compounds. Some of these efforts included tailoring its size and morphology (e.g., making it in the form of nanosheets 23 ); doping various metallic or nonmetallic agents in it (e.g., Al/SnO 2 , 24 S−SnO 2 , 25 and Pt/SnO 2 26,27 ); and preparing it in the form of composite materials (such as Cr 2 O 3 /SnO 2 , 28 SnO/SnO 2 , 29 ZnO/SnO 2 , 30 CuO/SnO 2 , 31 and CeO 2 /SnO 2 32 ). To the best of our knowledge, while many materials including two-dimensional (2D) reduced graphene oxide (rGO) have been used to fabricate hybrid SnO 2 -based sensors for various VOCs, 17 rGO has not been applied with SnO 2 for the detection of TEA.…”

Section: Introductionmentioning

confidence: 99%

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Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Tian

Wang

Shang

et al. 2023

ACS Appl. Nano Mater.

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Rapid and effective detection of potent volatile organic compounds (VOCs) at low operating temperatures is of great significance to keep humans safe from these environmental pollutants. In this work, we show the facile synthesis of two-dimensional (2D) and three-dimensional (3D)-laminated SnO2 nanomaterials that are decorated with reduced graphene oxide (rGO) and their efficient chemosensing properties for the potent VOC triethylamine (TEA). The as-prepared hybrid material (rGO/SnO2) possesses p-n-type heterojunction and mesoporous structures that are composed of self-assembled SnO2 nanoparticles. The heterojunction between rGO and SnO2 in this hybrid material can be tuned by varying the relative amount of rGO in it. Because of its 3D/2D structures and p-n heterojunction, the material exhibits better carrier mobility, electron transfer, activation energy, and mass diffusion for chemosensing processes than pristine SnO2. It also shows excellent chemosensing properties for TEA, with high response and selectivity at low operating temperatures, while remaining stable and operational for 13 days. Its detection limit for TEA, for example, can reach as low as 358 ppb. These attributes make this material a promising TEA chemosensor for practical applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Tian

Wang

Shang

et al. 2023

ACS Appl. Nano Mater.

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“…However, the heterojunction part is so sensitive to the composite materials semiconductor properties, content ratio, and structure; hence, the sensing results are not ideally repeatable. Moreover, doping with noble elements can change the position of energy levels in the conduction band of SnO 2 , such as by doping Pd [ 24 ], Ru [ 25 ], Al [ 26 ], Pt [ 27 ], Sb [ 28 ], Ce [ 29 ], Ag [ 30 ], and Ti [ 31 ], which is a more reliable and economical way to increase the selectivity and sensitivity compared to nanostructure modification and heterojunction structure building towards the gas sensing performance optimization [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

Investigation on Sensing Performance of Highly Doped Sb/SnO2

Feng

Gaiardo

Valt

et al. 2022

Sensors

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Tin dioxide (SnO2) is the most-used semiconductor for gas sensing applications. However, lack of selectivity and humidity influence limit its potential usage. Antimony (Sb) doped SnO2 showed unique electrical and chemical properties, since the introduction of Sb ions leads to the creation of a new shallow band level and of oxygen vacancies acting as donors in SnO2. Although low-doped SnO2:Sb demonstrated an improvement of the sensing performance compared to pure SnO2, there is a lack of investigation on this material. To fill this gap, we focused this work on the study of gas sensing properties of highly doped SnO2:Sb. Morphology, crystal structure and elemental composition were characterized, highlighting that Sb doping hinders SnO2 grain growth and decreases crystallinity slightly, while lattice parameters expand after the introduction of Sb ions into the SnO2 crystal. XRF and EDS confirmed the high purity of the SnO2:Sb powders, and XPS highlighted a higher Sb concentration compared to XRF and EDS results, due to a partial Sb segregation on superficial layers of Sb/SnO2. Then, the samples were exposed to different gases, highlighting a high selectivity to NO2 with a good sensitivity and a limited influence of humidity. Lastly, an interpretation of the sensing mechanism vs. NO2 was proposed.

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“…Wang et al invented a high temperature mixed potential CO gas sensor for on-site combustion control, and these porous NiO sensors were able to detect a low CO range of 0-100 ppm at 1000 • C [11]. Wang et al obtained Pt/SnO 2 nanostructures through microwave-assisted hydrothermal synthesis with strong and quick responses 100 ppm CO at 225 • C [12].…”

Section: Introductionmentioning

confidence: 99%

Aging Behavior and Heat Treatment for Room-Temperature CO-Sensitive Pd-SnO2 Composite Nanoceramics

Gui

Huang

et al. 2022

Materials

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A high long-term stability is crucial for room-temperature gas-sensitive metal oxide semiconductors (MOSs) to find practical applications. A series of Pd-SnO2 mixtures with 2, 5, and 10 wt% Pd separately were prepared from SnO2 and Pd powders. Through pressing and sintering, Pd-SnO2 composite nanoceramics have been successfully prepared from the mixtures, which show responses of 50, 100, and 60 to 0.04% CO-20% O2-N2 at room temperature for samples of 2, 5, and 10 wt% Pd, respectively. The room-temperature CO-sensing characteristics were degraded obviously after dozens of days’ aging for all samples. For samples of 5 wt% Pd, the response to CO was decreased by a factor of 4 after 20 days of aging. Fortunately, some rather mild heat treatments will quite effectively reactivate those aged samples. Heat treatment at 150 °C for 15 min in air tripled the response to CO for a 20 days-aged sample of 5 wt% Pd. It is proposed that the deposition of impurity gases in air on Pd in Pd-SnO2 composite nanoceramics has resulted in the observed aging, while their desorption from Pd through mild heat treatments leads to the reactivation. More studies on aging and reactivation of room-temperature gas sensitive MOSs should be conducted to achieve high long-term stability for room-temperature MOS gas sensors.

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Microwave-assisted hydrothermal synthesis of Pt/SnO2 gas sensor for CO detection

Cited by 33 publications

References 30 publications

Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Investigation on Sensing Performance of Highly Doped Sb/SnO2

Aging Behavior and Heat Treatment for Room-Temperature CO-Sensitive Pd-SnO2 Composite Nanoceramics

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Microwave-assisted hydrothermal synthesis of Pt/SnO2 gas sensor for CO detection

Cited by 33 publications

References 30 publications

Heterojunction-Engineered Reduced Graphene Oxide/SnO2 with Mesoporous Structures for Gas Chemosensors

Heterojunction-Engineered Reduced Graphene Oxide/SnO2 with Mesoporous Structures for Gas Chemosensors

Investigation on Sensing Performance of Highly Doped Sb/SnO2

Aging Behavior and Heat Treatment for Room-Temperature CO-Sensitive Pd-SnO2 Composite Nanoceramics

Contact Info

Product

Resources

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Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors

Heterojunction-Engineered Reduced Graphene Oxide/SnO₂ with Mesoporous Structures for Gas Chemosensors