Enhanced gas sensing performance based on p-NiS/n-In2O3 heterojunction nanocomposites

Huang, Xinyu; Chi, Zongtao; Liu, Jian; Li, Donghua; Sun, Xiaojun; Ye, Cong; Wang, Yuchong; Li, Hao; Wang, Xuedong; Xie, Wanfeng

doi:10.1016/j.snb.2019.127305

Cited by 90 publications

(27 citation statements)

References 58 publications

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“…The main reason can be ascribed to the synergistic effect of the heterojunction between α-Fe 2 O 3 and SnO 2 . [1,44,45] Furthermore, the response of α-Fe 2 O 3 (4%)/SnO 2 increases rapidly with the increasing concentration of acetone, and can approach 73.7 at 500 ppm. For comparison, the dynamic response/recovery curves of the sensors based on Fe 2 O 3 (2%)/ SnO 2 and Fe 2 O 3 (6%)/SnO 2 were given, respectively, see Figures S3 and S4, Supporting Information.…”

Section: Resultsmentioning

confidence: 96%

“…With the rapid development of Web of Things and Industrial Internet (II), various sensors with superior performance are highly desirable. [1] In recent decades, metal oxide semiconductors (MOSs) based gas sensors earned extensive attention and solar light irradiation. [29] Very recently, Au-NiO@SnO 2 hollow microspheres with core-shell nanostructure were successfully fabricated, which exhibited enhanced acetone gas sensing properties including high response, fast response-recovery speed, good selectivity, low detection limit, and working stability.…”

Section: Introductionmentioning

confidence: 99%

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Construction of Hierarchical α‐Fe₂O₃/SnO₂ Nanoball Arrays with Superior Acetone Sensing Performance

Wang

Han

et al. 2020

Adv Materials Inter

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commercial applications both in military and civilian fields. [2-5] From the aspect of safety and environmental quality, gas sensors are becoming more and more important in our daily life, because they can instantly monitor the potential risk of explosive/toxic gas emission or leakage. [6] Acetone, for example, a kind of volatile organic compound (VOCs) with special aroma and colorless transparent nature, which is extensively utilized in micro/ nanoelectronics field, lithography, coatings, leather, pesticides, explosive plastic, rubber, paint, etc. [7-10] Specifically, acetone is also a flammable, explosive, and toxic organic liquid with an ignition point of 465 °C, and the most easily ignitable concentration is 4.5%. [11] Moreover, acetone vapor and air can easily form one explosive mixture with the explosive limit of ≈2.6-12.8%, and the concentration of the maximum explosive pressure is 6.3%. Therefore, once the acetone leakage occurs, it is easy to trigger public safety accident. [12,13] In recent years, MOSs such as SnO 2 , Fe 2 O 3 , ZnO, WO 3 , In 2 O 3 and their hybrids/composites based electronics such as sensors and detectors have allured intensive desire due to the wide application on detecting irritative, malodorous, explosive, and toxic VOC gases. [4,14-19] Unfortunately, gas sensors based on MOSs are still bearing some urgent problems to overcome such as slow response, a narrow detection limit, inferior selectivity, and short-term cycling stability, especially in high humidity conditions. [20,21] Very recently, many strategies have been proposed to relieve the above shortcomings via various intrigues such as rare metal decoration, doping modification technology, heterojunction, microwave-assist, etc. [22-27] Accordingly, some convincible progress and results have been achieved or are pushing forward. In 2019, Lu's group reported that the Au-doped and Au-loaded mesoporous In 2 O 3 exhibited superior acetone sensing performance. It was demonstrated that the sensing performance can be manipulated by different doping or loading methods of Au; Thereafter, the SnO 2 ultrathin films functionalized by single atom Pt could greatly enhance the trietylamine gas sensing performance; [25,28] Then, Chen and his co-workers reported that the p(NiO)/n(ZnO) heterojunction networks could increase the gas sensor response by more than four times, meanwhile, the lower detection limit was achieved. On the other hand, the p-n nanoheterojunction networks displayed a strong and selective response toward acetone and ethanol under Gas sensors based on SnO 2 , Fe 2 O 3 , and their nanocomposites are promising candidates for sensing of acetone, ethanol, hydrogen, NO 2 , ozone, and formaldehyde. In this work, a rational hydrothermal route is designed to prepare α-Fe 2 O 3 /SnO 2 porous sphere arrays assembled with hierarchical nanostructure (denoted as α-Fe 2 O 3 (x%)/SnO 2). The results demonstrate that the α-Fe 2 O 3 (4%)/SnO 2 based sensor exhibits excellent sensing performance, the short response/recovery time of 3 and 4 s, re...

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Construction of Hierarchical α‐Fe₂O₃/SnO₂ Nanoball Arrays with Superior Acetone Sensing Performance

Wang

Han

et al. 2020

Adv Materials Inter

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“…As a result, the NiO-decorated Nb 2 O 5 nanocomposites exhibit an improved gas sensing property to H 2 . The enhanced gas sensing performances of the Co 3 O 4 -decorated WO 3 nanowires [ 124 ], SnO 2 -Co 3 O 4 composite nanofibres [ 67 ], CuO-loaded In 2 O 3 nanofibres [ 125 ], hierarchical SnO/SnO 2 nanocomposites [ 126 ], ZnO nanowire arrays/CuO nanospheres heterostructures [ 127 ] and p-NiS/n-In 2 O 3 heterojunction nanocomposites [ 34 ] towards reducing gases can also be attributed to the reasons listed above.…”

Section: Enhanced Gas Sensing Mechanisms Of the Metal Oxide Heterojunctionsmentioning

confidence: 99%

“…With the development in the techniques to synthesise nanomaterials, it is facile to construct heterojunctions in composites composed of metal oxides. The metal oxide-based heterojunctions have been successfully established through various combined technologies, such as the thermal oxidation [ 28 ], hydrothermal method [ 32 ], electrospinning [ 33 , 34 ], chemical vapour deposition (CVD) [ 35 ], pulsed laser deposition (PLD) [ 36 ], the co-precipitation method [ 37 ] and the solvothermal method [ 38 ]. For example, the hydrothermal method was reported to effectively prepare the ZnO/SnO 2 [ 39 ] and the NiO/SnO 2 composites [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Metal Oxide Based Heterojunctions for Gas Sensors: A Review

et al. 2021

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The construction of heterojunctions has been widely applied to improve the gas sensing performance of composites composed of nanostructured metal oxides. This review summarises the recent progress on assembly methods and gas sensing behaviours of sensors based on nanostructured metal oxide heterojunctions. Various methods, including the hydrothermal method, electrospinning and chemical vapour deposition, have been successfully employed to establish metal oxide heterojunctions in the sensing materials. The sensors composed with the built nanostructured heterojunctions were found to show enhanced gas sensing performance with higher sensor responses and shorter response times to the targeted reducing or oxidising gases compare with those of the pure metal oxides. Moreover, the enhanced gas sensing mechanisms of the metal oxide-based heterojunctions to the reducing or oxidising gases are also discussed, with the main emphasis on the important role of the potential barrier on the accumulation layer.

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“…During the last several decades, a large number of gas sensors based on electrospun nanofibers integrated with metal sulfides have been developed for the detection of alcohols, nitrogen oxides (NO 2 and NO), methane, and other volatile organic compounds. [128][129][130][131][132][133][134] For example, WS 2 edge functionalized CNFs with multiple tubular pores (WS 2 @MTCNFs) have been prepared via a copolymer-assisted electrospinning and annealing process. 129 Owing to the usage of sacrificial templates of poly(styrene-acrylonitrile), the WS 2 @MTCNFs show a much larger specific surface area of 41.4 m 2 /g than WS 2 @CNFs (6.4 m 2 /g).…”

Section: Conductance Sensingmentioning

confidence: 99%

Transition metal sulfides meet electrospinning: versatile synthesis, distinct properties and prospective applications

et al. 2021

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Enhanced gas sensing performance based on p-NiS/n-In2O3 heterojunction nanocomposites

Cited by 90 publications

References 58 publications

Construction of Hierarchical α‐Fe₂O₃/SnO₂ Nanoball Arrays with Superior Acetone Sensing Performance

Construction of Hierarchical α‐Fe₂O₃/SnO₂ Nanoball Arrays with Superior Acetone Sensing Performance

Metal Oxide Based Heterojunctions for Gas Sensors: A Review

Transition metal sulfides meet electrospinning: versatile synthesis, distinct properties and prospective applications

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Enhanced gas sensing performance based on p-NiS/n-In2O3 heterojunction nanocomposites

Cited by 90 publications

References 58 publications

Construction of Hierarchical α‐Fe2O3/SnO2 Nanoball Arrays with Superior Acetone Sensing Performance

Construction of Hierarchical α‐Fe2O3/SnO2 Nanoball Arrays with Superior Acetone Sensing Performance

Metal Oxide Based Heterojunctions for Gas Sensors: A Review

Transition metal sulfides meet electrospinning: versatile synthesis, distinct properties and prospective applications

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Product

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Construction of Hierarchical α‐Fe₂O₃/SnO₂ Nanoball Arrays with Superior Acetone Sensing Performance

Construction of Hierarchical α‐Fe₂O₃/SnO₂ Nanoball Arrays with Superior Acetone Sensing Performance