Metal-Organic frameworks-derived bamboo-like CuO/In2O3 Heterostructure for high-performance H2S gas sensor with Low operating temperature

Li, Sihan; Xie, Lei; He, Meng; Hu, Xiaobing; Luo, Guifang; Chen, Cheng; Zhu, Zhigang

doi:10.1016/j.snb.2020.127828

Cited by 169 publications

(80 citation statements)

References 38 publications

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“…In the target gas atmosphere, redox reactions occur between oxygen ions and target gas molecules, releasing electrons back to the conduction band of the material [31] . The thickness of the electron depletion layer decreases and the resistance decreases [6c] . Resistance modulation and oxygen molecule desorption are completed..Therefore, promoting the chemical reaction between oxygen and target gas molecules on the surface of sensing material is conducive to enhance resistance modulation and improve sensor response.…”

Section: Sensing Parameters and Mechanismsmentioning

confidence: 99%

“…Hitherto, various MOSs have been found to be suitable for sensing materials, such as SnO 2 , WO 3 , TiO 2 , In 2 O 3 , ZnO, etc [6a,b,c,d] . Among them, ZnO is an important multi‐functional n‐type semiconductor material with a wide band gap of 3.37 eV, a large exciton binding energy of 60 meV and a high hall mobility of 200 cm 2 v −1 s −1 at room temperature [7] .…”

Section: Introductionmentioning

confidence: 99%

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Advances in Doped ZnO Nanostructures for Gas Sensor

Wang

Gong

et al. 2020

The Chemical Record

131

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Gas sensors based on metal oxides semiconductor (MOS) have attracted extensive attention from both academic and industry. ZnO, as a typical MOS, exhibits potential applications in toxic gas detection, owning to its wide band gap, n-type transport characteristic and excellent electrical performance. Meanwhile, doping is an effective way to improve the sensing performance of ZnO materials. In this review, the effects of different types of doping on morphology, crystal structure, band gap and depletion layer of ZnO materials are comprehensively discussed. Theoretical analysis on the strategies for enhancing the sensing properties of ZnO is also provided. This review puts forward the reasonable insight for designing efficient n-type ZnO-based semiconductor oxide sensing materials.

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Section: Sensing Parameters and Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Advances in Doped ZnO Nanostructures for Gas Sensor

Wang

Gong

et al. 2020

The Chemical Record

131

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“…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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“…Qiao et al [18] reported Mo-doped BiVO 4 were with high sensitivity, selectivity, fast response towards 20 ppm H 2 S at optimized temperature of 150 • C. Li et al [19] analyzed the effect of integrating p-type and n-type semiconductor for H 2 S by synthesizing metal-organic frameworksderived bamboo-like CuO/In 2 O 3 heterostructure. Flower-like structures composed of vertical aligned ZnO nanorods showed a high response and selectivity for H 2 S at room temperature [20]. Hydrothermally synthesized pure ZnO and Cu-doped ZnO nanostructures decorated with reduced graphene oxide were compared for their H 2 S gas sensing behavior by Shewale et al [21] and it was concluded that Cu doping and rGO inclusion, resulted in improved sensing parameters.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Leaf-Shaped CuO Nanosheets Based Sensor Device for Enhanced Hydrogen Sulfide Gas Sensing Application

Algadi

Kumar²,

Akhtar

et al. 2021

Chemosensors

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Herein, a simple, economical and low temperature synthesis of leaf-shaped CuO nanosheets is reported. As-synthesized CuO was examined through different techniques including field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), X-ray diffraction (XRD), fourier transform infrared spectroscopic (FTIR) and Raman spectroscopy to ascertain the purity, crystal phase, morphology, vibrational, optical and diffraction features. FESEM and TEM images revealed a thin leaf-like morphology for CuO nanosheets. An interplanar distance of ~0.25 nm corresponding to the (110) diffraction plane of the monoclinic phase of the CuO was revealed from the HRTEM images XRD analysis indicated a monoclinic tenorite crystalline phase of the synthesized CuO nanosheets. The average crystallite size for leaf-shaped CuO nanosheets was found to be 14.28 nm. Furthermore, a chemo-resistive-type gas sensor based on leaf-shaped CuO nanosheets was fabricated to effectively and selectively detect H2S gas. The fabricated sensor showed maximum gas response at an optimized temperature of 300 °C towards 200 ppm H2S gas. The corresponding response and recovery times were 97 s and 100 s, respectively. The leaf-shaped CuO nanosheets-based gas sensor also exhibited excellent selectivity towards H2S gas as compared to other analyte gases including NH3, CH3OH, CH3CH2OH, CO and H2. Finally, we have proposed a gas sensing mechanism based upon the formation of chemo-resistive CuO nanosheets.

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Metal-Organic frameworks-derived bamboo-like CuO/In2O3 Heterostructure for high-performance H2S gas sensor with Low operating temperature

Cited by 169 publications

References 38 publications

Advances in Doped ZnO Nanostructures for Gas Sensor

Advances in Doped ZnO Nanostructures for Gas Sensor

Metal Oxide Based Heterojunctions for Gas Sensors: A Review

Ultrathin Leaf-Shaped CuO Nanosheets Based Sensor Device for Enhanced Hydrogen Sulfide Gas Sensing Application

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