Acetone gas sensor based on NiO/ZnO hollow spheres: Fast response and recovery, and low (ppb) detection limit

Liu, Chang; Zhao, Lin; Boqun, Wang; Sun, Peng; Qingji, Wang; Gao, Yuan; Liang, Xishuang; Zhang, Tong

doi:10.1016/j.jcis.2017.01.106

Cited by 199 publications

(54 citation statements)

References 49 publications

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“…Through the combination of n -ZnO and p -NiO, it is possible to develop gas sensors with superior sensing performance. For example, Liu et al demonstrated the superior acetone sensing performance of ZnO-NiO nanocomposites compared to pure ZnO [26]. Deng et al reported the superior ethanol sensing properties of ZnO-NiO composites compared to pure NiO sensors [24].…”

Section: Introductionmentioning

confidence: 99%

Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading

et al. 2018

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Metal oxide p-n heterojunction nanofibers (NFs) are among the most promising approaches to enhancing the efficiency of gas sensors. In this paper, we report the preparation of a series of p-NiO-loaded n-ZnO NFs, namely (1−x)ZnO-xNiO (x = 0.03, 0.05, 0.7, 0.1, and 0.15 wt%), for hydrogen gas sensing experiments. Samples were prepared through the electrospinning technique followed by a calcination process. The sensing experiments showed that the sample with 0.05 wt% NiO loading resulted in the highest sensing performance at an optimal sensing temperature of 200 °C. The sensing mechanism is discussed in detail and contributions of the p-n heterojunctions, metallization of ZnO and catalytic effect of NiO on the sensing enhancements of an optimized gas sensor are analyzed. This study demonstrates the possibility of fabricating high-performance H2 sensors through the optimization of p-type metal oxide loading on the surfaces of n-type metal oxides.

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Section: Introductionmentioning

confidence: 99%

Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading

et al. 2018

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“…36-1451). And the interplanar distances of 0.24 nm agree well with the lattice spacing of the (111) planes of the cubic NiO [33], which indicate that NiO has already exists in the composites.…”

Section: Resultsmentioning

confidence: 73%

“…Moreover, the resistance of the NiO-decorated ZnO in air (Ra) will be even higher than without the heterojunctions (pure ZnO) due to a new depletion layer between NiO and ZnO [33,52]. Nevertheless, when the composite was exposed to test gases (SO 2 , SOF 2 and SO 2 F 2 ), the gas molecules react with the absorbed oxygen species of gas sensing material and release the electrons back to the material.…”

Section: Resultsmentioning

confidence: 99%

Synthesis, Characterization and Enhanced Sensing Properties of a NiO/ZnO p–n Junctions Sensor for the SF6 Decomposition Byproducts SO2, SO2F2, and SOF2

Liu

Zhou

Zhang

et al. 2017

Sensors

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The detection of partial discharge and analysis of the composition and content of sulfur hexafluoride SF6 gas components are important to evaluate the operating state and insulation level of gas-insulated switchgear (GIS) equipment. This paper reported a novel sensing material made of pure ZnO and NiO-decorated ZnO nanoflowers which were synthesized by a facile and environment friendly hydrothermal process for the detection of SF6 decomposition byproducts. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) were used to characterize the structural and morphological properties of the prepared gas-sensitive materials. Planar-type chemical gas sensors were fabricated and their gas sensing performances toward the SF6 decomposition byproducts SO2, SO2F2, and SOF2 were systemically investigated. Interestingly, the sensing behaviors of the fabricated ZnO nanoflowers-based sensor to SO2, SO2F2, and SOF2 gases can be obviously enhanced in terms of lower optimal operating temperature, higher gas response and shorter response-recovery time by introducing NiO. Finally, a possible gas sensing mechanism for the formation of the p–n junctions between NiO and ZnO is proposed to explain the enhanced gas response. All results demonstrate a promising approach to fabricate high-performance gas sensors to detect SF6 decomposition byproducts.

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“…Considering the previous reports in Table 1 [11,[35][36][37][38], the α-Fe 2 O 3 /SnO 2 HNA-based sensor in this work possesses relatively medium sensitivity (or operating temperature). We can conclude that the acetone sensing properties of MOXs can be further enhanced by constructing heterostructures or modifying with noble metals.…”

Section: Researchmentioning

confidence: 80%

Construction of 1D/2D α -Fe ₂ O ₃ /SnO ₂ Hybrid Nanoarrays for Sub-ppm Acetone Detection

et al. 2020

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Exhaled acetone is one of the representative biomarkers for the noninvasive diagnosis of type-1 diabetes. In this work, we have applied a facile two-step chemical bath deposition method for acetone sensors based on α-Fe2O3/SnO2 hybrid nanoarrays (HNAs), where one-dimensional (1D) FeOOH nanorods are in situ grown on the prefabricated 2D SnO2 nanosheets for on-chip construction of 1D/2D HNAs. After annealing in air, ultrafine α-Fe2O3 nanorods are homogenously distributed on the surface of SnO2 nanosheet arrays (NSAs). Gas sensing results show that the α-Fe2O3/SnO2 HNAs exhibit a greatly enhanced response to acetone (3.25 at 0.4 ppm) at a sub-ppm level compared with those based on pure SnO2 NSAs (1.16 at 0.4 ppm) and pure α-Fe2O3 nanorods (1.03 at 0.4 ppm), at an operating temperature of 340°C. The enhanced acetone sensing performance may be attributed to the formation of α-Fe2O3–SnO2 n-n heterostructure with 1D/2D hybrid architectures. Moreover, the α-Fe2O3/SnO2 HNAs also possess good reproducibility and selectivity toward acetone vapor, suggesting its potential application in breath acetone analysis.

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Acetone gas sensor based on NiO/ZnO hollow spheres: Fast response and recovery, and low (ppb) detection limit

Cited by 199 publications

References 49 publications

Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading

Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading

Synthesis, Characterization and Enhanced Sensing Properties of a NiO/ZnO p–n Junctions Sensor for the SF6 Decomposition Byproducts SO2, SO2F2, and SOF2

Construction of 1D/2D α -Fe ₂ O ₃ /SnO ₂ Hybrid Nanoarrays for Sub-ppm Acetone Detection

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Acetone gas sensor based on NiO/ZnO hollow spheres: Fast response and recovery, and low (ppb) detection limit

Cited by 199 publications

References 49 publications

Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading

Significant Enhancement of Hydrogen-Sensing Properties of ZnO Nanofibers through NiO Loading

Synthesis, Characterization and Enhanced Sensing Properties of a NiO/ZnO p–n Junctions Sensor for the SF6 Decomposition Byproducts SO2, SO2F2, and SOF2

Construction of 1D/2D α -Fe 2 O 3 /SnO 2 Hybrid Nanoarrays for Sub-ppm Acetone Detection

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Construction of 1D/2D α -Fe ₂ O ₃ /SnO ₂ Hybrid Nanoarrays for Sub-ppm Acetone Detection