In2O3–ZnO nanocomposites: High sensor response and selectivity to ethanol

Gholami, Mahsa; Khodadadi, Abbas Ali; Firooz, Azam Anaraki; Mortazavi, Yadollah

doi:10.1016/j.snb.2015.02.030

Cited by 56 publications

(19 citation statements)

References 27 publications

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“…The higher sensitivity of the modied CdO/ZnO/Yb 2 O 3 NSs/GCE assembly can be accredited to the outstanding absorption ability and high catalytic-decomposition activity. 1,38,[43][44][45] The projected sensitivity of the CdO/ZnO/Yb 2 O 3 NSs/GCE sensor is comparatively higher and the detection limit is reasonably lower than earlier reported ethanol sensors based on other nanomaterials-modied electrodes according to I-V systems.…”

Section: Xps Analysismentioning

confidence: 63%

Ethanol sensor development based on ternary-doped metal oxides (CdO/ZnO/Yb₂O₃) nanosheets for environmental safety

et al. 2017

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Herein, we report the construction of a dynamic, highly sensitive, stable, reliable, and reproducible selective ethanol sensor based on a ternary metal oxide system of CdO/ZnO/Yb 2 O 3 nanosheets (NSs). The NSs were synthesized by a hydrothermal process in alkaline phases. The morphological and structural characterization of the synthesized NSs were approved using various advantageous and well-established conventional methods such as Fourier-transform infrared spectroscopy (FTIR), ultraviolet visible spectroscopy (UV/vis), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray spectroscopy (EDS), and powder X-ray diffraction (XRD). A thin layer of CdO/ZnO/Yb 2 O 3 NSs was deposited onto a glassy carbon electrode (GCE) with conducting binder to produce a working electrode. A calibration plot was obtained and was found to be linear over the ethanol concentration range (linear dynamic range, LDR) from 0.35 nM to 3.5 mM with the detection limit (LoD) of 0.127 AE 0.006 nM and the quantification limit (LoQ) of 0.423 AE 0.02 (signal-to-noise ratio, at the S/N of 3), and the system exhibited a sensitivity of 7.4367 mA mM À1 cm À2

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Section: Xps Analysismentioning

confidence: 63%

Ethanol sensor development based on ternary-doped metal oxides (CdO/ZnO/Yb₂O₃) nanosheets for environmental safety

et al. 2017

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“…7,8 Semiconducting oxide micro-and nanostructures are widely used for detecting volatile organic compound (VOC) vapors such as ethanol vapors in small concentrations, 1, 6 due to their high sensitivity, low fabrication cost and low power consumption. 1, [10][11][12][13] However, the limited selectivity of pristine materials such as SnO2 and ZnO 1, 11,[14][15][16] has led to the development of different modifications for improving their selectivity to specific VOCs within mixtures. 6,9,[17][18][19][20] In the case of ZnO, doping with transition metals or the addition of other basic metal oxides (with lower electronegativity) is known to be efficient methods that increase the ethanol response.…”

Section: Introductionmentioning

confidence: 99%

Tuning doping and surface functionalization of columnar oxide films for volatile organic compound sensing: experiments and theory

et al. 2018

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“…25,26 In addition, the formation of a nanoheterostructure between In 2 O 3 and ZnO is known to increase the gas response and selectivity. 27,28 Just aer the formation of junction between In 2 O 3 and ZnO, the electrons will ow from the material with low work function to that with high work function until their Fermi levels equalize, which creates an electron depletion layer at the interface and bends the energy band. Unfortunately, the relative levels of work functions for In 2 O 3 and ZnO are not consistent in the literatures and depend on the degree of nonstoichoiometry.…”

Section: Resultsmentioning

confidence: 99%

Solution combustion synthesis and enhanced gas sensing properties of porous In₂O₃/ZnO heterostructures

Zou

Yan

et al. 2017

RSC Adv.

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Self-assembled porous In 2 O 3 /ZnO heterostructures were prepared by a low temperature solution combustion synthesis method, and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM). The results indicate that the as-synthesized porous In 2 O 3 /ZnO heterostructures were constructed from a large number of In 2 O 3 and ZnO nanoparticles and showed high gas sensing performance toward Cl 2 . Compared with pure ZnO and other heterostructure sensors, the porous In 2 O 3 /ZnO heterostructures with an appropriate molar ratio of In 2 O 3 : ZnO exhibited highly enhanced gas sensing performances toward Cl 2 .An extremely high sensitivity of 6610 could be reached when exposed to 50 ppm Cl 2 at 370 C; also, In 2 O 3 /ZnO heterostructures showed high selectivity toward Cl 2 . Furthermore, the gas sensing mechanism was discussed.

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In2O3–ZnO nanocomposites: High sensor response and selectivity to ethanol

Cited by 56 publications

References 27 publications

Ethanol sensor development based on ternary-doped metal oxides (CdO/ZnO/Yb₂O₃) nanosheets for environmental safety

Ethanol sensor development based on ternary-doped metal oxides (CdO/ZnO/Yb₂O₃) nanosheets for environmental safety

Tuning doping and surface functionalization of columnar oxide films for volatile organic compound sensing: experiments and theory

Solution combustion synthesis and enhanced gas sensing properties of porous In₂O₃/ZnO heterostructures

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In2O3–ZnO nanocomposites: High sensor response and selectivity to ethanol

Cited by 56 publications

References 27 publications

Ethanol sensor development based on ternary-doped metal oxides (CdO/ZnO/Yb2O3) nanosheets for environmental safety

Ethanol sensor development based on ternary-doped metal oxides (CdO/ZnO/Yb2O3) nanosheets for environmental safety

Tuning doping and surface functionalization of columnar oxide films for volatile organic compound sensing: experiments and theory

Solution combustion synthesis and enhanced gas sensing properties of porous In2O3/ZnO heterostructures

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Product

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Ethanol sensor development based on ternary-doped metal oxides (CdO/ZnO/Yb₂O₃) nanosheets for environmental safety

Ethanol sensor development based on ternary-doped metal oxides (CdO/ZnO/Yb₂O₃) nanosheets for environmental safety

Solution combustion synthesis and enhanced gas sensing properties of porous In₂O₃/ZnO heterostructures