Ag-nanoparticles-anchored mesoporous In2O3 nanowires for ultrahigh sensitive formaldehyde gas sensors

Kong, Dehao; Niu, J.Y.; Hong, Bo; Xu, Jingcai; Han, Yanbing; Peng, Xiaoling; Ge, Hongliang; Li, J.; Zeng, Yunxiong; Wang, X.Q.

doi:10.1016/j.mseb.2023.116394

Cited by 17 publications

(4 citation statements)

References 72 publications

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“…6(c) and 6(e) and Table S8. The formation of Ag/ELFO heterojunction shrinks HAL, which favors the formation of pre-adsorbed oxygen [40]. The electron transfer process from Ag nanoparticles into the conduction band of ELFO increases the band gap of SA samples, which are obtained by Eq.…”

Section: Gas Sensing Mechanismmentioning

confidence: 99%

Well-designed g-C ₃N ₄ nanosheet incorporated Ag loaded Er _0.05La _0.95FeO ₃ heterojunctions for isoamyl alcohol detection

Xu,

Han,

Zheng

et al. 2024

Journal of Advanced Ceramics

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Considering that the volatile content of isoamyl alcohol will increase sharply on the seventh day during wheat mildew, isoamyl alcohol can be determined as an early biomarker of wheat mildew. J u s t A c c e p t e d 2Currently, there are only few sensors reported for isoamyl alcohol detection, which still suffer from low sensitivity and poor moisture resistance. Herein, the sensitivity of 5 at% Er@LaFeO3 (ELFO) for isoamyl alcohol was enhanced by loading Ag nanoparticles on the surface of the ELFO microspheres while the optimal operating temperature was reduced. The moisture resistance of Ag/ELFO was improved by the incorporation of g-C3N4 nanosheets (NSs) on the surface of Ag/ELFO through electrostatic self-assembly. Given the requirement of practical application in grain granaries, the sensing behavior of g-C3N4 NSs incorporated Ag/ELFO-based sensor at 20% RH was systematically studied, which demonstrated excellent repeatability, long-term stability, and superior selectivity (791 at 50 ppm) for isoamyl alcohol with a low limit of detection (LOD = 75 ppb). Furthermore, the practical results of wheat at different mildew stages further confirmed the application potential of the g-C3N4/Ag/ELFO-based sensor in monitoring the early mildew stage of wheat. This work may offer guidance for enhancing the moisture resistance of gas-sensitive materials through the strategy of employing composite nanomaterials.

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Section: Gas Sensing Mechanismmentioning

confidence: 99%

Well-designed g-C ₃N ₄ nanosheet incorporated Ag loaded Er _0.05La _0.95FeO ₃ heterojunctions for isoamyl alcohol detection

Xu,

Han,

Zheng

et al. 2024

Journal of Advanced Ceramics

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“…Apart from doping, Kong et al also reported a method for effectively decreasing the operating temperature. 146 Mesoporous In 2 O 3 nanowires modified by Ag nanoparticles were prepared by the hydrolysis reaction. The sensitivity of pristine and Ag-loaded In 2 O 3 to 10 ppm formaldehyde measured at various temperatures revealed that the optimal working temperature decreased from 210 to 150 °C, demonstrating a decrease in the activation energy.…”

Section: Effect Of Heterojunction On the Gas-sensing Performance Of M...mentioning

confidence: 99%

Nanostructured metal oxide heterojunctions for chemiresistive gas sensors

Ma,

2023

J. Mater. Chem. A

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“…Metal oxides’ semiconductors are recognized as the potential advanced functional materials due to the wider band gap, low cost, and chemical stability 1–7 . Among these oxides, indium oxide (In 2 O 3 ) which has excellent electronic, optical, and physical properties, is used in semiconductors, gas sensors, photo catalysts, and energy system 8–10 . As a semiconductor material, In 2 O 3 oxide is a typical n ‐type semiconductor with the wide band gap 11 .…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7] Among these oxides, indium oxide (In 2 O 3 ) which has excellent electronic, optical, and physical properties, is used in semiconductors, gas sensors, photo catalysts, and energy system. [8][9][10] As a semiconductor material, In 2 O 3 oxide is a typical n-type semiconductor with the wide band gap. 11 Li and Feng et al 12 have used the first-principles to explore the structural configuration and electronic properties of the α-In 2 O 3 monolayer.…”

Section: Introductionmentioning

confidence: 99%

Influence of vacancies on the optical and electronic properties of the rhombohedral In₂O₃ oxide

Pan,

Wen

2023

J Am Ceram Soc.

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To study the vacancy mechanism of In2O3, we apply the first‐principles method to study the influence of vacancy on the structural stability, electronic and optical properties of the rhombohedral In2O3. Two vacancies: In‐vacancy (V‐In) and O‐vacancy (V‐O) are considered here. The calculated results show that the rhombohedral In2O3 with In‐vacancy and O‐vacancy are thermodynamic and dynamical stabilities based on the vacancy formation energy and phonon dispersion. In particular, In‐vacancy has better thermodynamic stability in comparison to the O‐vacancy. Importantly, the rhombohedral In2O3 exhibits ultraviolet properties. However, two vacancies lead to the peak migration from the ultraviolet region to the visible light region. Furthermore, it is found that the calculated band gap of In2O3 with In‐vacancy is 1.07 eV, which is wider than the parent In2O3 (0.841 eV). Naturally, the wide band gap of In‐vacancy is that the removed In atom aggravates the difficulty of the electronic interaction between the conduction band and the valence band near the Fermi level. On the contrary, O‐vacancy shows metallic behavior because O‐vacancy (V‐O) enhances the electronic interaction near the Fermi level.

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Ag-nanoparticles-anchored mesoporous In2O3 nanowires for ultrahigh sensitive formaldehyde gas sensors

Cited by 17 publications

References 72 publications

Well-designed g-C ₃N ₄ nanosheet incorporated Ag loaded Er _0.05La _0.95FeO ₃ heterojunctions for isoamyl alcohol detection

Well-designed g-C ₃N ₄ nanosheet incorporated Ag loaded Er _0.05La _0.95FeO ₃ heterojunctions for isoamyl alcohol detection

Nanostructured metal oxide heterojunctions for chemiresistive gas sensors

Influence of vacancies on the optical and electronic properties of the rhombohedral In₂O₃ oxide

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Ag-nanoparticles-anchored mesoporous In2O3 nanowires for ultrahigh sensitive formaldehyde gas sensors

Cited by 17 publications

References 72 publications

Well-designed g-C 3N 4 nanosheet incorporated Ag loaded Er 0.05La 0.95FeO 3 heterojunctions for isoamyl alcohol detection

Well-designed g-C 3N 4 nanosheet incorporated Ag loaded Er 0.05La 0.95FeO 3 heterojunctions for isoamyl alcohol detection

Nanostructured metal oxide heterojunctions for chemiresistive gas sensors

Influence of vacancies on the optical and electronic properties of the rhombohedral In2O3 oxide

Contact Info

Product

Resources

About

Well-designed g-C ₃N ₄ nanosheet incorporated Ag loaded Er _0.05La _0.95FeO ₃ heterojunctions for isoamyl alcohol detection

Well-designed g-C ₃N ₄ nanosheet incorporated Ag loaded Er _0.05La _0.95FeO ₃ heterojunctions for isoamyl alcohol detection

Influence of vacancies on the optical and electronic properties of the rhombohedral In₂O₃ oxide