Bimetallic AuPt alloy nanoparticles decorated on ZnO nanowires towards efficient and selective H2S gas sensing

Liu, Yiping; Zhu, Li-Yuan; Feng, Pu; Dang, Congcong; Li, Ming; Lu, Hong‐Liang; Gao, Liming

doi:10.1016/j.snb.2022.132024

Cited by 27 publications

(16 citation statements)

References 49 publications

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“…Specifically, bimetal composites could introduce tunable electronic structure, morphology, and stoichiometry, thus providing designable energy band structures and catalytic characteristics [ 62 ]. Moreover, bimetallic decoration could further lower the activation energy of the sensing reaction via synergistic catalysis, which contributes to a decrease of the operating temperature and an acceleration of the response/recovery process [ 63 , 64 ].…”

Section: Gas Sensing Mechanisms Of Noble Metal-decorated Smosmentioning

confidence: 99%

“…Currently, the MEMS device was extensively employed to provide gas sensors with stable temperature condition and low power consumption. Liu et al [ 64 ] fabricated the AuPt-decorated ZnO nanowires gas sensor based on MEMS devices for the H 2 S detection. As shown in Fig.…”

Section: Bimetal-decorated Smos-based Gas Sensorsmentioning

confidence: 99%

“…(ppm) Response t res /t rec LOD Refs. PtAu/ZnO Nanorods Hydrothermal H 2 130 250 157.4 a – – [ 58 ] AuAg/MWCNTs/WO 3 Composite films Hydrothermal NO 2 25 1 ~ 1700% b 267 s/– 45 ppb [ 350 ] AgPt/WO 3 Nanoparticles Hydrolysis and hydrothermal Acetone 140 100 250 a 41/13 s – [ 348 ] AuPt/ZnO Nanowires Hydrothermal H 2 S 300 20 17.7 a 17/151 s – [ 64 ] AgPt/TiO 2 /CuO/Cu 2 O Thin films Sputtering and hydrothermal N-butanol 300 100 ~ 200% b 12.4/4.2 s – [ 351 ] PdRh/ZnO …”

Section: Bimetal-decorated Smos-based Gas Sensorsmentioning

confidence: 99%

See 2 more Smart Citations

Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview

Zhu

Mao

et al. 2023

Nano-Micro Lett.

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Highly sensitive gas sensors with remarkably low detection limits are attractive for diverse practical application fields including real-time environmental monitoring, exhaled breath diagnosis, and food freshness analysis. Among various chemiresistive sensing materials, noble metal-decorated semiconducting metal oxides (SMOs) have currently aroused extensive attention by virtue of the unique electronic and catalytic properties of noble metals. This review highlights the research progress on the designs and applications of different noble metal-decorated SMOs with diverse nanostructures (e.g., nanoparticles, nanowires, nanorods, nanosheets, nanoflowers, and microspheres) for high-performance gas sensors with higher response, faster response/recovery speed, lower operating temperature, and ultra-low detection limits. The key topics include Pt, Pd, Au, other noble metals (e.g., Ag, Ru, and Rh.), and bimetals-decorated SMOs containing ZnO, SnO2, WO3, other SMOs (e.g., In2O3, Fe2O3, and CuO), and heterostructured SMOs. In addition to conventional devices, the innovative applications like photo-assisted room temperature gas sensors and mechanically flexible smart wearable devices are also discussed. Moreover, the relevant mechanisms for the sensing performance improvement caused by noble metal decoration, including the electronic sensitization effect and the chemical sensitization effect, have also been summarized in detail. Finally, major challenges and future perspectives towards noble metal-decorated SMOs-based chemiresistive gas sensors are proposed.

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Section: Gas Sensing Mechanisms Of Noble Metal-decorated Smosmentioning

confidence: 99%

Section: Bimetal-decorated Smos-based Gas Sensorsmentioning

confidence: 99%

Section: Bimetal-decorated Smos-based Gas Sensorsmentioning

confidence: 99%

See 1 more Smart Citation

Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview

Zhu

Mao

et al. 2023

Nano-Micro Lett.

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“…The improved sensing performance is attributed to the cosensitization of semiconductors and metals . The response of the AuPt@ZnO nanowire-based sensor to 20 ppm H 2 S at 300 °C is four times higher than that of pristine ZnO nanowires . The response of a Au-loaded SnO 2 -based gas sensor to 100 ppm H 2 at 250 °C is five times higher than that of the pristine SnO 2 -based gas sensor.…”

Section: Introductionmentioning

confidence: 97%

Expanding Selectivity Functionality of a ZnO Nanotetrapod-Based Volatile Organic Compound Sensor Using Au Nanoparticle Decoration

Lei

Sun

et al. 2023

ACS Appl. Nano Mater.

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Gas sensors with multiselectivity are drawing increasing attention and sensors with temperature-tuned dual selectivity have been developed. Because Au nanoparticles (NPs) can lower the activation barrier for sensing reactions, herein, Au NP decoration was used to expand the selectivity range of a ZnO nanotetrapod (NTP)based sensor. A temperature-tuned triselectivity sensor based on Au NP−ZnO NTPs was developed. The sensor exhibited enhanced selectivity for formaldehyde when the operation temperature was <200 °C, ethanol when the operation temperature was between 200 and 340 °C, and acetone when the operation temperature was >400 °C. Additionally, Au NP decoration increased the magnitude of response and decreased the optimal detection temperature of the sensor. This work demonstrates that Au NP decoration is an efficient approach for improving the performance of semiconductorbased gas sensors with temperature-tunable selectivity.

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“…Among the metal oxide semiconductor materials, in view of the advantages of non-toxicity, low prices, and good chemical stability [ 14 , 15 ], Ga 2 O 3 has potential applications in high-temperature gas sensors [ 16 , 17 ]. Moreover, nanostructures have been designed to enhance the performance of gas sensors because of their high surface-to-volume ratio, high specific surface area, and more surface adsorption sites, recently [ 18 , 19 , 20 , 21 ]. In this work, the GaOOH nanorods were grown on the SnO 2 seed layer by the hydrothermal synthesis method.…”

Section: Introductionmentioning

confidence: 99%

Investigation of High-Sensitivity NO2 Gas Sensors with Ga2O3 Nanorod Sensing Membrane Grown by Hydrothermal Synthesis Method

Chu

Yeh

et al. 2023

Nanomaterials

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In this work, Ga2O3 nanorods were converted from GaOOH nanorods grown using the hydrothermal synthesis method as the sensing membranes of NO2 gas sensors. Since a sensing membrane with a high surface-to-volume ratio is a very important issue for gas sensors, the thickness of the seed layer and the concentrations of the hydrothermal precursor gallium nitrate nonahydrate (Ga(NO3)3·9H2O) and hexamethylenetetramine (HMT) were optimized to achieve a high surface-to-volume ratio in the GaOOH nanorods. The results showed that the largest surface-to-volume ratio of the GaOOH nanorods could be obtained using the 50-nm-thick SnO2 seed layer and the Ga(NO3)3·9H2O/HMT concentration of 12 mM/10 mM. In addition, the GaOOH nanorods were converted to Ga2O3 nanorods by thermal annealing in a pure N2 ambient atmosphere for 2 h at various temperatures of 300 °C, 400 °C, and 500 °C, respectively. Compared with the Ga2O3 nanorod sensing membranes annealed at 300 °C and 500 °C, the NO2 gas sensors using the 400 °C-annealed Ga2O3 nanorod sensing membrane exhibited optimal responsivity of 1184.6%, a response time of 63.6 s, and a recovery time of 135.7 s at a NO2 concentration of 10 ppm. The low NO2 concentration of 100 ppb could be detected by the Ga2O3 nanorod-structured NO2 gas sensors and the achieved responsivity was 34.2%.

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Bimetallic AuPt alloy nanoparticles decorated on ZnO nanowires towards efficient and selective H2S gas sensing

Cited by 27 publications

References 49 publications

Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview

Advances in Noble Metal-Decorated Metal Oxide Nanomaterials for Chemiresistive Gas Sensors: Overview

Expanding Selectivity Functionality of a ZnO Nanotetrapod-Based Volatile Organic Compound Sensor Using Au Nanoparticle Decoration

Investigation of High-Sensitivity NO2 Gas Sensors with Ga2O3 Nanorod Sensing Membrane Grown by Hydrothermal Synthesis Method

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