Bimetallic Au/Pd nanoparticles decorated ZnO nanowires for NO2 detection

Chen, Xiangxiang; Shen, Yanbai; Zhou, Pengfei; Zhong, Xiangxi; Li, Guodong; Han, Cong; Wei, Dezhou; Li, Sean

doi:10.1016/j.snb.2019.03.095

Cited by 115 publications

(35 citation statements)

References 58 publications

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“…A response up to 18 for 500 ppb of NO2 at 50 °C (R/R0 ~ 36 /ppm) positions our system among the more promising ones [11]. However few papers show that equivalent or better results have been obtained operating in isothermal mode with nanoparticles of ZnO:Ga activated by H2 (R/R0 ~ 50 / ppm) [21], sputtered ZnO:W thin films (R/R0 ~ 35 / ppm) [6], ZnO:Fe microflowers (R/R0 ~ 60 / ppm) [8], ZnO/(Au-Pd) nanowires (R/R0 ~ 94 / ppm) [22]. Due to the low background resistance under air, the electrode design should be optimized for the detection of reducing gases which lead to a decrease of the resistance.…”

Section: Sensing Resultsmentioning

confidence: 99%

Ga doped ZnO thin films deposited by RF sputtering for NO₂ sensing

Presmanes

Gunasekaran

Thimont

et al. 2019

2019 5th Experiment International Conference (exp.at'19)

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Ga doped ZnO thin films have been deposited by Radio-Frequency (RF) magnetron sputtering on fused silica substrates. The structural analysis of the n-type sensitive material showed a preferential orientation in the [00l] direction. The microstructure of the thin film indicated an increasing grain size with the increase of the thicknesses. The micro sensor platforms have been fabricated with ZnO:Ga thin film deposited using a reliable stencil mask onto interdigitated electrodes containing micro-hotplates. The as fabricated micro sensor allowed to sense sub-ppm concentration (500 ppb) of nitrogen dioxide under cycled temperature mode. This system revealed promising sensing performance with a response R/R0 up to 18 at low temperature step (50 °C).

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Section: Sensing Resultsmentioning

confidence: 99%

Ga doped ZnO thin films deposited by RF sputtering for NO₂ sensing

Presmanes

Gunasekaran

Thimont

et al. 2019

2019 5th Experiment International Conference (exp.at'19)

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“…In Fig. 3 , we have summarized the NO 2 detection performance of various reported traditional materials-based sensors such as ZnO, SnO 2 , CNTs, TiO 2 , In 2 O 3 SnS 2 , and WO 3 , in terms of operating temperature, sensor response and recovery time [ 26 , 91 , 154 , 159 – 197 ]. Most of the traditional nanomaterial-based NO 2 sensors reported good sensor response at high operating temperatures (purple star) and simultaneously, they also suffered from the high recovery time (green circles).…”

Section: Introductionmentioning

confidence: 99%

Strategy and Future Prospects to Develop Room-Temperature-Recoverable NO2 Gas Sensor Based on Two-Dimensional Molybdenum Disulfide

2021

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Nitrogen dioxide (NO2), a hazardous gas with acidic nature, is continuously being liberated in the atmosphere due to human activity. The NO2 sensors based on traditional materials have limitations of high-temperature requirements, slow recovery, and performance degradation under harsh environmental conditions. These limitations of traditional materials are forcing the scientific community to discover future alternative NO2 sensitive materials. Molybdenum disulfide (MoS2) has emerged as a potential candidate for developing next-generation NO2 gas sensors. MoS2 has a large surface area for NO2 molecules adsorption with controllable morphologies, facile integration with other materials and compatibility with internet of things (IoT) devices. The aim of this review is to provide a detailed overview of the fabrication of MoS2 chemiresistance sensors in terms of devices (resistor and transistor), layer thickness, morphology control, defect tailoring, heterostructure, metal nanoparticle doping, and through light illumination. Moreover, the experimental and theoretical aspects used in designing MoS2-based NO2 sensors are also discussed extensively. Finally, the review concludes the challenges and future perspectives to further enhance the gas-sensing performance of MoS2. Understanding and addressing these issues are expected to yield the development of highly reliable and industry standard chemiresistance NO2 gas sensors for environmental monitoring.

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“…Furthermore, the bimetallic effect leads to an enhancement of gas adsorption and causes a stronger electron spillover from the ZnO surface to the bimetallic nanoclusters. Chen et al investigated Au/Pd-NPs decorated ZnO nanowires for NO 2 sensor [ 32 ]. Indeed, the enhanced sensing performance towards NO 2 is attributed to the oxygen vacancies that have been increased in Au/Pd@ZnO sample as well as the chemical sensitization that provides more active sites for NO 2 adsorption.…”

Section: Resultsmentioning

confidence: 99%

One Dimensional ZnO Nanostructures: Growth and Chemical Sensing Performances

et al. 2020

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Recently, one-dimensional (1D) nanostructures have attracted the scientific community attention as sensitive materials for conductometric chemical sensors. However, finding facile and low-cost techniques for their production, controlling the morphology and the aspect ratio of these nanostructures is still challenging. In this study, we report the vapor-liquid-solid (VLS) synthesis of one dimensional (1D) zinc oxide (ZnO) nanorods (NRs) and nanowires (NWs) by using different metal catalysts and their impact on the performances of conductometric chemical sensors. In VLS mechanism, catalysts are of great interest due to their role in the nucleation and the crystallization of 1D nanostructures. Here, Au, Pt, Ag and Cu nanoparticles (NPs) were used to grow 1D ZnO. Depending on catalyst nature, different morphology, geometry, size and nanowires/nanorods abundance were established. The mechanism leading to the VLS growth of 1D ZnO nanostructures and the transition from nanorods to nanowires have been interpreted. The formation of ZnO crystals exhibiting a hexagonal crystal structure was confirmed by X-ray diffraction (XRD) and ZnO composition was identified using transmission electron microscopy (TEM) mapping. The chemical sensing characteristics showed that 1D ZnO has good and fast response, good stability and selectivity. ZnO (Au) showed the best performances towards hydrogen (H2). At the optimal working temperature of 350 °C, the measured response towards 500 ppm of H2 was 300 for ZnO NWs and 50 for ZnO NRs. Moreover, a good selectivity to hydrogen was demonstrated over CO, acetone and ethanol.

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Bimetallic Au/Pd nanoparticles decorated ZnO nanowires for NO2 detection

Cited by 115 publications

References 58 publications

Ga doped ZnO thin films deposited by RF sputtering for NO₂ sensing

Ga doped ZnO thin films deposited by RF sputtering for NO₂ sensing

Strategy and Future Prospects to Develop Room-Temperature-Recoverable NO2 Gas Sensor Based on Two-Dimensional Molybdenum Disulfide

One Dimensional ZnO Nanostructures: Growth and Chemical Sensing Performances

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Bimetallic Au/Pd nanoparticles decorated ZnO nanowires for NO2 detection

Cited by 115 publications

References 58 publications

Ga doped ZnO thin films deposited by RF sputtering for NO2 sensing

Ga doped ZnO thin films deposited by RF sputtering for NO2 sensing

Strategy and Future Prospects to Develop Room-Temperature-Recoverable NO2 Gas Sensor Based on Two-Dimensional Molybdenum Disulfide

One Dimensional ZnO Nanostructures: Growth and Chemical Sensing Performances

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Ga doped ZnO thin films deposited by RF sputtering for NO₂ sensing

Ga doped ZnO thin films deposited by RF sputtering for NO₂ sensing