Realization of low-temperature and selective NO2 sensing of SnO2 nanowires via synergistic effects of Pt decoration and Bi2O3 branching

Bang, Jin Ho; Mirzaei, Ali; Han, Seungmin; Lee, Ha Young; Shin, Kihong; Kim, Sang Sub; Kim, Hyoun Woo

doi:10.1016/j.ceramint.2020.10.088

Cited by 26 publications

(4 citation statements)

References 68 publications

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“…[ 72 ] In addition, the strain in the nanowires induced by the volume change cannot release immediately and completely, which leads to structural aggregation of nanowires and accordingly poor cycling performance. [ 73 ] These problems can be partly solved by preparing branched nanowires, where secondary NW branches grow from a primary NW backbone in a radial direction, providing the capability of 3D connectivity. Obviously, the higher degree of complexity in such nanowires has many advantages: they can increase the number of connection points; they can enhance the interconnection of functional elements and stability; they would provide a way for parallel connectivity.…”

Section: Structure Design and Synthesis Of Nanowiresmentioning

confidence: 99%

Nanowires in Flexible Sensors: Structure is Becoming a Key in Controlling the Sensing Performance

Zhang

Sun

Chen

et al. 2022

Adv Materials Technologies

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Flexible sensors, as a kind of indispensable branch of flexible electronics, are garnering substantial in medical and industrial applications. Ever‐evolving advances in nanowires in their myriad forms have fueled many of the developments in this field. However, recent researches have extensively focused on the intrinsic properties of these nanomaterials, rationally designed structures, which are pivotal in sensing performance, to a large extent, are undervalued. Hereon, the latest advances in the structure design, together with controlled fabrication of nanowires for better sensing performance are highlighted. In specific, nanowires are classified according to morphologies and hybrid forms and their corresponding fabrication methodologies and influence on sensing properties are briefly discussed. Then, construction strategies for nanowire‐based sensors, including materials assembly and macroscopical design are systematically summarized. Subsequently, the characteristics and advantages of flexible sensors induced by various nanowires, including physical/physiological/multifunctional parameters sensing are reflected in the application examples. Finally, conclusions and challenges are presented for the development of nanowire‐based flexible sensors, as well as frontier strategies especially bionic design. This review is aimed at providing a valuable and systematic understanding of nanowires in sensing system and then serves as inspiration for intelligent designs in flexible future electronics.

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Section: Structure Design and Synthesis Of Nanowiresmentioning

confidence: 99%

Nanowires in Flexible Sensors: Structure is Becoming a Key in Controlling the Sensing Performance

Zhang

Sun

Chen

et al. 2022

Adv Materials Technologies

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“…Further, p–n type branched heterostructures were also significantly explored to improve the sensing performance of pristine nanowires. [ 9,14,31,32 ] It has been observed that p‐type metal oxides have been more commonly used to improve the performance of n‐type metal oxides. In an interesting work, the gas sensing performance of SnO 2 nanowires toward NO 2 has been improved by depositing TeO 2 nanowires on the top.…”

Section: Different Strategies To Modify Moxs Nanowires Surfacementioning

confidence: 99%

Materials Engineering Strategies to Control Metal Oxides Nanowires Sensing Properties

Kaur

Singh

Comini

2021

Adv Materials Inter

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such as transistors, solar cells, batteries, superconductivity, and so on. In particular, nanostructured MOXs were found to be highly efficient as active layers of sensors due to their high surfaceto-volume ratio, high crystallinity, and excellent stoichiometry. Over the years, many MOXs such as zinc oxide (ZnO), nickel oxide (NiO), tin oxide (SnO 2 ), etc. were synthesized in different nanostructured forms (nanotubes, nanorods, nanobelts, etc.) and successfully explored as an active sensing layer for the detection of various gas analytes. However, in the last few years, MOXs in nanowires (NWs) morphology were gaining great attention due to their well-defined crystal orientation, single crystallinity, excellent electrical properties, and faster response dynamics as gas diffusion prior to surface reactions is not required. [1] Besides their success, MOXs nanowires still suffer from selectivity and high temperature operation issues. To further improve their performances and overcome these obstacles, nowadays researchers are working on the modification of nanowires via different strategies. These strategies include nanowires heterostructures, quasi-1D core-shell structures, particle decoration, surface functionalization with self-assembled monolayers (SAMs), modification with graphene and MOX@MOF coresheath structures. Nanowires based heterostructures may synergistically combine the properties of two different materials in a single sensing platform at nanoscale level. [2] While, coreshell structures offer high surface area, lower rate of charge recombination, and full depletion regions, which are desirable properties to increase the sensing performance. [3] Moreover, nanowires functionalized with SAM molecules enhance the surface-specific interaction with gas analytes due to the presence of SAM functional groups; hence, improves the sensor selectivity. [4,5] In this review article, the above-mentioned strategies to improve the sensing performance of MOXs nanowires based chemoresistive sensors have been reviewed. In particular, attention has been paid to summarize the gas sensing mechanism suggested by the authors along with improvement in the sensor response, detection limits and working temperatures. The last decade's works have been reviewed in this review article. Moreover, the working principle of conductometric gas sensors, gas sensing mechanism, and synthesis techniques were briefly discussed.Metal oxides (MOXs), in the form of nanowires, have proved to be an excellent active sensing layer of chemoresistive sensors due to their unique physical/chemical properties such as single crystallinity, exceptional electrical properties, and so on. Indeed, MOXs nanowires-based gas sensors show fast dynamic response with excellent reproducibility, stability, and reactivity toward various gas analytes. However, their limited selectivity and high operation temperature that lead to high power consumption are still major issues that need to be addressed. To improve these characteristics, researchers nowadays are working in th...

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“…2 ) (Equations ( 2) and ( 3)) [37]. Catalysis of platinum can help in the enhancement of responsiveness of materials used for sensors to the various provided gases, due to a phenomenon referred to as the spillover effect [38,39]. The activity of Pt in this catalysis can help in accelerating the adsorption behaviour of molecular level oxygen; the adding of Pt dopants has a significant effect on surface area, which can lead to further chemisorbed oxygen species spillover, which increases the number of active sites on the BiVO 4 [11,26,33,40].…”

Section: Underlying Sensing Mechanismmentioning

confidence: 99%

Improvement in NO2 Gas Sensing Properties of Semiconductor-Type Sensors by Loading Pt into BiVO4 Nanocomposites at Room Temperature

Lin

Chavali

2021

Materials

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In the present study, we report the first attempt to prepare a conducive environment for Pt/BiVO4 nanocomposite material reusability for the promotion of sustainable development. Here, the Pt/BiVO4 nanocomposite was prepared using a hydrothermal method with various weight percentages of platinum for use in NO2 gas sensors. The surface morphologies and structure of the Pt/BiVO4 nanocomposite were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). The results showed that Pt added to BiVO4 with 3 wt.% Pt/BiVO4 was best at a concentration of 100 ppm NO2, with a response at 167.7, and a response/recovery time of 12/35 s, respectively. The Pt/BiVO4 nanocomposite-based gas sensor exhibits promising nitrogen dioxide gas-sensing characteristics, such as fast response, highly selective detection, and extremely short response/recovery time. Additionally, the mechanisms of gas sensing in Pt/BiVO4 nanocomposites were explored in this paper.

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Realization of low-temperature and selective NO2 sensing of SnO2 nanowires via synergistic effects of Pt decoration and Bi2O3 branching

Cited by 26 publications

References 68 publications

Nanowires in Flexible Sensors: Structure is Becoming a Key in Controlling the Sensing Performance

Nanowires in Flexible Sensors: Structure is Becoming a Key in Controlling the Sensing Performance

Materials Engineering Strategies to Control Metal Oxides Nanowires Sensing Properties

Improvement in NO2 Gas Sensing Properties of Semiconductor-Type Sensors by Loading Pt into BiVO4 Nanocomposites at Room Temperature

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