Room temperature NO2 sensing properties of Au-decorated vanadium oxide nanowires sensor

Liang, Jiran; Zhu, Kuilong; Ran, Yang; Hu, Ming

doi:10.1016/j.ceramint.2017.10.186

Cited by 34 publications

(27 citation statements)

References 40 publications

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“…The small particle size and high number of particles accelerate dissociation and adsorption of oxygen at VO2 surface and thus improve the sensor response from 1.14 to 3.22. This report also showed that VO2 decorated with Au was also sensitive to acetone, ethanol, isopropanol and NH3, with response of 1.04, 1.08, 1.12 and 1.05, respectively [580]. It was found that VO2(M) nanostructures were more sensitive at high RH while VO2 (B) nanostructures presented higher sensitivity at low RH values [558].…”

Section: Vanadium Oxidementioning

confidence: 90%

“…On Figure 24, it is possible to observe some of the vanadium oxide nanostructures reported. VO2 carambola shaped nanostructure on graphene [586], reproduced with permission of Royal Society of Chemistry (2018); (e) V2O5 urchin-like structures [555], and (f) VO2 nanorods [580]. Reproduced with permission of Royal Society of Chemistry [572] and [586], Wiley and Sons [579] and [558]; Springer Nature [555] and Elsevier (2018) [580].…”

Section: Vanadium Oxidementioning

confidence: 99%

“…When V2O5 nanostructures are exposed to reducing gases, V 5+ species are partially reduced to V 4+ , originating formation of oxygen vacancies thus increasing conductivity of the sensor (this phenomena can be optically observed due to a material colour change from yellow to dark blue) [572,584] Another interesting approach was presented by Liang et al [580] that investigated sensing properties of VO2 decorated with gold nanoparticles to NO2 gas. It was found that VO2 nanowires decorated with the smallest Au nanoparticles exhibit sensitivity to NO2 of 0.5 to 5 ppm.…”

Section: Vanadium Oxidementioning

confidence: 99%

See 2 more Smart Citations

Metal oxide nanostructures for sensor applications

Nunes

Pimentel

Gonçalves

et al. 2019

Semicond. Sci. Technol.

261

119

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Human health, environmental protection and safety are just a few examples of current humankind main concerns, that drive the scientific community to develop sensors able to precisely monitor and alert to possible harms in real time. Over the years, semiconductor metal oxide-based materials have been largely employed as sensors dedicated to several applications, being particularly interesting at the nanometer scale, since it is largely known that smaller crystallite size enhances sensor's performance. Moreover, these materials are highly appealing as they can be produced by low-cost wet-chemical synthesis routes and are in general nontoxic, earth abundant and low-cost. This manuscript extensively reviews the recent developments of nanostructured semiconductor metal oxide sensors ranging from gas to humidity sensors, including ultraviolet (UV) sensors and biosensors. Zinc oxide (ZnO), titanium dioxide (TiO2), tungsten trioxide (WO3), copper oxide (CuO and Cu2O), tin oxide (SnO and SnO2), and vanadium oxide (VO2, V2O5)-based sensors either as nanoparticles or as continuous films/layers are described. Their sensing properties are correlated to size, shape, presence of defects, doping elements, amongst other relevant parameters. Different techniques and methods of fabricating these materials are addressed. The review is concluded with novel approaches for functionalization and future perspectives for sensor developments.

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Section: Vanadium Oxidementioning

confidence: 90%

Section: Vanadium Oxidementioning

confidence: 99%

Section: Vanadium Oxidementioning

confidence: 99%

See 1 more Smart Citation

Metal oxide nanostructures for sensor applications

Nunes

Pimentel

Gonçalves

et al. 2019

Semicond. Sci. Technol.

261

119

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“…Noble metal decorating can validly enhance the responsivity and selectivity of MOS sensors [ 50 , 51 , 52 , 53 , 54 ]. Some noble metal particles also increase recovery time [ 55 , 56 , 57 ]. When the surface of the material is decorated with a noble metal, some chemical reactions often occur at the micro level, while the change of resistance structure is observed at the macro level [ 58 , 59 , 60 ].…”

Section: The Methods To Improve the Propertiesmentioning

confidence: 99%

Improving Gas-Sensing Performance Based on MOS Nanomaterials: A Review

et al. 2021

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In order to solve issues of air pollution, to monitor human health, and to promote agricultural production, gas sensors have been used widely. Metal oxide semiconductor (MOS) gas sensors have become an important area of research in the field of gas sensing due to their high sensitivity, quick response time, and short recovery time for NO2, CO2, acetone, etc. In our article, we mainly focus on the gas-sensing properties of MOS gas sensors and summarize the methods that are based on the interface effect of MOS materials and micro–nanostructures to improve their performance. These methods include noble metal modification, doping, and core-shell (C-S) nanostructure. Moreover, we also describe the mechanism of these methods to analyze the advantages and disadvantages of energy barrier modulation and electron transfer for gas adsorption. Finally, we put forward a variety of research ideas based on the above methods to improve the gas-sensing properties. Some perspectives for the development of MOS gas sensors are also discussed.

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“…Surface sensitization is oen made to increase the sensing of V 2 O 5 /VO 2 by using noble metals or graphene. 3,13,23,24 Some nanocomposites also have been reported. [25][26][27][28] V 2 O 5 has also been deposited by many groups in porous silicon structure.…”

Section: Introductionmentioning

confidence: 99%