Hydrothermal synthesis and gas sensing properties of WO3H2O with different morphologies

Zeng, Wen; Li, Yanqiong; Miao, Bin; Pan, Kangguan

doi:10.1016/j.physe.2013.09.005

Cited by 40 publications

(13 citation statements)

References 32 publications

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“…1 Tungsten oxide (WO 3 ), a popular n-type semiconductor with a relatively wide band gap of 2.6 eV, for its sensitive dependence of electrical resistance on exposed atmosphere, is found to be an excellent chemical sensor material. [2][3][4][5][6][7][8][9][10][11][12][13][14] In fact, it has exhibited an excellent response to a variety of poisonous, explosive and volatile organic compounds (VOCs) including NO x , 2-4 H 2 S, 5-6 CO, 7 H 2 , 8 ethanol, [9][10][11] acetone, [12][13][14] etc. Consider the assembly of 0D nanoparticle, WO 3 hollow nanospheres provide high surface area for chemical reaction and porous structure for effective gas diffusion and therefore exhibit better sensor performance than the bulk WO 3 .…”

Section: Introductionmentioning

confidence: 99%

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Yao

Yin

et al. 2016

ACS Appl. Mater. Interfaces

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Ag nanoparticle (NP)-sensitized WO3 hollow nanospheres (Ag-WO3-HNSs) are fabricated via a simple sonochemical synthesis route. It is found that the Ag-WO3-HNS shows remarkable performance in gas sensors. Field-emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) images reveal that the Agx-WO3 adopts the HNS structure in which WO3 forms the outer shell framework and the Ag NPs are grown on the inner wall of the WO3 hollow sphere. The size of the Ag NPs can be controlled by adjusting the addition amount of WCl6 during the reaction. The sensor Agx-WO3 exhibits extremely high sensitivity and selectivity toward alcohol vapor. In particular, the Ag(15nm)-WO3 sensor shows significantly lower operating temperature (230 °C), superior detection limits as low as 0.09 ppb, and faster response (7 s). Light illumination was found to boost the sensor performance effectively, especially at 405 and 900 nm, where the light wavelength resonates with the absorption of Ag NPs and the surface oxygen vacancies of WO3, respectively. The improved sensor performance is attributed to the localized surface plasmon resonance (LSPR) effect.

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Section: Introductionmentioning

confidence: 99%

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Yao

Yin

et al. 2016

ACS Appl. Mater. Interfaces

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“…WO 3 · H 2 O nanosheets were synthesized by a hydrothermal method as reported in a previous work38. In a typical process, 0.66 g of sodium tungstate (Na 2 WO 4 · 2H 2 O) and 0.4 g of citric acid were mixed and dissolved into 40 mL of distilled water under 10 min of magnetic stirring to form a transparent solution.…”

Section: Methodsmentioning

confidence: 99%

Water photolysis effect on the long-term stability of a fiber optic hydrogen sensor with Pt/WO3

Zhong

Yang

Huang

et al. 2016

Sci Rep

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One of the technological challenges for hydrogen sensors is long-term stability and reliability. In this article, the UV-light irradiation was introduced into the hydrogen sensing process based on water photolysis effect of Pt/WO3. Ascribing to that, fiber optic hydrogen sensor with Pt/WO3 nanosheets as the sensing element was demonstrated with significantly improved performance of stability. Under UV irradiation, the hydrogen sensor exhibits higher sensitivity and resolution together with a smaller error range than that without UV irradiation. The enhanced performance could be attributed to the effective decomposition of water produced in the hydrogen sensing process due to the water photolysis effect of Pt/WO3. The influence of the water on stability was evaluated using experimental results, and the UV irradiation to remove water was analysed by theoretical and FT-IR spectra. This work provides new strategy of UV-light irradiation to promote the long-term stability of hydrogen sensor using Pt/WO3 as the sensing element.

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“…When it touches reductive gas, its conductivity will increase, while when it is exposed to oxidative gas, it decreases. By having the data of the conductivity changes, we can realize the detection of specific gases, like H 2 , H 2 S [ 198 ], CO, NH 3 [ 199 ], NO x [ 200 , 201 ], and some organic gases [ 202 , 203 ]. For instance, Liang et al [ 203 ] produced ultra-thin WO 3 nanosheets with dominant {002} crystal facets that have been proven to have improved xylene-sensing performance.…”

Section: Other Applications Of Tungsten Oxides-based Materialsmentioning

confidence: 99%

Advances in Electrochemical Energy Devices Constructed with Tungsten Oxide-Based Nanomaterials

Han

Shi

2021

Nanomaterials

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Tungsten oxide-based materials have drawn huge attention for their versatile uses to construct various energy storage devices. Particularly, their electrochromic devices and optically-changing devices are intensively studied in terms of energy-saving. Furthermore, based on close connections in the forms of device structure and working mechanisms between these two main applications, bifunctional devices of tungsten oxide-based materials with energy storage and optical change came into our view, and when solar cells are integrated, multifunctional devices are accessible. In this article, we have reviewed the latest developments of tungsten oxide-based nanostructured materials in various kinds of applications, and our focus falls on their energy-related uses, especially supercapacitors, lithium ion batteries, electrochromic devices, and their bifunctional and multifunctional devices. Additionally, other applications such as photochromic devices, sensors, and photocatalysts of tungsten oxide-based materials have also been mentioned. We hope this article can shed light on the related applications of tungsten oxide-based materials and inspire new possibilities for further uses.

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Hydrothermal synthesis and gas sensing properties of WO3H2O with different morphologies

Cited by 40 publications

References 32 publications

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Water photolysis effect on the long-term stability of a fiber optic hydrogen sensor with Pt/WO3

Advances in Electrochemical Energy Devices Constructed with Tungsten Oxide-Based Nanomaterials

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Hydrothermal synthesis and gas sensing properties of WO3H2O with different morphologies

Cited by 40 publications

References 32 publications

Ag Nanoparticle-Sensitized WO3 Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Ag Nanoparticle-Sensitized WO3 Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Water photolysis effect on the long-term stability of a fiber optic hydrogen sensor with Pt/WO3

Advances in Electrochemical Energy Devices Constructed with Tungsten Oxide-Based Nanomaterials

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Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors

Ag Nanoparticle-Sensitized WO₃ Hollow Nanosphere for Localized Surface Plasmon Enhanced Gas Sensors