Highly sensitive NO2 sensors using lamellar-structured WO3 particles prepared by an acidification method

Kida, Tetsuya; Nishiyama, Aya; Yuasa, Masayoshi; Shimanoe, Kengo; Yamazoe, Noboru

doi:10.1016/j.snb.2008.09.056

Cited by 148 publications

(63 citation statements)

References 39 publications

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“…8 to the nanowires. Nevertheless, considering the results reported for the tungsten oxide nanoparticles and sputtered films [17,27], the values of response time for the one-dimensional nanowires or nanorods are relatively satisfactory.…”

Section: Gas-response Measurementsmentioning

confidence: 95%

Solvothermally synthesized tungsten oxide nanowires/nanorods for NO2 gas sensor applications

Qin

Wang

et al. 2011

Journal of Alloys and Compounds

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Section: Gas-response Measurementsmentioning

confidence: 95%

Solvothermally synthesized tungsten oxide nanowires/nanorods for NO2 gas sensor applications

Qin

Wang

et al. 2011

Journal of Alloys and Compounds

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“…WO 3 , an n-type semiconductor with an excellent electrochromic, photochromic and gasochromic properties has been extensively used in variety of applications, including gas and temperature sensing, catalysis, electrochromic windows and displays, flat panel displays, solar energy devices and so on [3]. Many processes have been developed for the synthesis of WO 3 nanostructures, e.g., hydrothermal route [4], surfactant mediated method [5] sol-gel [6], chemical co precipitation [7], acidification method [8], and electrodeposition method [9]. Compared with the above processes, the microwave method has sparked much interest due to their operation simplicity, effective, low-cost route to synthesis, less time consuming (about 10 min), and for large-scale production [10].…”

Section: Introductionmentioning

confidence: 99%

Influence of Zn doping on structural, optical and photocatalytic activity of WO3 nanoparticles by a novel microwave irradiation technique

Madhan¹,

Parthibavarman²,

Rajkumar³

et al. 2015

J Mater Sci: Mater Electron

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In the present work we have successfully synthesized pure and zinc (Zn) doped WO 3 nanoparticles by microwave irradiation method for the first time. Powder X-ray diffraction results reveal that the WO 3 doped with Zn concentration from 0 to 10 wt% crystallizes in monoclinic structure and the results are in good agreement with the standard JCPDS data (card no: 83-0950). Field emission scanning electron microscopy studies illustrate that both the pristine and Zn doped WO 3 form in spherical shaped morphology with an average diameter of 48-36 nm, which is in good agreement with the average crystallite sizes calculated by Scherrer's formula. A considerable red shift in the absorbing band edge and decrease the band gap energy from 2.93 to 2.71 eV for Zn doped samples was observed by using UV-Vis spectra analysis. The defects in crystal and oxygen deficiencies were analyzed by photoluminescence spectra analysis. The photocatalytic activities of the pure and Zn doped WO 3 samples were evaluated by the degradation of methylene blue rhodamine B in an aqueous solution under visible light irradiation. The photocatalytic activity and reusability of Zn (10 wt%) doped WO 3 was much higher than that of the pure WO 3 . The improvement mechanism by Zn doping was also discussed.

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“…The sensitivity of a surface to a gas can be as low as parts per billion (ppb) [2][3][4][5]. It is highly desirable that metal oxide semiconductor sensors have a large surface area, so as to adsorb as much of the target analyte as possible on the surface, giving a stronger and more measurable response (especially at low concentrations).…”

Section: Introductionmentioning

confidence: 99%

Metal oxide semiconductor gas sensors in environmental monitoring

Binions¹,

Naik²

2013

Semiconductor Gas Sensors

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Metal oxide semiconductor gas sensors are utilised in a variety of different roles and industries. They are relatively inexpensive compared to other sensing technologies, robust, lightweight, long lasting and benefit from high material sensitivity and quick response times. They have been used extensively to measure and monitor trace amounts of environmentally important gases such as carbon monoxide and nitrogen dioxide. In this review the nature of the gas response and how it is fundamentally linked to surface structure is explored. Synthetic routes to metal oxide semiconductor gas sensors are also discussed and related to their affect on surface structure. An overview of important contributions and recent advances are discussed for the use of metal oxide semiconductor sensors for the detection of a variety of gases-CO, NO x , NH 3 and the particularly challenging case of CO 2 . Finally a description of recent advances in work completed at University College London is presented including the use of selective zeolites layers, new perovskite type materials and an innovative chemical vapour deposition approach to film deposition.

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Highly sensitive NO2 sensors using lamellar-structured WO3 particles prepared by an acidification method

Cited by 148 publications

References 39 publications

Solvothermally synthesized tungsten oxide nanowires/nanorods for NO2 gas sensor applications

Solvothermally synthesized tungsten oxide nanowires/nanorods for NO2 gas sensor applications

Influence of Zn doping on structural, optical and photocatalytic activity of WO3 nanoparticles by a novel microwave irradiation technique

Metal oxide semiconductor gas sensors in environmental monitoring

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