A facile and one-pot synthesis of pure and transition metals (M = Co &amp; Ni) doped WO3 nanoparticles for enhanced photocatalytic performance

Sivakarthik, P.; Thangaraj, V.; Parthibavarman, M.

doi:10.1007/s10854-016-6274-7

Cited by 36 publications

(11 citation statements)

References 15 publications

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“…Among other oxide materials, tungsten (VI) oxide (WO 3 ) is very promising n-type semiconductor. Due to relevant physical, photoelectrochemical and catalytic properties, WO 3 is used in lithium-ion batteries [4], electrochromic windows [5], solar energy conversion systems [6][7][8][9][10][11], volatile organic compounds (VOCs) and gas sensors [12]. The sensors based on WO 3 still suffer from high operating temperature, low sensitivity or high limit of detection (LOD).…”

Section: Introductionmentioning

confidence: 99%

Tuning the Photo-Luminescence Properties of WO3 Layers by the Adjustment of Layer Formation Conditions

et al. 2020

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In this research we have applied sol-gel synthesis for the deposition of tungsten (VI) oxide (WO3) layers using two different reductants (ethanol and propanol) and applying different dipping times. WO3 samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier Transform Infrared spectroscopy (FTIR), photoluminescence (PL) and time-resolved photoluminescence decay methods. Photoelectrochemical (PEC) behaviour of synthesized coatings was investigated using cyclic voltammetry in the dark and under illumination. Formation of different structures in differently prepared samples was revealed and significant differences in the PL spectra and PEC performance of the samples were observed. The results showed that reductant used in the synthesis and dipping time strongly influenced photo-electrochemical properties of the coatings. Correlation between the morphology, PL and PEC behaviour has been explained.

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Section: Introductionmentioning

confidence: 99%

Tuning the Photo-Luminescence Properties of WO3 Layers by the Adjustment of Layer Formation Conditions

et al. 2020

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“…When oxygen species are reacting with the reducing organic compounds, then the injection of electrons is narrowing 'the width' of the electron depletion layer, which is leading to the decrease in resistance of sensing layer. Corresponding chemical reactions between analyte-molecules and oxygen species are presented in Equations (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15) [51,52].…”

Section: Resultsmentioning

confidence: 99%

“…Among many other oxides, tungsten (VI) oxide (WO 3 ) is a very attractive material due to its relative chemical stability, robustness, inherent electrical conductivity, and good sensitivity towards various gaseous materials including many VOCs [4][5][6]. Various WO 3 -based structures are also used in lithium-ion batteries [7] and solar energy conversion systems [8][9][10][11][12]. The gas-and/or VOC-sensing and photoelectrochemical properties of WO 3 are highly dependent on the deposition method and conditions of sensitive layer formation.…”

Section: Introductionmentioning

confidence: 99%

Selectivity of Tungsten Oxide Synthesized by Sol-Gel Method Towards Some Volatile Organic Compounds and Gaseous Materials in a Broad Range of Temperatures

et al. 2020

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In this research, the investigation of sensing properties of non-stoichiometric WO3 (WO3−x) film towards some volatile organic compounds (VOC) (namely: Methanol, ethanol, isopropanol, acetone) and ammonia gas are reported. Sensors were tested at several temperatures within the interval ranging from a relatively low temperature of 60 up to 270 °C. Significant variation of selectivity, which depended on the operational temperature of sensor, was observed. Here, the reported WO3/WO3–x-based sensing material opens an avenue for the design of sensors with temperature-dependent sensitivity, which can be applied in the design of new gas- and/or VOC-sensing systems that are dedicated for the determination of particular gas- and/or VOC-based analyte concentration in the mixture of different gases and/or VOCs, using multivariate analysis of variance (MANOVA).

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“…The ultraviolet-visible diffuse reflectance spectroscopy (DRS) was used to characterize the degree of electron-hole pairs generated by the samples and the band gap width. As shown in Figure 9a, the ultraviolet-visible (UV) absorption edge wavelength was observed at the wavelength of 375 nm, which is the inherent absorption band gap of ZnO (3.2 eV) [42]. The plasma modification process did not affect the change of the main absorption band of ZnO, the main absorption band of ZnO is shorter than 400 nm, and the absorption band of the T-4 sample was very similar to that of pure ZnO.…”

Section: Photocatalytic Degradation Kineticsmentioning

confidence: 99%

Enhancing Photocatalytic Activity of ZnO Nanoparticles in a Circulating Fluidized Bed with Plasma Jets

Huang

Hong

et al. 2021

Catalysts

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In this work, zinc oxide (ZnO) nanoparticles were modified in a circulating fluidized bed through argon and hydrogen (Ar–H) alternating-current (AC) arc plasma, which shows the characteristics of nonequilibrium and equilibrium plasma at the same time. In addition, a circulating fluidized bed with two plasma jets was used for cyclic processing. The catalytic degradation performance on Rhodamine B (Rh B) by Ar–H plasma-modified ZnO and pure ZnO was tested in aqueous media to identify the significant role of hydrogen atoms in Rh B degradation mechanism. Meanwhile, the effects of plasma treatment time on the morphology, size and photocatalytic performance of ZnO were also investigated. The results demonstrated that ZnO after 120-min treatment by Ar–H plasma showed Rh B photocatalytic degradation rate of 20 times greater than that of pure ZnO and the reaction follows a first kinetics for the Rh B degradation process. Furthermore, the photocatalyst cycle experiment curve exhibited that the modified ZnO still displays optimum photocatalytic activity after five cycles of experiment. The improvement of photocatalytic activity and luminescence performance attributes to the significant increase in the surface area, and the introduction of hydrogen atoms on the surface also could enhance the time of carrier existence where the hydrogen atoms act as shallow donors.

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A facile and one-pot synthesis of pure and transition metals (M = Co & Ni) doped WO3 nanoparticles for enhanced photocatalytic performance

Cited by 36 publications

References 15 publications

Tuning the Photo-Luminescence Properties of WO3 Layers by the Adjustment of Layer Formation Conditions

Tuning the Photo-Luminescence Properties of WO3 Layers by the Adjustment of Layer Formation Conditions

Selectivity of Tungsten Oxide Synthesized by Sol-Gel Method Towards Some Volatile Organic Compounds and Gaseous Materials in a Broad Range of Temperatures

Enhancing Photocatalytic Activity of ZnO Nanoparticles in a Circulating Fluidized Bed with Plasma Jets

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