A Novel Approach for the Synthesis of Tungsten Trioxide Nanostructures

Shah, Mansoor Ul Hassan; Muzyyan, N.

doi:10.4197/sci.21-1.11

Cited by 4 publications

(2 citation statements)

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“…The SEM images confirmed that the WO 3 was nearly spherical in shape with an average grain size of approximately 20-30 nm. These nanoparticles are less than those reported in the references [42,43] and are also similar to those reported in references [44][45][46][47]. The effect of reaction time plays a marvelous role in the morphology of nanoparticles.…”

Section: Fesem Morphologies Of the Synthesized Nanoparticles Field Esupporting

confidence: 85%

Novel Approach: Tungsten Oxide Nanoparticle as a Catalyst for Malonic Acid Ester Synthesis via Ozonolysis

Wasmi

Al-Amiery

Kadhum

et al. 2014

Journal of Nanomaterials

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Malonic acid ester was synthesized via the one-step ozonolysis of palm olein. Malonic acid ester was spectroscopically characterized using gas chromatography mass spectroscopy (GC-MS). Tungsten oxide nanoparticles were used as the catalyst, which was characterized via X-ray powder diffraction (XRD) and field emission scanning electron microscopy (FE-SEM). Tungsten oxide provided several advantages as a catalyst for the esterification malonic acid such as simple operation for a precise ozonation method, an excellent yield of approximately 10%, short reaction times of 2 h, and reusability due to its recyclability.

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Section: Fesem Morphologies Of the Synthesized Nanoparticles Field Esupporting

confidence: 85%

Novel Approach: Tungsten Oxide Nanoparticle as a Catalyst for Malonic Acid Ester Synthesis via Ozonolysis

Wasmi

Al-Amiery

Kadhum

et al. 2014

Journal of Nanomaterials

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“…A number of techniques have been developed to synthesise the tungsten oxide nanoparticles such as acid precipitation, modified plasma-arc gas condensation, sol-gel, ion-exchange, thermal evaporation and micro emulsion methods, and through a hydrothermal route. [12][13][14] Crystalline WO 3 has a better electrical pathway for carrier collection and a better band-gap energy (~2.7 eV) when compared with amorphous WO 3 . Electrochromic materials can reversibly and persistently change their optical properties by the application of an electrical voltage, which can be used as energy-saving smart windows to tune indoor lights by changing the windows colours.…”

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confidence: 99%

Stability of Tungsten Oxide Nanoparticles in Different Media

Ragunathan

Krishnan

Kamaludeen³

2015

Journal of Chemical Research

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Tungsten oxide (WO3) nanoparticles were synthesised by a simple chemical precipitation method in various media, such as acidic, basic and neutral. Hydrochloric acid and sodium hydroxide were used to maintain the different pH levels and tungstic acid was used as the precursor for the synthesis of tungsten oxide. The resultant nanoparticles were studied by different characterisation techniques. Powder X-ray diffraction shows that the average crystallite size of the WO3 is about 13 nm and exhibits stable orthorhombic phase for different pH values. Particle size and the surface morphology of the synthesised material were studied by TEM analysis. Chemical composition and surface area of the nanoparticles were studied by FTIR and BET measurements. Optical properties of the synthesised nanoparticles were studied by UV-Vis absorption and photoluminescence spectroscopy. Band gap (~2.7 eV) of the synthesised WO3 was investigated from the optical absorption spectra. At room temperature, a strong PL blue emission peak at ~440 nm was observed for the synthesised tungsten oxide nanomaterials. Thermal stability of the synthesised material was studied by TG/DTA analysis. Cyclic voltammetry illustrated the electrochemical response of the WO3 nanoparticles using KCl as electrolyte. The peak separation of 182 mV, 153 mV and 77 mV for the acidic, basic and neutral media were observed. Thus it was confirmed that, tungsten oxide has a low peak separation, a fast reaction rate and electron transfer rate in neutral medium.

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Laser ablation-assisted synthesis of tungsten sub-oxide (W17O47) nanoparticles in water: effect of laser fluence

Famili

Dorranian

2020

Opt Quant Electron

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A Novel Approach for the Synthesis of Tungsten Trioxide Nanostructures

Cited by 4 publications

References 0 publications

Novel Approach: Tungsten Oxide Nanoparticle as a Catalyst for Malonic Acid Ester Synthesis via Ozonolysis

Novel Approach: Tungsten Oxide Nanoparticle as a Catalyst for Malonic Acid Ester Synthesis via Ozonolysis

Stability of Tungsten Oxide Nanoparticles in Different Media

Laser ablation-assisted synthesis of tungsten sub-oxide (W17O47) nanoparticles in water: effect of laser fluence

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