Synthesis and characterization of chemically grown electrochromic tungsten oxide

Kharade, Rohini R.; Mane, S.R.; Mane, Rahul M.; Patil, P. S.; Bhosale, Popatrao N.

doi:10.1007/s10971-010-2291-9

Cited by 43 publications

(20 citation statements)

References 19 publications

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“…Tungsten oxide (WO 3 ) shows photocatalytic activity under visible light. The experimental band gap energy (Eg) of WO 3 from optical and photocurrent measurements varies from 2.5 to 3.0 eV, which absorb light at about 480 nm ,. Compared with mixed metal oxides and doped oxides, tungsten oxides are prepared via a simple method.…”

Section: Introductionmentioning

confidence: 99%

Template‐Free Synthesis of Mesoporous Tungsten Oxide Nanostructures and Its Application in Photocatalysis and Adsorption Reactions

Farjood

Zanjanchi

2019

ChemistrySelect

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The template-free synthesis of mesoporous tungsten oxide nanostructure (WO 3 ) via a hydrothermal process is reported in this contribution. The structural properties were characterized by X-ray diffraction (XRD), FT-IR, scanning electron microscopy (SEM), Transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), N 2 -adsorption-desorption analysis (BJH), differential scanning calorimetry (DSC) measurement. It was found that the prepared WO 3 possesses a pore diameter about 19 nm and a surface area 67 m 2 /g. This compound is converted from hexagonal crystalline phase to a triclinic one when heated at the temperatures higher than 250°C. The photocatalytic activity of WO 3 was inspected during the degradation of methylene blue under the irradiation of visiblelight in presence of hydrogen peroxide. Our findings showed that the hexagonal WO 3 bare considerably higher photocatalytic activity compared to that of the commercial and the triclinic ones. Therefore, the crystalline phase of WO 3 has an obvious effect on its photocatalytic performance. The hexagonal WO 3 is capable to adsorb a high concentration of MB within in very short time too.

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Section: Introductionmentioning

confidence: 99%

Template‐Free Synthesis of Mesoporous Tungsten Oxide Nanostructures and Its Application in Photocatalysis and Adsorption Reactions

Farjood

Zanjanchi

2019

ChemistrySelect

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“…The electrochromic (EC) effect, i.e. a reversible color change induced by an electric field of WO 3 was first reported by Deb in 1969 [3] and is considered the best material for EC applications due to its high coloration efficiency [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…One of such is that by Schirmer et al [8], in which they proposed that the optical absorption of the films is caused by the small polaron (SP), or transitions between two non-equivalent sites of tungsten ( 3 ) during coloration and an electron and cation deintercalation reaction during bleaching [7,9] according to the following equation: Conducting polymeric materials like polypyrrole (PPy), Polyaniline (PANI) and polythiopheres etc. have been considered as EC materials but among these, PANI has emerged as the most promising active materials for electrochromic devices due to its high capacitive characteristics, relative ease in preparation, good environmental stability and tuneable conductivity [10].…”

Section: Introductionmentioning

confidence: 99%

Electrochromic and electrochemical capacitive properties of tungsten oxide and its polyaniline nanocomposite films obtained by chemical bath deposition method

Nwanya

Jafta

Ejikeme

et al. 2014

Electrochimica Acta

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Polyanine and its nanocomposite WO 3 /PANI films were deposited on Fluorine doped tin oxide (FTO) glass slides by simple Chemical Bath Deposition Method. The morphology and crystalline structure of the composite film was studied using Atomic force (AFM) and Scanning Electron Microscopy, while the electrochemical capacitive properties were determined using Cyclic Voltammetry (CV), chronopotentiometry (CP) and electrochemical impedance spectroscopy (EIS). The WO 3 / PANI nano-composite exhibited multiple colors (electrochromism) during the CV scans, from brownish green to transparent to light green then back to brownish green. Surprisingly, the integration of the PANI with the WO 3 led to synergistic performance of nanohybrid wherein a true electrochemical double layer capacitor was obtained. Also, interestingly and unlike literature reports, the CBD method led to excellent capacitance retention (> 98%) of the PANI even at 1000 continuous cycles. This work demonstrates that simple CBD can be used to get WO 3 / PANI films that give good electrochromism and pseudocapacitance comparable to the ones obtained by other methods. Hence the obtained nanocomposite film of WO 3 / PANI can be a promising material for electrochromic and energy storage applications.

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“…Reacting solutions were taken in glass container having capacity 150 cm 3 . The reaction container was kept in cylindrical water pot of 20 cm in diameter and 10 cm in height.…”

Section: Constant Temperature Assemblymentioning

confidence: 99%

“…Interest in the use of photo electrochemical (PEC) solar cells for low cost energy conversion has led to an extensive research in the search for novel and suitable thin film semiconductor materials [1][2][3][4][5]. The techniques presently used for synthesis of mixed metal chalcogenide and oxide thin films are CBD, MOCVD, spin coating, electro deposition, spray pyrolysis, sputtering, crystal growth, and chemical bath deposition [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Arrested Precipitation Technique for Synthesis of Chalcogenide and Oxide Thin Films

Bhosale¹

2015

J Adv Chem Eng

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Synthesis and characterization of chemically grown electrochromic tungsten oxide

Cited by 43 publications

References 19 publications

Template‐Free Synthesis of Mesoporous Tungsten Oxide Nanostructures and Its Application in Photocatalysis and Adsorption Reactions

Template‐Free Synthesis of Mesoporous Tungsten Oxide Nanostructures and Its Application in Photocatalysis and Adsorption Reactions

Electrochromic and electrochemical capacitive properties of tungsten oxide and its polyaniline nanocomposite films obtained by chemical bath deposition method

Arrested Precipitation Technique for Synthesis of Chalcogenide and Oxide Thin Films

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