Relevant bibliographies by topics / Mesoporous amorphous WO3 (a-WO3)

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Mesoporous amorphous WO3 (a-WO3)'

Author: Grafiati
Published: 28 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Mesoporous amorphous WO3 (a-WO3)"

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Shang, Fu Liang, Hai Tao Yang, Wei Lin Lin, and Ling Gao. "Preparation and Electrochromic Properties of Mesoporous WO3 Film." Advanced Materials Research 79-82 (August 2009): 867–70. http://dx.doi.org/10.4028/www.scientific.net/amr.79-82.867.

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The WO3 film was prepared by dip coating method with WCl6 as the soure of tungsten and P123 as the structure-directing agent. The crystalline phase and microstructure of the film were characterized through XRD and TEM techniques, respectively. It was found the film annealed at 300°C for 4h mainly was amorphous WO3 with a little monoclinic WO3. The TEM micrographs revealed the film was partly ordered mesoporous and the mean pore diameter was about 5nm. The measurements of the cyclic voltammetry suggested that the WO3 film had a good electrochromic reversibility performance. The ratio of amount
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Zou, Yidong, Shibo Xi, Tao Bo, et al. "Mesoporous amorphous Al2O3/crystalline WO3 heterophase hybrids for electrocatalysis and gas sensing applications." Journal of Materials Chemistry A 7, no. 38 (2019): 21874–83. http://dx.doi.org/10.1039/c9ta08633a.

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Unprecedented mesoporous amorphous–crystalline Al<sub>2</sub>O<sub>3</sub>/WO<sub>3</sub> exhibit superior HER activity with addition of Al<sub>2</sub>O<sub>3</sub> (&gt;2%) while lower contents (&lt;2%) show excellent sensing performance owing to hetero-interface and lattice distortion of the octahedron crystal.
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Fuku, Kojiro, Yuta Miyase, Yugo Miseki, Takahiro Gunji, and Kazuhiro Sayama. "WO3/BiVO4 photoanode coated with mesoporous Al2O3 layer for oxidative production of hydrogen peroxide from water with high selectivity." RSC Adv. 7, no. 75 (2017): 47619–23. http://dx.doi.org/10.1039/c7ra09693c.

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A mesoporous and amorphous Al<sub>2</sub>O<sub>3</sub> layer coated on WO<sub>3</sub>/BiVO<sub>4</sub> photoanode significantly facilitated inhibiting the oxidative degradation of generated H<sub>2</sub>O<sub>2</sub> into O<sub>2</sub> on the photoanode, resulting in the achieving excellent H<sub>2</sub>O<sub>2</sub> selectivity.
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Zhang, Yinhai, Xiaoxue Liu, Ruyu Zhao, et al. "The Green Preparation of Mesoporous WO3/SiO2 and Its Application in Oxidative Desulfurization." Catalysts 14, no. 2 (2024): 103. http://dx.doi.org/10.3390/catal14020103.

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Recently, supported WO3-based catalysts have been widely used in oxidative desulfurization (ODS) due to their advantages of easy separation, high activity, and being environment-friendly. In this work, supported mesoporous WO3/SiO2 catalysts have been prepared using an incipient-wetness impregnation method with agricultural waste rice husks as both a silicon source and mesoporous template, and phosphotungstic acid as a tungsten source. The effects of different calcination temperatures and WO3 loadings on the ODS performance of samples are studied, and the appropriate calcination temperature an
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Zhang, Cheng, Chuning Jiang, Xiaohong Zheng, and Xin Hong. "Medium-Low-Temperature NO2 Sensor Based on YSZ Solid Electrolyte and Mesoporous WO3 Sensing Electrode for Detection of Vehicle Emissions." Nano 16, no. 07 (2021): 2150083. http://dx.doi.org/10.1142/s1793292021500831.

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A mixed potential-type NO2 sensor was fabricated using yttria-stabilized zirconia (YSZ) as the electrolyte and mesoporous WO3 as the sensing electrode for the detection of NO2 in vehicle exhausts. The mesoporous WO3 with a diameter of 7 nm was synthesized using the hard template method. The sensor showed excellent performance in the detection of 30–500[Formula: see text]ppm of NO2 at 300∘C and 500∘C. However, commercial WO3 only operate well at 500∘C. The response of the mesoporous WO3 was higher and the test temperature was lower compared to that of commercial WO3. XPS combined with NO2-TPD w
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Cruz-Leal, M., O. Goiz, F. Chávez, et al. "Study of the Thermal Annealing on Structural and Morphological Properties of High-Porosity A-WO3 Films Synthesized by HFCVD." Nanomaterials 9, no. 9 (2019): 1298. http://dx.doi.org/10.3390/nano9091298.

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High-porosity nanostructured amorphous tungsten OXIDE (a-WO3) films were synthesized by a Hot Filament Chemical Vapor Deposition technique (HFCVD) and then transformed into a crystalline WO3 by simple thermal annealing. The a-WO3 films were annealed at 100, 300, and 500 °C for 10 min in an air environment. The films were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), micro-Raman spectroscopy, high-resolution transmission electron microscopy (HR-TEM), and UV–vis spectroscopy. Results revealed that the a-WO3 films were highly porous, composed of cauliflower-like st
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Liang, Yuan-Chang, and Che-Wei Chang. "Preparation of Orthorhombic WO3 Thin Films and Their Crystal Quality-Dependent Dye Photodegradation Ability." Coatings 9, no. 2 (2019): 90. http://dx.doi.org/10.3390/coatings9020090.

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Direct current (DC) magnetron sputtering deposited WO3 films with different crystalline qualities were synthesized by postannealing at various temperatures. The in-situ DC sputtering deposited WO3 thin film at 375 °C exhibited an amorphous structure. The as-grown WO3 films were crystallized after annealing at temperatures of 400–600 °C in ambient air. Structural analyses revealed that the crystalline WO3 films have an orthorhombic structure. Moreover, the crystallite size of the WO3 film exhibited an explosive coarsening behavior at an annealing temperature above 600 °C. The density of oxygen
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de Wijs, G. A., and R. A. de Groot. "Amorphous WO3: a first-principles approach." Electrochimica Acta 46, no. 13-14 (2001): 1989–93. http://dx.doi.org/10.1016/s0013-4686(01)00377-2.

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Brei, V. V., O. V. Melezhyk, S. V. Prudius, G. M. Tel'biz, and O. I. Oranska. "Study of the Acid Site Structure on the WO3/ZrO2 Surface." Adsorption Science & Technology 23, no. 2 (2005): 109–14. http://dx.doi.org/10.1260/0263617054037754.

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The IR and UV—vis diffuse reflectance spectra of mesoporous WO3/ZrO2 are discussed and a scheme proposed for the acid site structure on the WO3/ZrO2 surface. The high Brönsted acidity of WO3/ZrO2 (H0 ≤ −11.38) can be explained by the formation of large zirconium polytungstate species such as [≡ Zr61/2+W66+O202−]− H+ on the WO3/ZrO2 surface.
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Zhang, Guanguang, Kuankuan Lu, Xiaochen Zhang, et al. "Effects of Annealing Temperature on Optical Band Gap of Sol-gel Tungsten Trioxide Films." Micromachines 9, no. 8 (2018): 377. http://dx.doi.org/10.3390/mi9080377.

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Tungsten trioxide (WO3) is a wide band gap semiconductor material that is used as an important electrochromic layer in electrochromic devices. In this work, the effects of the annealing temperature on the optical band gap of sol-gel WO3 films were investigated. X-ray Diffraction (XRD) showed that WO3 films were amorphous after being annealed at 100 °C, 200 °C and 300 °C, respectively, but became crystallized at 400 °C and 500 °C. An atomic force microscope (AFM) showed that the crystalline WO3 films were rougher than the amorphous WO3 films (annealed at 200 °C and 300 °C). An ultraviolet spect
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Dissertations / Theses on the topic "Mesoporous amorphous WO3 (a-WO3)"

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Trofimov, A. O., E. V. Kolobkova, E. V. Sohovich, and V. S. Zemko. "Electrochromic Film Based on a-WO3 Obtained by Sol-gel." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35386.

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The influence of changes in the conditions of sol-gel method on the thermal characteristics and the structure electrochromic (EC) а-WO3 films. DSC data showed greater sensitivity of the structure to the pe-culiarities of the drying of the product poliperoxo-tungstic acid. The Films were transparent over a wide range (Eg  2,5 eV). All compositions were amorphous as measured by X-rays diffraction. Based on the IR and Raman spectroscopy dates was concluded the presence in the structure of amorphous transparent glassy semiconductor a-WO3 predominantly tetrahedral [WO4] groups. The precursor produ
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García, Cañadas Jorge. "Estudio de los procesos de intercalación en materiales electrómicos (a-WO3, polímeros conductores y viológenos)." Doctoral thesis, Universitat Jaume I, 2006. http://hdl.handle.net/10803/10407.

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This thesis presents thermodynamic studies performed by electrochemical methods (cyclic voltammetry, electrochemical impedance and chronopotenciometry) in three of the most important electrochromic materials: a-WO3, conducting polymers and viologens. Electrochromic materials are very promising as a low-consuming technology. By incorporating these materials in windows of buildings or vehicles, approximately a 30% of the consumed energy in these systems can be saved.<br/>Regarding the a-WO3, apart from other contributions, a new model based on lattice distortions, able to explain the intercalati
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Book chapters on the topic "Mesoporous amorphous WO3 (a-WO3)"

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Olaitan Kolawole, Funsho, Shola Kolade Kolawole, Luis Bernardo Varela, Adebayo Felix Owa, Marco Antonio Ramirez, and André Paulo Tschiptschin. "Diamond-Like Carbon (DLC) Coatings for Automobile Applications." In Engineering Applications of Diamond [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.95063.

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Diamond-like carbon (DLC) coatings are amorphous carbon material which exhibits typical properties of diamond such as hardness and low coefficient of friction, characterized based on the sp3 bonded carbon and structure. The proportion of sp2 (graphetically) and sp3 (diamond-like) determines the properties of the DLC. This coating can be applied to automobile engine component in an attempt to provide energy efficiency by reducing friction and wear. However, DLC coatings are faced with issues of thermal instability caused by increasing temperature in the combustion engine of a vehicle. Therefore
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Conference papers on the topic "Mesoporous amorphous WO3 (a-WO3)"

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Domaradzki, Jaroslaw, Michal Mazur, Damian Wojcieszak, Wiktoria Weichbrodt, and Des Gibson. "Analysis of the Impact of Heat Treatment and the Presence of Hydrogen on the Optical Properties of WO3 Thin Films Prepared by EBE." In Optical Interference Coatings. Optica Publishing Group, 2025. https://doi.org/10.1364/oic.2025.mb.1.

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The paper presents the results of a study of the optical and gasochromic properties of WO3 thin films fabricated by electron beam evaporation. After deposition, the films were heated at 800 °C and then a Pd layer was deposited to the surface. Structural studies showed that after annealing, the structure of the coating changed from amorphous to crystalline The study of optical properties was performed by analyzing refractive index spectra. It was found that annealing causes an increase in refractive index values. The annealed layers were then subjected to a study of gasochromic properties in th
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Koshida, N., O. Tomita, and Y. Iketsu. "A High-Contrast Inorganic Ion Resist Using Amorphous WO3 and MoO3." In 1985 Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 1985. http://dx.doi.org/10.7567/ssdm.1985.a-5-8.

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Shmyreva, T., and V. Britun. "WC-Co Detonation Coatings Having a Hybrid Amorphous-Nanocrystalline Structure Display Improved Properties." In ITSC 1997, edited by C. C. Berndt. ASM International, 1997. http://dx.doi.org/10.31399/asm.cp.itsc1997p0925.

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Abstract X ray diffraction and transmission electron microscopy studies and measurements of hardness and void content were carried out for WC-20% Co coatings produced by detonation flame spraying at various oxygen/acetylene ratios in the detonating gas mixture. It was demonstrated that successive transition from (WC+Co) to (W2C+Co3W3C) to (W+CO7W6) occurs as the oxygen content in the mixture is increased, and that amorphous-nanocrystalline structures form in the coating. Two types of these hybrid structures were revealed, one including an amorphous metallic matrix containing precipitates of in
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