Comparison of the morphology and structure of WO3 nanomaterials synthesized by a sol-gel method followed by calcination or hydrothermal treatment

2012 ◽  
Vol 6 (4) ◽  
pp. 371-380 ◽  
Author(s):  
Diah Susanti ◽  
N. Stefanus Haryo ◽  
Hasnan Nisfu ◽  
Eko Prasetio Nugroho ◽  
Hariyati Purwaningsih ◽  
...  
Keyword(s):  
Hydrothermal Treatment ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Morphology And Structure

scholarly journals Green sol–gel route for selective growth of 1D rutile N–TiO2: a highly active photocatalyst for H2 generation and environmental remediation under natural sunlight

RSC Advances ◽  
2017 ◽  
Vol 7 (52) ◽  
pp. 33029-33042 ◽  
Author(s):  
Supriya K. Khore ◽  
Navya Vani Tellabati ◽  
Sanjay K. Apte ◽  
Sonali D. Naik ◽  
Prashant Ojha ◽  
...  
Keyword(s):  
Hydrothermal Treatment ◽  
Environmental Remediation ◽  
Sol Gel ◽  
Selective Growth ◽  
Gel Method ◽  
Natural Sunlight ◽  
Sol Gel Method ◽  
H2 Generation ◽  
Highly Active

We report selective growth of N–TiO2 1D nanorods using a green aqueous sol–gel method followed by hydrothermal treatment.

Fe3+-TiO2 photocatalysts prepared by combining sol–gel method with hydrothermal treatment and their characterization

2006 ◽  
Vol 180 (1-2) ◽  
pp. 196-204 ◽  
Author(s):  
Jiefang Zhu ◽  
Feng Chen ◽  
Jinlong Zhang ◽  
Haijun Chen ◽  
Masakazu Anpo
Keyword(s):  
Hydrothermal Treatment ◽  
Sol Gel ◽  
Tio2 Photocatalysts ◽  
Gel Method ◽  
Sol Gel Method

Effect of hydrothermal treatment on structural and photocatalytic properties of TiO2 synthesized by sol–gel method

2012 ◽  
Vol 411-412 ◽  
pp. 153-159 ◽  
Author(s):  
E. Pulido Melián ◽  
O. González Díaz ◽  
J.M. Doña Rodríguez ◽  
G. Colón ◽  
J.A. Navío ◽  
...  
Keyword(s):  
Hydrothermal Treatment ◽  
Sol Gel ◽  
Photocatalytic Properties ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Synthesis of TiO2 via modified sol-gel method and its use in carbonized medium-density fiberboard for toluene decomposition

BioResources ◽  
2019 ◽  
Vol 14 (3) ◽  
pp. 6516-6528
Author(s):  
Min Lee ◽  
Sang-Bum Park ◽  
Sung-Phil Mun
Keyword(s):  
Hydrothermal Treatment ◽  
Medium Density Fiberboard ◽  
Sol Gel ◽  
Analysis Data ◽  
Treatment Temperature ◽  
Medium Density ◽  
Gel Method ◽  
Sol Gel Method ◽  
Solution Type ◽  
Aqueous Conditions

A solution-type TiO2-based photocatalyst for the decomposition of volatile organic compounds was synthesized using a modified sol-gel method under either alcohol (ethanol or isopropanol) or aqueous conditions. Anatase-type TiO2 was successfully synthesized with additional hydrothermal treatment using either type of medium. However, the aqueous condition for TiO2 synthesis was more convenient for the formation of anatase-type TiO2. Based on X-ray diffraction analysis data, the optimal hydrothermal treatment temperature was 80 °C for anatase-type TiO2 formation; at temperatures below 80 °C or above 90 °C, mostly rutile-type TiO2 was formed. The synthesized anatase-type TiO2 solution was applied to the surface of carbonized medium-density fiberboard (c-MDF). The anatase-type TiO2 on c-MDF showed good maintenance of toluene decomposition performance even after repeated use for 14 weeks.

scholarly journals Study of the Bandgap of Synthesized Titanium Dioxide Nanoparticules Using the Sol-Gel Method and a Hydrothermal Treatment

2009 ◽  
Vol 4 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Sergio Valencia ◽  
Juan Miguel Marín ◽  
Gloria Restrepo
Keyword(s):  
Titanium Dioxide ◽  
Hydrothermal Treatment ◽  
Diffuse Reflectance Spectroscopy ◽  
Titanium Dioxide Nanoparticles ◽  
Anatase Phase ◽  
Sol Gel ◽  
Molar Ratio ◽  
Bandgap Energy ◽  
Gel Method ◽  
Sol Gel Method

In this work optical properties of titanium dioxide nanoparticles were studied. Titanium dioxide nanoparticles were synthesized by the sol-gel method followed by a hydrothermal treatment using tetraisopropyl orthotitanate (TIOT) and 2-propanol. The synthesized samples were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV/DRS) and nitrogen adsorption-desorption methods. The bandgap energy was obtained using the Kubelka-Munk reemission function. The catalyst synthesized with a molar ratio of R1 (water/TIOT) = 3.5 and R2 (2-propanol/TIOT) = 15 has a predominately anatase phase. It also has a high photo degradation of methyl orange compared to TiO2 Degussa P-25. A shift band gap energy of 3.27 was observed

scholarly journals Synthesis of ZnO Nanoparticles at Low Temperature by Hydrothermal Treatment Using the Sol-Gel Method

2019 ◽  
Vol 25 (S2) ◽  
pp. 2140-2141
Author(s):  
B. Murguía-Martínez ◽  
S.E. Borjas-García ◽  
A. Medina ◽  
L. Béjar ◽  
P. Martínez-Torres
Keyword(s):  
Low Temperature ◽  
Hydrothermal Treatment ◽  
Zno Nanoparticles ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Boehmite and Yttrium Oxide Coatings on Silicon Nitride From Aqueous Sols

1996 ◽  
Vol 432 ◽  
Author(s):  
Michael Buchta ◽  
Wei-Heng Shih
Keyword(s):  
Silicon Nitride ◽  
Aqueous Solutions ◽  
Hydrothermal Treatment ◽  
Yttrium Oxide ◽  
Sol Gel ◽  
Yttrium Nitrate ◽  
Oxide Coatings ◽  
Gel Method ◽  
Sol Gel Method

AbstractTo improve the processing of silicon nitride, boehmite and yttrium oxide were coated on silicon nitride particles by an aqueous sol-gel method. It is shown that boehmite and Y2O3 can be coated on Si3N4 particles from aqueous solutions. However, the Y2O3 coating is not as complete as boehmite coating. The coating of a yttria coating followed by a boehmite coating was attempted and the TEM showed a coating twice as thick as the Y2O3 or AlOOH coating. Hydrothermal treatment of yttrium nitrate hydrous hydroxide results in the formation and growth of Y(OH)3 fibers which can be calcined and transformed into Y2O3 fibers at 500°C.

scholarly journals Preparation of nanocrystalline composite TiO2-SnO2 powders using sol-gel method combined with hydrothermal treatment

2016 ◽  
Vol 10 (4) ◽  
pp. 249-256 ◽  
Author(s):  
Anna Marzec ◽  
Zbigniew Pędzich ◽  
Wojciech Maziarz
Keyword(s):  
Hydrothermal Treatment ◽  
Physical Adsorption ◽  
Sol Gel ◽  
Synthesis Method ◽  
Xrd Analysis ◽  
Titanium Hydroxide ◽  
Gel Method ◽  
Sol Gel Method ◽  
Crystallite Sizes ◽  
Nanocrystalline Composite

The paper describes the process of TiO2-SnO2 nanocompositesmanufacturing utilizing two-step sol-gel method combined with calcination (in the case of titanium hydroxide gel) or hydrothermal treatment (in the case of tin hydroxide). Phase composition of the obtained nanopowders and average crystallite sizes were determined using XRD analysis. Measurements of the specific surface area were performed using sorption method based on determination of physical adsorption isotherm (BET). Morphology of the nanopowders was observed using transmission electron microscope. The presented synthesis method enables to obtain composites nanopowders from TiO2-SnO2 system with known and controlled chemical and phase compositions, and distinctly diversified TiO2 and SnO2 particle sizes.

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