Photophysical and photocatalytic properties of nanosized copper-doped titania sol–gel catalysts

2009 ◽  
Vol 148 (1-2) ◽  
pp. 103-108 ◽  
Author(s):  
Rosendo López ◽  
Ricardo Gómez ◽  
María Elena Llanos
Keyword(s):  
Sol Gel ◽  
Photocatalytic Properties ◽  
Titania Sol ◽  
Doped Titania

scholarly journals Optical properties of in situ doped and undoped titania nanocatalysts and doped titania sol–gel nanofilms

2006 ◽  
Vol 252 (15) ◽  
pp. 5365-5367 ◽  
Author(s):  
A. Ferreira da Silva ◽  
I. Pepe ◽  
James L. Gole ◽  
S.A. Tomás ◽  
R. Palomino ◽  
...  
Keyword(s):  
Optical Properties ◽  
Sol Gel ◽  
Titania Sol ◽  
Doped Titania

Characterization of iron-doped titania sol–gel materials

2002 ◽  
Vol 12 (3) ◽  
pp. 714-718 ◽  
Author(s):  
T. López ◽  
J. A. Moreno ◽  
R. Gómez ◽  
X. Bokhimi ◽  
J. A. Wang ◽  
...  
Keyword(s):  
Sol Gel ◽  
Iron Doped ◽  
Titania Sol ◽  
Doped Titania

scholarly journals Influence of synthesis methods on zirconium doped titania photocatalysts

2010 ◽  
Vol 8 (1) ◽  
pp. 182-187 ◽  
Author(s):  
Narayanan Binitha ◽  
Zahira Yaakob ◽  
Ramakrishnan Resmi
Keyword(s):  
Sol Gel ◽  
Chemical Characterization ◽  
Synthesis Methods ◽  
Electron Microscopic ◽  
Preparation Methods ◽  
Transmission Electron ◽  
Anatase Titania ◽  
Volume Measurements ◽  
Titania Sol ◽  
Doped Titania

AbstractSynthesis of various zirconium doped titania based photocatalysts were carried out by adapting different synthetic strategies. Doping is done on commercially available anatase titania, sol-gel titania and template mediated sol gel titania. A comparative study of the various prepared photocataysts was done using physico-chemical characterization techniques such as X-ray diffraction (XRD), surface area- pore volume measurements, UV-VIS Diffuse reflectance spectra (DRS), elemental analysis (XRF) and transmission electron microscopic (TEM) studies. The effect of zirconium and preparation methods on the photocatalytic degradation of methylorange is studied extensively. Both the surface properties and photo activity of zirconium doped titania were found to have a great dependence on the preparation methods. Among the different photocatalytic systems, the catalyst prepared by doping in the presence of urea template was found to produce a maximum photodegradation of 97.5%.

Study of the Synthesis and Photocatalytic Properties of Iron-Doped Titania Nanocrystallines at Room Temperature

2012 ◽  
Vol 562-564 ◽  
pp. 255-259
Author(s):  
Zhi Hao Wei ◽  
Min Zhong ◽  
Yin Deng
Keyword(s):  
Room Temperature ◽  
Sol Gel ◽  
Photocatalytic Properties ◽  
Iron Doping ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Iron Doped ◽  
Doped Titania ◽  
Average Size

Iron-doped titania (TiO2) nanocrystalline were prepared by sol-gel method at room temperature. The samples were characterized by using transmission electron microscope, X-ray diffractometer and ultaviolet-visible spectrophotometer. X-ray diffraction shows that iron-doped titania have the titania anatase and brookite structure, and the more iron doped in, the less titania brookite structure. When the doping content of 10at% iron, the titania brookite structure disappear absolutely. Transmission electron microscopy shows that with the increase of iron-doping from 0.00 to 0.25, the average size of the grains decrease from 5.7nm to 4.3nm. And samples have higher crystallinity. Using UV-visible spectrophotometer to measure its photocatalytic properties the results show that it has the highest rate of 60% photocatalytic degradation when it is absorbed in methylorange in two hours. With the increase of iron-doping from 0.00 to 0.25, the more iron doped in, the higher photocatalytic properties.

scholarly journals Meldola’s Blue — doped titania sol-gel sensor for NADH determination

2011 ◽  
Vol 9 (1) ◽  
pp. 185-191 ◽  
Author(s):  
Juliusz Adamski ◽  
Jolanta Kochana
Keyword(s):  
Sol Gel ◽  
High Sensitivity ◽  
Enzymatic Oxidation ◽  
Experimental Conditions ◽  
Gel Technique ◽  
Titania Sol ◽  
Doped Titania ◽  
Meldola's Blue ◽  
Meldola’S Blue

AbstractTitania layers obtained by a sol-gel technique doped with redox mediator, Meldola’s Blue, were employed for construction of a new NADH senor. Optimization of preparation process as well as experimental conditions affecting the response of the sensor were examined. Under optimal conditions NADH could be determined in the wide linear range from 90 to 2300 µM with detection limit 12 µM and a high sensitivity 12.5 nA µM−1. The usefulness of developed sensor was preliminarily checked in determination of NADH forming during enzymatic oxidation of ethanol catalyzed by alcohol dehydrogenase (ADH).

PERFORMANCE OF TUNGSTEN OXIDE DOPED TITANIA via SOL-GEL PROCESS FOR PHOTO-DEGRADATION OF TRANS-CINNAMIC ACID

2016 ◽  
Vol 24 (1) ◽  
pp. 75-86
Author(s):  
Y.N. Tan ◽  
◽  
A.H.A. Malek ◽  
M.Z.A. Malek ◽  
M.T. Zainuddin ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Cinnamic Acid ◽  
Sol Gel ◽  
Photo Degradation ◽  
Sol Gel Process ◽  
Doped Titania

scholarly journals Synthesis and photocatalytic properties of Sn–TiO2 nanomaterials

2020 ◽  
Vol 10 (01n02) ◽  
pp. 2060018
Author(s):  
E. M. Bayan ◽  
T. G. Lupeiko ◽  
L. E. Pustovaya ◽  
M. G. Volkova
Keyword(s):  
Phase Transition ◽  
Thermal Stability ◽  
Sol Gel ◽  
Rutile Phase ◽  
Photocatalytic Properties ◽  
Light Activation ◽  
X Ray ◽  
Tio2 Nanomaterials ◽  
Visible Light Activation ◽  
Thermal Stability Of

Sn-doped TiO2 nanomaterials were synthesized by sol–gel method. It was shown the phase compositions and phase transitions change with the introduction of different tin amounts (0.5–20[Formula: see text]mol.%). X-ray powder diffraction was used to study the effect of different tin amounts on the anatase–rutile phase transition. It was found that the introduction of ions increases the thermal stability of anatase modifications. The material’s photocatalytic activity was studied in reaction with a model pollutant (methylene blue) photodegradation under UV and visible light activation. The best photocatalytic properties were shown for material, which contains 5[Formula: see text]mol.% of Sn.

scholarly journals Development of Adhesive, Bioactive and Antibacterial Titania Sol-Gel Coating on Titanium Substrate by Dip-Coating Technique

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 243
Author(s):  
Diana Horkavcová ◽  
Quentin Doubet ◽  
Gisèle Laure Lecomte-Nana ◽  
Eva Jablonská ◽  
Aleš Helebrant
Keyword(s):  
Simulated Body Fluid ◽  
Body Fluid ◽  
Sol Gel ◽  
Titanium Substrate ◽  
Dip Coating ◽  
Coating Technique ◽  
Metal Implants ◽  
Excellent Adhesion ◽  
Titania Sol ◽  
Dip Coating Technique

The sol-gel method provides a wide variety of applications in the medical field. One of these applications is the formation of coatings on the metal implants. The coatings containing specific additive can enhance or improve the existing surface properties of the substrate. In this work, titania sol-gel coatings were doped with two forms of silver (AgNO3, Ag3PO4) and synthetic hydroxyapatite and applied on the titanium samples by dip-coating technique. After drying and slow firing, all coatings were characterized with scanning electron microscopy. Thin coatings were successfully prepared with excellent adhesion to the substrate (measured by ASTM D 3359-2), despite cracks. Coatings containing silver and hydroxyapatite demonstrated a 100% antibacterial effect against Escherichia coli after 24 h. The bioactivity of the coatings containing hydroxyapatite tested in modified simulated body fluid under static-dynamic conditions was confirmed by bone-like hydroxyapatite precipitation. To better understand the interaction of the coatings with simulated body fluid (SBF), changes of Ca2+ and (PO4)3− ions concentrations and pH values were studied.

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