Effect of the Oxidation Potential of the Metal Deposit on the Photocatalytic Activity of Metallized Titanium Dioxide Samples

2009 ◽  
Vol 223 (6) ◽  
pp. 719-732 ◽  
Author(s):  
Cornelia Damm ◽  
G. Israel
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Oxidation Potential ◽  
Metal Deposit

scholarly journals Photocatalytic Activity Enhancement of Low-pressure Cold-Sprayed TiO2 Coatings Induced by Long-term Water Vapor Exposure

2021 ◽  
Author(s):  
Seremak Wioletta ◽  
Baszczuk Agnieszka ◽  
Jasiorski Marek ◽  
Gibas Anna ◽  
Winnicki Marcin
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Water Vapor ◽  
Sol Gel ◽  
Low Pressure ◽  
Oxygen Depletion ◽  
Amorphous Structure ◽  
Industrial Applications ◽  
Additional Parameter

AbstractThis work shows that the titanium dioxide coatings obtained by low-pressure cold gas spraying with the use of the sol–gel amorphous TiO2 powder are characterized by photocatalytic activity despite their partial amorphous content. Moreover, the research outcome suggests that the decomposition rate of organic pollutants is enhanced after long-term exposure to moisture. The condensation humidity test is not detrimental to the continuity and integrity of the coating, but the phase composition of coatings changes—with the exposure to water vapor, the portion of the amorphous phase crystallizes into brookite. The mechanism responsible for the conversion of amorphous TiO2 into brookite is attributed to the water-driven dissolution and reprecipitation of TiO6 octahedra. It has been shown that an additional parameter necessary for the stabilization of the brookite is the oxygen depletion of the amorphous structure of titanium dioxide. Considering the results presented in this paper and the advantages of a portable, low-pressure cold spray system for industrial applications, it is expected that TiO2 coatings produced from a sol–gel feedstock powder can be further developed and tested as efficient photocatalysts.

scholarly journals Unexpected Link between the Template Purification Solvent and the Structure of Titanium Dioxide Hollow Spheres

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 112
Author(s):  
Tamás Gyulavári ◽  
Kata Kovács ◽  
Klára Magyari ◽  
Kornélia Baán ◽  
Anna Szabó ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Phase Composition ◽  
Anatase Phase ◽  
Hollow Spheres ◽  
Rutile Phase ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Carbonate Species ◽  
Determining Factor

Carbon spheres were applied as templates to synthesize titanium dioxide hollow spheres. The templates were purified with either ethanol or acetone, and the effects of this treatment on the properties of the resulting titania were investigated. The photocatalytic activity of the catalysts was measured via the decomposition of phenol model pollutant under visible light irradiation. It was found that the solvent used for the purification of the carbon spheres had a surprisingly large impact on the crystal phase composition, morphology, and photocatalytic activity. Using ethanol resulted in a predominantly rutile phase titanium dioxide with regular morphology and higher photocatalytic activity (r0,phenol = 3.9 × 10−9 M∙s−1) than that containing mainly anatase phase prepared using acetone (r0,phenol = 1.2 × 10−9 M∙s−1), surpassing the photocatalytic activity of all investigated references. Based on infrared spectroscopy measurements, it was found that the carbon sphere templates had different surface properties that could result in the appearance of carbonate species in the titania lattice. The presence or absence of these species was found to be the determining factor in the development of the titania’s properties.

Photocatalytic Activity of W-Doped TiO2 Nanopowders

2008 ◽  
Vol 11 (1) ◽  
Author(s):  
Katarzyna A. Michalow ◽  
Andri Vital ◽  
Andre Heel ◽  
Thomas Graule ◽  
Felix A. Reifler ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Specific Surface ◽  
Dopant Concentration ◽  
Flame Spray ◽  
Titanium Tetra Isopropoxide ◽  
Flame Spray Synthesis ◽  
One Step ◽  
Tio2 Nanopowders ◽  
Doped Titanium Dioxide

AbstractPolycrystalline tungsten-doped titanium dioxide nanopowders within a dopant concentration of 0-1 at.% were prepared by a one-step flame spray synthesis (FSS). Mixtures of titanium tetra-isopropoxide dissolved in ethanol and tungsten hexacarbonyl solubilized in tetrahydrofuran were used as precursors. The specific surface area (SSA) of the powders was between 40 and 130 m

Bio-templated synthesis of hierarchically ordered macro-mesoporous anatase titanium dioxide flakes with high photocatalytic activity

RSC Advances ◽  
2015 ◽  
Vol 5 (20) ◽  
pp. 15572-15578 ◽  
Author(s):  
Bing Li ◽  
Jianquan Zhao ◽  
Jing Liu ◽  
Xinyu Shen ◽  
Shaobo Mo ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
High Photocatalytic Activity ◽  
Templated Synthesis ◽  
Rose Petals

Hierarchically ordered macro-mesoporous anatase TiO2 flakes were synthesized by using rose petals and P123 as dual templates with high photocatalytic activity.

One-pot synthesis of a TiO2–CdS nano-heterostructure assembly with enhanced photocatalytic activity

RSC Advances ◽  
2015 ◽  
Vol 5 (44) ◽  
pp. 34942-34948 ◽  
Author(s):  
Sayantan Mazumdar ◽  
Aninda J. Bhattacharyya
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Cadmium Sulfide ◽  
Self Assembly ◽  
Cost Effective ◽  
One Pot ◽  
One Pot Synthesis ◽  
Cost Effective Method

An unprecedented morphology of a titanium dioxide (TiO2) and cadmium sulfide (CdS) self-assembly obtained using a ‘truly’ one-pot and highly cost effective method with a multi-gram scale yield is reported here.

scholarly journals Enhancing photocatalytic activity of titanium dioxide through incorporation of MIL-53(Fe) toward degradation of organic dye

2018 ◽  
Vol 66 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Nurul Wafa Othman ◽  
Hasmira Radde ◽  
Perng Yang Puah ◽  
Yee Soon Ling ◽  
Pak Yan Moh
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Organic Dye

Remarkably enhanced photocatalytic activity by nickel nanoparticle deposition on sulfur-doped titanium dioxide thin film

2009 ◽  
Vol 87 (3-4) ◽  
pp. 239-244 ◽  
Author(s):  
Masaki Yoshinaga ◽  
Katsutoshi Yamamoto ◽  
Nobuaki Sato ◽  
Koyu Aoki ◽  
Takeshi Morikawa ◽  
...  
Keyword(s):  
Thin Film ◽  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Nanoparticle Deposition ◽  
Nickel Nanoparticle ◽  
Doped Titanium Dioxide
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