TiO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; Films Synthesis over Polypropylene by Sol-Gel Assisted with Hydrothermal Treatment for the Photocatalytic Propane Degradation

Guzmán-Velderrain, Vanessa; López, Yudith Ortega; Gutiérrez, Jesús Salinas; López-Ortíz, Alejandro; Collins-Martı́nez, V.

doi:10.4236/gsc.2014.43017

Cited by 7 publications

(7 citation statements)

References 28 publications

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“…3 a)), in a first stage in the range of 25°C to 125°C, there was a loss of mass of approximately 4.6% due to the evaporation of water and organic solvent remaining from the synthesis [18]. In a second stage, including the range of 125°C to 230°C, a loss of mass of 2.7% was observed, which is associated with the elimination of chemisorbed hydroxyl groups [21]. Finally, in the segment from 230°C to 420°C, a loss of mass of around 4.7% was observed, which is associated with oxidation residues from carbon and chemisorbed water in the solids [22].…”

Section: Figure 1 Xrd Patterns For Tio2 and Tio2-f Samplesmentioning

confidence: 96%

“…The TiO2 solid shows an exothermic signal at 273°C; in the modified solids, it is observed at 255°C, corresponding to the dehydration and decomposition of the organic substances contained in the xerogel. Finally, around 400°C, an exothermic signal related to the combustion of residual organic compounds is evidenced [21].…”

Section: Figure 1 Xrd Patterns For Tio2 and Tio2-f Samplesmentioning

confidence: 97%

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Esterification of levulinic acid via catalytic and photocatalytic processes using fluorinated titanium dioxide materials

Martínez

Mesa

2021

Rev.Fac.Ing.Univ.Antioquia

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This study evaluated the synthesis, characterization, and activity of fluorinated titanium dioxide materials (TiO2-F 1% and TiO2-F 5%) in-situ modified by the sol-gel method in the esterification reaction of levulinic acid conducted by catalytic and photocatalytic processes. The physicochemical properties of the materials were determined by X-ray diffraction, UV–Vis diffuse reflectance spectroscopy, thermal analysis, and pyridine adsorption. It was found that the inclusion of fluoride anion causes a decrease in the levulinic acid conversion by photocatalytic reaction; however, in the catalytic activation, a slight increase in the conversion using the fluoride materials was observed. Finally, the reaction in the presence of halogenated solvents (CCl4) by photolysis reaction favors a conversion of 100% in 1h.

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Section: Figure 1 Xrd Patterns For Tio2 and Tio2-f Samplesmentioning

confidence: 96%

Section: Figure 1 Xrd Patterns For Tio2 and Tio2-f Samplesmentioning

confidence: 97%

Esterification of levulinic acid via catalytic and photocatalytic processes using fluorinated titanium dioxide materials

Martínez

Mesa

2021

Rev.Fac.Ing.Univ.Antioquia

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“…Briefly described, 5 mL TTIP solution were slowly dissolved in 15 mL of isopropanol and 250 mL of milli-Q water. The solution was refluxed at 60 • C for 6 h. Subsequently, 0.5 M HNO 3 was added dropwise, and a white precipitate was observed [36][37][38][39][40]. The precipitate obtained was isolated by filtration and washing with a mixture of hot water and organic solvents in order to remove adsorbed impurities.…”

Section: Synthesis Of Titanium Dioxide Nanoparticles (Tio 2 -Nps)mentioning

confidence: 99%

Synthesis, Characterization and Evaluation of the Antibiofouling Potential of Some Metal and Metal Oxide Nanoparticles

et al. 2020

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This study explores the potential antibiofouling capacity of coatings based on mixes of poly vinyl alcohol (PVA)-glutaraldehyde (GA) incorporating additions of metal and metal oxide nanoparticles (TiO2, ZnO, CuO, AgNPs and Ag-TiO2NPs). Such a kind of hybrid polymer-nanoparticle mix (PVA/GA/ nanoparticles (NPs)) was uniformly applied by spin coating on the surface of a laboratory raceway and tested in freshwater loaded with green algae communities. The results showed PVA/GA was a convenient carrier for the nanoparticles tested. Image analysis of the coatings showed that Ag-TiO2 nanoparticles exhibited a significant improvement of the antibiofouling effect when compared with that of AgNPs and TiO2-NPs. The effect of the Ag-TiO2 NPs loaded coating about four times better than that of ZnO-NPs. A consistent experimental methodology was developed to test the antibiofouling capacity of the coatings and the hybrid coatings developed have demonstrated promising results as environmentally friendly antibiofouling materials.

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“…A drying process removes the solvent entrapped in the gel network, leading to a significant amount of shrinkage and densification. Generally, the gel drying process leads to the formation of an amorphous film, which has to be subjected to thermal treatment to form a crystalline phase [32,38].…”

Section: Introductionmentioning

confidence: 99%

Low-temperature titania coatings for aluminium corrosion protection

Mori

Lamastra

Kačiulis

et al. 2017

Corrosion Engineering, Science and Technology

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TiO 2 coatings on AA6082 aluminium alloy were obtained at low temperature (80 and 100°C) by the sol-gel dip-coating technique starting from titanium tetra-isopropoxide solution in ethyl alcohol. The preparation was carried out in the presence of acetic acid with both functions of catalyst and chelating agent. The curing temperatures used for these coatings are between 80 and 100°C, low enough to make such coatings suitable to incorporate additives such as organic inhibitors or polymeric nanoparticles. The coated samples were characterised by scanning electron microscopy and energy-dispersive spectroscopy, atomic force microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy (EIS). Compact coatings with a thickness of 500 nm, consisting of amorphous and nearly stoichiometric titanium dioxide, were obtained. EIS results revealed an effective corrosion protection of the substrate for more than 120 h of immersion in 3.5 wt-% NaCl aqueous solution.

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TiO<sub>2</sub> Films Synthesis over Polypropylene by Sol-Gel Assisted with Hydrothermal Treatment for the Photocatalytic Propane Degradation

Cited by 7 publications

References 28 publications

Esterification of levulinic acid via catalytic and photocatalytic processes using fluorinated titanium dioxide materials

Esterification of levulinic acid via catalytic and photocatalytic processes using fluorinated titanium dioxide materials

Synthesis, Characterization and Evaluation of the Antibiofouling Potential of Some Metal and Metal Oxide Nanoparticles

Low-temperature titania coatings for aluminium corrosion protection

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