Structural characterisation of titania or silane-grafted TiO2-SiO2 oxide composite and influence of ionic strength or electrolyte type on their electrokinetic properties

Nowacka, Magdalena; Siwińska-Stefańska, Katarzyna; Jesionowski, Teofil

doi:10.1007/s00396-012-2762-3

Cited by 17 publications

(6 citation statements)

References 25 publications

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“…Zeta potential is crucial for stability control of TiO 2 nanoparticles in suspensions and for the adsorption properties of TiO 2 nanoparticle surfaces. Many authors have shown that the zeta potential of particles depends on several factors, such as the chemical composition of particle surfaces, the composition of the surrounding solvent, pH value, and the presence of ions in the suspension [44][45][46][47][48][49][50]. Titania nanoparticles show a wide range of surface adsorption and optical properties which depend on their shapes and sizes and which correlate to photocatalytic activity [51][52][53][54][55].…”

Section: Introductionmentioning

confidence: 99%

Influence of Selected Alkoxysilanes on Dispersive Properties and Surface Chemistry of Titanium Dioxide and TiO₂–SiO₂ Composite Material

Siwińska-Stefańska

Ciesielczyk

Nowacka

et al. 2012

Journal of Nanomaterials

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The paper reports on characterisation of titanium dioxide and coprecipitated TiO2–SiO2composite material functionalised with selected alkoxysilanes. Synthetic composite material was obtained by an emulsion method with cyclohexane as the organic phase, titanium sulfate as titanium precursor, and sodium silicate solution as precipitating agent were applied. Structures of titania and composite material samples were studied by the wide angle X-ray scattering method. The chemical composition of TiO2–SiO2composite material precipitated was evaluated based on the energy dispersive X-ray spectroscopy technique. The functionalised TiO2and TiO2–SiO2composite material were thoroughly characterised to determine the yield of functionalisation with silanes. The characterisation included determination of dispersion and morphology of the systems (particle size distribution, scanning electron microscope images), adsorption properties (nitrogen adsorption isotherms), and electrokinetic properties (zeta potential).

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Section: Introductionmentioning

confidence: 99%

Influence of Selected Alkoxysilanes on Dispersive Properties and Surface Chemistry of Titanium Dioxide and TiO₂–SiO₂ Composite Material

Siwińska-Stefańska

Ciesielczyk

Nowacka

et al. 2012

Journal of Nanomaterials

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“…[36][37][38] In detail, the silane was at first dispersed by ultrasound in methanol/water solution (4/1 v/v) and then hydrolyzed at room temperature for 2 h in the presence of a suitable amount of SiO 2 (30 phr, i.e. parts of hundreds of rubber).…”

Section: Preparation Of Sio 2 @Poss Hybrid Fillermentioning

confidence: 99%

Hybrid SiO₂@POSS nanofiller: a promising reinforcing system for rubber nanocomposites

D’Arienzo

Redaelli

Callone

et al. 2017

Mater. Chem. Front.

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A novel hybrid nanofiller, SiO 2 @POSS, where the silica nanoparticles (NPs) and the POSS belong to the same functional structure, has been synthesized by grafting different loadings of OctaMethacrylPOSS onto silanized commercial SiO 2 , using a surface reaction mediated by dicumylperoxide (DCP). The peroxide, besides anchoring the nanocages onto the silica surface, ensures the presence of methacryl functionalities in the final structure, which are still available for cross-linking reactions with a polymer host. The hybrid SiO 2 @POSS NPs were used to prepare, by ex situ blending, SBR nanocomposites. The dynamic-mechanical analysis performed on the cured SBR/SiO 2 @POSS composites indicated that the presence of POSS induces a remarkable increase of modulus either at low or at high strain, and a considerable decrease of hysteresis. This has been associated with the peculiar hybrid structure of the SiO 2 @POSS filler, in which silica NP aggregates are partially interconnected and surrounded by a thin shell of POSS nanounits which, thanks to their high number of reactive functionalities, promote the formation of ''sticky regions'' among the silica aggregates and, consequently, a tight filler network wherein rubber is immobilized. This grants a relevant reinforcement and increased hysteretic properties, suggesting SiO 2 @POSS as a promising filler system for decreasing the energy loss under strain and for leading to a potential reduction of filler utilization in rubber composite formulations.

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“…In the second step, the obtained titania powder was grafted with AAPTS-sample TA. Modification was performed using 1 wt.% of AAPTS (calculated for 100 g of TiO 2 ) prepared in a MeOH/deionized water mixture (4/1 v/v) and applying the socalled dry technique, described in detail in [24,25]. Titania was treated with AAPTS to obtain a positively charged surface, to enhance the interaction between titania and graphene oxide.…”

Section: Preparation Of Modified Titaniamentioning

confidence: 99%

Titanium dioxide/graphene oxide composite and its application as an anode material in non-flammable electrolyte based on ionic liquid and sulfolane

Kurc

Siwińska-Stefańska

Jakóbczyk

et al. 2016

J Solid State Electrochem

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A composite of aminosilane-grafted TiO 2 (TA) and graphene oxide (GO) was prepared via a hydrothermal process. The TiO 2 /graphene oxide-based (TA/GO) anode was investigated in an ionic liquid electrolyte (0.7 M lithium bis(trifluoromethanesulfonyl)imide (LiNTf 2 )) in ionic liquid (N-methyl-N-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide (MPPyrNTf 2 )) at room temperature and in sulfolane (1 M lithium hexafluorophosphate (LiPF 6 ) in tetramethylene sulfolane (TMS)). Scanning and transmission electron microscopy (SEM and TEM) observations of the anode materials suggested that the electrochemical intercalation/deintercalation process in the ionic liquid electrolyte with vinylene carbonate (VC) leads to small changes on the surface of TA/GO particles. The addition of VC to the electrolyte (0.7 M LiNTf 2 in MPPyrNTf 2 + 10 wt.% VC) considerably increases the anode capacity. Electrodes were tested at different current regimes in the range 5-50 mA g . The decrease in anode capacity with increasing current rate was interpreted as the result of kinetic limits of electrode operation. A much lower capacity was observed for the system TA/GO│1 M LiPF 6 in TMS + 10 wt.% VC│Li.

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Structural characterisation of titania or silane-grafted TiO2-SiO2 oxide composite and influence of ionic strength or electrolyte type on their electrokinetic properties

Cited by 17 publications

References 25 publications

Influence of Selected Alkoxysilanes on Dispersive Properties and Surface Chemistry of Titanium Dioxide and TiO₂–SiO₂ Composite Material

Influence of Selected Alkoxysilanes on Dispersive Properties and Surface Chemistry of Titanium Dioxide and TiO₂–SiO₂ Composite Material

Hybrid SiO₂@POSS nanofiller: a promising reinforcing system for rubber nanocomposites

Titanium dioxide/graphene oxide composite and its application as an anode material in non-flammable electrolyte based on ionic liquid and sulfolane

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Structural characterisation of titania or silane-grafted TiO2-SiO2 oxide composite and influence of ionic strength or electrolyte type on their electrokinetic properties

Cited by 17 publications

References 25 publications

Influence of Selected Alkoxysilanes on Dispersive Properties and Surface Chemistry of Titanium Dioxide and TiO2–SiO2 Composite Material

Influence of Selected Alkoxysilanes on Dispersive Properties and Surface Chemistry of Titanium Dioxide and TiO2–SiO2 Composite Material

Hybrid SiO2@POSS nanofiller: a promising reinforcing system for rubber nanocomposites

Titanium dioxide/graphene oxide composite and its application as an anode material in non-flammable electrolyte based on ionic liquid and sulfolane

Contact Info

Product

Resources

About

Influence of Selected Alkoxysilanes on Dispersive Properties and Surface Chemistry of Titanium Dioxide and TiO₂–SiO₂ Composite Material

Influence of Selected Alkoxysilanes on Dispersive Properties and Surface Chemistry of Titanium Dioxide and TiO₂–SiO₂ Composite Material

Hybrid SiO₂@POSS nanofiller: a promising reinforcing system for rubber nanocomposites