Effect of sodium dodecylsulfate monomers and micelles on …
DOI: 10.1016/j.jcis.2015.02.051 Corpus ID: 12325651; Effect of sodium dodecylsulfate monomers and micelles on the stability of aqueous dispersions of titanium dioxide pigment nanoparticles against agglomeration and sedimentation.
Effect of humic acid source on humic acid adsorption onto titanium …
Humic acid adsorption onto titanium dioxide nanoparticles (nano-TiO2) and the sedimentation of HA-coated and uncoated nano-TiO2 were monitored by Ultraviolet-visible (UV-vis) spectroscopy. Synchronous scan fluorescence (SSF) spectroscopy was used to complement the study of HA adsorption onto nano-TiO2. Phosphate buffer was found to reduce the ...
Stability of Aqueous Dispersions of Titanium Dioxide …
Particles of titanium dioxide (TiO2) are widely used as white pigments in paints and inks, due to their brightness and high refractive index. Yet, with TiO2 having a high density (4.2 g/cm3), particles with typical sizes of 300 nm sediment rapidly even before significant agglomeration can occur. Thus, increasing the stability of TiO2 dispersions against sedimentation as well as …
Stable Aqueous Dispersions of Hydrophobically Modified Titanium Dioxide …
Stable Aqueous Dispersions of Hydrophobically Modified Titanium Dioxide Pigments through Polyanion Adsorption: Synthesis, Characterization, and Application in Coatings Langmuir. 2016 Mar 1 ... Based on particle sedimentation under centrifugal force, the hydrophobically modified pigments possess greater dispersion stability with polyanions than ...
Magnetic sedimentation of nonmagnetic TiO2 …
A new approach to remove TiO 2 nanoparticles from water is studied. Composite Fe 3 O 4-SiO 2 and Fe-C-SO 3 H nanoparticles with magnetic cores (5 nm) were designed to be used as flocculants for magnetic sedimentation of nonmagnetic TiO 2 nanoparticles in water. The sedimentation dynamics of heterogeneous water suspensions (starting solid phase …
A facile strategy to achieve monodispersity and stability of pigment
Titanium dioxide (TiO 2) with a particle size ranging from 1 nm to 500 nm is the mostly studied metal oxide and has potential applications in various fields, such as catalysts, ... The tendency and rate of the dispersion sedimentation were estimated by the value of A …
Study on Dispersion of TiO2 Nanopowder in …
In this study, we investigated the effects of near supercritical carbon dioxide (SCCO2) parameters, including pressure, temperature, and saturation time on titanium dioxide (TiO2) nanopowder dispersion in water …
Sedimentation Process of TiO2 Nanoparticles in Aqueous …
Meanwhile, in the presence of organic matter, rhodamine B, methylene orange, and humic acid did not significantly affect the formation of TiO2 sedimentation.Keywords: titanium dioxide ...
(PDF) Dispersion and stability of titanium …
The increasing applications of titanium dioxide (TiO(2)) nanoparticles raise concerns about their potential environmental impacts. ... Sedimentation and agglomeration of titanium particles were ...
Effects of material properties on sedimentation and …
The results indicate that pH and ionic strength greatly affect the TiO2 sedimentation process. Sedimentation can be formed properly when the solution is at pH 1 and 14, this happens because pH is close to the isoelectric point. Meanwhile, ionic strength with a concentration of 0.1 M gave the most optimal results in TiO2 sedimentation.
Assessment of agglomeration, co-sedimentation …
Nano titanium dioxide (nTiO 2) is the most abundantly released engineered nanomaterial (ENM) in aquatic environments. Therefore, it is prudent to assess its fate and its effects on lower...
Development of Sedimentation Resistant Water-acrylic Titanium Dioxide …
The minimum deposition rate of titanium dioxide dispersions at a dosing of 0.25 g/dm3 of sodium polyacrylate was at the level of 0.097 10-3 g/s at any content of film-forming agent (Cff=0.5÷5 g/dm3) in suspensions. ... (C>1 g/dm3) in suspensions, sedimentation stability decreased, which is proved by an increase in the sedimentation rate of ...
TiO2 nanoparticle dispersions in water and nonaqueous …
Hansen Solubility Parameters (HSP) have been shown to be an effective approach for rationalizing and predicting the stability of titanium dioxide nanoparticles (TiO 2 NPs) dispersions. However, interparticle electrostatic interactions, not considered in Hansen's approach but taken into account in the DLVO theory, are expected to play a significant role in organic …
Assessment of agglomeration, co-sedimentation and …
Nano titanium dioxide (nTiO[2] ) is the most abundantly released engineered nanomaterial (ENM) in aquatic environments. Therefore, it is prudent to assess its fate and its effects on lower trophic-level organisms in the aquatic food chain. A predator-and-prey-based ...
Agglomeration and sedimentation of titanium dioxide …
Taking into account the highest initial concentration of 10 mg/l, the n-TiO2 sedimentation behaviour was basically the same for all the aqueous dispersions (Fig. S4, Online Resource), and the settled n-TiO2 in all dispersions reached very similar values after 50 h, ranging from 94.5 to 98.3 % initial concentration. ...
Comparison on aggregation and sedimentation of titanium dioxide
In this study, aggregation and sedimentation of three homologous nanomaterials, titanium dioxide (TiO2), titanate nanotubes (TNs), and titanate nanotubes-TiO2 (TNs-TiO2) were systematically ...
Effects of material properties on sedimentation and …
This study investigated the sedimentation and aggregation kinetics of titanium dioxide (TiO(2)) nanoparticles with varying material properties (i.e., crystallinity, morphology, and chemical composition). Used in the study were various types of commercially available TiO(2) nanoparticles: three spher …
Effects of material properties on sedimentation and aggregation …
This study investigated the sedimentation and aggregation kinetics of titanium dioxide (TiO(2)) nanoparticles with varying material properties (i.e., crystallinity, morphology, and chemical ...
(PDF) Effect of sodium dodecylsulfate monomers and …
The results indicate that pH and ionic strength greatly affect the TiO2 sedimentation process. Sedimentation can be formed properly when the solution is at pH 1 and 14, this happens because pH is close to the isoelectric point. Meanwhile, ionic strength with a concentration of 0.1 M gave the most optimal results in TiO2 sedimentation.
Comparison on aggregation and sedimentation of titanium …
In this study, aggregation and sedimentation of three homologous nanomaterials, titanium dioxide (TiO2), titanate nanotubes (TNs), and titanate nanotubes-TiO2 (TNs-TiO2) …
Adsorption, aggregation and sedimentation of titanium dioxide
In this study, aggregation and sedimentation of three homologous nanomaterials, titanium dioxide (TiO2), titanate nanotubes (TNs), and titanate nanotubes-TiO2 (TNs-TiO2) were systematically ...
Full article: Dispersion and sedimentation of …
Little information is available on Titanium dioxide nanoparticles (nTiO 2) behavior in different culture media for aquatic organisms. This study aimed to accurately evaluate nTiO 2 dispersion and sedimentation in common …
Particle size characterization of titanium dioxide in …
Sedimentation field-flow fractionation–inductively coupled plasma–mass spectrometry (SdFFF-ICP-MS) was successfully applied to investigate particle size distribution of titanium dioxide (TiO2) in sunscreen samples after hexane extraction to remove organic components from the samples. Three brands of sunscreen products of various sun protection …
Effects of material properties on sedimentation and …
This study investigated the sedimentation and aggregation kinetics of titanium dioxide (TiO(2)) nanoparticles with varying material properties (i.e., crystallinity, morphology, …
Filter feeders increase sedimentation of titanium dioxide: …
Titanium dioxide particles (TiO 2) are widely used to produce whitens (titanium white) and different class of nanomaterials (semiconductors, photo catalysts and nanotubes).Nanomaterials are excellent adsorbents and catalysts with a wide range of applications. However, these are reported to induce biological and genetic alterations among …
High stability, high solid content, low viscosity titanium dioxide
Achieving stable dispersion of titanium dioxide (TiO2) particles is crucial for their practical applications in various fields. However, stabilizing pigment TiO2 (200–300 nm) in aqueous systems with low viscosity (~ 10 cP) presents a significant challenge. In this work, we proposed a simple strategy using dispersant Disuper S9100 as dispersant and polyethylene …
Removal of titanium dioxide nanoparticles by coagulation: effects …
To investigate the possibility of removing titanium dioxide nanoparticles (TiO2 NPs) from water by coagulation, as well as to find the optimal coagulant and experimental conditions for TiO2 NP removal, four types of coagulant were adopted: polyferric sulfate (PFS), ferric chloride (FeCl3), polyaluminum chloride (PACl), and alum (Al2(SO4)3). It ...
Sedimentation and Reuse of Titanium Dioxide: Application to …
Titanium dioxide (TiO 2) sedimentation, enhanced through charge neutralization and coagulation/flocculation with metal salts and polymers, was investigated to evaluate the …
TiO2: water treatment | Resource | RSC Education
Part of a series of resources investigating how using titanium dioxide as a photocatalyst can help to create cleaner water using sunlight. Downloads. TiO Handout | PDF, Size 0.24 ; ... 2.12 Describe how: waste and ground water can be made potable, including the need for sedimentation, filtration and chlorination; sea water can be made potable ...
Sedimentation of Titanium Dioxide Suspension under the …
Once charged magnetite nanoparticles, which participate in the sedimentation of a titanium dioxide suspension, cross the force lines of the magnetic field, they begin to move directedly. In the magnetic field, the Lorentz force acts on a charged particle. Consequently, two competing forces arise, namely, the force of gravity and the Lorenz ...