A case study of aggregation behaviors of titanium dioxide nanoparticles in the presence of dodecylbenzene sulfonate in natural water

Du, Xin; Wang, Xiuheng; You, Shijie; Wang, Qiuru; Gong, Xiaobo

doi:10.1016/j.jes.2015.05.011

Cited by 6 publications

(5 citation statements)

References 41 publications

(72 reference statements)

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“…To investigate the pH dependent nature of the ZnS:Mn-MAA nanocrystals in water, the corresponding surface charges of the nanocrystals were determined by the electrophoretic light scattering method [ 19 ]. Moreover, the degrees of aggregation of the nanocrystals in water were measured by the hydrodynamic light scattering method [ 20 ]. Finally, the relative potocatalytic activities of the ZnS:Mn-MAA nanocrystals were evaluated by measuring the degradation rate of an organic dye (methylene blue, MB) molecule under the UV light irradiation [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Surface Properties and Photocatalytic Activities of the Colloidal ZnS:Mn Nanocrystals Prepared at Various pH Conditions

Heo

Hwang

2015

Nanomaterials

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Water-dispersible ZnS:Mn nanocrystals (NC) were synthesized by capping the surface with mercaptoacetic acid (MAA) molecules at three different pH conditions. The obtained ZnS:Mn-MAA NC products were physically and optically characterized by corresponding spectroscopic methods. The UV-Visible absorption spectra and PL emission spectra showed broad peaks at 310 and 590 nm, respectively. The average particle sizes measured from the HR-TEM images were 5 nm, which were also supported by the Debye-Scherrer calculations using the X-ray diffraction (XRD) data. Moreover, the surface charges and the degrees of aggregation of the ZnS:Mn-MAA NCs were determined by electrophoretic and hydrodynamic light scattering methods, indicating formation of agglomerates in water with various sizes (50–440 nm) and different surface charge values accordingly the preparation conditions of the NCs (−7.59 to −24.98 mV). Finally, the relative photocatalytic activities of the ZnS:Mn-MAA NCs were evaluated by measuring the degradation rate of methylene blue (MB) molecule in a pseudo first-order reaction condition under the UV-visible light irradiation. As a result, the ZnS:Mn-MAA NC prepared at the pH 7 showed the best photo-degradation efficiency of the MB molecule with the first-order rate constant (kobs) of 2.0 × 10−3·min−1.

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Section: Introductionmentioning

confidence: 99%

Surface Properties and Photocatalytic Activities of the Colloidal ZnS:Mn Nanocrystals Prepared at Various pH Conditions

Heo

Hwang

2015

Nanomaterials

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“…Ступінь редиспергування порошків у рідких середовищах залежить від багатьох чинників, які впливають на характер та інтенсивність міжчастинкової взаємодії [2][3][4]. Серед технологічних порошків, які використовують у виготовленні різноманітних матеріалів, вагоме місце посідає діоксид титану рутильної модифікації [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Актуальними сьогодні залишаються дослідження процесів агрегування частинок пігментного діоксиду титану в його водних суспензіях за наявності електролітів, поверхнево-активних речовин та поліелектролітів [12][13][14][15].…”

Section: вступunclassified

“…Актуальними сьогодні залишаються дослідження процесів агрегування частинок пігментного діоксиду титану в його водних суспензіях за наявності електролітів, поверхнево-активних речовин та поліелектролітів [12][13][14][15]. Також досліджено агрегування наночастинок діоксиду титану у природних водах [16][17][18][19] у присутності мікроорганізмів [20][21] та в інших біологічних середовищах [22].…”

Section: вступunclassified

The influence of methods of suspension preparation on the redispersion degree of titanium dioxide powder

Yaremko¹,

Petryshyn²,

Fedushynska³

2020

Visnyk Lviv Univ. Ser. Chem.

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“…In the presence of ethonium the size of the aggregates in the system increases significantlya maximum of PSDV and PSDN is observed at D=786 nm. The increase of particle size in presence of ethonium may be caused by flocculation of silica particles due to bridging mechanism and forming mixed surfactant/silica micelles [29,30].…”

Section: Particle Size Distribution (Psd)mentioning

confidence: 99%

Effect of Ethonium Adsorption on Structure Formation in Nanosilica Dispersions

Goncharuk¹,

Gun’ko²,

Ugnivenko³

et al. 2017

Nano Res Appl

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Adsorption of ethonium on silica surface strongly affects the particle size distribution, stability and rheological properties of aqueous dispersions of fumed silica. The Sshape of isotherm of ethonium adsorption on nanosilica suggests the multilayer adsorption. The adsorption of ethonium leads to changes in the shape of the pHdependence of the zeta-potential and a significant increase in the particle sizes in the aqueous dispersions of silica. A marked increase in the colloidal stability is observed for the dispersions at silica concentration of 5 wt.%, while for 1 wt.% dispersions the ethonium presence almost does not affect the stability. The rheological properties of the dispersions depend on the ethonium concentration, and the maximum values of the viscosity and rheopectic behavior are observed at ethonium concentration of 0.1-0.3 wt.%

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A case study of aggregation behaviors of titanium dioxide nanoparticles in the presence of dodecylbenzene sulfonate in natural water

Cited by 6 publications

References 41 publications

Surface Properties and Photocatalytic Activities of the Colloidal ZnS:Mn Nanocrystals Prepared at Various pH Conditions

Surface Properties and Photocatalytic Activities of the Colloidal ZnS:Mn Nanocrystals Prepared at Various pH Conditions

The influence of methods of suspension preparation on the redispersion degree of titanium dioxide powder

Effect of Ethonium Adsorption on Structure Formation in Nanosilica Dispersions

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