Clay-catalyzed phenomena of cationic-dye aggregation and hydroxo-chromium oligomerization

Roulia, Maria; Vassiliadis, Alexandros A.

doi:10.1016/j.micromeso.2009.01.004

Cited by 10 publications

(4 citation statements)

References 41 publications

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“…Basic Blue 41, thiacyanine and brilliant green, in aqueous suspensions. [5][6][7][8][9][10] Because of the penetration of dye molecules on the surface of any particle in a suspension, spectral shifts called H-or J-aggregation (molecular self-assembly) in their absorption spectra can be observed. 11 Generally, the aggregation behaviour of dye molecules takes place in the highly concentrated dye aqueous solution.…”

Section: Introduction *mentioning

confidence: 99%

Investigation of a hybrid material and photophysical properties of rhodamine B in aqueous suspensions of cellulosic particles

Kaya¹

2019

Rev.Roum.Chim.

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In this work, it was focused on the photophysical properties of Rhodamine B (Rh-B) dye compound in the rice husk (sawdust) suspensions (RHS), as well as the characterization of the hybrid material from Rh-B and rice husk (RH). It was revealed that the type of molecular assembly of Rh-B in RHS was H-aggregation. As regards the results of Fourier transformed infrared (FT-IR) spectroscopic characterization, it can be explained that Rh-B dye molecule adsorbed (or penetrated) on the surface of RH particles via H-bonding alongside electrostatic interactions. It was also demonstrated that the particle size of hybrid materials in a colloidal dispersion was about 250 nm, which is a feasible value for ink applications.

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Section: Introduction *mentioning

confidence: 99%

Investigation of a hybrid material and photophysical properties of rhodamine B in aqueous suspensions of cellulosic particles

Kaya¹

2019

Rev.Roum.Chim.

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“…Physico-chemical methods such as, coagulation/ flocculation, clay, perlite and activated carbon adsorption, as well as reverse osmosis techniques, have been developed in order to remove the color. However, the latter methods can only transfer the contaminants (dyes and dye by-products) from one phase to the other, leaving the problem essentially unsolved [8][9][10][11][12][13]. Therefore, attention had to be focused on techniques that lead to the destruction of the dye molecules.…”

Section: Introductionmentioning

confidence: 99%

Destruction of Azo-Reactive Dyes by Ozonation and the Synergetic Effect of a Radio-Frequency Alternating Electric Field Inductance Device

Georgiou¹

2017

CTFTTE

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Discharge of textile wastewater into water-bodies causes serious environmental and health problems. Wastewater color remains due to the non-biodegradable nature of the dyes. However, treatment with ozone can lead to the destruction of the dye molecule, decolorizing thus the textile effluent. In this paper, treatment with ozone in a bubble column reactor resulted in rapid destruction of azo-reactive dyes, utilized primarily for dyeing cellulose fibers. Moreover, ozonation kinetics can be described as a mass-transfer-control process. Combining ozonation with a novel radio-frequency alternating electric field inductance device led to faster destruction of the azo-reactive dyes due to synergetic effects.

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“…Perlite-based fungus-inoculated biofilters and ceramic supports for microfiltration membranes have been tested. Catalytically obtained adsorbed species have been developed onto aluminosilicates; − similarly, a catalytically active zeolite has been prepared from perlite, perlite-immobilized titanium dioxide nanoparticles have been photocatalytically employed and phosphate-accumulating bacteria on perlite carrier have been successful in phosphorus removal . Shape-stabilized phase change energy-storage composites of expanded perlite have been prepared. , Perlite has been employed to regulate the delivery of cutaneous actives through the skin and as a useful tissue engineering compound usable in bone substitution .…”

Section: Introductionmentioning

confidence: 99%

Distinctive Spectral and Microscopic Features for Characterizing the Three-Dimensional Local Aluminosilicate Structure of Perlites

Roulia¹,

Mavromoustakos²,

Vassiliadis

et al. 2014

J. Phys. Chem. C

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Expanded perlite and raw perlites of various origins were examined using solid-state NMR and Fourier transform infrared (FTIR) spectroscopies, as well as scanning electron microscopy, in an attempt to correlate the characteristics of aluminosilicate framework with the material's expansion properties. The 27 Al magic angle spinning (MAS) NMR spectra indicated that aluminum atoms in perlite are mainly tetrahedrally coordinated in Q 4 structures not participating in the expansion process; two different octahedral Al species were also identified in perlite. Owing to the tetrahedra−octahedra transformations, perlite may be classified among the metastable materials. The 29 Si MAS NMR and 1 H− 29 Si CPMAS NMR spectra showed that Q 3 and Q 4 units are mostly abundant, a fact that explains the low cation exchange capacity of perlites. Deconvoluted FTIR and 29 Si MAS NMR spectra are consistent regarding the relative Q n intensities which, together with the network geometry, determine the expansibility of raw perlites. The calculated variations of the Si−O−Si angle are more significant than those of the Si−O bond length, remarkably affecting the structure of the aluminosilicate network. Thus, perlite samples of increasingly fragmentary framework exhibit the highest expansion ratios. SEM micrographs monitored the expansion process differentiating between the low-and highexpansibility perlites.

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Clay-catalyzed phenomena of cationic-dye aggregation and hydroxo-chromium oligomerization

Cited by 10 publications

References 41 publications

Investigation of a hybrid material and photophysical properties of rhodamine B in aqueous suspensions of cellulosic particles

Investigation of a hybrid material and photophysical properties of rhodamine B in aqueous suspensions of cellulosic particles

Destruction of Azo-Reactive Dyes by Ozonation and the Synergetic Effect of a Radio-Frequency Alternating Electric Field Inductance Device

Distinctive Spectral and Microscopic Features for Characterizing the Three-Dimensional Local Aluminosilicate Structure of Perlites

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