Pyronin Y (basic xanthene dye)-bentonite composite: A spectroscopic study

Tabak, Ahmet Fatih; Kaya, Mehmet; Yılmaz, Nurdane; Meral, Kadem; Onganer, Yavuz; Çağlar, Bülent; SUNGUR, Oğuzhan

doi:10.1016/j.molstruc.2013.11.051

Cited by 8 publications

(9 citation statements)

References 63 publications

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“…4b and Table 1) [28]. This difference in the total mass loss and the water types of lower decomposition energy of composite comparing to that of rawbentonite in the same temperature range support the change of water molecule numbers in the environment of the cationic dye species penetrated into the interlayer space of clay.…”

Section: Thermal Analysissupporting

confidence: 53%

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Preparation and characterization of “green” hybrid clay-dye nanopigments

Kaya

Onganer

Tabak

2015

Journal of Physics and Chemistry of Solids

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Section: Thermal Analysissupporting

confidence: 53%

“…An organo-clay/dye nanopigment is obtained by the treatment of a clay with an organic colorant [11]. As a result of the penetration of cationic dye species into the interlayer, nanopigments can be formed [12].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of “green” hybrid clay-dye nanopigments

Kaya

Onganer

Tabak

2015

Journal of Physics and Chemistry of Solids

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“…However, xanthene-like dyes usually have a large molecular aggregation tendency in concentrated solutions or in the adsorbed-state. 15,[23][24][25][26][27][28][29][30][31][32] In this regard, depending on the dye aggregation, the photophysical properties of the material can be drastically changed. Considering the formation of dimers as the first state in the molecular aggregation process, there are two main types: case (A) perfect H-dimers (monomers disposed in parallel planes in a sandwich-like conformation) are characterized by new absorption bands at a lower wavelength with respect to the monomer band and case (B) perfect J-dimers (monomers in line in a head-to-tail disposition) show absorption bands at a higher wavelength with respect to the monomer band (Scheme 2).…”

Section: Introductionmentioning

confidence: 99%

Strategies for modulating the luminescence properties of pyronin Y dye–clay films: an experimental and theoretical study

Epelde-Elezcano

Martínez‐Martínez

Duque-Redondo

et al. 2016

Phys. Chem. Chem. Phys.

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The aggregation process, particularly the type and extent of pyronin Y (PY) laser dye intercalated into supported thin films of two different trioctahedral clay minerals, LAPONITE® (Lap) and saponite (Sap), at different dye loadings is studied: (i) experimentally by means of electronic absorption and fluorescence spectroscopy and (ii) theoretically by modeling the distribution of the dye into the interlayer space of these layered silicates. According to the results, H-type aggregates of the PY dye are favoured in Lap even at very low dye loading while a much lower molecular aggregation tendency in J-type geometry is found in Sap films. The aggregation state of PY in each clay mineral is likely attributed to different strengths of the electrostatic interactions between the dye and the layered silicate in the interlayer space due to their distinctive charge localization on the TOT clay layer (i.e. net negative charge in octahedral layers for Lap vs. in tetrahedral layers for Sap), as well as the interlaminar water distribution in each clay mineral, although other factors such as their CEC and particle size cannot be discarded. To reduce the huge aggregation processes of PY dye into Lap films, surfactant molecules (DDTAB) are co-adsorbed in the interlayer space of the clay. At an optimized surfactant concentration, the aggregation tendency of PY dye in Lap is considerably reduced enormously improving the fluorescence efficiency of the PY/Lap films. Finally, by means of anisotropic response from the hybrid films to the plane of the polarized light, the orientation of the PY molecules with respect to the normal axis of the clay layer is determined for all films (with and without surfactant) at different dye loadings.

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“…Other researchers also reported that the surface of the clay sheets changes to a hydrophobic state after the cation exchange reaction 56 . Another change in the IR spectrum is the disappearance of the 1640 cm −1 peak of interlayer water molecules, which are replaced by cationic dye monomers 57 …”

Section: Resultsmentioning

confidence: 95%

Application of dye saturated clay adsorbent from dyeing wastewater as textile printing pigment

Rahimi

Alihosseini

2022

J of Chemical Tech & Biotech

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Background Adsorption by cheap materials (like clay and activated carbon) is one of the most effective methods for treating dye wastewaters, especially for cationic dyes. Although activated carbon has a black residue, the unique nanostructure of clay adsorbs dye molecules between its layers and produces a colored sludge. Dye intercalated clays were also introduced as possible coloring pigments. This work tries to combine the wastewater treatment and hybrid pigment production processes so that the remaining sludge of the process can be used as a printing pigment. Results Bentonite clay was examined for treating real dye wastewater from the textile industry containing four cationic dyes. The adsorption mechanism of all dyes was studied individually, and the results show that bentonite has a minimum adsorption capacity of 467 mg/g for Basic Red 46 dye based on the Langmuir model. The adsorption process decreased the turbidity by about 86% and reduced the total dissolved solids (TDS) and chemical oxygen demand (COD) of wastewater. The produced hybrid showed a nano‐layer structure according to the field emission scanning electron microscopy (FESEM). Differential thermal analysis (DTA) shows that the thermal stability of the pigment improved by about 30 °C compared to the pristine dye. Fourier transform infrared (FTIR) and thermogravimetric analysis (TGA) showed that the dye: bentonite ratio should be adjusted at a medium level to control the hydrophilicity of the hybrid and improve its miscibility in binders. Conclusion The produced pigment was printed on cotton fabric with a desirable visual color appearance and showed acceptable rubbing and light fastnesses. The result indicates that wastewater sludge from this adsorption process could be applicable as an industrial pigment. © 2022 Society of Chemical Industry (SCI).

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Pyronin Y (basic xanthene dye)-bentonite composite: A spectroscopic study

Cited by 8 publications

References 63 publications

Preparation and characterization of “green” hybrid clay-dye nanopigments

Preparation and characterization of “green” hybrid clay-dye nanopigments

Strategies for modulating the luminescence properties of pyronin Y dye–clay films: an experimental and theoretical study

Application of dye saturated clay adsorbent from dyeing wastewater as textile printing pigment

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