Highly fluorescent colloids based on rhodamine 6G, modified layered silicate, and organic solvent

Bujdák, Juraj; Iyi, Nobuo

doi:10.1016/j.jcis.2012.08.020

Cited by 11 publications

(6 citation statements)

References 35 publications

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“…Rhodamine 6G (Rh6G) also known as Rhodamine 590, belongs to the xanthenes family, which are largely used to synthesize drugs and to prepare dyes of the fluorescein and eosin class. Rhodamine 6G is a cationic polar dye with a rigid heterocyclic structure, which exhibits a strong absorption in the visible and an intense fluorescence (Magde et al, 1999;Bujdak and Iyi, 2012;Zehentbauer et al, 2014). Rh6G is widely used in acrylic, nylon, silk, wool and dyeing, it is the dye most used for dye laser applications and as a fluorescent tracer to visualize flow patterns as for example in the field of hydraulics (Tarud et al, 2010).…”

Section: Vbmentioning

confidence: 99%

Photocatalytic Degradation of Aqueous Rhodamine 6G Using Supported TiO2 Catalysts. A Model for the Removal of Organic Contaminants From Aqueous Samples

et al. 2020

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As a model for the removal of complex organic contaminants from industrial water effluents, the heterogeneous photocatalytic degradation of Rhodamin 6G was studied using TiO 2-derived catalysts, incorporated in water as suspension as well as supported in raschig rings. UV and Visible light were tested for the photo-degradation process. TiO 2 catalysts were synthesized following acid synthesis methodology and compared against commercial TiO 2 catalyst samples (Degussa P25 and Anatase). The bandgap (E g) of the TiO 2 catalysts was determined, were values of 2.97 and 2.98 eV were obtained for the material obtained using acid and basic conditions, respectively, and 3.02 eV for Degussa P25 and 3.18 eV for anatase commercial TiO 2 samples. Raschig ringssupported TiO 2 catalysts display a good photocatalytic performance when compared to equivalent amounts of TiO 2 in aqueous suspension, even though a large surface area of TiO 2 material is lost upon support. This is particularly evident by taking into account that the characteristics (XRD, RD, Eg) and observed photodegradative performance of the synthesized catalysts are in good agreement with the commercial TiO 2 samples, and that the RH6G photodegradation differences observed with the light sources considered are minimal in the presence of TiO 2 catalysts. The presence of additives induce changes in the kinetics and efficiency of the TiO 2-catalyzed photodegradation of Rh6G, particularly when white light is used in the process, pointing toward a complex phenomenon, however the stability of the supported photocatalytic systems is acceptable in the presence of the studied additives. In line with this, the magnitude of the chemical oxygen demand, indicates that, besides the different complex photophysical processes taking place, the endproducts of the considered photocatalytic systems appears to be similar.

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Section: Vbmentioning

confidence: 99%

Photocatalytic Degradation of Aqueous Rhodamine 6G Using Supported TiO2 Catalysts. A Model for the Removal of Organic Contaminants From Aqueous Samples

et al. 2020

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“…The above effects could suppress the non-radiative transition process of the dye molecules, while increasing the probability of radiative transitions could increase the uorescence intensity. [36][37][38][39] The decrease in uorescence intensity is owing to the continuous increase of organic solvents that may cause the uorescence of the dye to quench. 31,[40][41][42] Different solvent properties lead to different quenching concentration of dye solution.…”

Section: Fluorescence Spectroscopymentioning

confidence: 99%

Effect of ethylene glycol and its derivatives on the aggregation properties of reactive Orange 13 dye aqueous solution

Xie

et al. 2020

RSC Adv.

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“…A substantial reduction in dye aggregation can also be achieved by appropriate conditions. Dye aggregation is promoted in aqueous colloids, but can be minimized efficiently in non-aqueous environments (Bujdák & Iyi, 2012). Minimizing the dye/clay mineral ratio is also often reflected in the reduction of dye molecular aggregates.…”

Section: P H E N O M E N a A N D P R O P E Rt I E S R E L At E D T O mentioning

confidence: 99%

“…Intercalation compounds of hectorite and cationic phthalocyanines were prepared directly by refluxing oxide/hydroxide solution and the organic dye (Carrado et al, 1993). The combination of organoclays with adsorbed Rhodamine dye led to the formation of materials with large fluorescence yields (Bujdák & Iyi, 2012). The colloids and gels of these materials in xylene exhibited not only high luminescence but also perfect transparency because of the match between the refractive indices of the material and the solvent.…”

Section: S Y N T H E S I S O F Dy E / C L Ay M I N E R a L H Y B R I mentioning

confidence: 99%

Hybrid systems based on organic dyes and clay minerals: Fundamentals and potential applications

Bujdák

2015

Clay miner.

Self Cite

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This review summarizes several aspects of the interactions between organic dyes and clay minerals, and presents some interesting properties of hybrid materials based on these components. It explains the basic phenomena and photophysical properties of dye/clay mineral hybrid systems (DCHS) while examining the role of clay minerals in them. A brief history of using dyes as tools for clay research and on traditional materials based on DCHS is presented. Metachromasy, the phenomenon of colour change related to the formation of dye molecular aggregates is described in detail and analysed from various perspectives. The properties of DCHS, including photoactivity, luminescence, photocatalytic properties, optical anisotropy and non-linear optical properties are analysed in detail. Clay minerals often play a significant role in the occurrence of specific photophysical phenomena such as resonance energy transfer and luminescence quenching and may influence various reactions, such as conformational changes in dye molecules, photochromism, photoisomerization, photosensitization and other photochemical processes. Routes to synthesize various types of hybrid materials are also described here. The relevance of DCHS for clay research, chemistry and materials science is summarized briefly.

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Highly fluorescent colloids based on rhodamine 6G, modified layered silicate, and organic solvent

Cited by 11 publications

References 35 publications

Photocatalytic Degradation of Aqueous Rhodamine 6G Using Supported TiO2 Catalysts. A Model for the Removal of Organic Contaminants From Aqueous Samples

Photocatalytic Degradation of Aqueous Rhodamine 6G Using Supported TiO2 Catalysts. A Model for the Removal of Organic Contaminants From Aqueous Samples

Effect of ethylene glycol and its derivatives on the aggregation properties of reactive Orange 13 dye aqueous solution

Hybrid systems based on organic dyes and clay minerals: Fundamentals and potential applications

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