The chemical stabilization of methylene blue in colloidal dispersions of smectites

Lackovičová, Monika; Baranyaiová, Tímea Šimonová; Bujdák, Juraj

doi:10.1016/j.clay.2019.105222

Cited by 15 publications

(7 citation statements)

References 43 publications

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“…In hybrid systems, the nanocarrier is an important component that not only provides delivery but also the conditions for the PS to act effectively. Our nanomaterial was based on the synthetic layered silicate saponite (Sap), which has already been described as an optimal vehicle for different molecules [ 34 , 35 ]. Moreover, Sap has also manifested antimicrobial properties against Gram-negative bacteria of Escherichia coli [ 36 ].…”

Section: Introductionmentioning

confidence: 99%

Physico-Chemical Characterization and Antimicrobial Properties of Hybrid Film Based on Saponite and Phloxine B

et al. 2021

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This research was aimed at the preparation of a hybrid film based on a layered silicate saponite (Sap) with the immobilized photosensitizer phloxine B (PhB). Sap was selected because of its high cation exchange capacity, ability to exfoliate into nanolayers, and to modify different surfaces. The X-ray diffraction of the films confirmed the intercalation of both the surfactant and PhB molecules in the Sap film. The photosensitizer retained its photoactivity in the hybrid films, as shown by fluorescence spectra measurements. The water contact angles and the measurement of surface free energy demonstrated the hydrophilic nature of the hybrid films. Antimicrobial effectiveness, assessed by the photodynamic inactivation on hybrid films, was tested against a standard strain and against methicillin-resistant bacteria of Staphylococcus aureus (MRSA). One group of samples was irradiated (green LED light; 2.5 h) and compared to nonirradiated ones. S. aureus strains manifested a reduction in growth from 1-log10 to over 3-log10 compared to the control samples with Sap only, and defects in S. aureus cells were proven by scanning electron microscopy. The results proved the optimal photo-physical properties and anti-MRSA potential of this newly designed hybrid system that reflects recent progress in the modification of surfaces for various medical applications.

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Section: Introductionmentioning

confidence: 99%

Physico-Chemical Characterization and Antimicrobial Properties of Hybrid Film Based on Saponite and Phloxine B

et al. 2021

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“…Ultrafine noble metal nanoparticles with a diameter of less than 5 nm exhibited ultrahigh catalytic activities towards organic pollutants due to their large surface area to provide enough activity sites for electron transfer (Gong et al, 2019). Hence, the catalytic activity of the synthesized samples was evaluated by the reduction of carcinogenic toxic organic pollutant methylene blue (MB) in the presence of reduced agent NaBH 4 (Jana et al, 2019;Joseph et al, 2019;Lackovičová et al, 2019). The reduction process was monitored by a time-resolved UV-Vis spectroscopy.…”

Section: Catalytic Properties Of Smt@cof@au Nps Heterostructurementioning

confidence: 99%

Towards mass production of a spherical montmorillonite@covalent organic framework@gold nanoparticles heterostructure as a high-efficiency catalyst for reduction of methylene blue

Wang

Pan

et al. 2021

Applied Clay Science

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“…Several authors have studied the adsorption of methylene blue from aqueous systems using clays [41][42][43][44][45][46] and zeolites [47][48][49][50][51][52] as adsorbents. In addition, we previously reported the use of ZnTiO 3 /TiO 2 to remove methylene blue.…”

Section: Introductionmentioning

confidence: 99%

Structuring of ZnTiO3/TiO2 Adsorbents for the Removal of Methylene Blue, Using Zeolite Precursor Clays as Natural Additives

et al. 2021

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Adsorption is an effective method of removing harmful pollutants from air and water. In the present study, zeolites prepared by sol-gel method from two Ecuadorian clays were combined with precursor clays and the ZnTiO3/TiO2 semiconductor for adsorbing methylene blue (MB) as a water contaminant. The synthesized compounds were characterized using powder X-ray diffraction, X-ray fluorescence, scanning electron microscopy, energy dispersive X-ray, and surface area measurement. These compounds were combined to form cylindrical extrudates of 0.2 cm (diameter) and 1.0 cm (length). The adsorption characteristics of the composites were measured using batch sorption studies as a function of pH, initial concentration, and contact time. The pseudo-second-order model and the Langmuir isotherm model were better suited to the adsorption process. The equilibrium state was achieved around 180 min of adsorption, and a pH of 7 was established as the optimal operating condition. The maximum adsorption values of the dye were obtained with the composites derived from G-Clay, whose average adsorption capacity was 46.36 mg g−1, in contrast with composites derived from R-Clay, whose average adsorption value was 36.24 mg g−1. The results reflect that synthesized composites could be used potentially for the removal of cationic dye from wastewater.

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The chemical stabilization of methylene blue in colloidal dispersions of smectites

Cited by 15 publications

References 43 publications

Physico-Chemical Characterization and Antimicrobial Properties of Hybrid Film Based on Saponite and Phloxine B

Physico-Chemical Characterization and Antimicrobial Properties of Hybrid Film Based on Saponite and Phloxine B

Towards mass production of a spherical montmorillonite@covalent organic framework@gold nanoparticles heterostructure as a high-efficiency catalyst for reduction of methylene blue

Structuring of ZnTiO3/TiO2 Adsorbents for the Removal of Methylene Blue, Using Zeolite Precursor Clays as Natural Additives

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