The "blue bottle" experiment in the colloidal dispersions of smectites

Šuteková, Monika; Bujdák, Juraj

doi:10.1016/j.dyepig.2020.109010

Cited by 4 publications

(3 citation statements)

References 39 publications

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“…The degradation of MB was slightly reduced to 89.1% with K = 0.0254 when BQ was added. Moreover, when h + trapping agent TEOA was added to the system and the sample was thoroughly shaken before UV-vis detection to remove the “blue bottle” effect, 33 the results showed that the MB degradation also had a slight reduction to 86.6% with K = 0.0243, which indicated the minor contribution of O 2 ˙ − and h + . In contrast, when MeOH/ l -His was added into the reaction system, the removal efficiency of MB remarkably decreased to 44.3%/55.2% with K = 0.0054/0.0055.…”

Section: Resultsmentioning

confidence: 99%

Novel hierarchical porous Fe₂O₃@GA composites for solar-Fenton catalysis of dyes

Li,

Qin,

Zhang

et al. 2024

Catal. Sci. Technol.

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Section: Resultsmentioning

confidence: 99%

Novel hierarchical porous Fe₂O₃@GA composites for solar-Fenton catalysis of dyes

Li,

Qin,

Zhang

et al. 2024

Catal. Sci. Technol.

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“…MB monomers characterized by an absorption band at 670 nm were observed in all samples. However, the colloids with higher concentrations of MB contained also significant amounts of H-dimers (610 nm) and H-aggregates (<600 nm) [ 34 ]. MB bulk concentrations were relatively low ( Table 3 ).…”

Section: Resultsmentioning

confidence: 99%

Modified Polymer Surfaces: Thin Films of Silicate Composites via Polycaprolactone Melt Fusion

Skoura

Boháč

Barlog

et al. 2022

IJMS

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Polymer/layered silicate composites have gained huge attention in terms of research and industrial applications. Traditional nanocomposites contain particles regularly dispersed in a polymer matrix. In this work, a strategy for the formation of a composite thin film on the surface of a polycaprolactone (PCL) matrix was developed. In addition to the polymer, the composite layer was composed of the particles of saponite (Sap) modified with alkylammonium cations and functionalized with methylene blue. The connection between the phases of modified Sap and polymer was achieved by fusing the chains of molten polymer into the Sap film. The thickness of the film of several μm was confirmed using electron microscopy and X-ray tomography. Surfaces of precursors and composite materials were analyzed in terms of structure, composition, and surface properties. The penetration of polymer chains into the silicate, thus joining the phases, was confirmed by chemometric analysis of spectral data and changes in some properties upon PCL melting. Ultimately, this study was devoted to the spectral properties and photoactivity of methylene blue present in the ternary composite films. The results provide directions for future research aimed at the development of composite materials with photosensitizing, photodisinfection, and antimicrobial surfaces.

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“…This phenomenon is believed to be associated with the formation of leuco-MB, the reduced state of MB. The leuco-MB is colourless [22]. Leuco-MB is easily re-oxidated into MB again and then the colour of the treated solution will turn back to bule.…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Study on the removal of methylene blue by submerged Arc generated by titanium and iron electrodes

Mo,

Yu,

Chen

et al. 2024

Phys. Scr.

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Methylene blue (MB) solution was treated by the submerged arc generated by the titanium (Ti) and iron (Fe) electrodes with a subsequent aging process. The removal ratio of each condition was recorded by the absorbance of treated solution. The experimental results indicated that the submerged arc with Fe electrodes is more efficient with an efficiency nearly 90% after a 3.5 minutes of treating time. Reversible decolorization was observed in the MB solution treated by the Fe submerged arc. However, the removal ratio in the MB solution treated by the Ti submerged arc continuously increased in both treating and aging process. Furthermore, the particles eroded from the Ti electrodes were characterized by SEM and XRD, and titanic oxides including TiO, TiO2 and Ti3O5 were found with different diameters between 1-20 μm. Moreover, complete decomposition occurred during the treatment by the submerged arc generated by the Ti electrodes. The eroded particles from the Fe electrodes were examined by XRD and the majority of the composition of particles was iron. Unlike the Ti electrodes, the decolorization process by the submerged arc of Fe electrodes was more likely to be the formation of colorless leuco-MB and the physical adsorption by iron hydroxides. Moreover, the pH and chemical oxygen demand (COD) of the treated solutions were also discussed.

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The "blue bottle" experiment in the colloidal dispersions of smectites

Cited by 4 publications

References 39 publications

Novel hierarchical porous Fe₂O₃@GA composites for solar-Fenton catalysis of dyes

Novel hierarchical porous Fe₂O₃@GA composites for solar-Fenton catalysis of dyes

Modified Polymer Surfaces: Thin Films of Silicate Composites via Polycaprolactone Melt Fusion

Study on the removal of methylene blue by submerged Arc generated by titanium and iron electrodes

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The "blue bottle" experiment in the colloidal dispersions of smectites

Cited by 4 publications

References 39 publications

Novel hierarchical porous Fe2O3@GA composites for solar-Fenton catalysis of dyes

Novel hierarchical porous Fe2O3@GA composites for solar-Fenton catalysis of dyes

Modified Polymer Surfaces: Thin Films of Silicate Composites via Polycaprolactone Melt Fusion

Study on the removal of methylene blue by submerged Arc generated by titanium and iron electrodes

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Novel hierarchical porous Fe₂O₃@GA composites for solar-Fenton catalysis of dyes

Novel hierarchical porous Fe₂O₃@GA composites for solar-Fenton catalysis of dyes