Multi-carboxylic magnetic gel from hyperbranched polyglycerol formed by thiol-ene photopolymerization for efficient and selective adsorption of methylene blue and methyl violet dyes

Song, Yiheng; Duan, Yixing; Zhou, Li

doi:10.1016/j.jcis.2018.06.005

Cited by 78 publications

(19 citation statements)

References 60 publications

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“…A common approach to investigate the adsorption behavior of materials containing activated carbon is the use of methylene blue (MB) as model organic dye . As the adsorption behavior of MB is highly sensitive to pH and ionic strength due to its cationic nature and due to the well‐known possible effects of pH‐value and ionic strength on the adsorption behavior of activated carbon, the pH‐value was fixed to pH 7–8 by using deionized water as described in Section . For a later application of the developed supraparticles in waste water, no such adaption of pH value and ionic strength would be possible due to the vast amounts of chemicals that would be necessary.…”

Section: Resultsmentioning

confidence: 99%

Adsorber Particles with Magnetically‐Supported Improved Electrochemical Conversion Behavior for Waste Water Treatment Processes

Schneider

Tschöpe

Hanselmann

et al. 2020

Part & Part Syst Charact

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Micron‐sized supraparticles, consisting of a plurality of discrete nano‐ and microscale functional units, are assembled and fused by means of a droplet extrusion process. By combining nano magnetite, activated carbon, and conductive carbon with a polymeric binder matrix, particles are obtained which unite good magnetic properties, electrical conductivity, and adsorber activity through the high accessible surface area of the incorporated activated carbon of about 570 m2 g−1, thereby enabling a new approach toward sustainable water treatment processes. Due to the interplay of the components, it is possible to adsorb target substances, dissolved in the water which is demonstrated by the adsorption of the model dye methylene blue. A very fast adsorption kinetic and an adsorption capacity of about 400 mg g−1 is determined. By using the developed composite particles, it is also possible to electrochemically alter substances flowing through a magnetically‐stabilized fluidized‐bed reactor by electrochemically charging/discharging, significantly supported by the magnetic field enabling alternatingly optimum mobility/adsorption phases with contact/charging intervals. The electrochemical conversion can be increased up to 151% depending on the applied flow‐rate and electrical voltage. By applying an external magnetic field, a further increase of electrochemical conversion of up to 70% can be observed.

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Section: Resultsmentioning

confidence: 99%

Adsorber Particles with Magnetically‐Supported Improved Electrochemical Conversion Behavior for Waste Water Treatment Processes

Schneider

Tschöpe

Hanselmann

et al. 2020

Part & Part Syst Charact

View full text Add to dashboard Cite

show abstract

“…For this purpose, the model organic dye methylene blue (MB) was used, which is a common approach to evaluate the adsorption behavior of carbons toward organic pollutants in water . Because it is well known that MB is a cationic dye whose adsorption is highly sensitive to both pH and ionic strength, we decided to fix these parameters by working in the conditions detailed in the Experimental Section, using a mixture of deionized water and ethanol (water:ethanol = 9:1) (pH 7–8). Figure depicts the adsorption kinetics and the adsorption isotherm of the carbon‐coated particles.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Carbon Composite Particles for Dye Adsorption from Water and their Electrochemical Regeneration

Schneider

Ballweg

Groß

et al. 2019

Part & Part Syst Charact

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Herein, the development of a novel composite particle system prepared from superparamagnetic Fe3O4@SiO2 microparticles as core and coated with a carbon shell is presented. The coating with carbon is done by pyrolyzing furan resin, which was previously deposited on the particle surface by poly‐merization of furfuryl alcohol. The novel composite material thus combines magnetic and sorptive properties. Upon pyrolysis the magnetic material is converted from magnetite to α‐iron and fayalite, changing its behavior from superparamagnetic to ferromagnetic with nearly zero remanence. The magnetic properties can be utilized to magnetically collect the particles dispersed in fluids, whereas the sorptive properties of the carbon shell can be used to remove organic contaminants from these fluids. The adsorption behavior of the composite particles and a potential electrochemical regeneration route are investigated, using the model dye methylene blue.

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“…The excellent adsorption performance of PANI/PSMA toward anionic dyes could be attributed to the strong interactions between the positively charged amino groups in PANI/PSMA and negatively charged SO 3 − groups in the anionic dyes. In contrast, MB and MV molecules contain positively charged amino groups, which electrostatically repulse PANI/PSMA, resulting in a poor adsorption performance [32].…”

Section: Effects Of the Dye Typementioning

confidence: 99%

Preparation of Polyaniline/Emulsion Microsphere Composite for Efficient Adsorption of Organic Dyes

Liu

Song

et al. 2020

Polymers

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Surface-functionalized polymeric microspheres have wide applications in various areas. Herein, monodisperse poly(styrene–methyl methacrylate–acrylic acid) (PSMA) microspheres were prepared via emulsion polymerization. Polyaniline (PANI) was then coated on the PSMA surface via in situ polymerization, and a three-dimensional (3D) structured reticulate PANI/PSMA composite was, thus, obtained. The adsorption performance of the composite for organic dyes under different circumstances and the adsorption mechanism were studied. The obtained PANI/PSMA composite exhibited a high adsorption rate and adsorption capacity, as well as good adsorption selectivity toward methyl orange (MO). The adsorption process followed pseudo-second-order kinetics and the Langmuir isotherm. The maximum adsorption capacity for MO was 147.93 mg/g. After five cycles of adsorption–desorption, the removal rate remained higher than 90%, which indicated that the adsorbent has great recyclability. The adsorbent materials presented herein would be highly valuable for the removal of organic dyes from wastewater.

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Multi-carboxylic magnetic gel from hyperbranched polyglycerol formed by thiol-ene photopolymerization for efficient and selective adsorption of methylene blue and methyl violet dyes

Cited by 78 publications

References 60 publications

Adsorber Particles with Magnetically‐Supported Improved Electrochemical Conversion Behavior for Waste Water Treatment Processes

Adsorber Particles with Magnetically‐Supported Improved Electrochemical Conversion Behavior for Waste Water Treatment Processes

Magnetic Carbon Composite Particles for Dye Adsorption from Water and their Electrochemical Regeneration

Preparation of Polyaniline/Emulsion Microsphere Composite for Efficient Adsorption of Organic Dyes

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