IR radiation assisted preparation of KOH-activated polymer-derived carbon for methylene blue adsorption

Ефимов, М. Н.; Васильев, А. А.; Муратов, Д. Г.; Baranchikov, А. Е.; Карпачева, Г. П.

doi:10.1016/j.jece.2019.103514

Cited by 46 publications

(18 citation statements)

References 50 publications

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“…IR-PAN-a is a highly porous carbon material with a sponge-like structure ( Figure 2 ), inner spherical cavities of 0.5–2 μm with meso- and micropores distributed on their walls, an average micropore size of 0.66 μm, and an apparent BET surface area and pore volume of 2450 m 2 /g and 1.06 cm 3 /g, respectively [ 35 ]). Moreover, the total electric energy spent on the IR heating of IR-PAN-a particles was 2.95 kWh, whereas a conventional oven requires 5.72 kWh [ 47 ].…”

Section: Resultsmentioning

confidence: 99%

“…A new synthesis method for the preparation of highly porous polymer-derived microporous carbon materials using IR irradiation was recently developed [ 35 , 36 ]. In accordance with the protocol described in [ 35 ], PAN was first treated at 200 °C under IR heating in the air for 20 min. The obtained powders were impregnated with a KOH aqueous solution (ratio of precarbonized polymer/KOH = 1:1 w / w ).…”

Section: Methodsmentioning

confidence: 99%

“…A new synthesis method for the preparation of highly porous polymer-derived microporous carbon materials using infrared (IR) irradiation has recently been developed [ 35 , 36 ]. A nitrogen-containing highly porous carbon material, named IR-PAN-a, synthesized by the IR heating of polyacrylonitrile (PAN) with the activation of polymer transformation by KOH, was reported for the first time by the authors of [ 35 ]. It is important to emphasize that IR synthesis provides a considerable reduction of activation time (2 min at 800 °C).…”

Section: Introductionmentioning

confidence: 99%

“…According to N 2 adsorption measurements, the apparent BET surface area and pore volume of PAF-11 are equal to 240 m 2 /g and 0.35 cm 3 /g, respectively [ 29 ]. At the same time, the apparent BET surface area and pore volume of IR-PAN-a are equal to 2450 m 2 /g and 1.06 cm 3 /g, respectively [ 35 ]. Therefore, the pore volume and apparent surface area of IR-PAN-a are, respectively, 3 and 10 times higher than those of PAF-11.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, as mentioned by the authors of [ 22 ], PAF-like materials can be considered promising additives toward the reduction of physical aging in polymers of intrinsic microporosity, but the synthesis of such materials is quite complex and hinders commercial implementation. Therefore, investigations were conducted on the addition of hypercrosslinked polymers into PTMSP, i.e., poly(dichloroxylene) (p-DCX) [ 22 , 40 ] and hypercrosslinked polystyrene (HCL-PS) [ 41 ], which were first synthesized by Davankov et al [ 11 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 ]. From this perspective, a new type of IR-derived porous additive (IR-PAN) could be a promising alternative due to its energy- and time-efficient synthesis method.…”

Section: Introductionmentioning

confidence: 99%

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Aging of Thin-Film Composite Membranes Based on Crosslinked PTMSP/PEI Loaded with Highly Porous Carbon Nanoparticles of Infrared Pyrolyzed Polyacrylonitrile

et al. 2020

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The mitigation of the physical aging of thin-film composite (TFC) poly[1-trimethylsilyl-1-propyne] (PTMSP) membranes was studied via the simultaneous application of a polymer-selective layer crosslinking and mixed-matrix membrane approach. For the first time, a recently developed highly porous activated carbon material (infrared (IR) pyrolyzed poly[acrylonitrile] (PAN) or IR-PAN-a) was investigated as an additive to a PTMSP-selective layer for the reduction of aging in TFC membranes. The total electric energy spent on the IR irradiation treatment of IR-PAN-a particles was twice lower than conventional heating. The flat-sheet porous microfiltration membrane MFFK-1 was used as a support, and the crosslinked PTMSP/PEI loaded with a porous filler was applied as a selective layer (0.8–1.8 µm thick) to the TFC membranes. The initial IR-PAN-a sample was additionally milled to obtain a milled IR-PAN-aM sample with a monomodal particle size distribution of 500–800 nm. It was shown that IR-PAN-a, as a filler material with a high surface area and pore volume (2450 m2/g and 1.06 cm3/g, respectively) and a well-developed sponge-like structure, leads to the increase of the N2, O2, and CO2 permeance of PTMSP-based hybrid membrane material and the decrease of the aging of PTMSP. The simultaneous effect of crosslinking and the addition of a highly porous filler essentially improved the aging behavior of PTMSP-based TFC membranes. The monomodal and narrow particle size distribution of highly porous activated IR-pyrolyzed PAN is a key factor for the production of TFC membranes with reduced aging. The highest stability was achieved by the addition of a milled IR-PAN-aM sample (10 wt%). TFC membrane permeance was 6300 GPU (30% of initial permeance) after 11,000 h of aging at ambient laboratory conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Aging of Thin-Film Composite Membranes Based on Crosslinked PTMSP/PEI Loaded with Highly Porous Carbon Nanoparticles of Infrared Pyrolyzed Polyacrylonitrile

et al. 2020

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Modification, Production, and Methods of KOH‐Activated Carbon

2022

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This review covers research on the use of potassium hydroxide (KOH) to produce and modify activated carbon. The methods employed for activation by considering the activation process, carbonization, temperature, activation time, and KOH ratio to material are described and how the surface area, surface morphology, and functional groups are affected by the KOH ratio. Characterization techniques and preparation conditions are summarized. The activated carbon pore structure mainly depends on the burn‐off size and the time for activation is linked to the overall activation reaction rate. The increase in surface area and pore size depends on the ratio of KOH, showing that KOH affects the surface chemistry of the activated carbon. The sorbent‐sorbate interactions are strongly influenced by different parameters, which were also calculated in this review and used to evaluate such interactions.

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A Novel Strategy to Prepare Hierarchically Porous Phenolic Resin‐Based Carbon Aerogel With Excellent Adsorption Performance

Zhang,

Liu,

et al. 2024

Journal of Polymer Science

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Carbon aerogel (CA), derived from phenolic (resorcinol and formaldehyde) resin, has being regarded as a promising porous adsorbent for water purification. In this study, we provided an effective strategy for preparing CA with a hierarchical porous microstructure. Acetic acid was introduced as an additive in the precursor solution to modify the microstructure of the xerogel, followed by KOH activation to further transform it into a hierarchical porous structure. The specific surface area of the hierarchical porous CA reached up to 1205.44 m2/g with a total pore volume exceeding 1.60 cm3/g. Consequently, the CA demonstrated an excellent adsorption rate, reaching adsorption equilibrium in approximately 240 min and exhibited a remarkable maximum dye adsorption capacity of 1.25 times its own mass. Furthermore, the adsorption processes of the CA for dye adhered to the second‐order kinetic model and the Langmuir isotherm model. This study provided an effective approach to preparing hierarchical porous CA for efficient adsorption of organic pollutants for water purification.

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IR radiation assisted preparation of KOH-activated polymer-derived carbon for methylene blue adsorption

Cited by 46 publications

References 50 publications

Aging of Thin-Film Composite Membranes Based on Crosslinked PTMSP/PEI Loaded with Highly Porous Carbon Nanoparticles of Infrared Pyrolyzed Polyacrylonitrile

Aging of Thin-Film Composite Membranes Based on Crosslinked PTMSP/PEI Loaded with Highly Porous Carbon Nanoparticles of Infrared Pyrolyzed Polyacrylonitrile

Modification, Production, and Methods of KOH‐Activated Carbon

A Novel Strategy to Prepare Hierarchically Porous Phenolic Resin‐Based Carbon Aerogel With Excellent Adsorption Performance

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