Inverse gas chromatography for natural fibre characterisation: Identification of the critical parameters to determine the Brunauer–Emmett–Teller specific surface area

Legras, A.; Kondor, Anett; Heitzmann, Michael; Truss, R. W.

doi:10.1016/j.chroma.2015.11.033

Cited by 47 publications

(24 citation statements)

References 32 publications

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“…Also, based on the measurements of the isothermal nitrogen sorption for the composites, we could obtain the specific surface area of 55.8 m 2 ⋅g −1 for the composites, using the Brunauer‐Emmett‐Teller (BET) equation . Finally, the magnetic hysteresis loop was measured at room temperature for the nZVI/CSs, as shown in Figure .…”

Section: Resultscontrasting

confidence: 63%

Monodispersed Zerovalent Iron Nanoparticles Decorated Carbon Submicrospheres for Enhanced Removal of DDT from Aqueous Solutions

Kang

Wang

et al. 2019

ChemistrySelect

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A simple route is presented to fabricate the nano zero‐valent iron/carbon sphere (nZVI/CSs) composites via Fe2+ ion‐adsorption and then reduction reaction on the pre‐prepared CSs. The nZVI/CSs composites with monodispersed nZVI particles are successfully fabricated. The monodispersed nZVI particles with 30–50 nm in size are uniformly decorated on the sub‐microsized CSs with about 250 nm in diameter. These nZVI/CSs composites are of enough high specific surface area (about 55.8 m2⋅g−1) and good ferromagnetism. Importantly, such nZVI/CSs have exhibited significantly stronger and faster removal performances to the organic pollutants compared with the pure nZVI and pure CSs, in addition to the easy separation from solutions. Typically, in the DDT [or 1,1,1‐trichloro‐2, 2‐bis(4‐chlorophenyl)ethane] aqueous solution with 10 ppm, more than 95% of DDT content can be removed within 140 min after adding 1.0 g⋅L−1 nZVI/CSs. The capacity of removal is up to 15.6 mg⋅g−1, remarkably larger than the previously reported one (2.5 mg⋅g−1) by carbon nanotubes. This is attributed to the synergistic effects from the CSs’ high adsorptivity and nZVI's strong reducibility. This study not only provides a new candidate material for the treatment of the DDT‐polluted environments, but also deepens understanding the process of DDT removal.

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Section: Resultscontrasting

confidence: 63%

Monodispersed Zerovalent Iron Nanoparticles Decorated Carbon Submicrospheres for Enhanced Removal of DDT from Aqueous Solutions

Kang

Wang

et al. 2019

ChemistrySelect

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“…BET surface area was 1.56±0.02 m²/g. This result is higher than those reported by Legras et al [45] for macroporous cellulose BioMid ® and kenaf fibers. In addition, the structure of the PFS fibers could mean that the immobilization of trypsin could be done only on the monolayer of the carrier.…”

Section: Adsorption and Superficial Areacontrasting

confidence: 70%

Valorization of Passion Fruit Stalk by the Preparation of Cellulose Nanofibers and Immobilization of Trypsin

et al. 2020

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Fibers from passion fruit stalks were first recovered with a pulping and bleaching process. Two mechanical treatments were further applied to the fibers, homogenization (with and without ultrasound), and blender application. The effect of those treatments on fibers was evaluated. The chemical composition of the different stages of fibers undergoing treatment were measured according to TAPPI standards and were also analyzed by SEM, FTIR, and XRD. Trypsin was immobilized by adsorption and by covalent binding. The biocatalyst support-trypsin was evaluated in terms of immobilization yield, retention, and enzymatic activity. The experimental results demonstrated that the final cellulose concentration in the fibers was 44 % higher than that in the raw stalks. The cellulose nanofibers obtained by homogenization presented a size distribution between 20-200 nm, and the application of ultrasound did not show a significant effect on size (between 50 to 300 nm). Trypsin immobilized using glycidol presented an immobilization yield of 67 % and presented higher retention and enzymatic activity (1.17±0.05 U/mg protein and 44.0±2.0 %, respectively). These results show that passion fruit stalks can be successfully used as a source of cellulose nanofibers and also can be used as carriers for the immobilization of trypsin.

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“…Previous studies also reported the adsorption of xyloglucan on cellulose nanocrystals (Dammak, Quémener et al, 2015;Gu & Catchmark, 2013;Lopez et al, 2010) with a maximal adsorption between 98-333 mg XG /g cellulose . The higher amount of adsorbed XG on cellulose nanocrystals as substrates is due to the much higher specific surface area of CNC that range from 150 to 800 m²/g (Brinkmann et al, 2016;Habibi, 2014), as compared to that of flax fibres, roughly 1 m²/g (Bismarck et al, 2002;le Duigou, Bourmaud, Balnois, Davies, & Baley, 2012;Legras, Kondor, Heitzmann, & Truss, 2015;Müssig, Fischer, Graupner, & Drieling, 2010), even if fibre swelling could contribute to improve specific surface area. Fig.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Adsorption of xyloglucan and cellulose nanocrystals on natural fibres for the creation of hierarchically structured fibres

Doineau

Bauer

Ensenlaz³

et al. 2020

Carbohydrate Polymers

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Green treatment of natural fibres is a major issue in paper, textile and biocomposites industries to design innovative and eco-friendly products. In this work, hierarchical structuring of flax woven fabrics by the adsorption of xyloglucan (XG) and cellulose nanocrystals (CNC) is studied. Indeed, CNC have high mechanical properties, high specific surface area and great potential for functionalization. The adsorption of XG and CNC has been investigated in terms of localization by confocal and scanning electron microscopy (SEM) and quantification through adsorption isotherms. Adhesion force measurements have also been performed by Atomic Force Microscopy (AFM). XG and CNC are homogeneously adsorbed on flax fabric and adsorption isotherms reach plateau values around 20 mg /g fibres for both. The pre-adsorption of XG on flax fabric influences the amount of adsorbed CNC in the high concentrations and also creates entanglements and strong interactions between XG and CNC with the formation of an extensible network.

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Inverse gas chromatography for natural fibre characterisation: Identification of the critical parameters to determine the Brunauer–Emmett–Teller specific surface area

Cited by 47 publications

References 32 publications

Monodispersed Zerovalent Iron Nanoparticles Decorated Carbon Submicrospheres for Enhanced Removal of DDT from Aqueous Solutions

Monodispersed Zerovalent Iron Nanoparticles Decorated Carbon Submicrospheres for Enhanced Removal of DDT from Aqueous Solutions

Valorization of Passion Fruit Stalk by the Preparation of Cellulose Nanofibers and Immobilization of Trypsin

Adsorption of xyloglucan and cellulose nanocrystals on natural fibres for the creation of hierarchically structured fibres

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