Polyvinylpyrrolidone Adsorption and Structural Studies on Homoionic Li-, Na-, K-, and Cs-Montmorillonite Colloidal Suspensions

Séquaris, J.‐M.; Decimavilla, S. Camara; Ortega, J.A. Corrales

doi:10.1006/jcis.2002.8422

Cited by 18 publications

(7 citation statements)

References 29 publications

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“…MtFe 0 -6 had the weakest microporous character with the n av value as high as 17.5. The SA value of 78 m 2 /g was obtained for Ca 2+ -Mt, which is consistent with the literature values of Mt in a nonswelling state (Rutherford et al, 1997;Séquaris et al, 2002). For all heterostructures, the SA values were lower than that of Ca 2+ -Mt and decreased as the Fe loadings increased.…”

Section: Isotherms Of Samplessupporting

confidence: 89%

A Critical Textural Evolution Study of Zerovalent Iron/Montmorillonite Nanosized Heterostructures Under Various Iron Loadings

Fan

Yuan

Bergaya

et al. 2011

Clays and clay miner.

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Abstract-Heterostructures formed by nanoparticles hybridized with porous hosts are of great potential in many practical applications such as catalysis, adsorption, and environmental remediation, based on their intrinsic properties. The objectives of this study were to synthesize zerovalent iron nanoparticles/ montmorillonite heterostructures and to investigate their textural evolution under different Fe loadings. Iron nanoparticles were hybridized with montmorillonite by impregnation of montmorillonite by ferric ions followed by chemical reduction with sodium borohydride in solution. These hybridized Fe nanoparticles were well dispersed on the montmorillonite surface, size adjustable, and resistant to oxidation under the protection of native Fe-oxide shells. The textural evolution of these heterostructures under various Fe loadings was investigated using nitrogen physisorption, X-ray diffraction, electron microscopy, and elemental analyses. As the Fe loadings increased, the total pore and mesopore volumes were almost unchanged; the total, micropore, and external surface areas as well as the micropore volume decreased; and the average pore diameter increased. These textural changes could be attributed to the filling of the interparticle pores of montmorillonite by a variable amount of Fe nanoparticles. In addition, with increasing Fe loadings, the mesoporous character was enhanced for these heterostructures. These fundamental results are important in understanding the structure of these heterostructures as well as in developing some novel applications in related fields.

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Section: Isotherms Of Samplessupporting

confidence: 89%

A Critical Textural Evolution Study of Zerovalent Iron/Montmorillonite Nanosized Heterostructures Under Various Iron Loadings

Fan

Yuan

Bergaya

et al. 2011

Clays and clay miner.

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“…), active carbons, fibers or exfoliated graphite and polymers are of interest as prospective materials for medicine, biotechnology, and industry [367][368][369][370][371][372]. Immobilization of water-soluble polymers (e.g.…”

Section: Polymer/oxide Systemsmentioning

confidence: 99%

TSDC spectroscopy of relaxational and interfacial phenomena

Gun'ko

Zarko

Goncharuk

et al. 2007

Advances in Colloid and Interface Science

132

167

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“…[1][2][3][4][5][6][7][8][9]. Immobilization of water-soluble polymers onto a surface of fumed silica (or other hydrophilic metal oxides having surface hydroxyls) from aqueous media can cause substantial diminution of the dispersivity and the specific surface area (by half) of the dried powder materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. This effect is rather negative because it leads to a reduction of the adsorption capacity, the particle mobility in liquid media and negative changes of other characteristics.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposites with fumed silica/poly(vinyl pyrrolidone) prepared at a low content of solvents

Гунько

Воронин

Носач

et al. 2006

Applied Surface Science

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Polyvinylpyrrolidone Adsorption and Structural Studies on Homoionic Li-, Na-, K-, and Cs-Montmorillonite Colloidal Suspensions

Cited by 18 publications

References 29 publications

A Critical Textural Evolution Study of Zerovalent Iron/Montmorillonite Nanosized Heterostructures Under Various Iron Loadings

A Critical Textural Evolution Study of Zerovalent Iron/Montmorillonite Nanosized Heterostructures Under Various Iron Loadings

TSDC spectroscopy of relaxational and interfacial phenomena

Nanocomposites with fumed silica/poly(vinyl pyrrolidone) prepared at a low content of solvents

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