Preparation of amorphous silica by acid dissolution of sepiolite: kinetic and textural study

Hernández, Luis González; Rueda, L. Ibarra; Díaz, Arturo Pulido; Antón, Celia Chamorro

doi:10.1016/0021-9797(86)90290-0

Cited by 40 publications

(2 citation statements)

References 8 publications

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“…The amorphous silica resulting from such a treatment is morphologically fibrous, with tetrahedral layers similar to those in the original sepiolite. This was previously observed in other sepiolites treated with various mineral acids (22,23). Figure 4 shows the 1 H MAS NMR spectra for the four sepiolites following thermal evacuation at 393 K. The spectra for FIG.…”

Section: Characterization Of the Supportssupporting

confidence: 51%

Characterization of the Structure and Catalytic Activity of Pt/Sepiolite Catalysts

Aramendía

Boráu

Corredor

et al. 2000

Journal of Colloid and Interface Science

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Section: Characterization Of the Supportssupporting

confidence: 51%

Characterization of the Structure and Catalytic Activity of Pt/Sepiolite Catalysts

Aramendía

Boráu

Corredor

et al. 2000

Journal of Colloid and Interface Science

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“…The lixiviation of silver depends on the pH in the solution [19][20][21][22][23] (table 3). There is a significant difference in the pH values corresponding to n-Ag sepiolite.…”

Section: Resultsmentioning

confidence: 99%

The antibacterial and antifungal activity of a soda-lime glass containing silver nanoparticles

et al. 2009

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The antibacterial and antifungal activity of a low melting point soda-lime glass powder containing silver nanoparticles has been studied. Nano-Ag sepiolite fibres containing monodispersed silver nanoparticles (d(50) approximately 11 +/- 9 nm) were used as the source of silver. This powder presents a high antibacterial (against gram-positive and gram-negative bacteria) as well as antifungal (against I. orientalis) activity. The observed high activity against yeast has been explained by considering the inhibitory effect of the Ca(2+) lixiviated from the glass on the growth of the yeast colonies.

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Enhanced interaction in the polyimide/sepiolite hybrid films via acid activating and polydopamine coating of sepiolite

Kim

Choi

Jeong

et al. 2018

Polymers for Advanced Techs

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We aimed at enhancing interaction in the polyimide/sepiolite hybrid films with the loading of sepiolite in the polyimide matrix ranged from 0 to 8 wt% via acid activating and polydopamine doping. First, sepiolite was treated with a 3M HCl solution under reflux conditions. Then the acid-activated sepiolite was coated by mussel-inspired polydopamine under alkaline conditions.The coated polydopamine was found to successfully enhance dispersibility of sepiolite in the polyimide matrix. The modification of the sepiolite in the hybrid films was investigated by Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, field emission scanning electron microscopy, thermogravimetric analysis, and transmission electron microscope. The results indicated that polydopamine coating could increase interaction between the polyimide matrix and sepiolite. KEYWORDS acid activation, polydopamine, polymer/clay nanocomposite, pyromellitic dianhydride-4,4′oxydianiline polyimide, sepiolite

show abstract

Preparation of amorphous silica by acid dissolution of sepiolite: kinetic and textural study

Cited by 40 publications

References 8 publications

Characterization of the Structure and Catalytic Activity of Pt/Sepiolite Catalysts

Characterization of the Structure and Catalytic Activity of Pt/Sepiolite Catalysts

The antibacterial and antifungal activity of a soda-lime glass containing silver nanoparticles

Enhanced interaction in the polyimide/sepiolite hybrid films via acid activating and polydopamine coating of sepiolite

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