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637246

Sigma-Aldrich

Silice

nanopowder (spherical, porous), 5-20 nm particle size (TEM), 99.5% trace metals basis

Synonyme(s) :

Dioxyde de silicium

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About This Item

Formule linéaire :
SiO2
Numéro CAS:
7631-86-9
Poids moléculaire :
60.08
Numéro CE :
231-545-4
Numéro MDL:
MFCD00011232
Code UNSPSC :
12352302
ID de substance PubChem :
24882840
Nomenclature NACRES :
NA.23

Niveau de qualité

100

Pureté

99.5% trace metals basis

Forme

nanopowder (spherical, porous)

Superficie

590-690 m2/g , TEM

Taille des particules

5-20 nm (TEM)

Point d'ébullition

2230 °C (lit.)

Pf

>1600 °C (lit.)

Densité

2.2-2.6 g/mL at 25 °C

Masse volumique apparente

0.068 g/mL

Chaîne SMILES 

O=[Si]=O

InChI

1S/O2Si/c1-3-2

Clé InChI

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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Catégories apparentées

Description générale

Porous silicon dioxide nanopowder, also known as silica or silicon dioxide is a fine, white powder with a porous structure. It is composed of nanoscopic particles of silicon dioxide, 5-20 nm in size and has a high surface area due to its porous structure.

Application

Silicon dioxide finds applications in various fields, ranging from catalysis to composite synthesis. Some major studies are listed here:
  • Pickering emulsion polymerization using a silicon dioxide nanoparticle stabilizer to form molecularly imprinted polymers for steroid recognition.
  • Mesoporous silica is used as a catalyst support in the preparation of multiwalled carbon nanotubes (MWCNTs).
  • It is used as a ring opening of tetrahydrofuran-dimethanol to 1,2,6-hexanetriol.
  • It maybe used to prepare silica/brominated poly(phenylene oxide) nanocomposites membranes for CO2 seperations.
  • The composite scaffold of chitosan/chondroitin sulfate/nano-SiO2 was fabricated by lyophilization.
  • Nanocomposites preparation of silica, single-wall carbon nanotubes, and graphite nanoplatelets in an epoxy matrix have been reported.6
  • Dielectric spectroscopy study of the polystyrene/nanosilica model system has been studied.
  • PMMA SiO2 nanocomposites were reported to be synthesized.

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

nwg

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

dust mask type N95 (US), Eyeshields, Gloves

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Certificats d'analyse (COA)

Lot/Batch Number
MKCK7810
MKCH7808
MKCH3318
MKCF5996
MKCC2982

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Retrouvez la documentation relative aux produits que vous avez récemment achetés dans la Bibliothèque de documents.

Consulter la Bibliothèque de documents

Effect of surface modification of silica nanoparticles on toxicity and cellular uptake by human peripheral blood lymphocytes in vitro
Lankoff A, et al.
Nanotoxicology, 7(3), 235-250 (2011)
Molecularly imprinted polymer beads prepared by pickering emulsion polymerization for steroid recognition
Zhou T, et al.
Journal of Applied Polymer Science, 131(1) (2014)
Carbon nanotube bundles self-assembled in double helix microstructures.
Cervantes-Sodi F, et al.
Carbon, 50(10), 3688-3693 (2010)
Nanocomposite membranes for CO2 separations: silica/brominated poly (phenylene oxide)
Hu X, et al.
Industrial & Engineering Chemistry Research, 46(5), 1547-1551 (2007)
Catalyst studies on the ring opening of tetrahydrofuran-dimethanol to 1, 2, 6-hexanetriol
Buntara T, et al.
Catalysis Today, 210, 106-116 (2013)
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