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637246

Sigma-Aldrich

Sílice

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

Sinónimos:

Dióxido de silicio

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About This Item

Fórmula lineal:
SiO2
Número de CAS:
7631-86-9
Peso molecular:
60.08
EC Number:
231-545-4
MDL number:
MFCD00011232
UNSPSC Code:
12352302
PubChem Substance ID:
24882840
NACRES:
NA.23

Quality Level

100

assay

99.5% trace metals basis

form

nanopowder (spherical, porous)

surface area

590-690 m2/g , TEM

particle size

5-20 nm (TEM)

bp

2230 °C (lit.)

mp

>1600 °C (lit.)

density

2.2-2.6 g/mL at 25 °C

bulk density

0.068 g/mL

SMILES string

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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General description

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.

Storage Class

11 - Combustible Solids

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

Certificados de análisis (COA)

Busque Certificados de análisis (COA) introduciendo el número de lote del producto. Los números de lote se encuentran en la etiqueta del producto después de las palabras «Lot» o «Batch»

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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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Bio-Inspired “Green” Synthesis of Nanomaterials and their Applications

Silica is a very popular inorganic nanomaterial used in a wide range of applications including fillers for rubber, catalyst supports, separation media, carriers in food and agriculture, and abrasive/anticaking agents in cosmetics. It is also widely believed to be an important material for biomedical applications for following reasons.

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