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637246

Sigma-Aldrich

Silicon dioxide

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

Synonyma:

Silica, Nanosilica, Silicon dioxide

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About This Item

Lineární vzorec:
SiO2
Číslo CAS:
7631-86-9
Molekulová hmotnost:
60.08
EC Number:
231-545-4
MDL number:
MFCD00011232
UNSPSC Code:
12352302
PubChem Substance ID:
24882840
NACRES:
NA.23

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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Související kategorie

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

Osvědčení o analýze (COA)

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Navštívit knihovnu dokumentů

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)
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)
Laura Rubio et al.
Particle and fibre toxicology, 16(1), 40-40 (2019-10-31)
Amorphous silica nanoparticles (SiO2 NPs) have been regarded as relatively benign nanomaterials, however, this widely held opinion has been questioned in recent years by several reports on in vitro and in vivo toxicity. Surface chemistry, more specifically the surface silanol
Carbon nanotube bundles self-assembled in double helix microstructures.
Cervantes-Sodi F, et al.
Carbon, 50(10), 3688-3693 (2010)
Zobrazit všechny související dokumenty

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