637246 Sigma-Aldrich

Silicon dioxide

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

Synonym: Silica, Silicon dioxide



Related Categories 14: Si, Biomedical Materials, Materials Science, Metal and Ceramic Science, Nanomaterials,
assay   99.5% trace metals basis
form   nanopowder (spherical, porous)
particle size   5-20 nm (TEM)
surface area   590-690 m2/g (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



250, 500 g in poly drum

50 g in glass bottle


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.

Safety & Documentation

Safety Information

Personal Protective Equipment 
NONH for all modes of transport
WGK Germany 
Protocols & Articles


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

Dr. Siddharth V. Patwardhan Department of Chemical and Process Engineering University of Strathclyde, 75 Montrose Street Glasgow G1 1XJ, UK Email:
Keywords: Adsorption, Agriculture, Apoptosis, Cancer, Catalysis, Condensations, Cosmetics, Deposition, Environmental, Enzyme activity, Green chemistry, Hydration reaction, Immobilization, Microwave synthesis, Nanomaterials, Pharmaceutical, Precipitation, Reductions, Separation, Sol-gel, Solvents

Materials for Clean H2 Production from Bioethanol Reforming

Hong Xie, Eric Weitz, and Kenneth R. Poeppelmeier* Center for Catalysis and Surface Science, Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, Illinois 60208 *krp@northwes...
Keywords: Absorption, Adsorption, Boudouard reaction, Catalysis, Dehydration reaction, Dehydrogenation, Deposition, Fermentation, Polymerization reactions, Precipitation, Redox Reactions, Renewable energy, Surface Science

Recent Developments in Silicon Anode Materials for High Performance Lithium-Ion Batteries

Xuefeng Song,1* Xiaobing Wang,2 Zhuang Sun,1 Peng Zhang,1 and Lian Gao1 1State Key Laboratory for Metallic Matrix Composite Materials, School of Materials Science and Engineering, Shanghai Jiao Tong ...
Keywords: Automotive, Deposition, Diffusion, Electrochemical reactions, Environmental, Lithiations, Materials Science, Microscopy, Nanomaterials, Nanotubes, Polymerization reactions, Reductions, Scanning electron microscopy, Transmission electron microscopy

Self-Assembled Nanodielectrics (SANDs) for Unconventional Electronics

The field of unconventional electronics represents a new opportunity for the semiconductor and electronics industries.1 This broad field encompasses both “printed organic/inorganic” and “transparent”...
Antonio Facchetti, Tobin J. Marks
Keywords: Absorption, Adhesion, Adsorption, Chemical vapor deposition, Deposition, Electronics, Evaporation, Industries, Microscopy, Nanomaterials, Nanotubes, Nucleic acid annealing, Reductions, Scanning electron microscopy, Semiconductor, Solvents, Spectroscopy

Peer-Reviewed Papers


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