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Merck
CN
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637246

Sigma-Aldrich

二氧化硅

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

别名:

二氧化硅

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About This Item

线性分子式:
SiO2
CAS号:
7631-86-9
分子量:
60.08
EC 号:
231-545-4
MDL编号:
MFCD00011232
UNSPSC代码:
12352302
PubChem化学物质编号:
24882840
NACRES:
NA.23

质量水平

100

检测方案

99.5% trace metals basis

形式

nanopowder (spherical, porous)

表面积

590-690 m2/g , TEM

粒径

5-20 nm (TEM)

bp

2230 °C (lit.)

mp

>1600 °C (lit.)

密度

2.2-2.6 g/mL at 25 °C

堆积密度

0.068 g/mL

SMILES字符串

O=[Si]=O

InChI

1S/O2Si/c1-3-2

InChI key

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

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相关类别

一般描述

多孔二氧化硅纳米粉，也称二氧化硅，是一种具有多孔结构的白色细小粉末。它由二氧化硅的纳米颗粒组成，尺寸为5-20纳米，由于多孔结构其具有高表面积。

应用

二氧化硅的应用广泛，从催化到复合合成。以下列举了一些主要研究：
  • 皮克林乳液聚合使用二氧化硅纳米稳定剂形成分子印迹聚合物的类固醇识别。
  • 在制备多壁碳纳米管 (MWCNT) 中，介孔二氧化硅被用作催化剂载体。
  • 用作四氢呋喃-二甲醇与 1,2,6-己三醇的开环反应。
  • 可用于制备用于分离 CO2 的二氧化硅/溴化聚苯醚纳米复合膜。
  • 采用冻干法制备壳聚糖/硫酸软骨素/纳米SiO2 复合支架。
  • 报告了在环氧基质中制备二氧化硅，单壁碳纳米管和石墨纳米片的纳米复合材料。6
  • 已经研究了聚苯乙烯/纳米二氧化硅模型系统的介电谱学研究。
  • 报告了 PMMA SiO2 纳米复合材料的合成。

WGK

nwg

闪点(°F)

Not applicable

闪点(°C)

Not applicable

个人防护装备

dust mask type N95 (US), Eyeshields, Gloves

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Catalyst studies on the ring opening of tetrahydrofuran-dimethanol to 1, 2, 6-hexanetriol
Buntara T, et al.
Catalysis Today, 210, 106-116 (2013)
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)
Nanocomposite membranes for CO2 separations: silica/brominated poly (phenylene oxide)
Hu X, et al.
Industrial & Engineering Chemistry Research, 46(5), 1547-1551 (2007)
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
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