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Merck

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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国内现货,预计发货时间2025年4月23日详情


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50 G
$222.00
500 G
$550.00
250 G
$907.00

About This Item

线性分子式:
SiO2
CAS号:
分子量:
60.08
EC 号:
MDL编号:
UNSPSC代码:
12352302
PubChem化学物质编号:
NACRES:
NA.23

$222.00


国内现货,预计发货时间2025年4月23日详情


获取大包装报价

质量水平

方案

99.5% trace metals basis

表单

nanopowder (spherical, porous)

表面积

590-690 m2/g , TEM

粒径

5-20 nm (TEM)

沸点

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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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。[1]
  • 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。[2]
  • 用作四氢呋喃-二甲醇与 1,2,6-己三醇的开环反应。[3]
  • 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。[4]
  • 采用冻干法制备壳聚糖/硫酸软骨素/纳米SiO2 复合支架。[5]
  • 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。[6]
  • 报告了 PMMA SiO2 纳米复合材料的合成。

储存分类代码

11 - Combustible Solids

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


历史批次信息供参考:

分析证书(COA)

Lot/Batch Number

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

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Questions

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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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