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637254

Sigma-Aldrich

Titanium(IV) oxide, anatase

nanopowder, <25 nm particle size, 99.7% trace metals basis

Synonym(s):

TiO2 nanopowder, Titanium dioxide

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50 G
$198.00
100 G
$379.00
500 G
$395.00

$198.00

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50 G
$198.00
100 G
$379.00
500 G
$395.00

About This Item

Linear Formula:
TiO2
CAS Number:
1317-70-0
Molecular Weight:
79.87
EC Number:
215-280-1
MDL number:
MFCD00011269
UNSPSC Code:
12352302
PubChem Substance ID:
24882841
NACRES:
NA.23

$198.00

In StockDetails

Request a Bulk Order

Quality Level

100

assay

99.7% trace metals basis

form

nanopowder

surface area

45-55 m2/g

particle size

<25 nm

mp

1825 °C (lit.)

density

3.9 g/mL at 25 °C (lit.)

bulk density

0.04‑0.06 g/mL

application(s)

battery manufacturing

SMILES string

O=[Ti]=O

InChI

1S/2O.Ti

InChI key

GWEVSGVZZGPLCZ-UHFFFAOYSA-N

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General description

Our titanium(IV) oxide, anatase nanopowder is a fine white powder composed of titanium dioxide nanoparticles with a particle size less than 25 nm. Anatase is a metastable polymorph of TiO2, which is less hard and less dense than the rutile polymorph. Optically, anatase nanopowder has a lower refractive index, absorbs less UV light, and exhibits greater photocatalytic activity than the rutile polymorph. Consequently, anatase is often preferred in applications where photocatalytic activity is desired, such as self-cleaning surfaces and solar cells.

Application

Titania paste may be used as a transparent coating for self cleaning glass.[1]Low optical scattering titania-acrylate nanocomposites have been reported.[2] Metal contacts in solar cells based on titanium dioxide and di-(isothiocyanate)-bis-(2,2′-bipyridyl-4,4′-dicarboxylate)ruthenium(II) have been studied.[3]

Storage Class

13 - Non Combustible Solids

wgk_germany

nwg

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000424034
0000424015
0000424034
0000424015
0000400865

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Preparation of small particles of titanium (IV) oxide
Mohs CR and Klabunde KJ
Nanophase Materials, 260, 121-124 (1994)
Mojca Pavlin et al.
International journal of molecular sciences, 23(11) (2022-06-11)
Alongside physiochemical properties (PCP), it has been suggested that the protein corona of nanoparticles (NPs) plays a crucial role in the response of immune cells to NPs. However, due to the great variety of NPs, target cells, and exposure protocols
Cell cycle synchronization reveals greater G2/M-phase accumulation of lung epithelial cells exposed to titanium dioxide nanoparticles
Medina-Reyes, et al.
Environmental Science and Pollution Research International, 1-7 (2014)
TiO2-Acrylate Nanocomposites Elaborated by UV-Curing with Tunable Properties.
Burunkova JA, et al.
Solid State Phenomena, 200, 173-177 (2013)
Nano-titanium oxide doped with gold, silver, and palladium - synthesis and structural characterization
Wanda Z, et al.
Chemical Papers, 68(7), 959-968 null
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Questions

1–10 of 12 Questions  

  1. Is this product hydrophilic or lipophilic? If it exhibits that property, could you please explain the reason behind it?

    1 answer

    1. TiO2 powders are generally considered to be hydrophilic, with anatase polymorphs being more so than rutile. Uncoated TiO2 powders such as this one also have more hydrophilic properties than inorganic- or organic-coated powders. Anatase has a high surface energy, which contributes to its ability to interact favorably with water molecules. This high energy facilitates the adsorption of water, leading to a hydrophilic surface. The presence of surface defects and the formation of hydroxyl groups (–OH) on the anatase surface enhance its affinity for water. The arrangement of Ti and O atoms in the tetragonal crystal structure allows for a more reactive surface compared to other polymorphs like rutile, which may have a more stable but less reactive surface.

      Helpful?

  2. Is this product a high-purity anatase phase TiO2 or Is it possible that the rutile phase is also included?

    1 answer

    1. This is a high purity anatase phase. There should not be rutile phase present.

      Helpful?

  3. 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

      Helpful?

  4. 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

      Helpful?

  5. Are the NP silanized? Do they need to be activated by UV for antimicrobial property?

    1 answer

    1. This product is packaged in glass vials and will not be salinized. Titanium (IV) oxide nanopowder has been proved to be the most active photocatalytic semiconductor under ultraviolet radiation. Ultraviolet (UV) light-mediated activation of titanium dioxide (TiO2) cleans the surface microenvironment through photocatalysis.

      Helpful?

  6. What is the morphology of Product 637254, Titanium(IV) oxide, anatase - nanopowder?

    1 answer

    1. According to the supplier, the morphology of this product is expected to be spherical.

      Helpful?

  7. What is the solubility of Product 637254, Titanium(IV) oxide, anatase - nanopowder?

    1 answer

    1. We do not test the solubility of this product. However, according to the chemicals encyclopedia published by the Royal Society of Chemistry, 13th edition, this product is insoluble in water, HCl, HNO3 and dilute H2SO4. It is soluble in hot concentrated H2SO4 and hydrofluoric acid.

      Helpful?

  8. How is Titanium(IV) oxide, anatase - nanopowder, Product 637254, manufactured?

    1 answer

    1. According to the manufacturer, product 637254 is produced by a process of calcination at 300°C.

      Helpful?

  9. What is the average particle size of Product 637254, Titanium(IV) oxide, anatase - nanopowder?

    1 answer

    1. Lot history shows that the average particle size of this product is about 5 nm. The batch-specific average will be reported on the certificate of analysis.

      Helpful?

  10. What possible solvents can be used with Titanium(IV) oxide, anatase - nanopowder?

    1 answer

    1. According to the chemicals encyclopedia published by the Royal Society of Chemistry (13th ed.), titanium (IV) oxide is soluble in hot, concentrated sulfuric acid and hydrofluoric acid. It is insoluble in water, hydrochloric acid, and nitric acid.

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1–10 of 12 Questions  

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