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/418/501/product-dating-information-06-25-mk.pdf
637254
Titanium dioxide, anatase
nanopowder, <25 nm particle size, 99.7% trace metals basis
Synonym(s):
Nanotitania, TiO2 nanopowder, Titania, Titanium(IV) oxide, anatase, Titanium dioxide
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Product Name
Titanium(IV) oxide, anatase, nanopowder, <25 nm particle size, 99.7% trace metals basis
InChI key
GWEVSGVZZGPLCZ-UHFFFAOYSA-N
InChI
1S/2O.Ti
SMILES string
O=[Ti]=O
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
Quality Level
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This Item | 232033 | 248576 | 634662 |
|---|---|---|---|
| form nanopowder | form powder | form powder | form nanopowder |
| particle size <25 nm | particle size - | particle size −325 mesh | particle size <100 nm (BET), <50 nm (XRD) |
| assay 99.7% trace metals basis | assay 99.8% trace metals basis | assay ≥99% trace metals basis | assay 99.5% trace metals basis |
| density 3.9 g/mL at 25 °C (lit.) | density 3.9 g/mL at 25 °C (lit.) | density 3.9 g/mL at 25 °C (lit.) | density - |
| mp 1825 °C (lit.) | mp 1825 °C (lit.) | mp 1825 °C (lit.) | mp - |
| surface area 45-55 m2/g | surface area - | surface area - | surface area - |
Application
General description
Storage Class
13 - Non Combustible Solids
wgk
nwg
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
dust mask type N95 (US), Eyeshields, Gloves
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แกรฟีนเป็นโครงสร้างสองมิติที่ไม่ซ้ำกัน (2 มิติ) ของอะตอมคาร์บอน monolayer บรรจุลงในคริสตัลรังผึ้งหนาแน่นที่ดึงดูดความสนใจอย่างมากเนื่องจากคุณสมบัติที่หลากหลายและน่าสนใจ
เซลล์แสงอาทิตย์ที่ไวต่อสีย้อมเป็นเทคโนโลยีเซลล์แสงอาทิตย์ที่มีแนวโน้มและต้นทุนต่ำ
ไทเทเนียมไดออกไซด์ คุณลักษณะของวัสดุเซมิคอนดักเตอร์และฟังก์ชันการทำงานที่หลากหลาย
Controlled synthesis of metal clusters regulates ligands and atoms, advancing metal nanomaterial synthesis.
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How can I determine the shelf life / expiration / retest date of this product?
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Can we use this product as ETL layer for perovskite solar cells.
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This product can be used in photovoltaic applications. However, it has not been tested for use as an ETL for perovskite solar cells. Titanium dioxide in the anatase phase is commonly used for this purpose.
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Is this product hydrophilic or lipophilic? If it exhibits that property, could you please explain the reason behind it?
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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.
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Is this product a high-purity anatase phase TiO2 or Is it possible that the rutile phase is also included?
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This is a high purity anatase phase. There should not be rutile phase present.
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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Are the NP silanized? Do they need to be activated by UV for antimicrobial property?
1 answer-
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.
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What is the solubility of Product 637254, Titanium(IV) oxide, anatase - nanopowder?
1 answer-
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.
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What does "Trace Metal Basis" mean?
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For this product, the purity is determined by testing total metallic impurities. Our specifications only allow for a maximum of 1000 ppm. On the Certificate of Analysis, you will be able to see which metals were tested and the amount.
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What is the average particle size of Product 637254, Titanium(IV) oxide, anatase - nanopowder?
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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.
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What is the Department of Transportation shipping information for this product?
1 answer-
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
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