Neues Tio2-Referenzmaterial für Nano-Forschung publiziert
Nanoskaliges Titan-Dioxid gehört weltweit zu den meist produzierten und verwendeten Nanomaterialien. Es ist auch das am besten untersuchte. Das US-amerikanische National Institute of Standards and Technology (NIST) hat nun ein neues Nano-Referenzmaterial für den Einsatz in Umwelt-, Gesundheits- und Sicherheitsstudien herausgegeben. Dabei handelt es sich um ein Muster eines kommerziellen Titan-Dioxid-Pulvers, das als "P25" bekannt ist.
The National Institute of Standards and Technology (NIST) has issued a new nanoscale reference material for use in a wide range of environmental, health and safety studies of industrial nanomaterials. The new NIST reference material is a sample of commercial titanium dioxide powder commonly known as “P25” NIST Standard Reference Materials® (SRMs) are typically samples of industrially or clinically important materials that have been carefully analyzed by NIST. They are provided with certified values for certain key properties so that they can be used in experiments as a known reference point.
Nanoscale titanium-dioxide powder may well be the most widely manufactured and used nanomaterial in the world, and not coincidentally, it is also one of the most widely studied. In the form of larger particles, titanium dioxide is a common white pigment. As nanoscale particles, the material is widely used as a photocatalyst, a sterilizing agent and an ultraviolet blocker.
The new titanium-dioxide reference material is a mixed phase, nanocrystalline form of the chemical in a dry powder. To assist in its proper use, NIST also has developed protocols for properly preparing samples for environmental or toxicological studies. The new SRM also is particularly well suited for use in calibrating and testing analytical instruments that measure specific surface area of nanomaterials by the widely used Brunauer-Emmet-Teller (BET) gas sorption method.
Additional information on NIST Standard Reference Material 1898, “Titanium Dioxide Nanomaterial” can be retrieved by visiting the NIST Website.
Quelle: Nanowerk
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