Synthesis, isolation, and chemical reactivity studies of nanocrystalline zinc oxide

Journal Article · Tue Apr 18 04:00:00 EDT 2000 · Langmuir

DOI:https://doi.org/10.1021/la991498p· OSTI ID:20075529

Carnes, C L; Klabunde, K J

Nanocrystals of ZnO have been produced by an alkoxide based synthesis involving diethylzinc, tert-butyl alcohol, ethanol, and water. The resulting ZnO is in the form of a powder made up of zincite crystallites in the size range of 3--5 nm. These crystallites aggregate together to form larger spherical particles. These spherical particles have been studied by transmission electron microscopy (TEM) and Brunauer-Emmet-Teller (BET) methods and were found to contain many pores and tunnels. It is because of this that an uncharacteristically high surface area is found, averaging about 120 m{sup 2}/g. As seen with other metal oxides, once they are made as nanoparticles, their reactivity is greatly enhanced. This is thought to be due to morphological differences, whereas larger crystallites have only a small percentage of reactive sites on the surface, smaller crystallites will possess much higher surface concentration of such sites. Elemental analysis, X-ray diffraction, and infrared spectroscopy have been used to characterize this nanoparticle ZnO, and reactions with CCl{sub 4}, SO{sub 2}, and paraoxon have demonstrated significantly enhanced reactivity and/or capacity compared with common forms of ZnO powders.

• Research Organization: Kansas State Univ., Manhattan, KS (US)
• OSTI ID: 20075529
• Journal Information: Langmuir, Journal Name: Langmuir Journal Issue: 8 Vol. 16; ISSN LANGD5; ISSN 0743-7463
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CRYSTALS
MINIATURIZATION
SEMICONDUCTOR DEVICES
ZINC OXIDES