Aluminum Polyphosphate Nanoparticles: Preparation, Particle Size Determination, and Microchemistry

doi:10.1006/jcis.1999.6381

Journal of Colloid and Interface Science

Volume 217, Issue 2, 15 September 1999, Pages 237-248

https://doi.org/10.1006/jcis.1999.6381 Get rights and content

Abstract

Admixture of aluminum nitrate, sodium polyphosphate, and ammonium hydroxide solutions yields stable dispersions of hydrated aluminum polyphosphate particles within a broad reagent concentration range. These particles are formed by liquid–liquid phase separation, for which a phase diagram was calculated using suitable models for concentrated electrolyte solutions. Particle effective diameters range from a few nanometers to many hundreds and are fractionated by centrifugation. Particle electrophoretic mobility is very low and the hydration degree is high (∼80% v/v). Dry nanoparticles (1- to 15-nm diameter as observed by TEM) as well as particle aggregates are obtained by lyophilization. Element (P, Al, and Na) mapping by ESI-TEM shows that particle aggregates have a core-and-shell morphology, with a higher content of P in the aggregate core and a higher Na content at the outer shell.

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Regular ArticleAluminum Polyphosphate Nanoparticles: Preparation, Particle Size Determination, and Microchemistry

Abstract

The Environmental Chemistry of Aluminum

J. Colloid Interface Sci.

J. Magn. Reson.

Soil Soc. Am. J.

J. Water Res.

J. Phys. Chem.

Environ. Sci. Technol.

J. Am. Water Works Assoc.

Water Res.

Langmuir

Chem. Mater.

ACS Symp. Ser.

J. Polym. Sci., Polym. Chem. Ed.

Langmuir

Metal Clusters in Catalysis

J. Appl. Phys.

Phys. Rev. B

Int. J. Pharm.

Int. J. Pharm.

Science

Mater. Sci. Eng., A

Mater. Sci. Eng., A

J. Mater. Sci.

Mater. Sci. Eng., A

Mater. Sci. Eng., A

Polymer

Regular Article
Aluminum Polyphosphate Nanoparticles: Preparation, Particle Size Determination, and Microchemistry