The zero point of charge of silica-alumina oxide suspensions

J. A. Schwarz; C. T. Driscoll; A. K. Bhanot

doi:10.1016/0021-9797(84)90274-1

The zero point of charge of silica-alumina oxide suspensions

J. A. Schwarz, C. T. Driscoll, A. K. Bhanot

Department of Civil & Environmental Engineering

Research output: Contribution to journal › Article › peer-review

226 Scopus citations

Abstract

The pH_zpc (pH at the zero point of charge) of a series of seven silica-alumina oxide supports, previously heat treated to 500°C, were determined by potentiometric titrations. Rigorous experimental procedures in support preparation and standardization have allowed us to compare the pH_zpc of each of the oxides with the weight fraction of the pure components. The pH_zpc of this homologous series varied linearly with the weight fraction of the pure components. These results are in direct agreement with a mass weighting model suggested by G. A. Parks (Advances in Chemical Series 67, ACS, Washington, D. C.) for calculating the pH_zpc for any composition of a mixed oxide system.

Original language	English (US)
Pages (from-to)	55-61
Number of pages	7
Journal	Journal of Colloid And Interface Science
Volume	97
Issue number	1
DOIs	https://doi.org/10.1016/0021-9797(84)90274-1
State	Published - Jan 1984

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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title = "The zero point of charge of silica-alumina oxide suspensions",

abstract = "The pHzpc (pH at the zero point of charge) of a series of seven silica-alumina oxide supports, previously heat treated to 500°C, were determined by potentiometric titrations. Rigorous experimental procedures in support preparation and standardization have allowed us to compare the pHzpc of each of the oxides with the weight fraction of the pure components. The pHzpc of this homologous series varied linearly with the weight fraction of the pure components. These results are in direct agreement with a mass weighting model suggested by G. A. Parks (Advances in Chemical Series 67, ACS, Washington, D. C.) for calculating the pHzpc for any composition of a mixed oxide system.",

author = "Schwarz, {J. A.} and Driscoll, {C. T.} and Bhanot, {A. K.}",

note = "Funding Information: Partial support of this research by NATO Grant NR 1898 is acknowledged.",

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T1 - The zero point of charge of silica-alumina oxide suspensions

AU - Schwarz, J. A.

AU - Driscoll, C. T.

AU - Bhanot, A. K.

N1 - Funding Information: Partial support of this research by NATO Grant NR 1898 is acknowledged.

PY - 1984/1

Y1 - 1984/1

N2 - The pHzpc (pH at the zero point of charge) of a series of seven silica-alumina oxide supports, previously heat treated to 500°C, were determined by potentiometric titrations. Rigorous experimental procedures in support preparation and standardization have allowed us to compare the pHzpc of each of the oxides with the weight fraction of the pure components. The pHzpc of this homologous series varied linearly with the weight fraction of the pure components. These results are in direct agreement with a mass weighting model suggested by G. A. Parks (Advances in Chemical Series 67, ACS, Washington, D. C.) for calculating the pHzpc for any composition of a mixed oxide system.

AB - The pHzpc (pH at the zero point of charge) of a series of seven silica-alumina oxide supports, previously heat treated to 500°C, were determined by potentiometric titrations. Rigorous experimental procedures in support preparation and standardization have allowed us to compare the pHzpc of each of the oxides with the weight fraction of the pure components. The pHzpc of this homologous series varied linearly with the weight fraction of the pure components. These results are in direct agreement with a mass weighting model suggested by G. A. Parks (Advances in Chemical Series 67, ACS, Washington, D. C.) for calculating the pHzpc for any composition of a mixed oxide system.

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The zero point of charge of silica-alumina oxide suspensions

Abstract

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