A flow microcalorimetric investigation of the acidity of chromium dioxide and γ-iron oxide

G. F. Hudson; S. Raghavan

doi:10.1016/0166-6622(88)80122-7

A flow microcalorimetric investigation of the acidity of chromium dioxide and γ-iron oxide

G. F. Hudson, S. Raghavan

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

7 Scopus citations

Abstract

Investigations have been carried out to compare the acidity of surface sites on chromium dioxide and γ-iron oxide magnetic particles. Measured heats of adsorption and adsorption densities of pyridine show that surface sites on CrO₂, are more heterogeneous and more acidic than surface sites on γ-Fe₂O₃. Experimental results indicate that monolayer coverage of pyridine, approximately 5.0 μmol m^-2, is attained on CrO₂ at a solution concentration of approximately 35 mM. Application of the Freundlich isotherm to experimental results is discussed.

Original language	English (US)
Pages (from-to)	263-272
Number of pages	10
Journal	Colloids and Surfaces
Volume	29
Issue number	3
DOIs	https://doi.org/10.1016/0166-6622(88)80122-7
State	Published - 1988
Externally published	Yes

ASJC Scopus subject areas

General Engineering

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10.1016/0166-6622(88)80122-7

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title = "A flow microcalorimetric investigation of the acidity of chromium dioxide and γ-iron oxide",

abstract = "Investigations have been carried out to compare the acidity of surface sites on chromium dioxide and γ-iron oxide magnetic particles. Measured heats of adsorption and adsorption densities of pyridine show that surface sites on CrO2, are more heterogeneous and more acidic than surface sites on γ-Fe2O3. Experimental results indicate that monolayer coverage of pyridine, approximately 5.0 μmol m-2, is attained on CrO2 at a solution concentration of approximately 35 mM. Application of the Freundlich isotherm to experimental results is discussed.",

author = "Hudson, {G. F.} and S. Raghavan",

year = "1988",

doi = "10.1016/0166-6622(88)80122-7",

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T1 - A flow microcalorimetric investigation of the acidity of chromium dioxide and γ-iron oxide

AU - Hudson, G. F.

AU - Raghavan, S.

PY - 1988

Y1 - 1988

N2 - Investigations have been carried out to compare the acidity of surface sites on chromium dioxide and γ-iron oxide magnetic particles. Measured heats of adsorption and adsorption densities of pyridine show that surface sites on CrO2, are more heterogeneous and more acidic than surface sites on γ-Fe2O3. Experimental results indicate that monolayer coverage of pyridine, approximately 5.0 μmol m-2, is attained on CrO2 at a solution concentration of approximately 35 mM. Application of the Freundlich isotherm to experimental results is discussed.

AB - Investigations have been carried out to compare the acidity of surface sites on chromium dioxide and γ-iron oxide magnetic particles. Measured heats of adsorption and adsorption densities of pyridine show that surface sites on CrO2, are more heterogeneous and more acidic than surface sites on γ-Fe2O3. Experimental results indicate that monolayer coverage of pyridine, approximately 5.0 μmol m-2, is attained on CrO2 at a solution concentration of approximately 35 mM. Application of the Freundlich isotherm to experimental results is discussed.

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U2 - 10.1016/0166-6622(88)80122-7

DO - 10.1016/0166-6622(88)80122-7

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JO - Colloids and Surfaces

JF - Colloids and Surfaces

IS - 3

ER -

A flow microcalorimetric investigation of the acidity of chromium dioxide and γ-iron oxide

Abstract

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