Mossbauer Spectroscopy Study of the Kinetics of Photoreduction of Fe3+ on CdS Semiconductor Powders

T. A. Gessert; D. L. Williamson; A. J. Nozik

doi:10.1021/j100368a044

Mossbauer Spectroscopy Study of the Kinetics of Photoreduction of Fe3+ on CdS Semiconductor Powders

T. A. Gessert, D. L. Williamson, A. J. Nozik

Chemistry and Nanoscience

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

1 Scopus Citations

Abstract

Photoreduction of Fe³⁺ to Fe²⁺ via illumination of CdS particles suspended in ferric chloride electrolyte has been monitored by ⁵⁷Fe Mössbauer spectroscopy. The conversion rate was studied as a function of the relative amounts of CdS and Fe³⁺ in the semiconductor powder-electrolyte slurry. Systematic variations in the rate constant with [CdS]/[Fe³⁺] are attributed to the optical density change associated with the 1-μm CdS particle size and to a high efficiency for photocorrosion of the CdS by the photogenerated holes. Surface reduction of Fe³⁺ to Fe²⁺ also occurs in the dark. One experiment was performed with a colloidal solution of 10-nm CdS particles, and very different behavior was observed compared to the powders.

Original language	American English
Pages (from-to)	1958-1962
Number of pages	5
Journal	Journal of Physical Chemistry
Volume	94
Issue number	5
DOIs	https://doi.org/10.1021/j100368a044 https://doi.org/10.1021/j100368a044
State	Published - 1990

NREL Publication Number

ACNR/JA-213-11038

Access to Document

Cite this

@article{f76ed9037eb7495f82716608c42fbdb0,

title = "Mossbauer Spectroscopy Study of the Kinetics of Photoreduction of Fe3+ on CdS Semiconductor Powders",

abstract = "Photoreduction of Fe3+ to Fe2+ via illumination of CdS particles suspended in ferric chloride electrolyte has been monitored by 57Fe M{\"o}ssbauer spectroscopy. The conversion rate was studied as a function of the relative amounts of CdS and Fe3+ in the semiconductor powder-electrolyte slurry. Systematic variations in the rate constant with [CdS]/[Fe3+] are attributed to the optical density change associated with the 1-μm CdS particle size and to a high efficiency for photocorrosion of the CdS by the photogenerated holes. Surface reduction of Fe3+ to Fe2+ also occurs in the dark. One experiment was performed with a colloidal solution of 10-nm CdS particles, and very different behavior was observed compared to the powders.",

author = "Gessert, {T. A.} and Williamson, {D. L.} and Nozik, {A. J.}",

year = "1990",

doi = "10.1021/j100368a044",

language = "American English",

volume = "94",

pages = "1958--1962",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

number = "5",

}

TY - JOUR

T1 - Mossbauer Spectroscopy Study of the Kinetics of Photoreduction of Fe3+ on CdS Semiconductor Powders

AU - Gessert, T. A.

AU - Williamson, D. L.

AU - Nozik, A. J.

PY - 1990

Y1 - 1990

N2 - Photoreduction of Fe3+ to Fe2+ via illumination of CdS particles suspended in ferric chloride electrolyte has been monitored by 57Fe Mössbauer spectroscopy. The conversion rate was studied as a function of the relative amounts of CdS and Fe3+ in the semiconductor powder-electrolyte slurry. Systematic variations in the rate constant with [CdS]/[Fe3+] are attributed to the optical density change associated with the 1-μm CdS particle size and to a high efficiency for photocorrosion of the CdS by the photogenerated holes. Surface reduction of Fe3+ to Fe2+ also occurs in the dark. One experiment was performed with a colloidal solution of 10-nm CdS particles, and very different behavior was observed compared to the powders.

AB - Photoreduction of Fe3+ to Fe2+ via illumination of CdS particles suspended in ferric chloride electrolyte has been monitored by 57Fe Mössbauer spectroscopy. The conversion rate was studied as a function of the relative amounts of CdS and Fe3+ in the semiconductor powder-electrolyte slurry. Systematic variations in the rate constant with [CdS]/[Fe3+] are attributed to the optical density change associated with the 1-μm CdS particle size and to a high efficiency for photocorrosion of the CdS by the photogenerated holes. Surface reduction of Fe3+ to Fe2+ also occurs in the dark. One experiment was performed with a colloidal solution of 10-nm CdS particles, and very different behavior was observed compared to the powders.

UR - http://www.scopus.com/inward/record.url?scp=14644420474&partnerID=8YFLogxK

U2 - 10.1021/j100368a044

DO - 10.1021/j100368a044

M3 - Article

AN - SCOPUS:14644420474

SN - 0022-3654

VL - 94

SP - 1958

EP - 1962

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 5

ER -

Mossbauer Spectroscopy Study of the Kinetics of Photoreduction of Fe3+ on CdS Semiconductor Powders

Abstract

NREL Publication Number

Access to Document

Other files and links

Fingerprint

Cite this