Home > Research > Publications & Outputs > Photoelectrophoresis of colloidal semiconductor...

Research

Links

Text available via DOI:

Keywords

View graph of relations

Photoelectrophoresis of colloidal semiconductors. Part 1.—The technique and its applications

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Published

Standard

Photoelectrophoresis of colloidal semiconductors. Part 1.—The technique and its applications. / BOXALL, C ; KELSALL, G H .
In: Journal of the Chemical Society, Faraday Transactions, Vol. 87, No. 21, 07.11.1991, p. 3537-3545.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

BOXALL, C & KELSALL, GH 1991, 'Photoelectrophoresis of colloidal semiconductors. Part 1.—The technique and its applications', Journal of the Chemical Society, Faraday Transactions, vol. 87, no. 21, pp. 3537-3545. https://doi.org/10.1039/FT9918703537

APA

BOXALL, C., & KELSALL, G. H. (1991). Photoelectrophoresis of colloidal semiconductors. Part 1.—The technique and its applications. Journal of the Chemical Society, Faraday Transactions, 87(21), 3537-3545. https://doi.org/10.1039/FT9918703537

Vancouver

BOXALL C, KELSALL GH. Photoelectrophoresis of colloidal semiconductors. Part 1.—The technique and its applications. Journal of the Chemical Society, Faraday Transactions. 1991 Nov 7;87(21):3537-3545. doi: 10.1039/FT9918703537

Author

BOXALL, C ; KELSALL, G H . / Photoelectrophoresis of colloidal semiconductors. Part 1.—The technique and its applications. In: Journal of the Chemical Society, Faraday Transactions. 1991 ; Vol. 87, No. 21. pp. 3537-3545.

Bibtex

@article{260931495caa4199a09e7f161ab30aa0,
title = "Photoelectrophoresis of colloidal semiconductors. Part 1.—The technique and its applications",
abstract = "A Malvern Zetasizer IIc laser Doppler electrophoresis apparatus has been modified to enable the effect of illumination on electrophoretic mobilities of aqueous dispersions of semiconductor particles to be studied. The electrophoretic mobilities of TiO2 particles were determined in the dark and whilst exposed to monochromatic light, the wavelength of which was varied between experiments. The results showed that a positive charge accumulated on the particles in the absence of easily reducible or oxidizable species in solution. This effect was observed only when the particles were illuminated with photons of ultra-band gap energy, demonstrating unambiguously that it was related to the generation of electron-hole pairs and their subsequent reactions with Ti-O surface groups. Similar shifts were observed for suspensions of SnO2, Ti4O7 and Fe(CN)64- photosensitized TiO2 particles. No such shift was observed for CdS particles in the absence of any excess lattice ions, probably owing to decomposition of the particles to generate a surface layer of photo-inactive sulphur.",
keywords = "SOLAR-ENERGY CONVERSION, METAL SULFIDES, TIO2, CDS, PHOTOELECTROCHEMISTRY, PHOTOCHEMISTRY, OXIDATION, PARTICLES, EMISSION, SYSTEMS",
author = "C BOXALL and KELSALL, {G H}",
year = "1991",
month = nov,
day = "7",
doi = "10.1039/FT9918703537",
language = "English",
volume = "87",
pages = "3537--3545",
journal = "Journal of the Chemical Society, Faraday Transactions",
issn = "0956-5000",
publisher = "Royal Society of Chemistry",
number = "21",

}

RIS

TY - JOUR

T1 - Photoelectrophoresis of colloidal semiconductors. Part 1.—The technique and its applications

AU - BOXALL, C

AU - KELSALL, G H

PY - 1991/11/7

Y1 - 1991/11/7

N2 - A Malvern Zetasizer IIc laser Doppler electrophoresis apparatus has been modified to enable the effect of illumination on electrophoretic mobilities of aqueous dispersions of semiconductor particles to be studied. The electrophoretic mobilities of TiO2 particles were determined in the dark and whilst exposed to monochromatic light, the wavelength of which was varied between experiments. The results showed that a positive charge accumulated on the particles in the absence of easily reducible or oxidizable species in solution. This effect was observed only when the particles were illuminated with photons of ultra-band gap energy, demonstrating unambiguously that it was related to the generation of electron-hole pairs and their subsequent reactions with Ti-O surface groups. Similar shifts were observed for suspensions of SnO2, Ti4O7 and Fe(CN)64- photosensitized TiO2 particles. No such shift was observed for CdS particles in the absence of any excess lattice ions, probably owing to decomposition of the particles to generate a surface layer of photo-inactive sulphur.

AB - A Malvern Zetasizer IIc laser Doppler electrophoresis apparatus has been modified to enable the effect of illumination on electrophoretic mobilities of aqueous dispersions of semiconductor particles to be studied. The electrophoretic mobilities of TiO2 particles were determined in the dark and whilst exposed to monochromatic light, the wavelength of which was varied between experiments. The results showed that a positive charge accumulated on the particles in the absence of easily reducible or oxidizable species in solution. This effect was observed only when the particles were illuminated with photons of ultra-band gap energy, demonstrating unambiguously that it was related to the generation of electron-hole pairs and their subsequent reactions with Ti-O surface groups. Similar shifts were observed for suspensions of SnO2, Ti4O7 and Fe(CN)64- photosensitized TiO2 particles. No such shift was observed for CdS particles in the absence of any excess lattice ions, probably owing to decomposition of the particles to generate a surface layer of photo-inactive sulphur.

KW - SOLAR-ENERGY CONVERSION

KW - METAL SULFIDES

KW - TIO2

KW - CDS

KW - PHOTOELECTROCHEMISTRY

KW - PHOTOCHEMISTRY

KW - OXIDATION

KW - PARTICLES

KW - EMISSION

KW - SYSTEMS

U2 - 10.1039/FT9918703537

DO - 10.1039/FT9918703537

M3 - Journal article

VL - 87

SP - 3537

EP - 3545

JO - Journal of the Chemical Society, Faraday Transactions

JF - Journal of the Chemical Society, Faraday Transactions

SN - 0956-5000

IS - 21

ER -