Details
| Original language | English |
|---|---|
| Pages (from-to) | 4656-4657 |
| Number of pages | 2 |
| Journal | Journal of Physical Chemistry |
| Volume | 86 |
| Issue number | 24 |
| Publication status | Published - 1982 |
| Externally published | Yes |
Abstract
Hydrated electrons are formed in the illumination of a CdS colloid and of ZnS/CdS co-colloids with a 347.2-nm laser flash. The yield is increased by excess sulfide anions. In the presence of 2 × 10-3 M Na2S, the quantum yield is 0.15 hydrated electrons per absorbed photon. The photoelectron emission from the colloids shows the intensity dependence of a monophotonic process. A mechanism is proposed in which the storage of a huge number of electrons for a short time after scavenging of positive holes by sulfide anions plays an important role. The accompanying cathodic potential changes enable part of the electrons to migrate from the colloidal particles into the aqueous phase.
ASJC Scopus subject areas
- Engineering(all)
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Journal of Physical Chemistry, Vol. 86, No. 24, 1982, p. 4656-4657.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Photochemistry of colloidal metal sulfides. 3. Photoelectron emission from CdS and CdS-ZnS co-colloids
AU - Alfassi, Z.
AU - Bahnemann, D.
AU - Henglein, A.
N1 - Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 1982
Y1 - 1982
N2 - Hydrated electrons are formed in the illumination of a CdS colloid and of ZnS/CdS co-colloids with a 347.2-nm laser flash. The yield is increased by excess sulfide anions. In the presence of 2 × 10-3 M Na2S, the quantum yield is 0.15 hydrated electrons per absorbed photon. The photoelectron emission from the colloids shows the intensity dependence of a monophotonic process. A mechanism is proposed in which the storage of a huge number of electrons for a short time after scavenging of positive holes by sulfide anions plays an important role. The accompanying cathodic potential changes enable part of the electrons to migrate from the colloidal particles into the aqueous phase.
AB - Hydrated electrons are formed in the illumination of a CdS colloid and of ZnS/CdS co-colloids with a 347.2-nm laser flash. The yield is increased by excess sulfide anions. In the presence of 2 × 10-3 M Na2S, the quantum yield is 0.15 hydrated electrons per absorbed photon. The photoelectron emission from the colloids shows the intensity dependence of a monophotonic process. A mechanism is proposed in which the storage of a huge number of electrons for a short time after scavenging of positive holes by sulfide anions plays an important role. The accompanying cathodic potential changes enable part of the electrons to migrate from the colloidal particles into the aqueous phase.
UR - http://www.scopus.com/inward/record.url?scp=0000419389&partnerID=8YFLogxK
U2 - 10.1021/j100221a002
DO - 10.1021/j100221a002
M3 - Article
AN - SCOPUS:0000419389
VL - 86
SP - 4656
EP - 4657
JO - Journal of Physical Chemistry
JF - Journal of Physical Chemistry
SN - 0022-3654
IS - 24
ER -