Photochemical dissolution of gold nanoparticles by bromine containing trihalomethanes (THMs) in an aqueous triton X-100 medium and its analytical application

Authors
Pal, A
Citation
A. Pal, Photochemical dissolution of gold nanoparticles by bromine containing trihalomethanes (THMs) in an aqueous triton X-100 medium and its analytical application, J PHOTOCH A, 142(1), 2001, pp. 59-65
Citations number
17
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
ISSN journal
10106030 → ACNP
Volume
142
Issue
1
Year of publication
2001
Pages
59 - 65
Database
ISI
SICI code
1010-6030(20010820)142:1<59:PDOGNB>2.0.ZU;2-S
Abstract
Gold sol, photo chemically prepared in aqueous Triton X-100 (TX-100) medium is discolored by photo irradiation in presence of KBrO3 and any one of the following bromine containing trihalomethanes (THMs), such as bromoform (CH Br3) chlorodibromomethane (CHClBr2), bromodichloromethane (CHCl2Br) owing t o the dissolution of colloidal gold nanoparticles. Upon dissolution of gold , HAuBr4 is formed whose absorption maximum is at 400 am. The absorbance at this wavelength gives a measure of the concentration of THM. The dissoluti on of gold nanoparticles can also be monitored at the plasmon absorption of gold viz. 523 nm to relate the concentration of THM. (C) 2001 Elsevier Sci ence B.V. All rights reserved.