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

被引：17
|
作者：
Pal, A [1 ]
机构：
[1] Indian Inst Technol, Dept Civil Engn, Kharagpur 721302, W Bengal, India
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2001年 / 142卷 / 01期
关键词：
trihalomethane; gold nanoparticles; nucleophile;
D O I：
10.1016/S1010-6030(01)00465-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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 (CHBr3) chlorodibromomethane (CHClBr2), bromodichloromethane (CHCl2Br) owing to 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 dissolution 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 Science B.V. All rights reserved.
引用
收藏
页码：59 / 65
页数：7
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