Simple bare gold nanoparticles for rapid colorimetric detection of Cr3+ ions in aqueous medium with real sample applications

被引：68
作者：
Shellaiah, Muthaiah [1 ]
Simon, Turibius [2 ]
Sun, Kien Wen [1 ,3 ]
Ko, Fu-Hsiang [2 ]
机构：
[1] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 300, Taiwan
[2] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan
[3] Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu 300, Taiwan
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2016年 / 226卷
关键词：
Bare gold nanoparticles; Cr3+; Colorimetric sensor; Real sample analysis; CLOUD POINT EXTRACTION; SELECTIVE DETECTION; TOTAL CHROMIUM; WATER SAMPLES; METAL-IONS; CR(III); SENSOR; CR(VI); PROBE; SPECIATION;
D O I：
10.1016/j.snb.2015.11.123
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Facile bare gold nanoparticles (AuNPs) were synthesized via borohydride reduction method and evidenced the colorimetric sensor selectivity to Cr3+ ions among Na+, Ni2+, Fe3+, Cd2+, Cr3+, Cu2+, Ca2+, Mg2+, Ga3+, Fe2+, Ba2+, Al3+ Ag+, Co2+, Zn2+, Pb2+, Mn2+ and Hg2+ ions. The color of bare AuNPs changed rapidly from red to blue via Cr3+ induced aggregation. These Cr3+-induced aggregation of bare AuNPs were monitored by naked eye and using UV-vis spectroscopy. The SPR absorbance (654 nm) of the reaction between bare AuNPs and Cr3+ showed a good linearity with a low detection limit of 13.42 nM. The optimal detection of Cr3+ was achieved between pH ranges from 5 to 11 and its reversibility was well established with EDTA. In addition, the bare AuNPs which were successfully applied for the detection of Cr3+ in tap and lake water displays low interference. (C) 2015 Elsevier B.V. All rights reserved.
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收藏
页码：44 / 51
页数：8
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