Amalgamation based optical and colorimetric sensing of mercury(II) ions with silver@graphene oxide nanocomposite materials

被引：111

作者：

Kamali, Khosro Zangeneh ^{[1
]}

Pandikumar, Alagarsamy ^{[1
]}

Jayabal, Subramaniam ^{[1
]}

Ramaraj, Ramasamy ^{[1
,2
]}

Lim, Hong Ngee ^{[3
]}

Ong, Boon Hoong ^{[4
]}

Bien, Chia Sheng Daniel ^{[5
]}

Kee, Yeh Yee ^{[6
]}

Huang, Nay Ming ^{[1
]}

机构：

[1] Univ Malaya, Fac Sci, Dept Phys, Low Dimens Mat Res Ctr, Kuala Lumpur 50603, Malaysia

[2] Madurai Kamaraj Univ, Sch Chem, Ctr Photoelectrochem, Madurai 625021, Tamil Nadu, India

[3] Univ Putra Malaysia, Dept Chem, Fac Sci, Upm Serdang 43400, Selangor, Malaysia

[4] Univ Malaya, Nanotechnol & Catalysis Res Ctr, Kuala Lumpur 50603, Malaysia

[5] NanoMalaysia Berhad, Hampshire Pl Off, Kuala Lumpur 50450, Malaysia

[6] MIMOS Berhad, Adv Analyt Lab, Kuala Lumpur 57000, Malaysia

来源：

MICROCHIMICA ACTA | 2016年 / 183卷 / 01期

关键词：

Silver nanoparticles; X-ray photoelectron spectroscopy; X-ray powder diffraction; Energy-dispersive X-ray spectroscopy; Localized surface plasmon resonance; CAPPED GOLD NANOPARTICLES; AQUEOUS-SOLUTION; HG2+; SENSOR; NANOROD; AGGREGATION; MORPHOLOGY; STRATEGY; PLATFORM; BLUE;

D O I：

10.1007/s00604-015-1658-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The article describes a facile method for the preparation of a conjugate composed of silver nanoparticles and graphene oxide (Ag@GO) via chemical reduction of silver precursors in the presence of graphene oxide (GO) while sonicating the solution. The Ag@GO was characterized by X-ray photoelectron spectroscopy, X-ray powder diffraction, and energy-dispersive X-ray spectroscopy. The nanocomposite undergoes a color change from yellow to colorless in presence of Hg(II), and this effect is based on the disappearance of the localized surface plasmon resonance absorption of the AgNPs due to the formation of silver-mercury amalgam. The presence of GO, on the other hand, prevents the agglomeration of the AgNPs and enhances the stability of the nanocomposite material in solution. Hence, the probe represents a viable optical probe for the determination of mercury(II) ions in that it can be used to visually detect Hg(II) concentrations as low as 100 mu M. The instrumental LOD is 338 nM.

引用

页码：369 / 377

页数：9

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