Selective recognition of Fe3+ and Cr3+ in aqueous medium via fluorescence quenching of graphene quantum dots

被引：9

作者：

Raj, Savan K. ^{[1
]}

Rajput, Abhishek ^{[1
]}

Gupta, Hariom ^{[1
]}

Patidar, Rajesh ^{[1
]}

Kulshrestha, Vaibhav ^{[1
]}

机构：

[1] CSIR Cent Salt & Marine Chem Res Inst, GB Marg, Bhavnagar 364002, Gujarat, India

来源：

JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2019年 / 40卷 / 02期

关键词：

GQDs; Fluorescence; Iron ions; Chromium ions; LABEL-FREE; HG2+; CADMIUM;

D O I：

10.1080/01932691.2018.1467775

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：

Graphene quantum dots (GQDs) have been prepared from graphene oxide (GO) and characterized by standard analytical techniques. The size of the prepared GQDs ranges from 2-10nm. Aqueous dispersion of GQDs exhibited excitation-dependent emission behavior. Emission intensity of the aqueous dispersion found stable for the examined duration of about four months. GQDs exhibited selective recognition of Fe3+ and Cr3+ out of various common ions such as alkali, alkaline-earth and transition metal ions in aqueous medium through fluorescence quenching. The lower limit of detection of Fe3+ is 1 mu M and that of Cr3+ is 4 mu M. [GRAPHICS] .

引用

页码：250 / 255

页数：6

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