L-cysteine functionalized graphene quantum dots for sub-ppb detection of As (III)

Naseh Md Farhan; Singh Neelam; Ansari Jamilur R.Kumar AshavaniSarkar TapanDatta Anindya

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L-cysteine functionalized graphene quantum dots for sub-ppb detection of As (III)

机译：L-cysteine functionalized graphene quantum dots for sub-ppb detection of As (III)

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Here, we report functionalized graphene quantum dots (GQDs) for the optical detection of arsenic at room temperature. GQDs with the fluorescence of three fundamental colors (red, green, and blue) were synthesized and functionally capped with L-cysteine (L-cys) to impart selectively towards As (III) by exploiting the affinity of L-cys towards arsenite. The optical characterization of GQDs was carried out using UV-vis absorption spectroscopy, Fourier transform infrared spectroscopy, and fluorescence spectrometry, and the structural characterizations were performed using transmission electron microscopy. The fluorescence results showed instantaneous quenching in intensity when the GQDs came in contact with As (III) for all test concentrations over a range from 0.025 to 25 ppb, which covers the permissible limit of arsenic in drinking water. The experimental results suggested excellent sensitivity and selectivity towards As (III).

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来源
《Nanotechnology》 |2022年第6期|共10页
作者
Naseh Md Farhan; Singh Neelam; Ansari Jamilur R.Kumar AshavaniSarkar TapanDatta Anindya;
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作者单位

Guru Gobind Singh Indraprastha Univ;

Natl Inst Technol;

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正文语种英语
中图分类特种结构材料;
关键词
graphene quantum dots; L-cysteine; arsenic; photoluminescence; HYDRIDE GENERATION; CARBON DOTS; WATER; GREEN; BLUE; PHOTOLUMINESCENCE; CHROMATOGRAPHY; ARSENIC(III); GLUTATHIONE; SPECIATION;

L-cysteine functionalized graphene quantum dots for sub-ppb detection of As (III)

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