Hydrophilic graphene quantum dots as turn-off fluorescent nanoprobes for toxic heavy metal ions detection in aqueous media.

Chemosphere
T AnusuyaVivek Kumar

Abstract

Efforts are being made to develop fast, cost-effective and sensitive sensor to detect water contamination by toxic heavy metal ions. The oxygenated functional groups decorated graphene quantum dots (GQDs) effectively enhances the aqueous solubility and considered as a more desirable and simple sensing material with high sensitivity. Here, photoluminescence (PL) property of GQDs has been employed to devise an optical nanosensor for the detection of toxic heavy metal ions in aqueous media. Hydrothermal method was employed to synthesize highly fluorescent and water soluble GQDs. The fluorescence intensity reduces with the increase in toxic heavy metal ions concentration. The observed PL was analyzed by the Stern-Volmer equation to study the fluorescent quenching mechanism of the system. Nonlinear behavior of Stern-Volmer plot suggests that the reduction in the fluorescent intensity is due to the combination of dynamic and static processes. The fluorescence quenching results showed that, the as synthesized GQDs are an efficient fluorescent probe for heavy metal ions viz. Hg2+, Cd2+ and Pb2+ with the detection limit of 1.171 μM, 2.455 μM and 2.011 μM respectively. This study shows the viability of GQDs as promising material for sens...Continue Reading

References

Oct 17, 2002·Analytical Chemistry·Yongfen Chen, Zeev Rosenzweig
Jun 15, 2006·Analytical Chemistry·Nicolas H BingsJosé A C Broekaert
Jul 26, 2008·Chemical Reviews·Elizabeth M Nolan, Stephen J Lippard
Nov 18, 2009·The Analyst·Bruno B CamposJoaquim C G Esteves da Silva
Jan 1, 2008·Nano Research·Xiaoming SunHongjie Dai
Mar 14, 2012·Chemical Communications : Chem Comm·Jianhua ShenChunzhong Li
Jan 1, 2009·Sensors·Manuela F Frasco, Nikos Chaniotakis
Mar 23, 2013·The Analyst·Jingjing Li, Jun-Jie Zhu
Jun 27, 2013·Physical Chemistry Chemical Physics : PCCP·Xiang LiYan Lu
Jul 16, 2013·Journal of Biomedical Materials Research. Part a·Jing-Liang LiMin Gu
Aug 14, 2013·Chemistry : a European Journal·Hanjun SunXiaogang Qu
Apr 24, 2015·The Analyst·Ana P Ruas de SouzaCraig E Banks
Sep 1, 2015·ACS Applied Materials & Interfaces·Ruihua GuoNicolas H Voelcker
Jan 5, 2016·ACS Applied Materials & Interfaces·Fangwei ZhangJingyan Zhang
Nov 22, 2017·Scientific Reports·Mukesh Kumar KumawatRohit Srivastava
Dec 12, 2017·ACS Applied Materials & Interfaces·Akhilesh Babu GanganboinaRuey-An Doong
Oct 18, 2019·International Journal of Biological Macromolecules·K S VenkataprasannaG Devanand Venkatasubbu
Mar 17, 2020·International Journal of Biological Macromolecules·J PrakashG Devanand Venkatasubbu
May 21, 2016·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Fanping ShiXingguang Su
Feb 13, 2021·Materials·Bong Han LeeAnton V Naumov

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.