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Carbon quantum dots functionalized agarose gel matrix for in solution detection of nonylphenol.

Authors
  • Singh, Sanju1
  • Nigam, Preeti2
  • Pednekar, Aisha1
  • Mukherjee, Souvik1
  • Mishra, Abhishek1
  • 1 Department of Biotechnology, Goa University, Taleigao Plateau, Goa 403206, India. , (India)
  • 2 Combi Chem Bioresource Centre, Organic Chemistry Division, CSIR- National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India. , (India)
Type
Published Article
Journal
Environmental Technology
Publisher
Informa UK (Taylor & Francis)
Publication Date
Jan 01, 2020
Volume
41
Issue
3
Pages
322–328
Identifiers
DOI: 10.1080/09593330.2018.1498133
PMID: 29978766
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Nonylphenol, an endocrine disrupter, is widely released to the aquatic environment, which is accumulative and extremely toxic to aquatic organisms. Here, we report a simple and cost-effective large-scale green synthesis of water-soluble highly fluorescent carbon quantum dots (CQDs) from marine biowaste (offshore washed algae) which gets quenched strongly in the presence of nonylphenol. These CQDs were around 20-40 nm in size and exhibit fluorescence constantly at 360 nm. The XRD profile depicted the interlayer spacing in the particle as 0.284 nm with a humped peak around 14 degrees showing the amorphous nature of the CQDs. FTIR spectra showed the stretching vibration of the hydroxyl groups (OH), asymmetric and symmetric stretching vibrations of the carboxylate anions (COO-). The fluorescence quantum yield of the CQDs is up to 68% and nonyl phenol detection limit is less than 0.1 µM. Furthermore, the CQDs were found to be stable at a wide pH range which makes it a suitable nonylphenol sensor for a variety of environmental samples. We functionalized these CQDs on an agarose gel matrix to develop a convenient sensor for the rapid detection of nonylphenol.

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