Brewery Spent Grain Derived Carbon Dots for Metal Sensing

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 Apr 28

PMID 35481069

Authors

Aurel Thibaut Nkeumaleu

Daniele Benetti

Imane Haddadou

Michael Di Mare

Claudiane M Ouellet-Plamondon

Federico Rosei

Affiliations

Soon will be listed here.

Abstract

This article presents a proof-of-concept to recycle microbrewery waste as a carbon source for synthesizing carbon dots (CDs). A simple method has been developed to synthesize water-soluble CDs based on microwave irradiation of brewery spent grain. The structures and optical properties of the CDs were characterized by ultraviolet-visible (UV-Vis) spectroscopy, photoluminescence spectroscopy (PL), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy. The effects of reaction time, temperature and pH on the properties of carbon dots were studied. These CDs were found to be spherical with an average diameter of 5.3 nm, N-doped, containing many functional groups (hydroxyl, ethers, esters, carboxyl and amino groups), and to exhibit good photoluminescence with a fluorescent quantum yield of 14%. Finally, the interaction between carbon dots and metal ions was investigated towards developing CDs as a sensing technology for water treatment, food quality and safety detection.

Citing Articles

Engineering of Green Carbon Dots for Biomedical and Biotechnological Applications.

Shang J, Zhou Q, Wang K, Wei Y Molecules. 2024; 29(18).

PMID: 39339503 PMC: 11434350. DOI: 10.3390/molecules29184508.

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