One-pot green synthesis of nitrogen-doped carbon nanoparticles as fluorescent probes for mercury ions

Abstract

Herein, a simple, green, and low-cost way was developed in the synthesis of fluorescent nitrogen-doped carbon nanoparticles (FNCPs) with nitrogen content of 6.88%, using one-pot hydrothermal treatment of strawberry juice. The as-prepared FNCPs exhibited a maximum emission at 427 nm with a quantum yield of 6.3%, which could be specifically quenched by Hg 2+ . This phenomenon was used to develop a fluorescent method for facile detection of Hg 2+ with a linear range from 10 nM to 50 µM and a detection limit of 3 nM (S/N = 3), and further extended to measure environmental water samples with satisfactory recovery. This study provides a green strategy in the synthesis of FNCPs to detect Hg 2+ with good performance.Fluorescent nitrogen-doped carbon nanoparticles (FNCPs) were synthesized by one-pot hydrothermal treatment of strawberry juice. The strategy was simple, green, and low-cost. The as-prepared FNCPs showed some excellent properties such as water-soluble and good stability, which was applied as an Hg 2+ sensor with high sensitivity and selectivity.

From highly graphitic to amorphous carbon dots: A critical review

“…47 The N-doped gC-dots derived electrolytically from graphite using tetrabutylammonium perchlorate in acetonitrile as the electrolyte 63 exhibit signifi cant electrocatalytic activity against the oxygen reduction reaction (ORR). The PL signal of gC-dots with 7% N content derived hydrothermally by strawberry juice 38 is quenched in the presence of Hg(II). Nitrogen and sulfur co-doped C-dots (N,S-C-dots) (with total heteroatom content up to 10%) are realized via sulfuric acid carbonization of hair fi bers 64 or hydrothermal treatment of a mixture of citric acid and L-cysteine produce 65 (in which case C-dots exhibit an intriguing excitation-independent emission), or citric acid and thiourea.…”

“…Within this general synthetic scheme, carbohydrates, 32 , 33 grass, 34 gelatine, 35 orange juice, 36 soy milk, 37 strawberry juice, 38 bovine albumin, 39 and polyacrylamide 40 are hydrothermally converted to aC-dots. Similarly, hollow 41 and silica-supported 42 aC-dots are prepared by hydrothermal carbonization protocols, while aC-dots are derived by direct pyrolysis of coffee grounds 43 or grass, 44 plasma-induced pyrolysis of eggs, 45 barbeque char, 46 and the plant soot.…”

Carbon Quantum Dots as Potential Drug Carriers

“…Strategie te zazwyczaj klasyfikują się do metod bottom-up, a jedną z najważniej-szych technik, którą należy tu wymienić, jest karbonizacja w warunkach hydrotermalnych. Można w ten sposób otrzymać fluorescencyjne CQD z praktycznie dowolnej biomasy, takiej jak: węglowodany [20,34], trawa [35], żelatyna [36], soki owocowe [37,38], mleko sojowe [39], albumina wołowa [40] (tab. 2).…”

One-step Synthesis of Highly Luminescent Nitrogen-doped Carbon Dots for Selective and Sensitive Detection of Mercury(II) Ions and Cellular Imaging

“…The better selectivity of N-CDs for Hg 2+ could be due to the stronger binding affinity with carboxylic, hydroxyl and amino groups on the surface of N-CDs. 29 In addition, in order to further enlarge the application of N-CDs to biosystems, several representative amino acids were also investigated as potential interferences. As shown in Fig.…”

“…Huang et al prepared the nitrogen-contained carbon nanoparticles with strawberry juice, which can sensitively and selectively detected Hg 2+ , but the QY was still low (QY = 6.3%). 29 Here, we report a straightforward and low-cost synthetic onestep route to prepare a kind of N-CDs with QY as high as 40.5% by using citric acid monohydrated as carbon resource and ammonia as nitrogen resource via hydrothermal treatment. Moreover, the fluorescence intensity of the obtained N-CDs could be effectively quenched by Hg 2+ and not affected by other In this paper, nitrogen-doped carbon dots (N-CDs) with high quantum yield (QY) of 40.5% were prepared through a facile and straightforward hydrothermal route.…”