Reuse of waste Myrica rubra for green synthesis of nitrogen-doped carbon dots as an “on-off-on” fluorescent probe for Fe3+ and ascorbic acid detection

Fan, Ru; Xiang, Jianxing; Zhou, Peipei; Mei, He; Li, Yanyan; Wang, Huili; Liu, Xiaodong; Wang, Xuedong

doi:10.1016/j.ecoenv.2022.113350

Cited by 35 publications

(7 citation statements)

References 48 publications

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“…For Zn 2+ , Hg 2+ , and Fe 2+ ions at the same concentration, the fluorescence quenching is not more than 30%, and it is very weak for the other ions. The rapid electron transfer between Fe 3+ and oxygen- and nitrogen-rich groups on the surface of NCQDs may be the source of the strong fluorescence quenching effect of Fe 3+ . , Since electron-deficient Fe 3+ has a higher affinity for binding to electron-rich groups as compared to other bivalent cations, it binds with N-rich precursors on the surface of NCQDs which contain electron-donating groups like −NHR, −OH, −NH 2 , and −OR. The excited state of NCQDs would transfer electrons to the empty d-orbit of Fe 3+ to form a coordination bond, causing nonradiative electron/hole recombination and a strong fluorescence quenching .…”

Section: Resultsmentioning

confidence: 99%

Biomass-Derived Carbon Dots as Nanoprobes for Smartphone–Paper-Based Assay of Iron and Bioimaging Application

Korram,

Koyande,

Mehetre

et al. 2023

ACS Omega

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A facile one-step carbonization approach is reported herein for the sustainable hydrothermal synthesis of fluorescent blue nitrogen-doped carbon quantum dots (NCQDs) using banana petioles obtained as biomass waste. These NCQDs were used to design a "turnoff" fluorescent probe, which exhibited excellent sensing capability toward the selective detection of micronutrient, Fe 3+ ion, with a limit of detection (LOD) of 0.21 nM. The turnoff process involves the formation of a nonradiative charge transfer complex via a photoinduced electron transfer process. The sensor showed a linear range from 5 to 200 nM and was used for the estimation of Fe 3+ ions in real plant samples. Further, a paper-based assay was developed for the quantitative estimation of Fe 3+ with LOD values of 0.47 nM for solution-based assay and 0.94 nM for paper-based assay using a smartphone-based readout for potential on-field applications in precision agriculture. Bioimaging studies on banana leaf cells using NCQDs revealed the selective staining of stomata openings on leaf lamella. Therefore, this work provides a way for the valorization of biomass waste into functional nanomaterials without using any extra chemicals.

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Section: Resultsmentioning

confidence: 99%

Biomass-Derived Carbon Dots as Nanoprobes for Smartphone–Paper-Based Assay of Iron and Bioimaging Application

Korram,

Koyande,

Mehetre

et al. 2023

ACS Omega

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“…Comparing other reported Fe 3+ sensors 22–31 (Table 1), the Cu-1 probe shows high sensitivity for monitoring Fe 3+ and has many advantages such as lower cost, easier preparation steps, and simpler post-treatment.…”

Section: Resultsmentioning

confidence: 99%

An ultra-fast UV-electrochemical sensor based on Cu-MOF for highly sensitive and selective detection of ferric ions

Wei

et al. 2023

Analyst

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“…The fluorescence of N-CQDs was quenched when N-CQDs were mixed with Fe 3+ , and when L-ascorbic acid was present in the system, it acted as a reducing agent and interacted with Fe 3+ , which led to the detachment of Fe 3+ from N -CQDs to detach and fluorescence was restored. Ru Fan et al [75] also used the mechanism of redox reaction between ascorbic acid and Fe 3+ to prepare CQDs for the detection of ascorbic acid using waste cardamom. Zhang et al [76] prepared CQDs by hydrothermal method using black soybean as raw material, and the fluorescence of CQDs was quenched due to the electron transfer (ET) effect between CQDs and Ce 4+ .…”

Section: Fluorescent 'On-off'mentioning

confidence: 99%

Advances in carbon quantum dot technology for food safety: preparation, modification, applications and mechanisms

Sun,

Cheng,

et al. 2024

Nano Ex.

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Functionalized carbon quantum dots (CQDs) show great potential for application in the field of food safety by combining their use with other technologies. CQDs are good candidates in this regard due to the wide range of sources of raw materials for their synthesis, and their good biocompatibility and stable fluorescence. This paper analyses the properties of CQDs and compares them with those of conventional semiconductor quantum dots. It analyses the similarities and differences between hydrothermal carbonization, pyrolysis and microwave-assisted synthesis of CQDs, and reviews the principles and methods of functionalization of CQDs through surface modification and doping. Finally, it discusses the applications of functionalized CQDs in food safety, such as detection and sensing, bio-inhibition and photocatalytic degradation, and the mechanisms of detection.

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Reuse of waste Myrica rubra for green synthesis of nitrogen-doped carbon dots as an “on-off-on” fluorescent probe for Fe3+ and ascorbic acid detection

Cited by 35 publications

References 48 publications

Biomass-Derived Carbon Dots as Nanoprobes for Smartphone–Paper-Based Assay of Iron and Bioimaging Application

Biomass-Derived Carbon Dots as Nanoprobes for Smartphone–Paper-Based Assay of Iron and Bioimaging Application

An ultra-fast UV-electrochemical sensor based on Cu-MOF for highly sensitive and selective detection of ferric ions

Advances in carbon quantum dot technology for food safety: preparation, modification, applications and mechanisms

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