A highly selective and sensitive “on–off” fluorescent probe for detecting cadmium ions and <scp>l</scp>-cysteine based on nitrogen and boron co-doped carbon quantum dots

Yan, Zhihong; Yao, Wei; Mai, Kang; Huang, Jia‐Qi; Wan, Yating; Liu, Huang; Cai, Bo; Liu, Yi

doi:10.1039/d1ra08219a

Cited by 23 publications

(3 citation statements)

References 48 publications

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“…Figure 3(b,c) shows that in the wavelength range from 250 to 470 nm, the N‐CDs exhibited excitation wavelength dependence, which could be attributed to different emissive traps on the N‐CD surface. [ 32 ] The colour coordinates of the maximum excitation and emission wavelengths were (0.15, 0.12) (Figure 3d). Furthermore, the QY of the N‐CDs was 3.84%.…”

Section: Resultsmentioning

confidence: 99%

The synthesis of N‐doped carbon dots for visual differentiating and detection of tetracyclines

et al. 2023

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N-doped carbon dots (N-CDs) were synthesized from L-glutamine and triethanolamine using a one-step hydrothermal method. The N-CDs emitting blue fluorescence had selective responses to tetracyclines (TCs) and could be used as a fluorescent probe to realize the quantitative detection and qualitative analysis of TCs. A method for the determination of TCs using the N-CDs in actual samples was successfully established. The recovery rate was maintained at 97.50-105.60%, and the relative standard deviation (RSD) was less than 3%. In addition, TCs can be visually distinguished using filter paper by the different fluorescence colours (light green, dark blue, and yellow-green) of the N-CDs/TCs system under ultraviolet light. This study provides a relatively simple method to detect and identify TCs.fluorescent probe, N-doped carbon dots, tetracyclines | INTRODUCTIONTetracyclines (TCs), mainly including tetracycline (TC), chlortetracycline (CTC), and oxytetracycline (OTC), are commonly used as a disease-preventive medicine and feed additive in animal husbandry and aquaculture. [1,2] However, the long-term abuse of TCs has caused extensive drug residues in the environment that may endanger human health. Many studies have shown that the excessive intake of TCs can

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Section: Resultsmentioning

confidence: 99%

The synthesis of N‐doped carbon dots for visual differentiating and detection of tetracyclines

et al. 2023

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“…Yan et al [149] reported a rapid and sensitive "turn-on" fluorescence sensor for detecting Cd 2+ based on N, B-doped CQDs, which may be ascribed to the formation of an N, B-CQDs/Cd 2+ complex, resulting in reduced internal charge transfer (ICT) and improved photo-generated electron transfer. Based on a similar co-doping system introduced for detection of Cr 6+ by Luo's group [150].…”

Section: Other Metal Ionsmentioning

confidence: 99%

Fluorescent Quantum Dots and Its Composites for Highly Sensitive Detection of Heavy Metal Ions and Pesticide Residues: A Review

et al. 2023

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Quantum dots nanomaterials have attracted extensive interest for fluorescence chemical sensors due their attributes, such as excellent optical characteristics, quantum size effects, interface effects, etc. Moreover, the fluorescence properties of quantum dots can be adjusted by changing their structure, size, morphology, composition, doping, and surface modification. In recent years, quantum dots nanomaterials have been considered the preferred sensing materials for the detection of heavy metal ions and pesticide residues by the interactions between quantum dots and various analytes, showing excellent sensitivity, selectivity, and interference, as well as reducing the cost of equipment compared with traditional measurement methods. In this review, the applications and sensing mechanisms of semiconductor quantum dots and carbon-based quantum dots are comprehensively discussed. The application of semiconductor quantum dots, carbon quantum dots, graphene quantum dots, and their nanocomposites that are utilized as fluorescence sensors are discussed in detailed, and the properties of various quantum dots for heavy metal ion and pesticide residue determination are also presented. The recent advances in and application perspectives regarding quantum dots and their composites are also summarized.

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“…1,2 Reportedly, abnormal levels of L-cysteine can assist in diagnosing various diseases such as hypogenesis, skin lesions, hepatic injury, decreased hematopoiesis, AIDS, Alzheimer's disease, Parkinson's, etc. [3][4][5][6] Moreover, L-cysteine plays an important role in medicine and the food industry, like being used as a food additive 7,8 and detoxifying heavy metals and radioactive drugs. 9 Considering the aforementioned properties, the detection of Lcysteine is of great signicance for human health and food quality assurance.…”

Section: Introductionmentioning

confidence: 99%

A self-cascade system based on Ag nanoparticle/single-walled carbon nanotube nanocomposites as an enzyme mimic for ultrasensitive detection of l-cysteine

Li¹,

Hu²,

Su³

et al. 2023

Anal. Methods

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A highly selective and sensitive “on–off” fluorescent probe for detecting cadmium ions and l-cysteine based on nitrogen and boron co-doped carbon quantum dots

Abstract: Schematic presentation of the synthesis of N,B-CQDs and their application as an “on–off” fluorescent probe for Cd2+ and l-Cys detection.

Cited by 23 publications

References 48 publications

The synthesis of N‐doped carbon dots for visual differentiating and detection of tetracyclines

The synthesis of N‐doped carbon dots for visual differentiating and detection of tetracyclines

Fluorescent Quantum Dots and Its Composites for Highly Sensitive Detection of Heavy Metal Ions and Pesticide Residues: A Review

A self-cascade system based on Ag nanoparticle/single-walled carbon nanotube nanocomposites as an enzyme mimic for ultrasensitive detection of l-cysteine

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