Graphene oxide-assisted synthesis of N, S Co-doped carbon quantum dots for fluorescence detection of multiple heavy metal ions

Yu-jie, Shen; Rong, Mingcong; Qu, Xiao; Zhao, Bolin; Zou, Jinhui; Liu, Zhenbang; Bao, Yu; He, Yan; Li, Siyi; Wang, Xiaojin; Chen, Kaiying; Zhang, Yuwei; Niu, Li

doi:10.1016/j.talanta.2022.123224

Cited by 26 publications

(14 citation statements)

References 44 publications

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“…This can be attributed to the fact that Fe 2+ /Fe 3+ have a stronger affinity toward the functional groups on the N, S-PPI-CDs surface (including hydroxyl, carboxyl and amino) than other metal ions [ 45 , 57 , 58 ]. In addition, the potential strong coordination interaction between the doped S element and the iron ion is of great significance to the quenching of the N, S-PPI-CDs’ fluorescence [ 59 ]. Due to Fe 2+ /Fe 3+ being contained in LF, we can realize the detection of LF with the specific capture of Fe 2+ /Fe 3+ in LF by the N, S-PPI-CDs.…”

Section: Resultsmentioning

confidence: 99%

N, S-Doped Carbon Dots Prepared by Peanut Protein Isolates and Cysteamine as Highly Sensitive Fluorescent Sensors for Fe2+, Fe3+ and Lactoferrin

Wang

et al. 2022

Polymers

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Lactoferrin (LF) is an iron-binding glycoprotein with various biological activities that has been extensively used in food and medical applications. Several methods for detecting LF have been reported, but they still face challenges in terms of sensitivity and simplicity of detection. To achieve an accurate and efficient detection of LF, we developed a method for the determination of LF in lactoferrin supplements using carbon dots (CDs) fluorescent probes. The N, S-doped PPI carbon dots (N, S-PPI-CDs) were prepared using a protein (peanut protein isolate) and cysteamine as precursors. The prepared N, S-PPI-CDs exhibited intense blue fluorescence and good biocompatibility, while the fluorescence intensity of the N, S-PPI-CDs showed a good linear relationship with Fe2+/Fe3+ concentration (0–2 μM). The N, S-PPI-CDs exhibited a high potential ability to rapidly detect Fe2+/Fe3+ within 30 s, with a limit of detection (LoD) of 0.21 μM/0.17 μM. Due to the reversible binding of LF to Fe, the N, S-PPI-CDs showed a high sensitivity and selectivity for LF, with a limit of detection (LoD) of 1.92 μg/mL. In addition, LF was quantified in real sample LF supplements and showed a fluctuation in recovery of less than 2.48%, further demonstrating the effectiveness of the fluorescent N, S-PPI-CDs sensor.

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Section: Resultsmentioning

confidence: 99%

N, S-Doped Carbon Dots Prepared by Peanut Protein Isolates and Cysteamine as Highly Sensitive Fluorescent Sensors for Fe2+, Fe3+ and Lactoferrin

Wang

et al. 2022

Polymers

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“…Niu Li et al. synthesized N, S‐CQDs with L‐cysteine and aqueous ammonia as precursors through graphene oxide‐assisted synthesis method [57] . The fluorescence of N, S‐CQDs was stable in a wide range of pH 4–11, which was satisfactory for ion detection over a wide range of acidity.…”

Section: Modification Methodsmentioning

confidence: 99%

Modification of Carbon Dots for Metal‐Ions Detection

Fan

Liu

et al. 2023

ChemistrySelect

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It is very appealing to develop cheap, highly sensitive and efficient metal ion fluorescence sensors as traditional instrument methods are inherently costly and time‐consuming. Carbon dots (CDs) are widely used for sensing metal ions, attributing to their merits of good biocompatibility, low toxicity, easy surface modification and excellent photostability. This article reviewed the research progress of CDs as metal ion sensors in recent years, and studied their modification methods and detection performances. Finally, the challenges and opportunities of CDs as metal ion sensors were also analyzed. This article is expected to provide inspiration and help for researchers focusing on CDs as metal ion sensors.

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“…The LOD is observed to be 1.0 × 10 −4 M in the range of 0.001 to 0.1 M. The relative standard deviation is calculated for the developed B,N-GQDs based sensor and is observed to be 2.99% with the regression coefficient of 0.997. 107 …”

Section: Application In Real Samplesmentioning

confidence: 99%

Facile and scalable synthesis of un-doped, doped and co-doped graphene quantum dots: a comparative study on their impact for environmental applications

et al. 2023

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Graphene oxide-assisted synthesis of N, S Co-doped carbon quantum dots for fluorescence detection of multiple heavy metal ions

Cited by 26 publications

References 44 publications

N, S-Doped Carbon Dots Prepared by Peanut Protein Isolates and Cysteamine as Highly Sensitive Fluorescent Sensors for Fe2+, Fe3+ and Lactoferrin

N, S-Doped Carbon Dots Prepared by Peanut Protein Isolates and Cysteamine as Highly Sensitive Fluorescent Sensors for Fe2+, Fe3+ and Lactoferrin

Modification of Carbon Dots for Metal‐Ions Detection

Facile and scalable synthesis of un-doped, doped and co-doped graphene quantum dots: a comparative study on their impact for environmental applications

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