One-pot electrochemical synthesis of functionalized fluorescent carbon dots and their selective sensing for mercury ion

Hou, Yuxin; Lu, Qiujun; Deng, Junhong; Li, Haitao; Zhang, Youyu

doi:10.1016/j.aca.2015.01.039

Cited by 256 publications

(107 citation statements)

References 18 publications

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“…The results clearly demonstrated that only Pb 2+ could efficiently quenched the fluorescence intensity of the CDs, while the quenching effect of the other metal ions was negligible. This discrimination effect may be ascribed to that Pb 2+ had a stronger affinity and chelated fast with hydroxyl groups existing on the surface of CDs in comparison with other metal ions [3,39,44]. In another series of experiments, the mixtures of 0.1 μM Pb 2+ and 0.5 μM of the above-mentioned metal ions were added into the CDs solution, and then the fluorescence responses of CDs (Fig.…”

Section: Selectivitymentioning

confidence: 98%

“…3A). This phenomenon may be attributed to the chelating between Pb 2+ and the hydroxyl group on the surface of CDs, and the chelating can facilitate non-radiative recombination of the excitons through an effective electron transfer process, leading to a remarkable decrease of the fluorescence intensity of CDs [39,44]. What's more, some critical factors of experimental parameters such as the concentration of CDs, the incubation time, and pH of CDs solutions were further investigated for obtaining good parameters for the detection of Pb 2+ based on the fluorescence quenching mechanism.…”

Section: Optimization For the Determination Of Pb 2+mentioning

confidence: 98%

See 1 more Smart Citation

Selective and sensitive chemosensor for lead ions using fluorescent carbon dots prepared from chocolate by one-step hydrothermal method

Liu

Zhou

et al. 2016

Sensors and Actuators B: Chemical

170

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Section: Selectivitymentioning

confidence: 98%

Section: Optimization For the Determination Of Pb 2+mentioning

confidence: 98%

Selective and sensitive chemosensor for lead ions using fluorescent carbon dots prepared from chocolate by one-step hydrothermal method

Liu

Zhou

et al. 2016

Sensors and Actuators B: Chemical

170

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“…CDs synthesized by carbonizing ethylene glycol in sulfuric acid could also be used as fluorescent probe for the detection of Hg 2+ based on the similar process [31]. Hou et al proposed CDs via electrochemical carbonization of sodium citrate and urea for Hg 2+ sensing due to the chelation between Hg 2+ and carboxylic groups [32]. Mohapatra's group synthesized CDs through thermal treatment of polymeric molecular precursor for the detection of Hg 2+ [33].…”

Section: Mercury (Ii) Ion Detectionmentioning

confidence: 99%

Carbon dots: synthetic methods and applications as fluorescent probes for the detection of metal ions, inorganic anions and organic molecules

et al. 2015

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and biological materials. It has been found that fluorescent probes are one of the most successful approaches. Fluorescent probes such as organic molecules have the advantages of high sensitivity and fast analysis, but they suffer from low water solubility. Semiconductor quantum dots (QDs) can be used as fluorescent probes, while the issue of toxicity limits their practical applications [1,2]. Fluorescent carbon dots (CDs) with similar physicochemical properties of QDs and relatively low in toxicity and cost of synthesis are the most suitable alternatives to organic molecules and QDs [3]. CDs gradually become a rising star as fluorescent probes in a number of fields [4,5]. CDs, a new member of carbon nanomaterial family with diameter below 10 nm, have great fluorescent performance, excellent dispersity and biocompatibility [6,7]. The synthetic methods of CDs can be classified into top-down and bottom-up approaches [8].Top-down methods rely on reducing the size of the graphite-like structures until the products become fluorescent nanoparticles. In the bottom-up processes, anything with carbogenic nature can synthesize CDs under suitable conditions [9]. Always the synthetic strategies and the precursors affect the internal properties of the resulting nanoparticles such as the size, crystallinity, oxygen or nitrogen content, emission characteristics and compatibility with a particular solvent [10][11][12][13]. Particularly, with the advantages of great dispersibility in water and tunable fluorescence, CDs are also becoming attractive alternatives for novel fluorescence markers, fluorescent probes and optical probes [14,15].In this review, we mainly summarize the recent advances of CDs about the easy synthesises, sensitive fluorescent detections of ions and organic molecules and possible detection mechanisms. It is our aim that the synthesis of this knowledge will offer valuable insight and inspire research into the exciting areas. Some suggestions and an outlook are put forward about the applications of CDs.Abstract Carbon dots (CDs), a new class of fluorescent materials, have recently attracted considerable research interest. CDs have overcome some defects of traditional nanomaterial. In addition to their small size and optical properties, CDs have the excellent advantages of good biocompatibility and are easy to achieve surface functionalization. Since this discovery, CDs can be widely used in the field of biochemical sensing and environmental testing. This article reviews the progress in the research and development of CDs on their syntheses, applications for the fluorescence detection and possible mechanisms. Finally, we have an outlook of the research trends and future prospects of CDs.

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“…In recent years, researchers have developed several applications using CDs. For example, there are numerous accounts on the use of different CDs for the detection of ions [14][15][16]. In this paper, we designed an NBS-rCDs(OH − ) CL system and detected the concentration of cobalt ion solutions based on the cobalt ion-improved CL intensity of the analysis system.…”

Section: Introductionmentioning

confidence: 99%

NBS–rCDs(OH−) chemiluminescence analysis system for the determination of cobalt ions

Chen

Zhang

et al. 2015

Diamond and Related Materials

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One-pot electrochemical synthesis of functionalized fluorescent carbon dots and their selective sensing for mercury ion

Cited by 256 publications

References 18 publications

Selective and sensitive chemosensor for lead ions using fluorescent carbon dots prepared from chocolate by one-step hydrothermal method

Selective and sensitive chemosensor for lead ions using fluorescent carbon dots prepared from chocolate by one-step hydrothermal method

Carbon dots: synthetic methods and applications as fluorescent probes for the detection of metal ions, inorganic anions and organic molecules

NBS–rCDs(OH−) chemiluminescence analysis system for the determination of cobalt ions

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