One-Pot Facile Synthesis of Graphene Quantum Dots from Rice Husks for Fe<sup>3+</sup> Sensing

Wang, Weilin; Wang, Zhaofeng; Liu, Jingjing; Peng, Yikang; Yu, Xiaoyuan; Zhang, Zhengguo; Sun, Luyi

doi:10.1021/acs.iecr.8b00913

Cited by 81 publications

(58 citation statements)

References 58 publications

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“…They also wrote about the Fe-GQDs complexes that promote charge transfer between them. Based on the plotted graph, a linear relation was observed between PL response and Fe 3+ concentration raised to 10 mM, and the calculated detection limit equaled 5.8 nM [41].…”

Section: Incorporation Of Graphene Quantum Dots With Optical Sensomentioning

confidence: 99%

Development of Graphene Quantum Dots-Based Optical Sensor for Toxic Metal Ion Detection

Anas

Fen

Omar

et al. 2019

Sensors

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About 71% of the Earth’s surface is covered with water. Human beings, animals, and plants need water in order to survive. Therefore, it is one of the most important substances that exist on Earth. However, most of the water resources nowadays are insufficiently clean, since they are contaminated with toxic metal ions due to the improper disposal of pollutants into water through industrial and agricultural activities. These toxic metal ions need to be detected as fast as possible so that the situation will not become more critical and cause more harm in the future. Since then, numerous sensing methods have been proposed, including chemical and optical sensors that aim to detect these toxic metal ions. All of the researchers compete with each other to build sensors with the lowest limit of detection and high sensitivity and selectivity. Graphene quantum dots (GQDs) have emerged as a highly potential sensing material to incorporate with the developed sensors due to the advantages of GQDs. Several recent studies showed that GQDs, functionalized GQDs, and their composites were able to enhance the optical detection of metal ions. The aim of this paper is to review the existing, latest, and updated studies on optical sensing applications of GQDs-based materials toward toxic metal ions and future developments of an excellent GQDs-based SPR sensor as an alternative toxic metal ion sensor.

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Section: Incorporation Of Graphene Quantum Dots With Optical Sensomentioning

confidence: 99%

Development of Graphene Quantum Dots-Based Optical Sensor for Toxic Metal Ion Detection

Anas

Fen

Omar

et al. 2019

Sensors

View full text Add to dashboard Cite

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“…The properties of CDs such as highly fluorescent, environment-friendly and facile synthesis make them suitable materials for ion detection. Based on the fluorescence quenching or enhancement caused by the interactions with ions, CDs can be applied in the detection of multiple ions, such as Fe 3+ , Pb 2+ Hg 2+ , Cr 6+ , Cr 3+ , Be 2+ , ClO − , ONOO − and I − 18–26 . However, detection of ferricyanide ([Fe(CN) 6 ] 3− ) by fluorescent probe based on CDs has not been reported previously.…”

Section: Introductionmentioning

confidence: 99%

Carbon dots with molecular fluorescence and their application as a “turn-off” fluorescent probe for ferricyanide detection

Wang

et al. 2019

Sci Rep

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Highly fluorescent carbon dots (CDs) exhibiting molecular fluorescence were synthesized and successfully used for sensing ferricyanide based on fluorescence quenching. We conducted dialysis to purify the CDs and found that the dialysate is also fluorescent. From the mass spectra and quantum yield analyses of the dialysate, it is demonstrated that molecular fluorophores were also synthesized during the synthesis of CDs. By the comparison of fluorescence spectra between CDs and dialysate, it is established that the fluorescence emission of CDs partly originates from fluorophores that are attached to CDs’ surface. The fluorescence quenching caused by ferricyanide is proved to be the overlap of absorption spectra between ferricyanide and CDs. The changes of the absorbance and fluorescence spectra are combined to enhance the detection sensitivity, and the limit of detection is calculated to be 1.7 μM. A good linear response of fluorescence-absorbance combined sensing toward ferricyanide is achieved in the range of 5–100 µM. This method is highly selective to ferricyanide among other common cations and anions, and it is also successfully applied in detecting ferricyanide in real water samples.

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“…Since the phenolic hydroxyl groups in LBE molecule could form complexes with Fe 3+ ions as an electron donor, which was beneficial to facilitate charge transfer (Guo et al, 2015 ; Shen et al, 2017 ). The recombination of excitons was inhibited and then a significant fluorescence quenching occurred (Zhang Y. L. et al, 2013 ; Wang et al, 2018 ). Figure 7B and Figure S10 showed the relative fluorescence response of LBE(I 0 /I) according to the concentration of Fe 3+ , where I 0 and I are the fluorescence intensities of LBE in the absence and presence of Fe 3+ ions, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…This value is well below the maximum allowable level of Fe 3+ in drinking water set by the World Health Organization (5.36 μM), Moreover, the method of detecting Fe 3+ based on carbon dots in this article was comparable or even better than that in other previous reports (Shen et al, 2017 ; Chen et al, 2019 ; Arumugham et al, 2020 ). The results indicated that LBE owned a good application prospect in the detection of trace Fe 3+ due to the low LOD of Fe 3+ (Wang et al, 2018 ).…”

Section: Resultsmentioning

confidence: 99%

Biomass-Based Polymer Nanoparticles With Aggregation-Induced Fluorescence Emission for Cell Imaging and Detection of Fe3+ Ions

Han

et al. 2020

Front. Chem.

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Polymeric nanoparticles, which show aggregation-induced luminescence emission, have been successfully prepared from larch bark, a natural renewable biomass resource, in a simple, rapid ultrasonic fragmentation method. The structure, element, particle size and molecular weight distribution of larch bark extracts (LBE) were studied by FTIR, XPS, TEM, XRD and linear mode mass spectrometry, respectively. LBE was found containing large numbers of aromatic rings, displaying an average particle size of about 4.5 nm and mainly presenting tetramers proanthocyanidins. High concentration, poor solvent, low temperature and high viscosity restricted the rotation and vibration of the aromatic rings in LBE, leading to the formation of J-aggregates and enhancing the aggregationinduced fluorescence emission. LBE possessed good resistance to photobleaching under ultraviolet light (200 mW/m 2). Cytotoxicity experiments for 24 h and flow cytometry experiments for 3 days proved that even the concentrations of LBE as high as 1 mg/mL displayed non-toxic to MG-63 cells. Therefore, LBE could be employed for MG-63 cell imaging, with similar nuclear staining to the DAPI. The effects of different metal ions on the fluorescence emission intensity of LBE were analyzed and exhibited that Fe 3+ owned obvious fluorescence quenching effect on LBE, while other metal ions possessed little or weak effect. Furthermore, the limit of detection (LOD) of Fe 3+ was evaluated as 0.17 µM.

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One-Pot Facile Synthesis of Graphene Quantum Dots from Rice Husks for Fe³⁺ Sensing

Cited by 81 publications

References 58 publications

Development of Graphene Quantum Dots-Based Optical Sensor for Toxic Metal Ion Detection

Development of Graphene Quantum Dots-Based Optical Sensor for Toxic Metal Ion Detection

Carbon dots with molecular fluorescence and their application as a “turn-off” fluorescent probe for ferricyanide detection

Biomass-Based Polymer Nanoparticles With Aggregation-Induced Fluorescence Emission for Cell Imaging and Detection of Fe3+ Ions

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One-Pot Facile Synthesis of Graphene Quantum Dots from Rice Husks for Fe3+ Sensing

Cited by 81 publications

References 58 publications

Development of Graphene Quantum Dots-Based Optical Sensor for Toxic Metal Ion Detection

Development of Graphene Quantum Dots-Based Optical Sensor for Toxic Metal Ion Detection

Carbon dots with molecular fluorescence and their application as a “turn-off” fluorescent probe for ferricyanide detection

Biomass-Based Polymer Nanoparticles With Aggregation-Induced Fluorescence Emission for Cell Imaging and Detection of Fe3+ Ions

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Product

Resources

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One-Pot Facile Synthesis of Graphene Quantum Dots from Rice Husks for Fe³⁺ Sensing