A “turn-on” fluorescence sensor for Pb2+ detection based on graphene quantum dots and gold nanoparticles

Niu, Xinli; Zhong, Yuanbo; Chen, Rui; Wang, Fei; Liu, Yanjun; Luo, Dan

doi:10.1016/j.snb.2017.08.167

Cited by 184 publications

(68 citation statements)

References 31 publications

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“…The enhancement in the fluorescence intensity may be due to the chelation of Pb(II) ions by GE functional moieties, such as polyphenolic and flavonoid compounds. The detection limit was lower than those reported from 2018 to 2019, as listed in Table 1 [12,[20][21][22][23]. Figure 4C illustrates the selectivity of mw_G-BSA-AuNCs for the detection of Pb(II) ions versus the detection of other metal ions, such as Cu(II), Co(II), Mg(II), Hg(II), Ca(II), Mn(II), Na(I), Ba(II) Zn(II), Fe(II), Fe(III), Cr(III) and Cd(II), in the sensing platform.…”

Section: Sensitivity and Selectivity For Pb(ii) Detection By Mw_g-bsamentioning

confidence: 60%

Microwave Synthesis of Gold Nanoclusters with Garlic Extract Modifications for the Simple and Sensitive Detection of Lead Ions

2020

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Novel bovine serum albumin (BSA)-gold nanoclusters with garlic extract modifications (mw_G-BSA-AuNCs) were prepared through microwave-assisted rapid synthesis. The modified nanoclusters were characterized and used for the simple and sensitive detection of Pb2+ ions. Both turn-on and turn-off methods were used and compared for Pb2+ ion detection. For Pb2+ ions, the preparation time for the modified nanoclusters was 10 min, and the detection time for the nanoclusters was 6 min. The modified nanoclusters were stable, and their fluorescence intensities changed by less than 10% in 60 days. The detection limit and linear range for the “off-on” method of mw_G-BSA-AuNCs for Pb2+ ion detection were 0.28 and 1–20 nM, respectively. The recoveries of the mw_G-BSA-AuNCs probe used for the detection of the Pb(II) ion in tap water ranged from 93.8% to 102.2%, with an average of 97.1%. The “off-on” method of mw_G-BSA-AuNCs can provide a lower detection limit, higher selectivity, and better recovery than the commonly used “turn-off” methods of mw_BSA-AuNCs for Pb2+ ion detection. The proposed method is superior to other methods proposed from 2018 to 2019 because it can provide a shorter preparation time and a lower detection limit with good selectivity. The microwave-assisted novel compound, mw_G-BSA-AuNCs, can be rapidly synthesized in a green manner and can provide a low detection limit, good selectivity, and a simple and fast reaction for Pb2+ ion detection.

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Section: Sensitivity and Selectivity For Pb(ii) Detection By Mw_g-bsamentioning

confidence: 60%

Microwave Synthesis of Gold Nanoclusters with Garlic Extract Modifications for the Simple and Sensitive Detection of Lead Ions

2020

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“…16 AgRh BNPs exhibited exceptional catalytic functions due to the positive synergistic effect between the Ag and Rh atoms on GQDs, 21,22 and their catalytic activity was better than those of both monometallic counterparts. This graphene exhibited outstanding generation of hydroxyl radicals [17][18][19][20] and further oxidized MB to MB-OH via some positive synergistic effects between the Ag and Rh atoms on GQDs than those of other BNPs and pure Ag or Rh NPs (Fig. 3).…”

Section: Synthesis Of Graphenementioning

confidence: 99%

Graphene nanocrystals in CO₂photoreduction with H₂O for fuel production

Darkwah

Teye

2020

Nanoscale Adv.

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“…Compared with the traditional organic fluorescent materials, QD fluorescent probes have narrower emission spectra, better stability, and photobleaching resistance. For example, carbon QDs,8,9 CdSe QDs,10 CdS QDs,11 perovskites QDs,12 and a combination of functional molecules and QDs have been studied to detect metal ions such as Fe 3+ , Pb 2+ , Hg 2+ , Zn 2+ , and Cd 2+ 13–18. However, currently reported fluorescent probes can be used in only one solvent, it is therefore necessary to develop fluorescent probes with strong selectivity, wide detection range, and low detection limit, which can be used in both aqueous and organic solutions.…”

Section: Introductionmentioning

confidence: 99%

A Fluorescence Probe for Metal Ions Based on Black Phosphorus Quantum Dots

Yuan

et al. 2020

Adv Materials Inter

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spectroscopy (ICP-AES), and surface plasmon resonance sensing. [4][5][6] Although these methods have high detection performances, the complicated preprocessing process and the excessive cost limit their range of use and the detection rate. On the other hand, with the advancement of fluorescence technology, fluorescence detection techniques for metal ions by monitoring the fluorescence enhancement, quenching, or shifting of peak positions have attracted great interests. This type of method has advantages of strong visibility, simple operation, wide detection range, and low price. [7] Recently, quantum dot (QD) fluorescent probes are gradually receiving more attentions. Compared with the traditional organic fluorescent materials, QD fluorescent probes have narrower emission spectra, better stability, and photobleaching resistance. For example, carbon QDs, [8,9] CdSe QDs, [10] CdS QDs, [11] perovskites QDs, [12] and a combination of functional molecules and QDs have been studied to detect metal ions such as Fe 3+ , Pb 2+ , Hg 2+ , Zn 2+ , and Cd 2+ . [13][14][15][16][17][18] However, currently reported fluorescent probes can be used in only one solvent, it is therefore necessary to develop fluorescent probes with strong selectivity, wide detection range, and low detection limit, which can be used in both aqueous and organic solutions.Black phosphorus (BP) as one of the three major allotropes of phosphorus is a 2D van der Waals material whose atomic layers are stacked by weak van der Waals forces. BP can be stripped into nanosheets down to a single layer or quantum dots with bandgaps varying from 0.3 (bulk BP) to 2.0 eV. Due to this unique property, BP has the size and composition-dependent light absorption, long exciton lifetime, high photo luminescence quantum yield, and ability of surface modification. So far, BP has been used as photothermal agents, photodetectors, photocatalysts, organic photovoltaics, electrocatalysts, and the storage media. [19][20][21][22][23][24] BP has also been studied in the field of sensors, such as humidity sensors, [25] ratiometric fluorescent probes developed by the surface modification of organic molecules, [26,27] field effect transistor detection of metal ions. [28] In addition, BP has a wide range of applications in the biological field, including the medicine, drug carriers, and cancer treatment. [29][30][31] In this research, we have successfully prepared black phosphorus quantum dots (BP QDs) with green fluorescence emission, which can directly detect trace Hg 2+ and Cu 2+ ions without the help of organic molecules. In particular, Fluorescence method for detecting metal ions has advantages of fast detection speed, simple operation, and low price over the conventional methods. Black phosphorus quantum dots (BP QDs) have high photoluminescence quantum yield and modifiable surface, which have great potential in the field of fluorescent probes. In this study, high quality BP QDs are prepared by pyrolysis method and are first time used as trace metal ion probes in both organic solut...

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A “turn-on” fluorescence sensor for Pb2+ detection based on graphene quantum dots and gold nanoparticles

Cited by 184 publications

References 31 publications

Microwave Synthesis of Gold Nanoclusters with Garlic Extract Modifications for the Simple and Sensitive Detection of Lead Ions

Microwave Synthesis of Gold Nanoclusters with Garlic Extract Modifications for the Simple and Sensitive Detection of Lead Ions

Graphene nanocrystals in CO₂photoreduction with H₂O for fuel production

A Fluorescence Probe for Metal Ions Based on Black Phosphorus Quantum Dots

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A “turn-on” fluorescence sensor for Pb2+ detection based on graphene quantum dots and gold nanoparticles

Cited by 184 publications

References 31 publications

Microwave Synthesis of Gold Nanoclusters with Garlic Extract Modifications for the Simple and Sensitive Detection of Lead Ions

Microwave Synthesis of Gold Nanoclusters with Garlic Extract Modifications for the Simple and Sensitive Detection of Lead Ions

Graphene nanocrystals in CO2photoreduction with H2O for fuel production

A Fluorescence Probe for Metal Ions Based on Black Phosphorus Quantum Dots

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Graphene nanocrystals in CO₂photoreduction with H₂O for fuel production