Microwave–hydrothermal synthesis of fluorescent carbon dots from graphite oxide

Wang, Qinlong; Zheng, Huzhi; Long, Yijuan; Zhang, Lingyan; Gao, Mei; Bai, Wei

doi:10.1016/j.carbon.2011.03.041

Cited by 322 publications

(192 citation statements)

References 38 publications

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“…The quantum yield was calculated to be about 68.22% using rhodamine 6G in ethanol as the standard (in ethanol, 95%) [27]. To the best of our knowledge, the quantum yield is much higher than that of most of the reported F-CNPs [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. The F-CNPs exhibited good photostability through the study of UV light illumination and the addition of oxidant (H 2 O 2 ).…”

Section: Resultsmentioning

confidence: 96%

“…Now, many approaches for the synthesis of F-CNPs have been reported, such as arc discharge, laser ablation, electrochemical oxidation, combustion, thermal treatment, ultrasonic treatment and microwave methods [9][10][11][12][13][14][15][16][17][18]. Yang's group reported a microwave pyrolysis method for the synthesis of F-CNPs using glucose and poly(ethylene glycol) [11].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrothermal synthesis of highly fluorescent carbon nanoparticles from sodium citrate and their use for the detection of mercury ions

Guo¹,

Wang²,

Shao³

et al. 2013

Carbon

512

285

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of highly fluorescent carbon nanoparticles from sodium citrate and their use for the detection of mercury ions

Guo¹,

Wang²,

Shao³

et al. 2013

Carbon

512

285

View full text Add to dashboard Cite

“…In general, the synthetic methods for C-dots include arcdischarge [2], electrochemical oxidation [3][4][5], laser ablation [6][7][8][9], hydrothermal synthesis [10][11][12][13][14][15], pyrolysis [16][17][18][19], microwave-assisted heating [20][21][22][23][24][25][26], plasma treatment [27], neutralization heating [28], and sonication treatment [29] (Scheme 1). All these synthetic methods allow, up to some extent, preparing moderately high-quality C-dots with relatively high PL performance and small size.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Gong

Liu

et al. 2017

Journal of Nanomaterials

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Carbon nanodots (C-dots) are recently discovered fluorescent carbon nanoparticles with typical sizes of <10 nm. The C-dots have been reported to have excellent photophysical and chemical characteristics. In recent years, the advances in the development and improvement in C-dots synthesis, characterization, and applications are burgeoning. In this review, we introduce the most commonly used techniques for the characterization of C-dots. The characterization techniques for C-dots are briefly classified, described, and illustrated with applied examples. In addition, the analytical separation methods for C-dots (including electrophoresis, chromatography, density gradient centrifugation, differential centrifugation, solvent extraction, and dialysis) are included and discussed according to their analytical characteristics. The review concludes with an outlook towards the future developments in the characterization and the analytical separation of C-dots. The comprehensive overview of the characterization and the analytical separation techniques will safeguard people to use each technique more wisely.

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“…27,28 Their fluorescence spectrum is usually dependent on excitation wavelength with a relatively low quantum yield of lower than 15%. [29][30][31] The carbon dots formed through bottom-up approaches are more well known because of their facile synthesis and outstanding fluorescence quantum yield. So far, their photo-stability has not been studied in detail, but is a crucial factor for any application.…”

mentioning

confidence: 99%

Photobleaching and stabilization of carbon nanodots produced by solvothermal synthesis

Wang

Damm

Walter

et al. 2016

Phys. Chem. Chem. Phys.

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In this work we performed a detailed investigation of the photostability of bottom-up produced carbon nanodots (CDs) prepared from citric acid and urea by solvothermal synthesis. Analytical ultracentrifugation (AUC) reveals that the CDs have a hydrodynamic diameter of o1 nm and a very narrow size distribution.In the community it is widely assumed that CDs are photo-stable. In contrast, we found that CDs exposed to UV-irradiation exhibit noteworthy fluorescence degeneration compared to freshly prepared CDs or CDs stored in the dark, indicating that fluorescence bleaching is caused by a photochemical process. We found that fluorescence intensity decay due to exposure to UV-irradiation is accelerated in the presence of oxygen and identified the surface status of CDs as the decisive factor of fluorescence bleaching of CDs.Based on a discussion on the underlying mechanisms we show how to avoid photobleaching of CDs.

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Microwave–hydrothermal synthesis of fluorescent carbon dots from graphite oxide

Cited by 322 publications

References 38 publications

Hydrothermal synthesis of highly fluorescent carbon nanoparticles from sodium citrate and their use for the detection of mercury ions

Hydrothermal synthesis of highly fluorescent carbon nanoparticles from sodium citrate and their use for the detection of mercury ions

Characterization and Analytical Separation of Fluorescent Carbon Nanodots

Photobleaching and stabilization of carbon nanodots produced by solvothermal synthesis

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