The optimum parameters to synthesize bright and stable graphene quantum dots by hydrothermal method

Ma, Mingjunfu; Hu, Xinyi; Zhang, Chaobo; Deng, Chaoyong; Wang, Xu

doi:10.1007/s10854-017-6337-4

Cited by 21 publications

(11 citation statements)

References 25 publications

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“…The carbon quantum dot (CQD), a quantum-sized carbon material, has drawn great attention as a novel material due to its super hydrophilicity, good biocompatibility, and excellent photoluminescence properties [1,2,3,4]. The light-absorbing properity of CQD render them applicable for photocatalysis, energy conversion, optoelectronic devices, and chemical sensors [5,6,7].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Carbon Quantum Dot Nanoparticles Derived from Byproducts in Bio-Refinery Process for Cell Imaging and In Vivo Bioimaging

et al. 2019

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The carbon quantum dot (CQD), a fluorescent carbon nanoparticle, has attracted considerable interest due to its photoluminescent property and promising applications in cell imaging and bioimaging. In this work, biocompatible, photostable, and sustainably sourced CQDs were synthesized from byproducts derived from a biorefinery process using one-pot hydrothermal treatment. The main components of byproducts were the degradation products (autohydrolyzate) of biomass pretreated by autohydrolysis. The as-synthesized CQDs had a size distribution from 2.0–6.0 nm and had high percentage of sp2 and sp3 carbon groups. The CQDs showed blue-green fluorescence with a quantum yield of ~13%, and the fluorescence behaviors were found to be stable with strong resistance to photobleaching and temperature change. In addition, it is found that the as-synthesized CQDs could be used for imaging of cells and tumors, which show potential applications in bioimaging and related fields such as phototherapy and imaging.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Carbon Quantum Dot Nanoparticles Derived from Byproducts in Bio-Refinery Process for Cell Imaging and In Vivo Bioimaging

et al. 2019

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“…41,63−65 In addition to the PLQY, a stable PL emission under continuous irradiation is another important requirement for practical applications. 66,67 The PL spectra measured under continuous irradiation showed a stable PL emission intensity, indicating that LGQDs/Mn-LGQDs are resistant to photobleaching (Figure S14).…”

Section: Used For the Optical Band Gap Calculation Is Given Bymentioning

confidence: 99%

In Situ Doping-Enabled Metal and Nonmetal Codoping in Graphene Quantum Dots: Synthesis and Application for Contaminant Sensing

Nair

Chava

Bose

et al. 2020

ACS Sustainable Chem. Eng.

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Fluorescent graphene quantum dots (GQDs) prepared from low-cost and sustainable precursors are highly desirable for various applications, including luminescence-based sensing, optoelectronics, and bioimaging. Among different natural precursors, the unique structural and compositional variety and the abundance of aromatic carbon in lignin make it a unique and renewable precursor for the green synthesis of advanced carbon-based materials including GQDs. However, the inferior photoluminescence quantum yield of GQDs prepared from natural precursors, including lignin, limits their practical utility. Here, for the first time, we demonstrate that the presence of heteroatoms in the innate structure of lignosulfonate can be leveraged to derive in situ heteroatom-doped GQDs with excellent photophysical properties. The as-synthesized lignosulfonate-derived GQDs showed compelling blue fluorescence with a high quantum yield of 23%, which is attributed to in situ S and N doping as confirmed by using X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy analyses. Assisted by the in situ doping, we further engineered the lignosulfonate-derived GQDs by incorporating a metal atom dopant to derive an enhanced quantum yield of 31%, the highest for any lignin-derived GQDs. Moreover, fundamental photoluminescence studies reveal the presence of multiple emissive centers, with edge states acting as dominant emission centers. Finally, we also demonstrate the applicability of the luminescent, metal- and nonmetal-codoped lignin-derived GQDs as a highly selective sensor for the sub-nanomolar level detection of mercuric ions in water.

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“…The existing preparation methods of GQD mainly focuses on the hydrothermal cutting method, oxidative cutting carbon fiber method, and electrochemical peeling method [20][21][22]. The hydrothermal cutting method is similar to the oxidative cutting carbon fiber method, and the method is a classic method for preparing GQD, but the method is relatively cumbersome, and a variety of strong acids are introduced [23]. The electrochemical stripping method requires a long time for pre-processing graphite, slow process of post-processing products, and low synthesis yield Ivyspring International Publisher [24].…”

Section: Introductionmentioning

confidence: 99%

Graphene Quantum Dots prepared by Electron Beam Irradiation for Safe Fluorescence Imaging of Tumor

Cao¹,

Qi²,

Gao³

et al. 2022

Nanotheranostics

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The optimum parameters to synthesize bright and stable graphene quantum dots by hydrothermal method

Cited by 21 publications

References 25 publications

Synthesis of Carbon Quantum Dot Nanoparticles Derived from Byproducts in Bio-Refinery Process for Cell Imaging and In Vivo Bioimaging

Synthesis of Carbon Quantum Dot Nanoparticles Derived from Byproducts in Bio-Refinery Process for Cell Imaging and In Vivo Bioimaging

In Situ Doping-Enabled Metal and Nonmetal Codoping in Graphene Quantum Dots: Synthesis and Application for Contaminant Sensing

Graphene Quantum Dots prepared by Electron Beam Irradiation for Safe Fluorescence Imaging of Tumor

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