The Role of N and S Doping on Photoluminescent Characteristics of Carbon Dots from Palm Bunches for Fluorimetric Sensing of Fe3+ Ion

Saengsrichan, Aphinan; Saikate, Chaiwat; Silasana, Peeranut; Khemthong, Pongtanawat; Wanmolee, Wanwitoo; Phanthasri, Jakkapop; Youngjan, Saran; Posoknistakul, Pattaraporn; Ratchahat, Sakhon; Laosiripojana, Navadol; Wu, Kevin C.‐W.; Sakdaronnarong, Chularat

doi:10.3390/ijms23095001

Cited by 25 publications

(22 citation statements)

References 77 publications

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“…At the same time, altering the core–shell CQD composition by N-, S-, P-, or B-doping enhances the fluorescence quantum yield (QY). Such doping alters the energy between the lowest unoccupied (LUMO) and the highest occupied molecular orbitals (HOMO) . By the interplay of CQD chemistry and morphology, it is possible to obtain fluorescence in the full spectral range from ultraviolet (UV) to near-IR (NIR).…”

Section: Introductionmentioning

confidence: 99%

“…Such doping alters the energy between the lowest unoccupied (LUMO) and the highest occupied molecular orbitals (HOMO). 12 By the interplay of CQD chemistry and morphology, it is possible to obtain fluorescence in the full spectral range from ultraviolet (UV) to near-IR (NIR). With the above characteristics, CQDs emerge as promising biosensors, 13 imaging agents, 14 and drug delivery systems, 15 along with multi-modality.…”

Section: Introductionmentioning

confidence: 99%

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Carbon Quantum Dots from Amino Acids Revisited: Survey of Renewable Precursors toward High Quantum-Yield Blue and Green Fluorescence

et al. 2022

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Carbon quantum dots (CQDs) were synthesized via a green, one-step hydrothermal method. As CQD precursors, nine amino acids of different structural descriptors (negatively/positively charged in water, polar, hydrophobic, sulfur-containing, and other/complex ones) were surveyed: Asp, Cys, Gly, His, Leu, Lys, Phe, Pro, and Ser. The reactions were performed in an autoclave in the presence of citric acid at 180 °C for 24 h and yielded core–shell CQDs. CQDs were comprehensively characterized by transmission electron microscopy, dynamic light scattering, Raman, UV/Vis, infrared, X-ray photoelectron spectroscopy, and fluorescence spectroscopy. At the excitation wavelength of λex = 350 nm, Cys-, Phe-, Leu-, and Lys-based CQDs displayed the highest quantum yield blue fluorescence90 ± 5, 90 ± 4, 87 ± 5, and 67 ± 3%, respectivelysuperior to the conventional fluorescent dyes. Strikingly, for Lys- and Phe-CQDs, dissimilar trends in the excitation–emission wavelength relationships were identified, that is, constantly strong red shifts versus excitation wavelength-independent emission. Cys- and Lys-CQDs were water-dispersible toward the narrow unimodal distribution of hydrodynamic diameters0.6 and 2.5 nm, respectively. Additionally, Lys- and Cys-CQDs, with high absolute zeta potential values, formed stable aqueous colloids in a broad range of pH (2, 7, and 12). The results constitute important premises for water-based applications of CQDs, such as bioimaging or photocatalysis.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Carbon Quantum Dots from Amino Acids Revisited: Survey of Renewable Precursors toward High Quantum-Yield Blue and Green Fluorescence

et al. 2022

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“…[19]. Recently, hydrothermal carbonization of biomass has been one of the most attractive routes for the preparation of carbon, since this method is green, simple, and eco-friendly [18,20]. Among various biomass resources for preparing carbon spheres, hemicelluloses are very promising because they are considered as the second most abundant renewable resource only after cellulose.…”

Section: Introductionmentioning

confidence: 99%

Porous Carbon Spheres Derived from Hemicelluloses for Supercapacitor Application

Wang

Cao

et al. 2022

IJMS

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With the increasing demand for dissolving pulp, large quantities of hemicelluloses were generated and abandoned. These hemicelluloses are very promising biomass resources for preparing carbon spheres. However, the pore structures of the carbon spheres obtained from biomass are usually poor, which extensively limits their utilization. Herein, the carbon microspheres derived from hemicelluloses were prepared using hydrothermal carbonization and further activated with different activators (KOH, K2CO3, Na2CO3, and ZnCl2) to improve their electrochemical performance as supercapacitors. After activation, the specific surface areas of these carbon spheres were improved significantly, which were in the order of ZnCl2 > K2CO3 > KOH > Na2CO3. The carbon spheres with high surface area of 2025 m2/g and remarkable pore volume of 1.07 cm3/g were achieved, as the carbon spheres were activated by ZnCl2. The supercapacitor electrode fabricated from the ZnCl2-activated carbon spheres demonstrated high specific capacitance of 218 F/g at 0.2 A/g in 6 M KOH in a three-electrode system. A symmetric supercapacitor was assembled in 2 M Li2SO4 electrolyte, and the carbon spheres activated by ZnCl2 showed excellent electrochemical performance with high specific capacitance (137 F/g at 0.5 A/g), energy densities (15.4 Wh/kg), and good cyclic stability (95% capacitance retention over 2000 cycles).

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“…Since Xu found carbon nanoparticles with fluorescence for the first time in the separation and purification of single-walled carbon nanotubes by electrophoresis in 2004 [ 9 ], the study of fluorescent CDs has attracted increasing attention. Since there are many raw materials and a variety of preparation methods available in the CD preparation process, various CDs have been prepared [ 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Multicolour Solid Fluorescent Carbon Dots for Light-Emitting Diodes Using Phenylethylamine as a Co-Carbonization Agent

Liu

et al. 2022

IJMS

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Carbon dots (CDs), as a new type of photoluminescent nanomaterial, have attracted extensive attention in various fields because of their unique luminescence properties. However, CDs will exhibit fluorescence quenching in the solid state or aggregate state, which limits their application. In this paper, a unique strategy is proposed to regulate solutions to achieve multicolour fluorescence of CDs in the solid state. We report the successful preparation of orange, green and blue solid fluorescent CDs using citric acid, urea and phenylethylamine as precursors and methanol, ethanol and water as solvents, respectively. The solid-state fluorescence of CDs may be caused by the linkage of the phenylethyl structure to the surface of CDs during formation, which effectively disperses the CDs and prevents π–π interactions between graphitized nuclei. Meanwhile, multicolour solid fluorescent CDs are realized by adjusting the solvent in the preparation process. Based on the excellent fluorescence properties of CDs, orange, green and blue light-emitting diodes (LEDs) are prepared. A white LED (WLED) can be obtained by mixing the three colours of solid fluorescent CDs, which shows the application potential of CDs in display lighting equipment.

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The Role of N and S Doping on Photoluminescent Characteristics of Carbon Dots from Palm Bunches for Fluorimetric Sensing of Fe3+ Ion

Cited by 25 publications

References 77 publications

Carbon Quantum Dots from Amino Acids Revisited: Survey of Renewable Precursors toward High Quantum-Yield Blue and Green Fluorescence

Carbon Quantum Dots from Amino Acids Revisited: Survey of Renewable Precursors toward High Quantum-Yield Blue and Green Fluorescence

Porous Carbon Spheres Derived from Hemicelluloses for Supercapacitor Application

Preparation of Multicolour Solid Fluorescent Carbon Dots for Light-Emitting Diodes Using Phenylethylamine as a Co-Carbonization Agent

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