2016
DOI: 10.1039/c5nr07335a
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Abstract: In this study, uniform nitrogen-doped carbon quantum dots (N-CDs) were synthesized through a one-step solvothermal process of cyclic and nitrogen-rich solvents, such as N-methyl-2-pyrrolidone (NMP) and dimethyl-imidazolidinone (DMEU), under mild conditions. The products exhibited strong light blue fluorescence, good cell permeability and low cytotoxicity. Moreover, after a facile post-thermal treatment, it developed a lotus seedpod surface-like structure of seed-like N-CDs decorating on the surface of carbon l… Show more

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Cited by 60 publications
(16 citation statements)
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“…The solvothermal treatment also leads to the attachment of solvent molecules and formation of oxygen‐containing functional groups on the bulk WO 3− x , which could create defects on WO 3− x sheets and serve as chemically reactive sites for incising WO 3− x into smaller sheets and then into QDs simultaneously. This is consistent with most of the top‐down strategies for QDs generation from bulk starting materials …”
Section: Resultssupporting
confidence: 87%
“…The solvothermal treatment also leads to the attachment of solvent molecules and formation of oxygen‐containing functional groups on the bulk WO 3− x , which could create defects on WO 3− x sheets and serve as chemically reactive sites for incising WO 3− x into smaller sheets and then into QDs simultaneously. This is consistent with most of the top‐down strategies for QDs generation from bulk starting materials …”
Section: Resultssupporting
confidence: 87%
“…To further reveal the ORR pathway and kinetics, Figure 7c shows the detailed polarization curves for GO-CQDs at different rotation speeds.C learly,o wing to the reduced diffusion at higher speeds, the catalytic current density increases as the rate of rotationi ncreases. [59] The Koutecky-Levich (K-L) curve showsagood linear relationship between the reciprocal of the current density (j À1 )a nd the reciprocal of the square root of the rotation rate (w À1/2 )a tt he potential of À0.30 to À0.70 Vi nF igure 7d.A dditionally,t he dissolved O 2 catalyzed by GO-CQDs is ap rimary reduction reaction( i.e.,O 2 is directly reduced to OH À in the presence of the catalyst GO-CQDs),a nd the n of the GO-CQDs is 3.05-3.72 (Figure 7e). Moreover, the Ta fel slope of GO-CQDs (118.6 mV dec À1 )i sl ower than the Tafel slopes of GO (440.5 mV dec À1 )a nd CQDs (150.2 mV dec À1 ;F igure 7f).…”
Section: Resultsmentioning
confidence: 99%
“…High‐resolution TEM (HRTEM) images (insets of Figure A–C) revealed that all the three kinds of BNQDs have good crystallinity with lattices of 0.21–0.22 nm, which agrees well with the (100) face of the BN crystal. [15a] In addition, control experiments were carried out to exclude the possibility of generating carbon nanodots (CNDs) from carbonization of solvents . 15 mL of pure solvents including ethanol, DMF, and NMP were added in different beaker (20 mL), respectively, and kept sonication for 3 h. Then the solvents were degassed with N 2 for 30 min to remove the oxygen, subsequently they were decanted into autoclave and under solvothermal treatment at 180 °C for 10 h in vacuum drying oven.…”
Section: Resultsmentioning
confidence: 99%