Highly porous activated carbon materials from carbonized biomass with high CO2 capturing capacity

A simple hydrothermal method was applied to prepare carbon nanodots (C dots) from o-phenylenediamine (OPD). The C dots exhibit photoluminescence at 567 nm when excited at 420 nm. In the presence of Cu2+ ions, the colour of C dots changes from yellow to orange, with an increased PL intensity as a result of the formation of Cu(OPD)2 complexes on the surfaces of C dots. The D-band to G-band ratios of C dots in the absence and presence of 80 nM Cu2+ ions are 1.31 and 4.75, respectively. The C dots allow the detection of Cu2+ ions with linearity over a concentration range of 2–80 nM, with a limit of detection of 1.8 nM at a signal-to-noise ratio of 3. The cell viability values of A549, MCF-10A, and MDA-MB-231 cells treated with 3 μg mL−1 of C dots are all greater than 99%, showing their great biocompatibility. Having great water dispersibility, photostability, chemical stability (against NaCl up to 0.5 M), great selectivity, and biocompatibility, the C dots have been employed for the localization of Cu2+ ions in the cancer cells (A549 cells) treated with 10 μM Cu2+ ions.

Carbon nanodots prepared from o-phenylenediamine for sensing of Cu2+ ions in cells

Sustainable activated carbons from dead ginkgo leaves for supercapacitor electrode active materials

Thermal and structure analysis on reaction mechanisms during the preparation of activated carbon fibers by KOH activation from liquefied wood-based fibers

Biomass pyrolysis for nitrogen-containing liquid chemicals and nitrogen-doped carbon materials

Nitrogen-enriched waste medium density fiberboard-based activated carbons as materials for supercapacitors

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Nitrogen-enriched waste medium density fiberboard-based activated carbons as materials for supercapacitors