Facile hydrothermal synthesis of carbon nanoparticles and possible application as white light phosphors and catalysts for the reduction of nitrophenol

Rapid reduction of GO by hydrogen spill-over mechanism by in situ generated nanoparticles at room temperature and their catalytic performance towards 4-nitrophenol reduction and ethanol oxidation

“…In general, 4-NP shows UV-vis absorbance peak at around 317 nm, and the peak was sifted to a strong absorption at 400 nm with the addition of excess NaBH 4 in the reactant, colour changes from pale yellow to dark yellowish green due formation of 4-nitrophenolate ion (Fig. 4A) [45][46][47][48][49][50]. The reduction of 4-NP was not possible by NaBH 4 only and there was no change in the absorbance spectra even up to 1 h (Fig.…”

“…The completeness of reduction is confirmed as the 400 nm peak (absorbance peak corresponding to 4-NP) disappears and the 297 nm peak (absorbance peak corresponding to 4-NP) appears followed by the change of the colour from greenish yellow to colourless. The four isosbestic points (at 224, 244, 281 and 313 nm) indicate the clean conversion process without any by-product formation [48][49][50]. Fig.…”

From highly graphitic to amorphous carbon dots: A critical review

“…Solvothermal approaches, such as the high pressure hydrothermal fragmentation of sucrose, afford the ring opening of the hydrolyzed compounds, formation of dehydrated furfural compounds, followed by hydronium-catalyzed polymerization and carbonization toward gC-dots. 18 Alternatively, gC-dots were produced via laser ablation of graphite powders followed by HNO 3 oxidation, but the resultant nanoparticles became photoactive only after surface passivation with amine-terminated oligomers or polymers. 19 gC-dots consisting of 1-3 layers are derived by chemical oxidation and cutting of micrometer-sized carbon fi bers, 20 exfoliation and disintegration of graphitic fl akes and CNTs, 21 and hydrothermal breakdown of preoxidized graphite sheets.…”

An efficient on-board metal-free nanocatalyst for controlled room temperature hydrogen production

“…As shown in the figure, a broad peak near 26.3° was found for all of the CNDs which corresponds the (002) plane of graphitic carbon. 33 Raman spectra of the as-prepared CNDs are shown in Fig. 1b.…”