Graphene quantum dots (GQDs) from organic acids

An environmentally eco-friendly method of synthesis of graphene quantum dots (GQDs) was reported using pyrolysis of organic acids, viz., tartaric acid and ascorbic acid at 150-160 °C, which produce (GQDs) in the presence of NaOH. The heating time and effect of different pH on the formation of GQDs have been studied in detail to optimize the reaction conditions. The UV-visible absorption and normalized fluorescence spectra have been applied to analyze the optical and luminescent properties of GQDs. The particles size distribution of the GQDs obtained from different organic acids at different pH has been also determined. The microstructures and surface morphology have been studied by atomic force microscope (AFM)

Preparation of One-dimensional (1D) Cu-WO3 Nanorods Catalyst for the Selective Oxidation of Ethylbenzene

We present here a facile hydrothermal synthesis method to prepare Cu (II) nanoparticles supported on W (VI) oxide nanorod catalyst. Detailed characterization of the material was carried out by XRD, XPS, SEM, TEM, TGA, and ICP-AES. The catalyst was highly active for selective oxidation of ethylbenzene to acetophenone with H2O2 at 90 ºC. The influence of reaction parameters were investigated in detail. The reusability of the catalyst was studied and it was found that the catalyst did not show any significant activity loss even after 5 reuses. An ethylbenzene conversion of 86.5% with 100% acetophenone selectivity was achieved over this catalyst at 90 ºC

Graphene quantum dots (GQDs) from organic acids

128-134An environmentally eco-friendly method of synthesis of graphene quantum dots (GQDs) was reported using pyrolysis of organic acids, viz., tartaric acid and ascorbic acid at 150-160 °C, which produce (GQDs) in the presence of NaOH. The heating time and effect of different pH on the formation of GQDs have been studied in detail to optimize the reaction conditions. The UV-visible absorption and normalized fluorescence spectra have been applied to analyze the optical and luminescent properties of GQDs. The particles size distribution of the GQDs obtained from different organic acids at different pH has been also determined. The microstructures and surface morphology have been studied by atomic force microscope (AFM)