A comparative study on the effects of ultrathin luminescent graphene oxide quantum dot (GOQD) and graphene oxide (GO) nanosheets on the interfacial interactions and mechanical properties of an epoxy composite

Manganese(ii) enhanced fluorescent nitrogen-doped graphene quantum dots: a facile and efficient synthesis and their applications for bioimaging and detection of Hg2+ ions

“…The bands at 1258 cm À1 and 1078 cm À1 were attributed to the stretching vibrations of O-H and C-O-C, respectively. 16,38,39 The small peaks at 1495 cm À1 and 1449 cm À1 corresponded to the NH 3 + symmetric bending and C-N stretching vibration, respectively, 39,40 which conrmed that nitrogen atoms have been successfully doped into the Mn(II)-NGQDs and NG. However, compared to NG, the C-O stretching vibration at 1078 cm À1 and NH 3 + symmetric bending at 1495 cm À1 in Mn(II)-NGQDs disappear, indicating the existence of Mn 2+ ions which have bonded to the NG.…”

Graphene Oxide: Graphene Quantum Dot Nanocomposite for Better Memristic Switching Behaviors

“…The strong C=O peak at around 1710 cm −1 was a result of stretching vibrations of carboxylic acid and carbonyl moieties, which decreased with the incremental content of GQDs. These clearly indicated that through COO bonding, GQDs were well attached to the GO surface [35]. The FTIR observation confirmed the production of GO:GQDs nanocomposite formation.…”

The development of a ternary nanocomposite for the removal of Cr(vi) ions from aqueous solutions

“…hydroxyl, carboxyl and epoxy groups. 11,12 In addition, silver nanoparticles (Ag NPs) are antimicrobial, non-toxic, chemically stable and have a high surface-to-volume ratio. Recent advances in the synthesis of Ag NPs have been achieved through various studies related to the use of Ag NPs for the removal of heavy metals and catalysis.…”