Preconcentration and trace determination of copper (II) in Thai food recipes using Fe 3 O 4 @Chi–GQDs nanocomposites as a new magnetic adsorbent

Co3O4/NiO@GQD@SO3H nanocomposite as a superior catalyst for the synthesis of chromenpyrimidines

“…These results demonstrate that the magnetization property decreased by coating and functionalization. 39,40 The FT-IR spectra of Co 3 O 4 /NiO, Co 3 O 4 /NiO@N-GQD and Co 3 O 4 /NiO@GQD@SO 3 H nanocomposite are shown in Fig. 5.…”

An Overview of Surface‐Functionalized Magnetic Nanoparticles: Preparation and Application for Wastewater Treatment

“…Limchoowong et al. introduced quantum dots onto the chitosan‐modified Fe 3 O 4 and obtained a new magnetic chitosan‐graphene quantum dots (Fe 3 O 4 @Chi‐GQDs) nanocomposite . The Fe 3 O 4 @Chi‐GQDs exhibited high adsorption capacity of Cu 2+ which was ascribed to electrostatic interactions and/or surface complex formation through covalent coordinate binding.…”

A fluorescence switching sensor based on graphene quantum dots decorated with Hg2+ and hydrolyzed thioacetamide for highly Ag+-sensitive and selective detection

“…The GQDs were prepared from citric acid by a pyrolysis method with a modied procedure. [12][13][14] Briey, 2.0 g of citric acid was added into a 250 mL beaker. The beaker was heated to 200 C using a paraffin oil bath for about 5 min.…”

“…They were discovered very recently as a class of zero-dimensional graphitic nanomaterials with lateral dimensions less than 100 nm, and they have either a single layer, double layers, or a few layers (3 to <10). 12,13 Compared with organic dyes and semiconductive quantum dots (QDs), GQDs are superior in terms of their excellent properties, such as their high photostability against photobleaching and blinking, biocompatibility and low toxicity. 15 Moreover, similar to graphene, GQDs have excellent characteristics such as large surface areas, large diameters, ne surface graing via the p-p conjugated network or surface groups, and other special physical properties.…”