Aggregation of reduced graphene oxide and its nanohybrids with magnetite and elemental silver under environmentally relevant conditions.

ABSTRACT: The aggregation and long-term (25 d) sedimentation behaviors of reduced graphene oxide (RGO) and its three successively self-assembled nanohybrids with magnetite (Fe₃O₄) and zerovalent silver (Ag⁰) nanoparticles have been investigated. The aggregation behaviors of the nanomaterials in NaCl and CaCl₂ were found to be in good agreement with the Derjaguin-Landau-Verwey-Overbeek (DLVO)-type interactions and the Schulze-Hardy rule. The colloidal stability decreased with the increasing ratios of the edge-based functional groups (COO^- and C=O) to the total oxygen-containing functional groups decorated on the basal planes (C-O) and edges of RGO, as quantified by X-ray photoelectron spectroscopy analysis. In the presence of natural organic matt

SUBMITTER: Park CM 

PROVIDER: S-EPMC6781226 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature