Hydroxyl-/Carboxyl-Rich Graphitic Carbon Nitride/Graphene Oxide Composites for Efficient Photodegradation of Reactive Red 195 and Antibacterial Applications.

In this work, a protonated graphitic carbon nitride (P-g-CN)-coated graphene oxide (GO) composite (GO/P-g-CN) was prepared via wet-chemistry exfoliation, followed by a freeze-drying process. The GO/P-g-CN composite was found to have an outstanding photodegradation performance effect on the reactive red 195 (RR195) dye and very strong antibacterial properties. Both the GO structure and the dispersed state of P-g-CN were found to play a significant role in enhancing the photocatalytic activity of GO/P-g-CN.

Sub-20-nm anatase TiO anchored on hollow carbon spheres for enhanced photocatalytic degradation of reactive red 195.

Herein, hollow carbon sphere (HCS)-supported titanium dioxide (TiO) nanoparticles (sub-20-nm; HCS@TiO)-based composites are rationally designed and fabricated via a facile wet-chemistry strategy. The introduction of an HCS, which acts as a conductive substrate, improves the separation efficiency of photogenerated hole/electron pairs (h/e) from TiO because photogenerated electrons are transferred to conductive carbon skeleton. Due to the three-dimensional spherical structure and excellent hydrophilicity of the carbon skeletons, low-density HCS with outstanding conductivity not only accelerate the separation of photogenerated h/e pairs from TiO but also improve the adsorption performance of the soluble reactive red 195 molecules (RR195) on the surface of TiO nanoparticles.