Reduced graphene oxide–metal/metal oxide composites: Facile synthesis and application in water purification

Nanocomposites of graphene oxide, Ag nanoparticles, and magnetic ferrite nanoparticles for elemental mercury (Hg0) removal

“…Taking advantage of the abundant functional groups and large surface areas, various functionalized GO composites, such as polypyrrole-reduced GO (RGO), RGO-MnO 2 , RGO-Ag and RGO-SnO 2 composites, have been developed for removal of Hg 2+ in water treatment and detection of Hg 2+ . 21,22 Metal and metal oxide nanoparticles were among the most intensively studied Hg 0 adsorbents in previous studies. [23][24][25] In particular, noble metal nanoparticles, such as silver and gold, are the most intriguing ones, 20,24,26,27 which can efficiently capture mercury vapour by forming Ag-Hg or Au-Hg amalgam at temperatures close to ue gas conditions and can be regenerated by release of captured mercury through thermal treatment, providing a feasible way to regenerate mercury adsorbents.…”

Environmental applications using graphene composites: water remediation and gas adsorption

“…This is due to the two-dimensional layer structure, large surface area, pore volume and presence of surface functional groups in these materials. [27][28][29][30][31] The inorganic nanoparticles present in 2D graphene nanocomposites prevent graphene aggregation, as such a high surface area and pore volume can be maintained. 3D reduced graphene oxide (rGO) composite materials have also been employed as adsorbents for water purication; these materials have been shown to be effective in the removal of dyes as well as other organic contaminants.…”

“…42 Sreeprasad et al synthesized rGO-metal/metal oxide composites using a redox-like reaction between GO and the metal precursors. 27 They reported that the model compounds Ag-rGO and MnO 2 -rGO, which were either supported or unsupported on river sand, were highly effective in the removal of Hg(II) from water. Recently, Lee and Yang have shown that TiO 2 decorated on GO can be used in the effective removal of the heavy metal cations Zn(II), Cd(II) and Pb(II).…”

Removal of Pollutants from Water/Waste Water Using Nano-Adsorbents: A Potential Pollution Mitigation

“…Graphene is a flat, sp2-hybridized, two-dimensional honeycomb arrangement of carbon atoms with single carbon atom thickness (Park and Ruoff, 2009). Features like large surface area and presence of surface functional groups make them attractive adsorbent candidates for water purification (Sreeprasad et al, 2011). RGO-magnetite and GO-ferric hydroxide composites were used for the removal of arsenic from water (Chandra et al, 2010;.…”