Multifunctional graphene oxide-TiO₂-Ag nanocomposites for high performance water disinfection and decontamination under solar irradiation.
Multifunctional nanocomposites (GO-TiO2-Ag) integrating 2D GO sheets, 1D TiO2 nanorods and 0D Ag nanoparticles were synthesized via a facile two-phase method and characterized by various analytical techniques including TEM, EDS and XRD. The GO-TiO2-Ag nanocomposites demonstrate remarkably enhanced photocatalytic activities in degrading AO 7 and phenol under solar irradiation compared with GO-TiO2 and GO-Ag. They also exhibit excellent intrinsic antibacterial activity toward Escherichia coli, as well as significantly enhanced photo-biocidal capability over GO-TiO2 and GO-Ag. Through systematically investigating the influence of Ag content in the nanocomposites for their photocatalytic activities, it indicates that the optimal Ag content in the GO-TiO2-Ag nanocomposites varies for dye degradation and for phenol/bacterial degradation with different mechanisms. The superior photocatalytic activities under solar irradiation and the easy recovery make the GO-TiO2-Ag nanocomposites a good promising candidate for water purification.
School of Civil & Environmental Engineering, Nanyang Technological University, Singapore 639798, Singapore.
Lei
L
Liu
Hongwei
H
Bai
Jincheng
J
Liu
Darren D
DD
Sun
D001391:Azo Compounds / Q000737:chemistry; D001557:Benzenesulfonates / Q000737:chemistry; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry; D004203:Disinfection / Q000379:methods; D004926:Escherichia coli / Q000187:drug effects; D006108:Graphite / Q000737:chemistry* / Q000528:radiation effects; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D053761:Nanocomposites / Q000737:chemistry / Q000528:radiation effects; D043942:Nanotubes / Q000737:chemistry* / Q000528:radiation effects; D010087:Oxides / Q000737:chemistry* / Q000528:radiation effects; D019800:Phenol / Q000737:chemistry; D010782:Photolysis; D012834:Silver / Q000737:chemistry* / Q000528:radiation effects; D013472:Sunlight; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D014873:Water Pollutants / Q000737:chemistry; D018508:Water Purification / Q000379:methods
D001391:Azo Compounds; D001557:Benzenesulfonates; D004396:Coloring Agents; D010087:Oxides; D014873:Water Pollutants; C009495:titanium dioxide; D019800:Phenol; D012834:Silver; D006108:Graphite; D014025:Titanium; C014722:2-naphthol orange
Ag nanoparticles; Graphene oxide; Photocatalyst; TiO(2) nanorods; Water purification