Efficient removal of herbicide 2,4-dichlorophenoxyacetic acid from water using Ag/reduced graphene oxide co-decorated TiO2 nanotube arrays.
A new photocatalyst, Ag nanoparticles (NPs) and reduced graphene oxide (RGO) co-decorated TiO(2) nanotube arrays (NTs) (Ag/RGO-TiO(2) NTs), was designed and facilely produced by combining electrodeposition and photoreduction processes. The structures and properties of the photocatalysts were characterized. The ternary catalyst exhibited almost 100% photocatalytic removal efficiency of typical herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) from water under simulated solar light irradiation. The photodegradation rate toward 2,4-D over Ag/RGO-TiO(2) NTs is 11.3 times that over bare TiO(2) NTs. After 10 successive cycles with 1600 min of irradiation, Ag/RGO-TiO(2) NTs maintained as high 2,4-D removal efficiency as 97.3% with excellent stability and easy recovery, which justifies the photocatalytic system a promising application for herbicide removal from water.
State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, PR China.
Yanhong
Y
Tang
Shenglian
S
Luo
Yarong
Y
Teng
Chengbin
C
Liu
Xiangli
X
Xu
Xilin
X
Zhang
Liang
L
Chen
D015084:2,4-Dichlorophenoxyacetic Acid / Q000302:isolation & purification* / Q000528:radiation effects; D000327:Adsorption; D002384:Catalysis; D006108:Graphite / Q000737:chemistry* / Q000528:radiation effects; D006540:Herbicides / Q000302:isolation & purification* / Q000528:radiation effects; D008027:Light; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D043942:Nanotubes / Q000737:chemistry* / Q000528:radiation effects; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry; D055668:Photochemical Processes; D012834:Silver / Q000737:chemistry* / Q000528:radiation effects; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D014874:Water Pollutants, Chemical / Q000302:isolation & purification* / Q000528:radiation effects; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
D006540:Herbicides; D010087:Oxides; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D015084:2,4-Dichlorophenoxyacetic Acid; D012834:Silver; D006108:Graphite; D014025:Titanium