title: Ammonia-modified graphene sheets decorated with magnetic Fe3O4nanoparticles for the photocatalytic and photo-Fenton degradation of phenolic compounds under sunlight irradiation.
abstract: Synthesis of easily separable and eco-friendly efficient catalyst with both photocatalytic and photo-Fenton degradation properties is of great importance for environment remediation application. Herein, ammonia-modified graphene (AG) sheets decorated with Fe3O4nanoparticles (AG/Fe3O4) as a magnetically recoverable photocatalyst by a simple in situ solution chemistry approach. First, we have functionalized graphene oxide (GO) sheets by amide functional group and then Fe3O4nanoparticles (NPs) are doped onto the functionalized GO surface. The AG/Fe3O4nanocomposite showed efficient photocatalytic activity towards degradation of phenol (92.43%), 2-nitrophenol (2-NP) (98%) and 2-chlorophenol (2-CP) (97.15%) within 70-120min. Consequently, in case of photo-Fenton degradation phenomenon, 93.56% phenol, 98.76% 2-NP and 98.06% of 2-CP degradation were achieved within 50-80min using AG/Fe3O4nanocomposite under sunlight irradiation. The synergistic effect between amide functionalized graphene and Fe3O4nanoparticles (NPs) enhances the photocatalytic activity by preventing the recombination rate of electron-hole-pair in Fe3O4NPs. Furthermore, the remarkable reusability of the AG/Fe3O4nanocomposite was observed up to ten cycles during the photocatalytic degradation of these phenolic compounds.
authors.affiliation: Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, India; Academy of Scientific and Innovative Research (AcSIR), India.
authors.forename: Purna K
authors.initials: PK
authors.lastname: Boruah
authors.affiliation: Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, India.
authors.forename: Bhagyasmeeta
authors.initials: B
authors.lastname: Sharma
authors.affiliation: Academy of Scientific and Innovative Research (AcSIR), India; Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune-11008, Maharashtra, India.
authors.forename: Indrapal
authors.initials: I
authors.lastname: Karbhal
authors.affiliation: Academy of Scientific and Innovative Research (AcSIR), India; Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune-11008, Maharashtra, India.
authors.forename: Manjusha V
authors.initials: MV
authors.lastname: Shelke
authors.affiliation: Advanced Materials Group, Materials Sciences and Technology Division, CSIR-North East Institute of Science & Technology, Jorhat 785006, India; Academy of Scientific and Innovative Research (AcSIR), India. Electronic address: mnshrdas@yahoo.com.
authors.forename: Manash R
authors.initials: MR
authors.lastname: Das
keywords: 2-chlorophenol; 2-nitrophenol; Fe(3)O(4) nanoparticle; Graphene; Phenol; Photo-Fenton degradation; Photodegradation