title: Preparation of ZnS-graphene nanocomposites under electric furnace and photocatalytic degradation of organic dyes.
abstract: Zinc sulfide (ZnS) nanoparticles were synthesized from zinc nitrate hexahydrate and thiourea under microwave irradiation. The ZnS-graphene nanocomposites were calcined in an electric furnace at 700 degrees C under an inert argon gas atmosphere for 2 hr. The heated ZnS-graphene nanocomposites were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and UV-vis spectrophotometry. After heat treatment, ZnS-graphene nanocomposites had a more porous and larger surface area, than the unheated ZnS-graphene nanocomposites. The photocatalytic activity of the heated ZnS-graphene nanocomposites in the degradation of organic dyes, such as methylene blue, methyl orange, and rhodamine B, under ultraviolet light at 254 nm by UV- vis spectrophotometer was evaluated and compared with that of the unheated ZnS nanoparticles, heated ZnS nanoparticles, unheated ZnS-graphene nanocomposites. Among the our experimental results as a photocatalyst, the heated ZnS-graphene nanocomposites exhibited remarkably higher photocatalytic degradation of organic dyes as compared to other nanomaterials such as unheated ZnS nanoparticles and heated ZnS-graphene nanocomposites.
authors.forename: Hae Soo
authors.initials: HS
authors.lastname: Park
authors.forename: Weon Bae
authors.initials: WB
authors.lastname: Ko
mesh_terms: D001391:Azo Compounds / Q000032:analysis / Q000737:chemistry; D002384:Catalysis; D004396:Coloring Agents / Q000032:analysis* / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D007220:Industrial Waste; D008751:Methylene Blue / Q000032:analysis / Q000737:chemistry; D053761:Nanocomposites / Q000737:chemistry*; D036103:Nanotechnology; D013056:Spectrophotometry, Ultraviolet; D013440:Sulfides / Q000737:chemistry*; D013783:Textile Industry; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D007220:Industrial Waste; D013440:Sulfides; D017967:Zinc Compounds; C100258:methyl orange; D006108:Graphite; C031238:zinc sulfide; D008751:Methylene Blue