Silver and zinc oxide decorated on reduced graphene oxide: Simple synthesis of a ternary heterojunction nanocomposite as an effective visible-active photocatalyst. (19th September 2022)

• Record Type: Journal Article
• Authors: Abdulhusain, Zaid Hamzah; Alshamsi, Hassan Abbas; Salavati-Niasari, Masoud
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 80(2022)
• Page Start: 34036
• Page End: 34047
• Publication Date: 2022-09-19
• Subjects: Photocatalyst -- Ternary nanocomposite -- Ag-ZnO-RGO -- Hydrothermal -- Nanostructures; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.08.018
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Ternary nanocomposites of Ag-ZnO-rGO were prepared through an in-situ hydrothermal process in presence of 1, 8-diamino-3, 6-dioxaoctan (DDO). It was tried to result homogeneous fine particles by changing the effective parameters. Then, photocatalytic performance of the optimized sample was investigated by removing Rhodamine B (RhB) dye as an organic pollutant. Next, the photocatalytic efficiency was optimized by two operational parameters: concentration of dye and pH of solution. On the other sides, the results showed that the silver content amount in the composite can affect the photocatalytic yield. Therefore, ideal efficiency (98.92%) was obtained when the concentration of RhB solution was 10 ppm and pH was adjusted to 11, in the presence of Ag-ZnO-rGO nanocomposite with a silver content of about 5%. According to the findings, DDO can be considered an important agent for the synthesis of Ag-ZnO-rGO nanocomposite which should be used as a photocatalyst. Highlights: Ag-ZnO-rGO nanocomposite shows higher efficiency of 98.92 in the RhB degradation. Ag-ZnO-rGO was found to be stable with 93.70% dye removal even after 10 runs. DDO plays three roles as capping agent, alkaline agent, and reducing agent during the reaction. Band gap of nanocomposite changes inversely with Ag amount. Absorption of hydroxyl groups on the photocatalyst surface increases cationic dye degradation.