Palladium-decorated zinc sulfide/reduced graphene oxide nanocomposites for enhanced visible light-driven photodegradation of indigo carmine |
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| Affiliation: | 1. Department of Applied Chemistry, University of Johannesburg, DFC Campus, Johannesburg, 2028, South Africa;2. College of Engineering, Nanotechnology for Water Sustainability Research Unit, University of South Africa, Florida Campus, Johannesburg, South Africa;3. Nanotechnology and Application Centre, University of Allahabad, Allahabad 211002, India;1. Department of Radiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan;2. Department of Cardiology, Himeji Cardiovascular Center, 520 Kou, Saisho, Himeji, Hyogo, Japan;1. Physics Department, Abant Izzet Baysal University, 14280 Bolu, Turkey;2. Nuclear Radiation Detectors Research and Development Center, 14280 Bolu, Turkey;1. Escuela De Ingeniería Química, Universidad Del Valle, Cali-Valle Del Cauca A.A. 25360, Colombia;2. Department of Electrical Engineering, École De Technologie Supérieure, 1100 Notre-Dame Ouest, Montréal, Québec H3C 1K3, Canada;1. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Materials Synthesis and Characterization Laboratory, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;3. UiTM Negeri Sembilan, Kampus Kuala Pilah, Pekan Parit Tinggi, 72000 Kuala Pilah, Negeri Sembilan, Malaysia |
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| Abstract: | The removal of toxic organic pollutants from wastewater using reduced graphene oxide (rGO) based photocatalysts has dominated recent scientific research. As a result numerous nanomaterials have been studied and used for wastewater remediation. ZnS has been widely studied due to its versatile application in photocatalysis. This study presents the synthesis of a series of Pd-decorated ZnS/rGO nanocomposites by a coprecipitation method. The materials were characterized using Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM)–EDS, UV/visible spectrophotometry, and BET surface area analysis. Indigo carmine (IC) dye (20 ppm) was chosen as a model for organic pollutants and was used to evaluate the photocatalytic performance of the Pd–ZnS/rGO nanocomposites under simulated solar light with varying concentrations of Pd in the host material. Pd–ZnS/rGO showed significant visible light induced photocatalytic activity towards the degradation of IC. Highest photocatalytic activity was observed for the 1.0% Pd–ZnS/rGO sample (k=2.19×10−2 min−1). |
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| Keywords: | Photodegradation Palladium Reduced graphene oxide ZnS |
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