Abstract
In this work, silver nanoparticle- (AgNP-) embedded graphene oxide- (GO-) TiO2 nanotube (TNT) nanocomposite (labelled GAT) was successfully synthesized by gamma ray radiolysis. The influence of irradiation process, including one-step and two-step assistances and at different irradiation doses (5, 10, 15, 20, and 25 kGy), on the GAT’s physicochemical properties was achieved. Structure and properties of irradiated materials were analyzed by Fourier-transformed infrared (FT-IR), ultraviolet-visible absorption (UV-Vis), and Raman spectroscopies; X-ray diffraction (XRD); and scanning electron (SEM) and transmission electron (TEM) microscopies. In addition, selective scavengers of e-aq and ⋅OH radicals were used to investigate the radiolytic synthesis of GAT nanocomposite. It was revealed that gamma ray irradiation could strongly support the relation of the composite synthesis. Furthermore, the synthesized GAT nanocomposites showed a significant effect for Rhodamine B (RhB) photodecomposition after 60 minutes of natural sunlight exposure and evaluation by UV-Vis absorption spectroscopy. Briefly, the obtained results highlighted the potential of gamma irradiation as a “clean” and controllable way for synthesizing beneficial nanocomposite materials for wastewater purification and other environmental aspects.
Highlights
Gamma ray irradiation is among the physical methods widely applied for the synthesis of different sorts of metallic nanoparticles [1,2,3]
Gamma ray irradiation-assisted synthesis of different types of materials have been studied, which reinforced the high potential of this technique to be widely applied in advanced materials synthesis
Postirradiated Graphene Oxide-Silver Nanoparticles-TiO2 Nanotube Nanocomposite (GAT) nanocomposites at different doses were obtained as dark brown solutions (Figure 4)
Summary
Gamma ray irradiation is among the physical methods widely applied for the synthesis of different sorts of metallic nanoparticles [1,2,3]. Gamma ray irradiation was demonstrated to be controllable, its conformability for instantaneous and homogenous synthesis of metallic nanoparticles [2]. Gamma ray irradiation-assisted synthesis of different types of materials (zeolite [7], thin films [8, 9], minerals [10], hydrogels [11], membranes [12], as well as many others [13, 14]) have been studied, which reinforced the high potential of this technique to be widely applied in advanced materials synthesis
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