In:
Journal of Nanoscience and Nanotechnology, American Scientific Publishers, Vol. 21, No. 3 ( 2021-03-01), p. 1507-1516
Kurzfassung:
In this study, graphene oxide (GO) sheets were successfully synthesized using two routes: conventional Hummers' (HGO) and modified Hummers' (or Marcano's) (MGO) methods. GO sheets were then assembled with TiO 2 nanoparticles to form nanocomposites (i.e., HGO–TO and MGO–TO).
The properties of HGO and MGO and their nanocomposites with TiO 2 were evaluated by Fouriertransform infrared (FTIR), Raman, ultraviolet-visible (UV-Vis) adsorption, and diffuse reflectance (DRS) spectroscopies, X-ray diffraction (XRD), and thermal gravimetric analysis (TGA). The
specific surface area, pore volume, and pore size of MGO, determined by Brunauer-Emmett-Teller (BET) equation, were 565 m 2 g −1 , 376 cm 3 g −1 , and 30 nm, respectively; all of these parameters decreased after MGO was combined with TiO 2 .
In addition, compared with HGO, MGO possessed higher oxidation level and more stable bonding with TiO 2 nanoparticles. The morphology of HGO and MGO, which were characterized by scanning electron (SEM) and transmission electron microscopies (TEM), together with energy-dispersive X-ray (EDX) spectroscopy and elemental mapping technique, was determined to consist of TiO 2 nanoparticle-assembled GO sheets. All GO–TiO 2 nanocomposite samples exhibited a very high activity (˜100%) toward rhodamine B (RhB) dye photodegradation under natural
sunlight exposure within 60 min. The obtained results for the GO–TiO 2 nanocomposite showed the potential of its application in wastewater purification and other environmental aspects.
Materialart:
Online-Ressource
ISSN:
1533-4880
DOI:
10.1166/jnn.2021.19076
Sprache:
Englisch
Verlag:
American Scientific Publishers
Publikationsdatum:
2021
SSG:
11
