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. 2018 Jun 7;8(37):21020-21028.
doi: 10.1039/c8ra03404d. eCollection 2018 Jun 5.

Green synthesis of Pd nanoparticles supported on reduced graphene oxide, using the extract of Rosa canina fruit, and their use as recyclable and heterogeneous nanocatalysts for the degradation of dye pollutants in water

Saba Hemmati  1 , Lida Mehrazin  2 , Hedieh Ghorban  2 , Samir Hossein Garakani  2 , Taha Hashemi Mobaraki  2 , Pourya Mohammadi  1 , Hojat Veisi  1
Affiliations

Green synthesis of Pd nanoparticles supported on reduced graphene oxide, using the extract of Rosa canina fruit, and their use as recyclable and heterogeneous nanocatalysts for the degradation of dye pollutants in water

Saba Hemmati et al. RSC Adv. .

Erratum in

Expression of concern in

Abstract

The current study suggests a convenient synthesis of in situ, ecofriendly and well-dispersed palladium nanoparticles with narrow and small dimension distributions on a graphene oxide (GO) surface using a Rosa canina fruit extract as a stabilizer and reducing agent without the addition of any other stabilizers or surfactants. The as-synthesized nanocatalyst (Pd NPs/RGO) was assessed with XRD, UV-vis, FE-SEM, EDS, TEM, ICP and WDX. The obtained heterogeneous nanocatalyst showed catalytic performance for reducing 4-nitrophenol (4-NP), rhodamine B (RhB) and methylene blue (MB) at ambient temperature in an ecofriendly medium. The catalyst was retained by centrifugation and reused several times with no considerable change in its catalytic performance.

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Conflict of interest statement

There are no conflicts to declare.

Figures

Fig. 1
Fig. 1. Image of Rosa canina fruits.
Fig. 2
Fig. 2. UV-vis spectra of the GO and RGO.
Fig. 3
Fig. 3. (a) FE-SEM images of GO, and (b) Pd NPs/RGO.
Fig. 4
Fig. 4. EDX spectrum of Pd NPs/RGO.
Fig. 5
Fig. 5. FE-SEM image of Pd NPs/RGO and elemental maps of C, and Pd atoms.
Fig. 6
Fig. 6. TEM image of Pd NPs/RGO.
Fig. 7
Fig. 7. TEM image of Pd NPs/RGO with Pd NP size distributions.
Fig. 8
Fig. 8. XRD pattern of Pd NPs/RGO.
Fig. 9
Fig. 9. XPS spectrum related to the elemental survey scan of Pd NPs/RGO and in the Pd 3d region (inset).
Fig. 10
Fig. 10. The reduction of 4-NP in aqueous solution recorded every 5 s using the Pd NPs/RGO nanocomposite (1 mg) as a catalyst (a) ln(At/A0) versus reaction time for the reduction of 4-NP (b).
Fig. 11
Fig. 11. The reduction of MB in aqueous solution recorded every 10 s using the Pd NPs/RGO nanocomposite (1 mg) as a catalyst (a) ln(At/A0) versus reaction time for the reduction of MB (b).
Fig. 12
Fig. 12. The reduction of RhB in aqueous solution recorded every 15 s using the Pd NPs/RGO nanocomposite (1 mg) as a catalyst (a) ln(At/A0) versus reaction time for the reduction of RhB (b).
Fig. 13
Fig. 13. Reusability of the Pd NPs/RGO nanocatalyst for the reduction of MB, RhB and 4-NP in the presence of NaBH4.
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