Au nanoparticles decorated on magnetic nanocomposite (GO-Fe3O4/Dop/Au) as a recoverable catalyst for degradation of methylene blue and methyl orange in water

Esmaeili, Neda; Mohammadi, Pourya; Abbaszadeh, Mehdi; Sheibani, Hassan

doi:10.1016/j.ijhydene.2019.07.025

Cited by 51 publications

(13 citation statements)

References 55 publications

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“…According to the literature 61 , the plausible mechanism for the reduction of MO and RhB in the presence of SGCN/Fe 3 O 4 /PVIs/Pd can be defined as follow: First, borohydride ions are generated through dissociation of sodium borohydride. Secondly, the as-generated BH 4 − ions are adsorbed on Pd nanoparticles that are the main catalytic species for the reduction reaction.…”

Section: Resultsmentioning

confidence: 99%

Pd on poly(1-vinylimidazole) decorated magnetic S-doped grafitic carbon nitride: an efficient catalyst for catalytic reduction of organic dyes

Dorraj

Sadjadi

Heravi

2020

Sci Rep

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A novel magnetic catalyst, (SGCN/Fe 3 O 4 /PVIs/Pd) was synthesized by growing of poly(1-vinylimidazole) on the surface of ionic liquid decorated magnetic S-doped graphitic carbon nitride, followed by stabilization of palladium nanoparticles. Catalytic activity of the prepared heterogeneous catalyst was explored for the catalytic reduction of hazardous dyes, methyl orange and Rhodamine B, in the presence of NaBH 4 . Besides, the effects of the reaction variables on the catalytic activity were investigated in detail. The kinetics study established that dye reduction was the first order reaction and the apparent activation energy was calculated to be 72.63 kJ/mol and 68.35 kJ/mol 1 for methyl orange and Rhodamine B dyes, respectively. Moreover, ΔS # and ΔH # values for methyl orange were found to be − 33.67 J/mol K and 68.39 kJ/mol respectively. These values for Rhodamine B were − 45.62 J/mol K and 65.92 kJ/mol. The recycling test verified that the catalyst possessed good stability and reusability, thereby making it a good candidate for the catalytic purposes. Furthermore, a possible catalytic mechanism for dye catalytic reduction over SGCN/Fe 3 O 4 /PVIs/Pd was proposed.

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Section: Resultsmentioning

confidence: 99%

Pd on poly(1-vinylimidazole) decorated magnetic S-doped grafitic carbon nitride: an efficient catalyst for catalytic reduction of organic dyes

Dorraj

Sadjadi

Heravi

2020

Sci Rep

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“…Considering the previous reports, [ 26,46 ] the proposed mechanism of MNPs/Hal‐POSS‐HEMA‐Pd‐assisted dye degradation can be explained as follows: In the onset, NaBH 4 dissociated to generate borohydride ions, which were adsorbed on MNPs/Hal‐POSS‐HEMA‐Pd surface (Figure 12). Apart from borohydride ions, RhB or MO is also adsorbed through non‐covalent interactions such as π–π stacking.…”

Section: Resultsmentioning

confidence: 82%

“…This can simplify the recovery of the catalyst and improve its recyclability. [ 26 ] On the other hand, depending on the features of the support, the efficiency of the catalytic process can be enhanced.…”

Section: Introductionmentioning

confidence: 99%

Pd on magnetic hybrid of halloysite and POSS‐containing copolymer: An efficient catalyst for dye reduction

Sadjadi

Koohestani

Atai

2020

Applied Organom Chemis

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A novel catalytic nanocomposite, MNPs/Hal‐POSS‐HEMA‐Pd, composed of halloysite nanoclay and polyhedral oligomeric silsesquioxane is reported. To synthesize the catalyst, magnetic halloysite was vinyl functionalized and then polymerized with 2‐hydroxyethyl methacrylate and methacrylate polyhedral oligomeric silsesquioxane. Afterwards, the latter was palladated to furnish a heterogeneous catalyst with use for catalyzing the reductive degradation of organic dyes, Rhodamine B, and methyl orange with NaBH4. The kinetic and thermodynamic parameters of both reactions were estimated. The results asserted that low content of the catalyst could catalyze the dye reduction reactions to furnish hydrogenated product in quantitative conversion in a very short reaction times (1 min). It is assumed that both halloysite and polyhedral oligomeric silsesquioxane can contribute to the anchoring of Pd nanoparticles. On the other hand, the polymeric network around halloysite can furnish a microenvironment for bringing dyes in the vicinity of active sites. Moreover, unique tubular morphology of halloysite can effectively improve dye adsorption and consequently enhance dye reduction. Additionally, the study of the recyclability of the catalyst approved that it could be magnetically recovered and reused for ten successive reaction runs with trivial leach of Pd (2 wt.%) and decrement of the catalytic activity.

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“…Graphene oxide (GO) was synthesized in accordance with the Hummers method using the commercially obtained graphite [34,35]. Next, prepared GO was converted to reduced graphene oxide (rGO) through a chemical procedure.…”

Section: Preparation Of Reduced Graphene Oxide (Rgo)mentioning

confidence: 99%

“…Herein, in continuation of our previous works [32][33][34][35][36], a novel approach is employed to fabricate rGO-dithiooxamide/Au hybrid nanocatalyst. Graphene oxide (GO) was synthesized using graphite and chemically converted to reduced graphene oxide (rGO).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of functionalized reduced graphene oxide upgraded with gold nanoparticles as a hybrid nanocatalyst for the solvent-free oxidation of cyclohexene by molecular oxygen

Seyedi¹,

Nejad²,

Saidi³

et al. 2020

Comptes Rendus. Chimie

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Au nanoparticles decorated on magnetic nanocomposite (GO-Fe3O4/Dop/Au) as a recoverable catalyst for degradation of methylene blue and methyl orange in water

Cited by 51 publications

References 55 publications

Pd on poly(1-vinylimidazole) decorated magnetic S-doped grafitic carbon nitride: an efficient catalyst for catalytic reduction of organic dyes

Pd on poly(1-vinylimidazole) decorated magnetic S-doped grafitic carbon nitride: an efficient catalyst for catalytic reduction of organic dyes

Pd on magnetic hybrid of halloysite and POSS‐containing copolymer: An efficient catalyst for dye reduction

Evaluation of functionalized reduced graphene oxide upgraded with gold nanoparticles as a hybrid nanocatalyst for the solvent-free oxidation of cyclohexene by molecular oxygen

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