Fast and efficient single step synthesis of modified magnetic nanocatalyst for catalytic reduction of 4-nitrophenol

Saxena, Megha; Saxena, Reena

doi:10.1016/j.matchemphys.2021.125437

Cited by 12 publications

(6 citation statements)

References 36 publications

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“…On the other hand, a reaction time of 9 and 6 min is necessary if a catalyst amount of 20 and 25 mg is used, respectively. The authors showed that the temperature has an impact on the catalytic reduction as well: when an amount of 20 mg of catalyst is used, and the temperature is raised from 25 to 55 • C, the rate of catalysis increases while the time required for catalysis decreases from 9 to 4 min [67].…”

Section: Reduction Of 4-np To 4-ap Using Synthesized Materialsmentioning

confidence: 99%

Effect of the Preparation Conditions on the Catalytic Properties of CoPt for Highly Efficient 4-Nitrophenol Reduction

et al. 2022

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CoPt alloys with Pt contents from 15 to 90% were prepared using low-cost electrochemical deposition. Different samples were synthesized from electrochemical baths at pH = 2.5 and 5.5 in a solution with and without saccharin as an additive. The morphology, composition and crystalline structure of the as-prepared samples were investigated by High Resolution—Scanning Electron Microscopy (HR-SEM), Atomic Force Microscopy (AFM), Ultra-high Resolution—Transmission Electron Microscopy (UHR-TEM), Energy-Dispersive X-ray Spectroscopy (EDX), and X-ray Diffraction (XRD). XRD investigations revealed that fcc crystalline structure transforms into hcp crystalline structure when the pH of the electrochemical bath is increased from 2.5 to 5.5 as well as when saccharin is added to the electrochemical bath. The catalytic performance of the CoPt alloys for the nitro to amino phenol compounds conversion was investigated for all the prepared samples, and the results show that the conversion degree increases (from 11.4 to 96.5%) even though the Pt content in the samples decreases. From the samples prepared from the electrochemical bath with saccharin, a study regarding the effect of contact time was performed. The results indicated that after only 5 min, the CoPt sample prepared at pH = 5.5 in the presence of saccharin completely converted the nitro compound to an amino compound.

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Section: Reduction Of 4-np To 4-ap Using Synthesized Materialsmentioning

confidence: 99%

Effect of the Preparation Conditions on the Catalytic Properties of CoPt for Highly Efficient 4-Nitrophenol Reduction

et al. 2022

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“…In the process, the kinetics of reduction reaction is greatly facilitated due to the presence of catalyst. [21][22] The potential mechanism In the whole process, the AC not only promotes electron transfer, but also facilitates the adsorption of 4-NP. [23][24] Moreover, the catalytic activity of as-prepared catalysts is superior to those reported in the literature.…”

Section: Resultsmentioning

confidence: 99%

Magnetic CuFe 2 O 4 nanoparticles highly dispersed on coal-based activated carbons: a recoverable catalyst for the reduction of 4-nitrophenol, congo red, and rhodamine B

Zhang

Tang

Gao

et al. 2022

Preprint

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Here, we report a simple co-precipitation and heat treatment routine for preparing CuFe2O4/activated carbons (AC) magnetic catalyst assisted by trisodium citrate (TSC), in which CuFe2O4 nanoparticles are uniformly distributed onto coal-derived activated carbons (AC). The CuFe2O4/AC nanocomposites exhibit brilliant catalytic performance for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in comparison with previous reported catalysts. Furthermore, it was found that the nanocomposite can effectively degrade anionic and cationic dyes (rhodamine B and congo red) in wastewater. Importantly, the CuFe2O4/AC catalyst can be facilely separated by the external magnetic field and revealed favorable stability. The excellent catalytic activity of the CuFe2O4/AC catalyst can be mainly attributed to the synergistic coupling between the coal-based activated carbon (AC) with a high surface area and CuFe2O4 nanoparticles with a small size. The combination of co-precipitation and heat treatment can be applied in preparing other catalysts used in the industry.

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“…The presence of a catalyst greatly facilitates the kinetics of the reduction reaction. 28,29 The possible mechanism for reducing 4-NP by the copper-decorated iron oxide/AC nanocomposites is as follows: (I) 4-NP is adsorbed on the copper-decorated iron oxide/AC surface. (II) The production of highly reactive H* radical species is promoted on the surface of copper-decorated iron oxide nanoparticles.…”

Section: Effect Of the Ac Content On The Structure And Performance Of...mentioning

confidence: 99%

Copper-decorated iron oxide nanoparticles highly dispersed on coal-based activated carbons: a recoverable catalyst for the reduction of 4-nitrophenol, Congo red, and Rhodamine B

Zhang,

Tang,

Gao

et al. 2024

New J. Chem.

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Fast and efficient single step synthesis of modified magnetic nanocatalyst for catalytic reduction of 4-nitrophenol

Cited by 12 publications

References 36 publications

Effect of the Preparation Conditions on the Catalytic Properties of CoPt for Highly Efficient 4-Nitrophenol Reduction

Effect of the Preparation Conditions on the Catalytic Properties of CoPt for Highly Efficient 4-Nitrophenol Reduction

Magnetic CuFe 2 O 4 nanoparticles highly dispersed on coal-based activated carbons: a recoverable catalyst for the reduction of 4-nitrophenol, congo red, and rhodamine B

Copper-decorated iron oxide nanoparticles highly dispersed on coal-based activated carbons: a recoverable catalyst for the reduction of 4-nitrophenol, Congo red, and Rhodamine B

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