Reduction of 4‐Nitrophenol as a Model Reaction for Nanocatalysis

Noh, Ji‐Hyang; Meijboom, Reinout

doi:10.1002/9781118939314.ch13

Cited by 19 publications

(11 citation statements)

References 133 publications

(423 reference statements)

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“…24 The reduction potential is significantly different for metal nanoparticles of varying sizes in comparison to bulk metals, since the Fermi potential of nanoparticles View Article Online becomes more negative. 25 To illustrate this, the reduction of 4-nitrophenol reaction was used herein as a case study (Fig. 11).…”

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confidence: 99%

Continuous synthesis of tuneable sized silver nanoparticles via a tandem seed-mediated method in coiled flow inverter reactors

Torrente‐Murciano

2018

React. Chem. Eng.

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Continuous synthesis of tuneable sized silver nanoparticles via a tandem seed-mediated method in coiled fl ow inverter reactorsThe continuous synthesis of metal nanoparticles with tuneable sizes in the absence of organic capping ligands is presented. 3D microreactors connected in series enable the separation of the nucleation and growth steps during the synthesis of silver nanoparticles. The coiled fl ow inverted reactor confi guration promotes the rotation of the fl uid, limiting the agglomeration of the particles, and leading to narrow size distributions. As featured in:See Ke-Jun Wu and Laura Torrente-Murciano, React. Chem. Eng., 2018, 3, 267.rsc.li/reaction-engineering Reaction Chemistry & Engineering flow. We also demonstrate that careful control of the nature of the reducing agents in each step is essential to avoid secondary nucleation and ensure narrow size distributions. This innovative new capability will not only provide fundamental understanding of the effect of the size of nanoparticles in a number of applications but also enable the deployment of large-scale well-defined nanoparticles for commercial uses.

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confidence: 99%

Continuous synthesis of tuneable sized silver nanoparticles via a tandem seed-mediated method in coiled flow inverter reactors

Torrente‐Murciano

2018

React. Chem. Eng.

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“…In addition, the catalytic activity of synthesized carbon-supported Ni-NPs was tested on a well-known model reaction, namely the reduction of 4-nitrophenol (4NP) to 4-aminophenol (4AP) by NaBH 4 . This latter industrially important reaction is ideal for testing catalytic performance of our nickel NP catalyst, because (1) the reaction does not proceed at room temperature without a catalyst, (2) the sole product of the reaction is 4AP, (3) the reaction follows a pseudo-first-order kinetics in the presence of a large excess of NaBH 4 , and (4) the reaction can be easily monitored visually by following a color change from yellow (4NP) to colorless (4AP) or by UV/vis spectroscopy following the decrease in the absorption band of 4-nitrophenolate anion [ 11 , 12 , 13 , 14 , 15 , 16 ].…”

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confidence: 99%

Carbon Microsphere-Supported Metallic Nickel Nanoparticles as Novel Heterogeneous Catalysts and Their Application for the Reduction of Nitrophenol

et al. 2021

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Nickel nanoparticles are gaining increasing attention in catalysis due to their versatile catalytic action. A novel, low-cost and facile method was developed in this work to synthesize carbon microsphere-supported metallic nickel nanoparticles (Ni-NP/C) for heterogeneous catalysis. The synthesis was based on carbonizing a polystyrene-based cation exchange resin loaded with nickel ions at temperatures between 500 and 1000 °C. The decomposition of the nickel-organic framework resulted in both Ni-NP and carbon microsphere formation. The phase composition, morphology and surface area of these Ni-NP/C microspheres were characterized by powder X-ray diffraction, Raman spectroscopy, scanning electron microscopy and BET analysis. Elemental nickel was found to be the only metal containing phase; fcc-Ni coexisted with hcp-Ni at carbonization temperatures between 500 and 700 °C, and fcc-Ni was the only metallic phase at 800–1000 °C. Graphitization and carbon nanotube formation were observed at high temperatures. The catalytic activity of Ni-NP/C was tested in the reduction of 4-nitrophenol to 4-aminophenol by sodium borohydride, and Ni-NP/C was proved to be an efficient catalyst in this reaction. The relatively easy and scalable synthetic method, as well as the easy separation and catalytic activity of Ni-NP/C, provide a viable alternative to existing nickel nanocatalysts in future applications.

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“…There are three kinds of isomers: namely, o-nitrophenol, m-nitrophenol and p-nitrophenol (synonym: 4-nitrophenol (4-NP)) [4]. Among the three isomeric nitrophenols, 4-NP has the highest toxicity and the most stable structure, which makes it a fearful hazard to both the ecotope and the human body's health [5][6][7][8]. Considerable research efforts have been devoted to the removal and harmless disposal of 4-NP.…”

Section: Introductionmentioning

confidence: 99%

Recyclable Magnetic Cu/CuFe2O4 Nanocomposites for the Rapid Degradation of 4-NP

et al. 2020

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Magnetic Cu/CuFe2O4 nanocomposites were prepared by the one-pot thermal decomposition of acetylacetone compounds. Adjusting the molar ratios of Fe to Cu was used to control the content of Cu in the synthetic process. XRD, TEM, XPS and UV-Vis were employed to reveal detailed structural and catalytic activities of Cu/CuFe2O4 nanocomposites. Magnetic measurements demonstrated that Cu/CuFe2O4 nanocomposites possessed a considerable magnetic saturation. Cu/CuFe2O4 nanocomposites showed superb efficiency in the degradation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). 4-NP could be reduced by Cu/CuFe2O4 nanocomposites within 40 s in the attendance of NaBH4. Cu nanocrystals played an indispensable rose in the enhancement of catalytic performance. The synergistic effect of Cu and CuFe2O4 nanocrystals achieved the high-efficiency catalytic reduction for 4-NP. After six recycling experiments, the efficiency of Cu/CuFe2O4 nanocomposites was almost stable. Our work advances a straightforward strategy to synthesize efficient and recoverable Cu/CuFe2O4 nanocomposites, which has promising utilizations in the purifying of nitrophenolic contamination.

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Reduction of 4‐Nitrophenol as a Model Reaction for Nanocatalysis

Cited by 19 publications

References 133 publications

Continuous synthesis of tuneable sized silver nanoparticles via a tandem seed-mediated method in coiled flow inverter reactors

Continuous synthesis of tuneable sized silver nanoparticles via a tandem seed-mediated method in coiled flow inverter reactors

Carbon Microsphere-Supported Metallic Nickel Nanoparticles as Novel Heterogeneous Catalysts and Their Application for the Reduction of Nitrophenol

Recyclable Magnetic Cu/CuFe2O4 Nanocomposites for the Rapid Degradation of 4-NP

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