Amine functional silica–supported bimetallic Cu-Ni nanocatalyst and investigation of some typical reductions of aromatic nitro-substituents

Sarker, Mohammad Zakaria; Rahman, Mohammad Mahbubur; Minami, Hideto; Suzuki, Toyoko; Ahmad, Hasan

doi:10.1007/s00396-021-04910-w

Cited by 13 publications

(8 citation statements)

References 72 publications

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“…Figure represents the XRD of (a) MCF, (b) Cu–Ni@MCF, (c) reused Cu–Ni@MCF, (d) Cu–Pd@MCF, (e) Ni@MCF, and (f) Cu@MCF, which are in accordance with that described in the literature. ,− The diffractogram for MCF showed a single broad peak, at a 2θ value of ∼22°. The XRD patterns for fresh and reused 10% (1:1) Cu–Ni@MCF catalyst could not be obtained properly due the amorphous nature of the catalyst, low amount of metal loading, and incorporation of nanometals into the support.…”

Section: Resultssupporting

confidence: 82%

Bimetallic Cu–Ni Nanometal Supported over Mesocellular Silica Foam As a Novel Catalyst for One-Pot Synthesis of Benzimidazole in DMF As a Bifunctional Reagent

Mohire

Yadav

2022

Ind. Eng. Chem. Res.

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Benzimidazole has several applications in different industries but is used mainly in the pharmaceutical sector. Due to its high demand, the production of benzimidazole by clean and green catalytic processes has become important. In the present study, we have optimized a method to achieve a one-pot synthesis of benzimidazole selectively over a meso-cellular foam (MCF) supported bimetallic catalyst, Cu–Ni@MCF. This catalyst provides active metal sites for hydrogenation of o-nitroaniline to o-phenylenediamine (OPDA) as well as cyclization of OPDA into the final product, benzimidazole. Along with the bifunctionality of the catalyst, the solvent consisting of a mixture of dimethylformamide (DMF) and water (2:1) plays a significant role in providing the in situ source of hydrogen and carbon dioxide for both the hydrogenation and cyclization steps, respectively. o-Nitroaniline is converted into the final desired product in 6 h at 180 °C and 800 rpm (for the lab reactor). Characterization of the synthesized catalyst was done to understand its activity and selectivity. The reaction mechanism and kinetics were established, and the apparent activation energy was calculated. Optimization studies were done to get the best results for the reaction. The non-noble-supported nanometal catalyst aids in cutting down the cost of the overall system and reduces the reaction period. It is a clean and green process.

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Section: Resultssupporting

confidence: 82%

Bimetallic Cu–Ni Nanometal Supported over Mesocellular Silica Foam As a Novel Catalyst for One-Pot Synthesis of Benzimidazole in DMF As a Bifunctional Reagent

Mohire

Yadav

2022

Ind. Eng. Chem. Res.

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“…In order to test the universality of the materials, we extended to other nitro aromatic compounds under the same experimental conditions [40] . The experimental results are shown in Table S1.…”

Section: Resultsmentioning

confidence: 99%

“…[17,38,39] In order to test the universality of the materials, we extended to other nitro aromatic compounds under the same experimental conditions. [40] The experimental results are shown in Table S1. It can be seen from Table S1 that almost all the selected nitro aromatic hydrocarbons are reduced to amino aromatic hydrocarbons, and the conversion rates are above 80 %.…”

Section: Catalytic Activity Analysismentioning

confidence: 99%

Preparation of Cu₂O/Au Composite Nanomaterials for Effective Reduction of 4‐Nitrophenol

Zhao

Gao

et al. 2023

ChemistrySelect

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The conversion of nitroaromatics to aminobenzene plays an important role in the synthesis of medicines or fine chemicals. In this work, we successfully prepared Cu2O/Au nanocubes with different Au content for the reduction of 4‐nitrophenol. With the increase of gold precursor concentration or reaction time, the density of Au nanoparticles (NPs)on Cu2O surface increases, which results in the stronger electron transfer between Au and Cu2O, and thus the better synergistic catalytic performance of Cu2O/Au nanoparticles toward 4‐Nitrophenol (4‐NP). In this work, we found the Au component in the nanoparticles played an important role in charge redistribution and transfer, as well as the adsorption and reduction of 4‐NP. Therefore, the degradation performance of Cu2O/Au composite is better than that of pure Cu2O, and the degradation rate of 4‐NP can reach almost 90 % in 10 min, therefore providing a new idea for the rational design of effective nanocatalysts.

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“…TON is defined as the number of substrate moles that 1 mol of catalyst can convert into products, whereas TOF is simply computed as TON/reaction time. [ 162,212–230 ]…”

Section: Dye Degradation Using Green (Plant) Mnpsmentioning

confidence: 99%

“…TON is defined as the number of substrate moles that 1 mol of catalyst can convert into products, whereas TOF is simply computed as TON/reaction time. [162,[212][213][214][215][216][217][218][219][220][221][222][223][224][225][226][227][228][229][230] For example, My-Thao and his coworkers [162] biogenically synthesized Au and Ag NPs using waste Passiflora edulis fruit peels. The green spherical NPs were evaluated for catalytic activity against four common dye pollutants (MO, EY, Rh6G, and RhB).…”

Section: Aumentioning

confidence: 99%

Phytogenically bioengineered metal nanoarchitecture for degradation of refractory dye water pollutants: A pragmatic minireview

Emmanuel

Adesibikan

Saliu

2022

Applied Organom Chemis

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The present scenario of water insecurity (poor availability and accessibility to clean and healthy water when needed) denotes the preponderance of environmental damage caused by effluents or waste runoff from industries, such as the dye and textile industries. The polluted waters have led to terrible and sonorous negative impacts on the ecosystem and econetworking, thus, urging for a sustainably suitable substitute to tackle and annul the noxious environmental constraint posse by the hazardous dye effluent. Several chemical and physical methods for treating dye effluent are now in use, but they are time‐consuming, expensive, and inefficient. Interestingly, nanoparticles have egressed as a superior answer for efficient dye removal and degradation, because of their chemical reactivity and exceptional surface characteristics. As a result, the use of metal nanomaterials in the treatment of dye runoffs has been thoroughly investigated. The study used major scientific databases such as SciFinder, Scopus, PubMed, Google Scholar, and Science Direct to conduct a comprehensive review of publicly available literature. Degradation, dye effluent, green metal nanoparticles, and water pollution were the keywords used to find scholarly papers. Efforts were made to figure out and explain the mechanism of dye effluent degradation, how long the degradation will take and how effective the use of plant biosynthesized metal nanoparticles for dye removal is. In addition, the role of bimetallic nanoparticles has also been investigated with remarkable feat from literature. The current level of knowledge about the mechanism and the use of plant biogenic metal nanoparticles in common dye effluent treatment is summarized in this paper.

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Amine functional silica–supported bimetallic Cu-Ni nanocatalyst and investigation of some typical reductions of aromatic nitro-substituents

Cited by 13 publications

References 72 publications

Bimetallic Cu–Ni Nanometal Supported over Mesocellular Silica Foam As a Novel Catalyst for One-Pot Synthesis of Benzimidazole in DMF As a Bifunctional Reagent

Bimetallic Cu–Ni Nanometal Supported over Mesocellular Silica Foam As a Novel Catalyst for One-Pot Synthesis of Benzimidazole in DMF As a Bifunctional Reagent

Preparation of Cu₂O/Au Composite Nanomaterials for Effective Reduction of 4‐Nitrophenol

Phytogenically bioengineered metal nanoarchitecture for degradation of refractory dye water pollutants: A pragmatic minireview

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Amine functional silica–supported bimetallic Cu-Ni nanocatalyst and investigation of some typical reductions of aromatic nitro-substituents

Cited by 13 publications

References 72 publications

Bimetallic Cu–Ni Nanometal Supported over Mesocellular Silica Foam As a Novel Catalyst for One-Pot Synthesis of Benzimidazole in DMF As a Bifunctional Reagent

Bimetallic Cu–Ni Nanometal Supported over Mesocellular Silica Foam As a Novel Catalyst for One-Pot Synthesis of Benzimidazole in DMF As a Bifunctional Reagent

Preparation of Cu2O/Au Composite Nanomaterials for Effective Reduction of 4‐Nitrophenol

Phytogenically bioengineered metal nanoarchitecture for degradation of refractory dye water pollutants: A pragmatic minireview

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Preparation of Cu₂O/Au Composite Nanomaterials for Effective Reduction of 4‐Nitrophenol