Magnetic-field-induced deposition to fabricate multifunctional nanostructured Co, Ni, and CoNi alloy films as catalysts, ferromagnetic and superhydrophobic materials

Li, Hao; Liao, Jinyun; Du, Yifeng; You, Tingting; Liao, Weiwen; Wen, Lili

doi:10.1039/c3cc39237f

Cited by 66 publications

(35 citation statements)

References 21 publications

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“…The metal‐free catalytic reduction of Nip to 4‐aminophenol using NaBH 4 as the reductant mediated by N‐doped graphene (NG) was reported by Chen group . The undoped graphene materials did not possess any catalytic activity; while the activity of the NG is comparable with some of the previously reported metallic catalysts . In situ FTIR experiment demonstrated that Nip ions adsorb to NG via the hydroxyl groups but not the nitro.…”

Section: Reductionmentioning

confidence: 84%

Heteroatom‐Enhanced Metal‐Free Catalytic Performance of Carbocatalysts for Organic Transformations

Shang

Gao

2019

ChemCatChem

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The exploitation and design of metal‐free catalysts for chemical transformation is always a fascinating theme from the prospective of fundamental and applied research. In addition to their distinct advantages such as lower cost, higher biocompatibility and reliability and thus higher sustainability, metal‐free materials often unexpectedly render different reaction pathway or mechanism from conventional metal catalysts. As a consequence, metal‐free catalysts have revolutionized and expanded the platform of catalysis. Among them, carbons are a typical class of nonmetallic materials. To date, a series of elements (e. g., B, N, P or S) as heteroatom dopants have equipped pristine carbons with enhanced performance and even new chemical functionality. It was proposed to attribute to modulated electrical properties and surface physicochemical features originated from structural distortions and changes of charge densities. In this minireview, we overviewed the catalytic application of heteroatom‐doped carbocatalysts in oxidation, oxidative coupling, reduction and hydrogenation reactions with special emphasis on the role of heteroatoms and consequently enhanced performance. This minireview highlights the structure‐activity correlations, thereby directing the rational design of advanced metal‐free catalysts for organic synthesis. Some controversies about active sites and challenges in catalyst design are also discussed here.

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Section: Reductionmentioning

confidence: 84%

Heteroatom‐Enhanced Metal‐Free Catalytic Performance of Carbocatalysts for Organic Transformations

Shang

Gao

2019

ChemCatChem

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“…This also confirms the formation 4‐AP as a sole product of the reaction. The characteristic peaks of the 4‐AP are IR: (ν max =cm −1 ): 3423; 3340 (NH 2 ); 3190 (OH) …”

Section: Catalytic Reduction Of 4‐np To 4‐apmentioning

confidence: 99%

Hetero–nanostructured Ni/α‐Mn₂O₃ as Highly Active Catalyst for Aqueous Phase Reduction Reactions

et al. 2016

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In this work, a simple strategy for the synthesis of hetero‐nanostructured Ni/α‐Mn2O3 via surfactant‐aided co‐reduction method is reported. The as synthesized Ni/α‐Mn2O3 is applied as catalytic material for the aqueous phase reduction of 4‐nitrophenol (4‐NP) and organic dye pollutants, namely Rhodamine B (RhB), Methylene blue (MB), Rose Bengal (RB), Congo red (CR), and Methyl orange (MO) in the presence of a mild reducing agent, NaBH4. This synthetic route provides homogeneous dispersion of Ni nanoparticles over α‐Mn2O3 surface. The nanoparticles and support are characterized using XRD, SEM/EDX, TEM, AAS and BET surface area analyses. The Ni particles are spherical, crystalline and size ranges < 5 nm. Further, hetero‐nanostructured Ni/α‐Mn2O3 is established as a highly efficient recyclable catalyst for the reduction of 4‐NP to 4‐aminophenol (4‐AP). The HPLC and FTIR analysis shows that 4‐AP is the sole product of the reduction of 4‐NP. The Ni/α‐Mn2O3 also exhibits high activity towards reduction of cationic and anionic dye pollutants. Thus, the as synthesized hetero‐nanostructured Ni/α‐Mn2O3 can be considered as the future contender for the wastewater treatment.

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“…Fig. [20][21][22][23][24][25][26][27][28][29] Spongy/dendritic structures are renowned for their superior catalytic activity and efficient utilization of catalyst due to special characteristics of alloys and dendritic structures. The Cu-Pt nanodendrites apparently possess a dense branching morphology, while the Cu-Pd and Cu-Au nanodendrites appear to be more symmetrical.…”

Section: (B D and F))mentioning

confidence: 99%

“…The Cu-Pt nanodendrites apparently possess a dense branching morphology, while the Cu-Pd and Cu-Au nanodendrites appear to be more symmetrical. 21,[25][26][27][28][29][30][31][32] The conversion of 4-nitrophenolate ions to 4-AP by the spongy/dendritic structures was monitored by UV-visible spectroscopy, as shown in Fig. The presence of noble metal in the Cu-based dendritic structures is confirmed through EDS studies (Fig.…”

Section: (B D and F))mentioning

confidence: 99%

Uninterrupted galvanic reaction for scalable and rapid synthesis of metallic and bimetallic sponges/dendrites as efficient catalysts for 4-nitrophenol reduction

Barman

Nanda

2015

Dalton Trans.

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Here, we demonstrate an uninterrupted galvanic replacement reaction (GRR) for the synthesis of metallic (Ag, Cu and Sn) and bimetallic (Cu-M, M=Ag, Au, Pt and Pd) sponges/dendrites by sacrificing the low reduction potential metals (Mg in our case) in acidic medium. The acidic medium prevents the oxide formation on Mg surface and facilitates the uninterrupted reaction. The morphology of dendritic/spongy structures is controlled by the volume of acid used for this reaction. The growth mechanism of the spongy/dendritic microstructures is explained by diffusion-limited aggregate model (DLA), which is also largely affected by the volume of acid. The significance of this method is that the yield can be easily predicted, which is a major challenge for the commercialization of the products. Furthermore, the synthesis is complete in 1-2 minutes at room temperature. We show that the sponges/dendrites efficiently act as catalysts to reduce 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) using NaBH4-a widely studied conversion process.

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Magnetic-field-induced deposition to fabricate multifunctional nanostructured Co, Ni, and CoNi alloy films as catalysts, ferromagnetic and superhydrophobic materials

Cited by 66 publications

References 21 publications

Heteroatom‐Enhanced Metal‐Free Catalytic Performance of Carbocatalysts for Organic Transformations

Heteroatom‐Enhanced Metal‐Free Catalytic Performance of Carbocatalysts for Organic Transformations

Hetero–nanostructured Ni/α‐Mn₂O₃ as Highly Active Catalyst for Aqueous Phase Reduction Reactions

Uninterrupted galvanic reaction for scalable and rapid synthesis of metallic and bimetallic sponges/dendrites as efficient catalysts for 4-nitrophenol reduction

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Magnetic-field-induced deposition to fabricate multifunctional nanostructured Co, Ni, and CoNi alloy films as catalysts, ferromagnetic and superhydrophobic materials

Cited by 66 publications

References 21 publications

Heteroatom‐Enhanced Metal‐Free Catalytic Performance of Carbocatalysts for Organic Transformations

Heteroatom‐Enhanced Metal‐Free Catalytic Performance of Carbocatalysts for Organic Transformations

Hetero–nanostructured Ni/α‐Mn2O3 as Highly Active Catalyst for Aqueous Phase Reduction Reactions

Uninterrupted galvanic reaction for scalable and rapid synthesis of metallic and bimetallic sponges/dendrites as efficient catalysts for 4-nitrophenol reduction

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Hetero–nanostructured Ni/α‐Mn₂O₃ as Highly Active Catalyst for Aqueous Phase Reduction Reactions