In situ synthesis of silver nanostructures on magnetic Fe<sub>3</sub>O<sub>4</sub>@C core–shell nanocomposites and their application in catalytic reduction reactions

Zhu, Maiyong; Wang, Chengjiao; Meng, Dehai; Diao, Guowang

doi:10.1039/c2ta00669c

Cited by 264 publications

(149 citation statements)

References 66 publications

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“…To solve this problem, excellent highly porous, supporting matrices to provide accessible channels for target organic molecules to contact metal nanoparticles are needed. Noble metals such as gold (Au), silver (Ag) and platinum (Pt) have been used to as catalysts (Zhu et al, 2013;Leung et al, 2012), but their expensiveness and scarcity limit their application and scope. Therefore, to degrade organic contaminants in water, it was considered urgent to develop nonnoble metal materials with effective catalytic properties that were also stable in water.…”

Section: Introductionmentioning

confidence: 99%

Cu/Cu2O/CuO loaded on the carbon layer derived from novel precursors with amazing catalytic performance

Zhao

Tan

et al. 2016

Science of The Total Environment

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• We present an effective catalyst for reductive degradation of organic dyes and phenols in water.• Compared with noble metals, Cu/Cu 2 O/ CuO@C particles are more efficient and less expensive • The porous structure provided a large contact area and channels for the pollutions and active site. , infrared spectroscopy and Raman analysis, revealed that it was composed of graphitized carbon with numerous nanoparticles (100 nm in diameter) of Cu/CuO/Cu 2 O that were uniformly distributed on internal and external surfaces of the carbon support. Gallic acid (GA) has been used as both organic ligand and carbon precursor with metal organic frameworks (MOFs) as the sacrificial template and metal oxide precursor in this green synthesis. The material combined the advantages of MOFs and Cu-containing materials, the porous structure provided a large contact area and channels for the pollutions, which results in more rapid catalytic degradation of pollutants and leads to greater efficiency of catalysis. The material gave excellent catalytic performance for organic dyes and phenols. In this study, Cu/Cu 2 O/CuO@C was used as catalytic to reduce 4-NP, which has been usually adopted as a model reaction to check the catalytic ability. Catalytic experiment results show that 4-NP was degraded approximately 3 min by use of 0.04 mg of catalyst and the conversion of pollutants can reach more than 99%. The catalyst exhibited little change in efficacy after being utilized five times. Rates of degradation of dyes, such as Methylene blue (MB) and Contents lists available at ScienceDirectScience of the Total Environment j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / s c i t o t e n v Rhodamine B (RhB) and phenolic compounds such as O-Nitrophenol (O-NP) and 2-Nitroaniline (2-NA) were all similar.

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Section: Introductionmentioning

confidence: 99%

Cu/Cu2O/CuO loaded on the carbon layer derived from novel precursors with amazing catalytic performance

Zhao

Tan

et al. 2016

Science of The Total Environment

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“…In catalysis, noble metal catalysts (Au, Ag, etc) have been widely used due to their high selectivity and catalytic efficiency [1,2]. Despite the great progress achieved by far, the scarce and high-cost of noble metal resources make them uneconomic for practical application.…”

Section: Introductionmentioning

confidence: 99%

MOF derived porous carbon supported Cu/Cu 2 O composite as high performance non-noble catalyst

Niu

Liu

Cai

et al. 2016

Microporous and Mesoporous Materials

153

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a b s t r a c tPorous carbon supported copper composite (Cu/Cu 2 O/C) was synthesized with a facile, low cost and novel method and used as non-noble-metal catalyst for reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) by NaBH 4 . In the synthetic strategy, metal organic framework Cu 3 (BTC) 2 (also denoted as HKUST-1) was used as both sacrificial template and copper precursor, and phenol formaldehyde resin as carbon precursor. The catalytic Cu/Cu 2 O nanoparticles (Cu/Cu 2 O NPs) about 40 nm-indiameter distributed uniformly both on the internal and external surface of the porous carbon flakes, and took up 33.38e37.56 wt% of the Cu/Cu 2 O/C composite. Compared with noble metal catalysts, the prepared composite showed comparable high catalytic activity, which was mainly due to their porous structure facilitating diffusion of reactants and products, and the high dispersion of accessible catalytic Cu/Cu 2 O NPs on porous carbon. Moreover, the synthesized catalyst can be reused for at least five cycles due to its good stability. These results confirmed that the as-prepared Cu/Cu 2 O/C is promising candidate to replace noble metal for catalytic application.

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“…To determine the formation and crystalline structure of the [26,32] For Fe 3 O 4 /Cu, in addition to these peaks, an additional peak at 50.4°that corresponded to the (200) plane of metallic Cu [33,34] was clearly present, thus suggesting the formation of metallic Cu. The characteristic peaks of metal Cu at 43.3 and 74.1°overlapped that of Fe 3 O 4 .…”

Section: Structural Characterizationmentioning

confidence: 99%

One‐Step Green Synthesis of Multifunctional Fe₃O₄/Cu Nanocomposites toward Efficient Reduction of Organic Dyes

Wang

Zhai

et al. 2015

Eur J Inorg Chem

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Noble-metal-derived functional materials have played indispensable roles in the reduction of dye under aqueous conditions; however, their cost and separation are great limitations on their wider practical applications. Therefore, an alternative preparation of comparable materials with low cost and good ease of separation is required. Herein magnetic microspheres (i.e., Fe 3 O 4 /Cu) were synthesized through a green single-step solvothermal method for the first time with ethylene glycol serving as reductant and reaction media. The prepared materials were characterized by means of powder Xray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, energy-dispersive X-ray spectrometry, a vibrating sample mag-

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In situ synthesis of silver nanostructures on magnetic Fe₃O₄@C core–shell nanocomposites and their application in catalytic reduction reactions

Cited by 264 publications

References 66 publications

Cu/Cu2O/CuO loaded on the carbon layer derived from novel precursors with amazing catalytic performance

Cu/Cu2O/CuO loaded on the carbon layer derived from novel precursors with amazing catalytic performance

MOF derived porous carbon supported Cu/Cu 2 O composite as high performance non-noble catalyst

One‐Step Green Synthesis of Multifunctional Fe₃O₄/Cu Nanocomposites toward Efficient Reduction of Organic Dyes

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In situ synthesis of silver nanostructures on magnetic Fe3O4@C core–shell nanocomposites and their application in catalytic reduction reactions

Cited by 264 publications

References 66 publications

Cu/Cu2O/CuO loaded on the carbon layer derived from novel precursors with amazing catalytic performance

Cu/Cu2O/CuO loaded on the carbon layer derived from novel precursors with amazing catalytic performance

MOF derived porous carbon supported Cu/Cu 2 O composite as high performance non-noble catalyst

One‐Step Green Synthesis of Multifunctional Fe3O4/Cu Nanocomposites toward Efficient Reduction of Organic Dyes

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Product

Resources

About

In situ synthesis of silver nanostructures on magnetic Fe₃O₄@C core–shell nanocomposites and their application in catalytic reduction reactions

One‐Step Green Synthesis of Multifunctional Fe₃O₄/Cu Nanocomposites toward Efficient Reduction of Organic Dyes