Facile synthesis of hierarchical core–shell Fe3O4@MgAl–LDH@Au as magnetically recyclable catalysts for catalytic oxidation of alcohols

Mi, Fei; Chen, Xitao; Ma, Yuewen; Yin, Shuangtao; Yuan, Fanglong; Zhang, Hui

doi:10.1039/c1cc15858a

Cited by 132 publications

(104 citation statements)

References 21 publications

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“…Moreover, the pore size of these templates is generally less than 2.5 nm [13,14], which provides a considerable diffusion barrier for carbon precursor molecules' spread. Layered double hydroxide (LDH) with large surface area, low cost, three-dimensional structure has been demonstrated huge potential for drug delivery, catalysis, sensing, and pollutants adsorption [15][16][17][18][19]. The orientation and dimensionality hierarchical structure as well as the large expandable interlayer free space make it easier for further modification.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of novel flowerlike magnetic mesoporous carbon for efficient chlorophenols removal

Liu

Niu

et al. 2014

Microporous and Mesoporous Materials

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a b s t r a c tWe present here a novel, low cost and environmental-friendly synthetic strategy for fabricating flowerlike magnetic mesoporous carbon (MMC) microspheres by using silica coated ), as well as good chemical inertness and mechanical stability. The MMC spheres were used to adsorb 2,4,6-trichlorophenol (TCP) from simulated water samples. Experiment results suggest that the adsorption was favorable at acidic pH and increased with the rise of initial TCP concentration and temperature. Kinetic parameters were proved to follow the pseudo-second-order kinetics model and the equilibrium data was more favorable for Freundlich isotherm. The equilibrium absorption capacity was 210 mg g À1 at initial TCP concentration of 20 mg L À1and increased to 587 mg g À1 when the initial TCP concentration was up to 100 mg L À1, which was much higher than those of other carbon-based adsorbents reported in literature. To the best of our knowledge, this is the first report on the synthesis of flowerlike MMC material by using LDH as template and its application as adsorbent to remove TCP.

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Section: Introductionmentioning

confidence: 99%

Facile synthesis of novel flowerlike magnetic mesoporous carbon for efficient chlorophenols removal

Liu

Niu

et al. 2014

Microporous and Mesoporous Materials

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“…Previously flowerlike Fe 3 O 4 @SiO 2 @NiAl-LDH were synthesized via in situ growth then applied for separation of a histidine (His)-tagged green fluorescent protein [18]. The other method, coprecipitation, uses synthesis of magnetic M(II)Al-LDH in a single step, without first forming the surface layer of AlOOH [10,12]. However, because the reaction in separate synthesis solutions for at least 10 repetitions each lasting 2 h, the in situ grow of the AlOOH layer was time consuming.…”

Section: Introductionmentioning

confidence: 99%

Surfactant-modified flowerlike layered double hydroxide-coated magnetic nanoparticles for preconcentration of phthalate esters from environmental water samples

Zhao

Liu

Wang

et al. 2015

Journal of Chromatography A

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a b s t r a c tA novel type of layered, flowerlike magnetic double hydroxide (MLDH) nanoparticles modified by surfactants has been successfully synthesized and was applied as an effective sorbent for pre-concentration of several phthalate ester pollutants (PAEs) from water prior to quantification. The MLDH was obtained via a simple ultrasound-assisted method by using silica coated Fe 3 O 4 as the core and anisotropic Mg-Al layered double hydroxide (Mg-Al LDH) nanocrystals as the shell to which analytes were absorbed. Orientation and dimensionality hierarchical structure as well as the large expandable interlayer free space and positive charge of the Mg-Al LDH shell make it easier to form anionic surfactant micelles on its surface via self-assembly. Due to its high adsorption area, compared with non-mesoporous nano solid-phase extraction agents, mesoporous channel shell and reduction diffusion path, MLDH exhibited high extraction efficiency of organic target residues. Under optimized conditions, with a total of 30 mg of adsorbant added to from samples containing 400 mL water from the environment recoveries of DPP, DBP, DCP and DOP were consistent with ranges of 69-101%, 79-101%, 86-102% and 63-100%, respectively. Standard deviations of recoveries ranged from 1 to 7%, respectively and the method was sensitive with limits of detection of 12.3, 18.7, 36.5 and 15.6 ng L −1 . To the best of our knowledge, this is the first report of use of surfactant-modified MLDH nanoparticles and its application as adsorbent to pre-concentration of PAEs from environmental water samples prior to instrumental analyses.

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“…As we analyzed the patents regarding this aspect, we observed that only 13.4 per cent of the patents in the sample mentioned a method to recover the nanocatalysts, as illustrated in Figure 11. Although the magnetic recovery of nanocatalysts is a hot topic in academic research, as inferred from various publications discussed above [22,33,50,55,56,84,85,[115][116][117][118][140][141][142], only two patents (0.8%) suggest the use of magnetic recovery. The majority of all patents (65.4%) do not specify any kind of recovery method.…”

Section: Nanocatalysis: Intellectual Propertymentioning

confidence: 99%

“…Furthermore, several authors proposed magnetic coreshell nanosystems with regard to the recovery of the catalytically active moieties [140][141][142][143][144]. Mi et al designed such a catalytic system with an iron oxide core and a shell consisting of magnesium, aluminum, and gold compounds for the oxidation of 1-phenylethanol [140].…”

Section: Journal Of Nanotechnologymentioning

confidence: 99%

“…Mi et al designed such a catalytic system with an iron oxide core and a shell consisting of magnesium, aluminum, and gold compounds for the oxidation of 1-phenylethanol [140]. It is also conceivable to use a component in a core-shell system that combines both catalytic activity and magnetic recoverability, as demonstrated by Park et al They synthesized a nanoreactor, built from a Ni core protected from sintering at high temperatures by a SiO 2 shell, for the steam reforming of methane [143].…”

Section: Journal Of Nanotechnologymentioning

confidence: 99%

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Nanocatalysis: Academic Discipline and Industrial Realities

Olveira

Forster

Seeger

2014

Journal of Nanotechnology

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Nanotechnology plays a central role in both academic research and industrial applications. Nanoenabled products are not only found in consumer markets, but also importantly in business to business markets (B2B). One of the oldest application areas of nanotechnology is nanocatalysis-an excellent example for such a B2B market. Several existing reviews illustrate the scientific developments in the field of nanocatalysis. The goal of the present review is to provide an up-to-date picture of academic research and to extend this picture by an industrial and economic perspective. We therefore conducted an extensive search on several scientific databases and we further analyzed more than 1,500 nanocatalysis-related patents and numerous market studies. We found that scientists today are able to prepare nanocatalysts with superior characteristics regarding activity, selectivity, durability, and recoverability, which will contribute to solve current environmental, social, and industrial problems. In industry, the potential of nanocatalysis is recognized, clearly reflected by the increasing number of nanocatalysis-related patents and products on the market. The current nanocatalysis research in academic and industrial laboratories will therefore enable a wealth of future applications in the industry.

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Facile synthesis of hierarchical core–shell Fe3O4@MgAl–LDH@Au as magnetically recyclable catalysts for catalytic oxidation of alcohols

Cited by 132 publications

References 21 publications

Facile synthesis of novel flowerlike magnetic mesoporous carbon for efficient chlorophenols removal

Facile synthesis of novel flowerlike magnetic mesoporous carbon for efficient chlorophenols removal

Surfactant-modified flowerlike layered double hydroxide-coated magnetic nanoparticles for preconcentration of phthalate esters from environmental water samples

Nanocatalysis: Academic Discipline and Industrial Realities

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