Gold nanoparticles supported by amino groups on the surface of magnetite microspheres for the catalytic reduction of 4-nitrophenol

Ma, Mingliang; Yang, Yuying; Li, Wenting; Feng, Renjun; Li, Zhangwen; Lyu, Peng; Ma, Yong

doi:10.1007/s10853-018-2868-1

Cited by 124 publications

(46 citation statements)

References 40 publications

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“…However, the high recombination rate of photogenerated electrons and holes limits their visible‐light photocatalytic activity. In order to solve this issue, many methods have been attempted, such as complexing with transition metal oxides as well as, sulfides,, doping foreign elements,, crystal facet engineering, and constructing specific structures,, etc.. Among these methods, doping foreign elements can change the band gap due to the introduction of impurity levels, which in turn affect the photocatalytic performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Leng

et al. 2019

ChemistrySelect

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Promoting the separation of electrons and holes for photocatalysis is still challenging. In this paper, alloyed BiOCl x Br 1-x nanosheets are synthesized to enhance the separation of electrons and holes by means of adjusting the thickness and the exposing specific crystal facet of nanosheet. SEM shows that the average thicknesses of samples are in the range of 34.7 to 47.2 nm. TEM analysis demonstrates that alloyed nanosheets obtained by codeposition method at room temperature have an exposure of (001) facet. Compared with pure BiOCl or BiOBr nanosheets, BiOCl x Br 1-x nanosheets exhibit a greatly enhanced photocatalytic activity for degrading RhB. In addition, BiOCl 0.5 Br 0.5 (BC5) sample with nanosheet thickness of 34.7 nm displays the highest photocatalytic activity, which is 17-time higher than that of pure BiOCl or BiOBr nanosheets. The superior photoactivity of BiOCl x Br 1-x nanosheets is attributed to the diverse light absorption, alloyed effect and different diffusion distance along [001] orientation. This study presents a 2D photocatalyst for degrading toxic pollutants to remedy environmental pollution. The revealing about the effect of thickness on photocatalytic properties could provide a new method to study the photoelectric properties related to 2D nanomaterials.[a] X.

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Section: Introductionmentioning

confidence: 99%

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Leng

et al. 2019

ChemistrySelect

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“…Fe 3 O 4 /P (GMA‐DVB) microspheres were synthesized in advance by distillation precipitation polymerization method . In a typical run, first, 0.75 g PEI was dissolved in 30 ml ethanol to obtain a homogeneous solution.…”

Section: Methodsmentioning

confidence: 99%

“…It is well known that Fe 3 O 4 microspheres can be used as functional materials for magnetic separation because of their excellent magnetism. Meanwhile, in the previous researches, Fe 3 O 4 microspheres introduced to synthesize magnetic recyclable catalysts have already been demonstrated …”

Section: Introductionmentioning

confidence: 99%

Preparation of magnetic Fe₃O₄/P (GMA‐DVB)‐PEI/Pd highly efficient catalyst with core‐shell structure

Yang

Liu

et al. 2019

Applied Organom Chemis

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In this paper, a simple route for palladium (Pd) nanoparticles attached to the surface of hollow magnetic Fe3O4/P (GMA‐DVB)‐polyethyleneimine (PEI) microspheres was established. Due to the large amount of imidogen groups and tertiary amine groups presenting in the PEI, Pd2+ ions could be anchored to the support by complexation with a polyfunctional organic ligand. Thereafter, a magnetic Pd catalyst having a high loading amount and good dispersibility was obtained by reducing Pd2+ ions. Afterwards, the prepared catalyst was characterized by TEM, SEM, FTIR, XRD, TGA, VSM, and UV–vis in detail. Ultimately, their catalytic activity was evaluated using the reduction of 4‐nitrophenol (4‐NP). Research showed that the Fe3O4/P (GMA‐DVB)‐PEI/Pd catalyst possessed high catalytic performances for the reduction of 4‐NP with a conversion rate of 98.43% within 540 s. Furthermore, the catalyst could be easily recovered and reused at least for nine successive cycles.

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“…Fe 3 O 4 nanoparticles are a commonly used Fenton catalytic material . Because the nanoparticles contain both Fe 2+ and Fe 3+ , they have superior catalytic performances unlike other Fenton reagents with only one valence state .…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic Fe₃O₄ nanoparticles prepared by ferrocene as high‐efficiency heterogeneous Fenton catalyst for the degradation of methyl orange

Chen

Liu

Zhang

et al. 2019

Applied Organom Chemis

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Hydrophilic Fe3O4 nanoparticles were prepared with ferrocene as an iron source via the thermal decomposition method and their catalytic response towards methyl orange was investigated. The effects of the pH, temperature, H2O2 dosage, catalyst dosage and initial dye concentration on the degradation of methyl orange were researched in detail. Furthermore, the stability of the catalyst was evaluated by measuring the degradation rate in eight successive cycles. The study demonstrates that methyl orange can be completely degraded i.e., a 99% degratation rate was obtained within 3 min. This excellent catalytic activity is attributed to the small size and good dispersibility of the nanoparticles, which stimulate the rapid and massive generation of reactive oxygen species in the heterogeneous Fenton reaction. In addition, the magnetic separation of the catalyst offers great prospects for fast and economical decontamination of dye polluted water.

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Gold nanoparticles supported by amino groups on the surface of magnetite microspheres for the catalytic reduction of 4-nitrophenol

Cited by 124 publications

References 40 publications

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Preparation of magnetic Fe₃O₄/P (GMA‐DVB)‐PEI/Pd highly efficient catalyst with core‐shell structure

Hydrophilic Fe₃O₄ nanoparticles prepared by ferrocene as high‐efficiency heterogeneous Fenton catalyst for the degradation of methyl orange

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Gold nanoparticles supported by amino groups on the surface of magnetite microspheres for the catalytic reduction of 4-nitrophenol

Cited by 124 publications

References 40 publications

Effect of Alloyed BiOClxBr1‐x Nanosheets Thickness on the Photocatalytic Performance

Effect of Alloyed BiOClxBr1‐x Nanosheets Thickness on the Photocatalytic Performance

Preparation of magnetic Fe3O4/P (GMA‐DVB)‐PEI/Pd highly efficient catalyst with core‐shell structure

Hydrophilic Fe3O4 nanoparticles prepared by ferrocene as high‐efficiency heterogeneous Fenton catalyst for the degradation of methyl orange

Contact Info

Product

Resources

About

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Effect of Alloyed BiOCl_xBr_1‐x Nanosheets Thickness on the Photocatalytic Performance

Preparation of magnetic Fe₃O₄/P (GMA‐DVB)‐PEI/Pd highly efficient catalyst with core‐shell structure

Hydrophilic Fe₃O₄ nanoparticles prepared by ferrocene as high‐efficiency heterogeneous Fenton catalyst for the degradation of methyl orange