One-step and acid free synthesis of γ-Fe 2 O 3 /SBA-15 for enhanced arsenic removal

Peng, Xing; Zhao, Ying; Yang, Tianxue; Yang, Yu; Jiang, Yonghai; Ma, Zhifei; Li, Xiaoguang; Hou, Jiaqi; Xi, Beidou; Liu, Hongliang

doi:10.1016/j.micromeso.2017.08.050

Cited by 41 publications

(16 citation statements)

References 43 publications

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“…The nitrogen sorption measurements were performed at 77 K. The Brunauer-Emmett-Teller (BET) specific surface area was calculated from the adsorption data in the p/p 0 range 0.05 -0.17. 31 Total pore…”

Section: Characterizationmentioning

confidence: 99%

“…Despite these differences, maghemite is the primary component (60 -80%) in the form of very small NPs (3 -6 nm), and both Fe 2 O 3 phases are active towards arsenic species adsorption. [29][30][31][32] Therefore, they were tested and compared in batch experiments at different pH values and initial arsenic concentration.…”

Section: Nanoscale Advances Accepted Manuscriptmentioning

confidence: 99%

“…3,24,[26][27][28] The latter ones, because of the small size, possess a high surface/volume ratio, therefore high accessibility of active sites, and are intriguing for this type of application. For instance, iron oxides are known to be active for the removal of arsenic, [29][30][31][32] both in the form of As(III) and As(V), and feature also low cost, ease of synthesis, and non-toxicity. [33][34][35] However, chemical stability at low pH, the accessibility of active sites upon aggregation, and the regeneration of NPs should be considered.…”

Section: Introductionmentioning

confidence: 99%

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Meso- and macroporous silica-based arsenic adsorbents: effect of pore size, nature of the active phase, and silicon release

et al. 2021

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Section: Characterizationmentioning

confidence: 99%

Section: Nanoscale Advances Accepted Manuscriptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Meso- and macroporous silica-based arsenic adsorbents: effect of pore size, nature of the active phase, and silicon release

et al. 2021

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“…[ 12,13 ] There are plenty of reports on the incorporation of magnetic mesoporous for preparing magnetically retrievable supported catalyst in the literature. [ 14,15 ] For example, Tai et al reported the preparation of sulfonic acid‐functionalized magnetic mesoporous silica, which has been used in the esterification of propionic acid. The activity of the prepared nanocomposite is high, and the catalyst can be recovered quickly and reuse several times.…”

Section: Introductionmentioning

confidence: 99%

A new Pd(II)‐supported catalyst on magnetic SBA‐15 for CC bond formation via the Heck and Hiyama cross‐coupling reactions

Rahimi

Mansoori

Nuri

et al. 2020

Applied Organom Chemis

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Magnetic mesoporous silica composite (MNP@SiO2‐SBA) was obtained via embedding magnetite nanoparticles between SBA‐15 channels. It was silylated with N‐(3‐(trimethoxysilyl)propyl)picolinamide (TMS‐PCA) and then complexed with Pd(II). The obtained supported Pd(II) catalyst (MNP@SiO2‐SBA‐PCA) was characterized by conventional methods. The prepared magnetic catalyst showed high activity in the Heck and Hiyama reactions under optimal reaction conditions, including solvent, amount of catalyst, base, and temperature. Aryl bromides and iodides showed better results than aryl chlorides, and the catalyst exhibited noticeable stability and reused several times.

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“…Recently, many researchers have extensively investigated modification of magnetic nanoparticles with mesoporous silica materials such as SBA‐15 and various kinds of MCM ,. Covering of magnetic nanoparticles with ordered mesoporous silica SBA‐15 aggregate blocks leads to the formation of Fe x O y @SBA‐15 core‐shells that can be used as magnetically retrievable supports for catalysts ,. For example, Tai et al.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Mesoporous SBA‐15 Functionalized with a NHC Pd(II) Complex: An Efficient and Recoverable Nanocatalyst for Hiyama Reaction

et al. 2019

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Magnetite nanoparticles (MNPs) were covered by a silica shell and then embedded into mesoporous silica . Magnetic mesoporous silica (Fe 3 O 4 @SiO 2 -SBA) was then reacted with 3chloropropyltriethoxysilane (CPTS), sodium salt of imidazole and 2-bromopyridine to give Fe 3 O 4 @SiO 2 -SBA functionalized with 3-(pyridin-2-yl)-1H-imidazol-3-ium-propyl (PIP) as a supported pincer ligand for Pd(II). The functionalized magnetic mesoporous silica were then treated with t-BuOK at À 80°C in THF and then reacted with [PdCl 2 (SMe 2 ) 2 ] to give supported Pd (II)-carbene complex containing C,N-bidentate ligand. The chloride ions were then exchanged by bromide ions using a NaBr solution of diethylether/acetone mixture. The prepared catalyst was characterized with, FT-IR, thermo gravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM), Brunauer-Emmett-Teller surface area measurement (S BET ), energy dispersive X-ray analysis (EDX) and wide angle X-ray diffraction spectroscopy (XRD). The prepared magnetic catalyst was effectively used in the coupling reaction of triethoxyphenylsilane with aryl halides (Hiyama reaction) in the presence of a base. The reaction parameters such as solvents, amount of catalyst, base and temperature were optimized. The catalyst was then magnetically decanted, washed, and reused several times.

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One-step and acid free synthesis of γ-Fe 2 O 3 /SBA-15 for enhanced arsenic removal

Cited by 41 publications

References 43 publications

Meso- and macroporous silica-based arsenic adsorbents: effect of pore size, nature of the active phase, and silicon release

Meso- and macroporous silica-based arsenic adsorbents: effect of pore size, nature of the active phase, and silicon release

A new Pd(II)‐supported catalyst on magnetic SBA‐15 for CC bond formation via the Heck and Hiyama cross‐coupling reactions

Magnetic Mesoporous SBA‐15 Functionalized with a NHC Pd(II) Complex: An Efficient and Recoverable Nanocatalyst for Hiyama Reaction

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