Synthesis of zirconium modified FDU-12 by different methods and its application in dibenzothiophene hydrodesulfurization

Meng, Qian; Du, Peng; Wang, Bo; Duan, Aijun; Chen, Xu; Zhang, Zhao; Liu, Cong; Hu, Di; Li, Yuyang; Xiao, Chengkun

doi:10.1039/c8ra05032e

Cited by 15 publications

(17 citation statements)

References 47 publications

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“…In the pristine FDU-12 spectrum (Fig. 2 a), the bands at 463, 810, and 1078 cm −1 are attributed to the Si–O–Si vibrations which are in agreement with previous reports 33 , 34 , 55 . The broadband around 3435 cm −1 corresponds to O–H stretching of the surface silanol groups and physically adsorbed water molecules.…”

Section: Resultssupporting

confidence: 91%

Molecular separation of ions from aqueous solutions using modified nanocomposites

Ghaforinejad

Mazaheri

Marjani

2021

Sci Rep

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Herein, two novel porous polymer matrix nanocomposites were synthesized and used as adsorbents for heavy metal uptake. Methacrylate-modified large mesoporous silica FDU-12 was incorporated in poly(methyl methacrylate) matrix through an in-situ polymerization approach. For another, amine-modified FDU-12 was composited with Nylon 6,6 via a facile solution blending protocol. Various characterization techniques including small-angle X-ray scattering, FTIR spectroscopy, field emission-scanning electron microscopy, transmission electron microscopy, porosimetry, and thermogravimetric analysis have been applied to investigate the physical and chemical properties of the prepared materials. The adsorption of Pb(II) onto the synthesized nanocomposites was studied in a batch system. After study the effect of solution pH, adsorbent amount, contact time, and initial concentration of metal ion on the adsorption process, kinetic studies were also conducted. For both adsorbents, the Langmuir and pseudo-second-order models were found to be the best fit to predict isotherm and kinetics of adsorption. Based on the Langmuir model, maximum adsorption capacities of 105.3 and 109.9 mg g−1 were obtained for methacrylate-modified FDU-12/poly(methyl methacrylate) and amine-modified FDU-12/Nylon 6,6, respectively.

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Section: Resultssupporting

confidence: 91%

Molecular separation of ions from aqueous solutions using modified nanocomposites

Ghaforinejad

Mazaheri

Marjani

2021

Sci Rep

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“…In the case of pristine FDU-12, the bands at 463 and 810 cm −1 are attributed to the bending and symmetric stretching vibration of Si–O–Si. Also, the band at 1078 cm −1 corresponds to the asymmetric stretching vibration of the Si–O–Si bond [ 28 , 43 ]. The broadband around 3435 cm −1 corresponds to O–H stretching of the surface silanol groups and the physically adsorbed water molecules.…”

Section: Resultsmentioning

confidence: 99%

“…The FE-SEM images of pristine FDU-12, FDU-12-MA, FDU-12-TA, FDU-12-MA/PMMA, and FDU-12-TA/NY6 are shown in Fig 2 . The FE-SEM image of the pristine FDU-12 and modified samples (FDU-12-MA, FDU-12-TA) showed a relatively regular hexagonal prism morphology which is a typical characteristic morphology of FDU-12 [ 43 , 48 ]. This indicates that the morphology of the FDU-12 was retained after modification with the used silane coupling agents.…”

Section: Resultsmentioning

confidence: 99%

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Study on novel modified large mesoporous silica FDU-12/polymer matrix nanocomposites for adsorption of Pb(II)

2021

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In this study, porous methacrylate-modified FDU-12/poly(methyl methacrylate) and amine-modified FDU-12/Nylon 6 nanocomposites were synthesized via a facile solution casting protocol. The physicochemical properties of the prepared materials were studied using various characterization techniques including Fourier transform-infrared spectroscopy, field emission-scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption/desorption. After characterization of the materials, the prepared nanocomposites were applied as novel adsorbents for the removal of Pb(II) from aqueous media. In this regard, the effect of various parameters including solution pH, adsorbent amount, contact time, and initial concentration of Pb(II) on the adsorption process was investigated. To study the mechanism of adsorption, kinetic studies were conducted. The kinetic models of pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion were employed. The results revealed that the adsorption of Pb(II) onto methacrylate-modified FDU-12/poly(methyl methacrylate) and amine-modified FDU-12/Nylon 6 adsorbents followed the pseudo-second-order kinetic model. Also, different isotherms including Langmuir, Freundlich, and Dubinin-Radushkevich were applied to evaluate the equilibrium adsorption data. Langmuir isotherm provided the best fit with the equilibrium data of both adsorbents with maximum adsorption capacities of 99.0 and 94.3 mg g-1 for methacrylate-modified FDU-12/poly(methyl methacrylate) and amine-modified FDU-12/Nylon 6, respectively, for the removal of Pb(II).

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“…FDU-12 is a type of 3D mesoporous material with a cage-like face-centered cubic mesostructure which has been attracted increasing attention as supports for HDS in recent years (Hu et al 2020;Meng et al 2018;Wu et al 2018b;Li et al 2018bLi et al , 2019Liu et al 2016Liu et al , 2017Wang et al 2017;Zhang et al 2017;Du et al 2016). For example, FDU-12based micro-and mesoporous composites (Wu et al 2018b;Li et al 2018b;Du et al 2016), Ti-or Zr-modified FDU-12 (Meng et al 2018;Cao et al 2014), etc. were successively developed, showing a high HDS efficiency due to the appropriate synergistic effect of pore properties and acid property.…”

Section: Introductionmentioning

confidence: 99%

Effects of pore size, mesostructure and aluminum modification on FDU-12 supported NiMo catalysts for hydrodesulfurization

et al. 2020

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A series of NiMo/FDU-12 catalysts with tunable pore diameters and mesostructures have been controllably synthesized by adjusting the synthetic hydrothermal temperature and applied for the hydrodesulfurization of dibenzothiophene and its derivative. The state-of-the-art electron tomography revealed that the pore sizes of FDU-12 supports were enlarged with the increase in the hydrothermal temperature and the mesostructures were transformed from ordered cage-type pores to locally disordered channels. Meanwhile, the MoS 2 morphology altered from small straight bar to semibending arc to spherical shape and finally to larger straight bar with the change of support structures. Among them, FDU-12 hydrothermally treated at 150 °C possessed appropriate pore diameter and connected pore structure and was favorable for the formation of highly active MoS 2 with curved morphology; thus, its corresponding catalyst exhibited the best HDS activity. Furthermore, it was indicated that the isomerization pathway could be significantly improved for HDS of 4,6-dimethyldibenzothiophene after the addition of aluminum, which was expected to be applied to the removal of the macromolecular sulfur compounds. Our study sheds lights on the relationship between support effect, active sites morphology and HDS performance, and also provides a guidance for the development of highly active HDS catalysts.

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Synthesis of zirconium modified FDU-12 by different methods and its application in dibenzothiophene hydrodesulfurization

Abstract: Zirconium modified mesoporous materials were successfully synthesized by different methods including direct synthesis and post synthesis (grafting and impregnating).

Cited by 15 publications

References 47 publications

Molecular separation of ions from aqueous solutions using modified nanocomposites

Molecular separation of ions from aqueous solutions using modified nanocomposites

Study on novel modified large mesoporous silica FDU-12/polymer matrix nanocomposites for adsorption of Pb(II)

Effects of pore size, mesostructure and aluminum modification on FDU-12 supported NiMo catalysts for hydrodesulfurization

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