Nano-rod catalysts: Building MOF bottles (MIL-101 family as heterogeneous single-site catalysts) around vanadium oxide ships

Fazaeli, Razieh; Aliyan, Hamid; Moghadam, Majid; Masoudinia, M.

doi:10.1016/j.molcata.2013.03.020

Cited by 69 publications

(29 citation statements)

References 36 publications

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“…A slight shift of the primary peak occurs at higher 2h values after impregnation. In addition, the decreased intensities of the reflections indicate that the adopted synthesis procedure yields less ordered materials, a partial structural collapse of the pores and decreased electron density contrast compared to traditional LSM, as previously observed for in V/SBA [34] V/MIL-101 [35] and V/MCF [36] systems. As TEM and N 2 adsorption data show, however, the arrangement of the LSM frameworks is still stays well retained after incorporation of vanadia.…”

Section: Physico-chemical Characterizationsupporting

confidence: 67%

Nanorice-shaped mesoporous V/RSM as an efficient and reusable catalyst for biodiesel production from soybean oil

Fazaeli

Aliyan

2015

J Sol-Gel Sci Technol

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Sol-gel method was used to synthesize a nanorice-shaped mesoporous V/RSM, which was characterized by FTIR, XRD, BET, UV-Vis and TEM. The mesostructure of silica remains intact after following vanadium modification, as shown by absorption-desorption analysis, while spectral techniques indicate the successful immobilization of the neat vanadium oxide inside the porous silica support. Furthermore, soybean oil was has been used as the feedstock in the preparation of biodiesel by V/RSM-catalyzed transesterification process. Various reaction parameters, including methanol/oil molar ratio, reaction time, catalyst mass and reaction temperature, were studied investigated with regard to their effect on the reaction. A remarkable conversion of 94 % was obtained achieved using a 8 % (wt/wt oil) of V(4.8)/RSM catalyst, methanol/oil molar ratio of 12:1 and reflux temperature of methanol during 8 h. The solid catalyst can be reused over at least six cycles under mild conditions. Graphical abstractKeywords Biodiesel Á Vegetable oil Á Supported vanadia catalyst Á Rice-shaped mesoporous (RSM)

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Section: Physico-chemical Characterizationsupporting

confidence: 67%

Nanorice-shaped mesoporous V/RSM as an efficient and reusable catalyst for biodiesel production from soybean oil

Fazaeli

Aliyan

2015

J Sol-Gel Sci Technol

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“…The strong bands in the region 1800–1300 cm −1 and the weak ones in the range 700–400 cm −1 are assigned to the different stretching and bending vibrations of the COO groups, respectively, indicating the presence of H 2 BDC linker in the UiO-66 framework. Especially, the band at 550 cm −1 was assigned to the Zr–O vibrations, confirming the formation of UiO-66 MOFs [41]. The spectra of the 40 wt % WO 3 /UiO-66 samples show the characteristic peak of WO x species at 940 cm −1 , as well as the characteristic infrared bands corresponding to UiO-66 (Fig.…”

Section: Resultsmentioning

confidence: 82%

Modification Effects of B2O3 on The Structure and Catalytic Activity of WO3-UiO-66 Catalyst

Yang

Miao

et al. 2018

Nanomaterials

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Tungsten oxide (WO3) and boron oxide (B2O3) were irreversibly encapsulated into the nanocages of the Zr-based metal organic framework UiO-66, affording a hybrid material B2O3-WO3/UiO-66 by a simple microwave-assisted deposition method. The novel B2O3-WO3/UiO-66 material was systematically characterized by X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption, ultraviolet–visible diffuse reflectance spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray phosphorescence, and Fourier transform infrared (FTIR)-CO adsorption methods. It was found that WO3 and B2O3 were highly dispersed in the nanocages of UiO-66, and the morphology and crystal structure of UiO-66 were well preserved. The B2O3 species are wrapped by WO3 species, thus increasing the polymeric degree of the WO3 species, which are mainly located in low-condensed oligomeric environments. Moreover, when compared with WO3/UiO-66, the B2O3-WO3/UiO-66 material has a little weaker acidity, which decreased by 10% upon the B2O3 introduction. The as-obtained novel material exhibits higher catalytic performance in the cyclopentene selective oxidation to glutaraldehyde than WO3/UiO-66. The high catalytic performance was attributed to a proper amount of B2O3 and WO3 with an appropriate acidity, their high dispersion, and the synergistic effects between them. In addition, these oxide species hardly leached in the reaction solution, endowing the catalyst with a good stability. The catalyst could be used for six reaction cycles without an obvious loss of catalytic activity.

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“…Two decades ago the terms, such as nanoparticle [6], nanopowder [7], nanotube [8] and nanoplate [9], in addition to other related shape-based terms, rapidly became very common. During the past few years the concerted efforts of researchers have led to reports of an enormous number of the nanostructure types mentioned above and to the discovery of rarer species, such as nanodumbbells [10], nanoflowers [11], nanorices [11], nanolines [12], nanotowers [13], nanoshuttles [14], nanobowlings [15], nanowheels [16], nanofans [17], nanopencils [18], nanotrees [19], nanoarrows [20], nanonails [21], nanobottles [22], nanovolcanoes [23] and nanobiopolymers [24], among many others. Development of nanotechnology provides the 0-3 dimensional [25] nanomaterials such as clusters, particles, nanotubes, nanowires, nanoplates, layers, core/shell nanoparticles or self-assembled massives, intermediate dimensional nanostructures such as fractals or dendrimers, or the classification based on the following triad: symmetry, group-shell, composition-structural formula of the shell.…”

Section: Introductionmentioning

confidence: 99%

“…Comparatively the high yield of pyrazolines was obtained in solvent-free condensation. UVvisible, infrared and NMR spectroscopical data of pyrazolines (entries [11][12][13][14][15][16][17][18][19][20][21][22] are presented in Table STVII (see supplementary data). …”

mentioning

confidence: 99%

Synthesis, Characterization and Synthetic Applications of Fly-ash:H3PO4 Nanocatalyst

Joseph¹,

Ranganathan²,

Suresh³

et al. 2017

Materials Science and Applied Chemistry

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-The solid acidic nanocatalyst fly-ash:H3PO4 was prepared and characterized by FT-IR, SEM, EDS and TEM analysis. This catalyst was utilized for aldol condensation, coupling and cyclization reaction. The effect of catalytic activity of this fly-ash:H3PO4 nanocatalyst was studied with the obtained yield of products under solvent-free conditions. In this synthetic reaction the obtained yields were more than 95 %.

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Nano-rod catalysts: Building MOF bottles (MIL-101 family as heterogeneous single-site catalysts) around vanadium oxide ships

Cited by 69 publications

References 36 publications

Nanorice-shaped mesoporous V/RSM as an efficient and reusable catalyst for biodiesel production from soybean oil

Nanorice-shaped mesoporous V/RSM as an efficient and reusable catalyst for biodiesel production from soybean oil

Modification Effects of B2O3 on The Structure and Catalytic Activity of WO3-UiO-66 Catalyst

Synthesis, Characterization and Synthetic Applications of Fly-ash:H3PO4 Nanocatalyst

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