Synthesis and physicochemical properties of Zr-MCM-41 mesoporous molecular sieves and Pt/H3PW12O40/Zr-MCM-41 catalysts

Chen, L.F.; Wang, Jinan; Noreña, L.; Aguilar, José Francisco Gómez; Navarrete, Juan T. López; Salas, P.; Montoya, J.A.; Ángel, P. Del

doi:10.1016/j.jssc.2007.08.023

Cited by 54 publications

(17 citation statements)

References 41 publications

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“…Another peak at (13.3 ppm might indicate that the part of Keggin structure was deformed or distorted due to strong interactions with the support, but the fundamental Keggin structure was preserved. The results are in good agreement with the earlier reported one (24). As there was presence of two different structures of heteropolyacid inside the mesopores of MCM-41, TPA 2 / MCM-41 was not selected for carrying out detailed catalytic studies.…”

Section: Resultssupporting

confidence: 89%

An efficient green catalyst comprising 12-tungstophosphoric acid and MCM-41: synthesis characterization and diesterification of succinic acid, a potential bio-platform molecule

Brahmkhatri

Patel

2012

Green Chemistry Letters and Reviews

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Section: Resultssupporting

confidence: 89%

An efficient green catalyst comprising 12-tungstophosphoric acid and MCM-41: synthesis characterization and diesterification of succinic acid, a potential bio-platform molecule

Brahmkhatri

Patel

2012

Green Chemistry Letters and Reviews

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“…Usually, the pore shrinkage or enlargement of the sample after transition metals incorporation is related to the diameter of the transition metal ions. The pore size of the ZrMCM-41 sample can be increased due to the size of the Zr 4+ ion (r = 0⋅084 nm) is much larger than that of the Si 4+ ion (r = 0⋅026 nm), 17 this result suggests that the Zr ions are indeed inserted into the silica framework. In addition, the specific surface areas and the pore volumes of the samples decreased with the rise of the calcination temperature or the prolonging of hydrothermal treatment time, and the mesoporous ordering deteriorated.…”

Section: Nitrogen Adsorptionmentioning

confidence: 93%

Thermal and hydrothermal stability of ZrMCM-41 mesoporous molecular sieves obtained by microwave irradiation

Jiang

Zhou

et al. 2010

J Chem Sci

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ZrMCM-41 mesoporous molecular sieves were synthesized by using the zirconium sulfate as zirconium source and using cetyltrimethyl ammonium bromide as a template under microwave irradiation condition. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), inductive coupled plasma (ICP) technique, Fourier transform infrared spectroscopy (FT-IR) and N 2 physical adsorption, respectively. The effect of the different initial ZrO 2 : SiO 2 molar ratio, the different thermal treatment temperature and hydrothermal treatment time on textural property was investigated. The results show that the obtained products possess a typical mesoporous structure of MCM-41 and have specific surface areas in the range of 598⋅1~971⋅4 m 2 /g and average pore sizes in the range of ca. 2⋅46~3⋅43 nm. On the other hand, the BET specific surface area and pore volume of the synthesized ZrMCM-41 mesoporous molecular sieve decrease with the increased amount of zirconium incorporated in the starting material, the rise of thermal treatment temperature and the prolonging of hydrothermal treatment time, the mesoporous ordering deteriorates. The mesoporous structure of the ZrMCM-41 mesoporous molecular sieve still retains after calcination at 750°C for 3 h or hydrothermal treatment at 100°C for 6 days, however, the mesoporous ordering is poor.

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“…Two kinds of supported heteropolyacids were formed: (i) bulk-like heteropolyacid crystals with unchanged Keggin structures, and (ii) highly dispersed heteropolyacid with distorted Keggin units. The formation of various kinds of heteropolyacid structures is closely related to the interaction between the heteropolyanions and the hydroxyl groups in the host support [188].…”

Section: Synthesis and Physicochemical Properties Of Zr-mcm-41 Mesopomentioning

confidence: 99%

Recent developments in use of heteropolyacids, their salts and polyoxometalates in organic synthesis

Heravi

Sadjadi

2009

JICS

111

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Heteropolyacids, their salts and polyoxometalates have been used as catalysts in wide range of organic reactions such as multi components, oxidation, reductions, electrochemical and photochemical reactions. There have been tremendous and continued efforts to modify the catalytic performance of heteropoly acids such as supporting them on MCM, silica gel, etc. In this review, we have attempted to bring some of new applications of heteropolyacids in organic reactions and recent approaches on modifying them, into focus.

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Synthesis and physicochemical properties of Zr-MCM-41 mesoporous molecular sieves and Pt/H3PW12O40/Zr-MCM-41 catalysts

Cited by 54 publications

References 41 publications

An efficient green catalyst comprising 12-tungstophosphoric acid and MCM-41: synthesis characterization and diesterification of succinic acid, a potential bio-platform molecule

An efficient green catalyst comprising 12-tungstophosphoric acid and MCM-41: synthesis characterization and diesterification of succinic acid, a potential bio-platform molecule

Thermal and hydrothermal stability of ZrMCM-41 mesoporous molecular sieves obtained by microwave irradiation

Recent developments in use of heteropolyacids, their salts and polyoxometalates in organic synthesis

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