Mesoporous zirconosilicate doughnuts with high performance in liquid oxidative dehydrogenation of hydroquinone to quinone

Research output: Contribution to journalArticle

Abstract

Unusual partially crystalline ordered mesoporous zirconosilicate doughnuts with Si/Zr ratio as low as 1.5 were synthesized from the aqueous polymerisation of a single source molecular precursor Zr[OSi(Ot-BuO) ] without the use of any templating agent. A radial homogenous mesoporosity (4nm) was observed inside these very regular sub-micrometric (600nm) doughnuts. These structures were partially crystallized in hydrothermal conditions (100°C) into an analogous zircon (ZrSiO ) framework. The formation mechanism has been investigated. It is evidenced that chlorine anions Cl concentration and pH value are essential to achieve the process, even if their role is still a matter of investigations. The obtained materials demonstrated even higher catalytic activity, selectivity and stability in the liquid oxidative dehydrogenation of hydroquinone to 1,4-benzoquinone compared to TS-1 zeolite catalysts and amorphous highly ordered mesoporous zirconosilicate materials.
Original languageEnglish
Pages (from-to)25-32
Number of pages8
JournalOptics Letters
Volume361
Issue number1
DOIs
Publication statusPublished - 1 Sep 2011

Fingerprint

quinones
dehydrogenation
chlorine
catalytic activity
polymerization
selectivity
anions
catalysts
liquids

Cite this

@article{87d031ccf45b4f008a3b6a3ee0fe74db,
title = "Mesoporous zirconosilicate doughnuts with high performance in liquid oxidative dehydrogenation of hydroquinone to quinone",
abstract = "Unusual partially crystalline ordered mesoporous zirconosilicate doughnuts with Si/Zr ratio as low as 1.5 were synthesized from the aqueous polymerisation of a single source molecular precursor Zr[OSi(Ot-BuO) ] without the use of any templating agent. A radial homogenous mesoporosity (4nm) was observed inside these very regular sub-micrometric (600nm) doughnuts. These structures were partially crystallized in hydrothermal conditions (100°C) into an analogous zircon (ZrSiO ) framework. The formation mechanism has been investigated. It is evidenced that chlorine anions Cl concentration and pH value are essential to achieve the process, even if their role is still a matter of investigations. The obtained materials demonstrated even higher catalytic activity, selectivity and stability in the liquid oxidative dehydrogenation of hydroquinone to 1,4-benzoquinone compared to TS-1 zeolite catalysts and amorphous highly ordered mesoporous zirconosilicate materials.",
author = "A. Lemaire and B.-L. Su",
year = "2011",
month = "9",
day = "1",
doi = "10.1016/j.jcis.2011.05.065",
language = "English",
volume = "361",
pages = "25--32",
journal = "Optics Letters",
issn = "0146-9592",
publisher = "The Optical Society",
number = "1",

}

TY - JOUR

T1 - Mesoporous zirconosilicate doughnuts with high performance in liquid oxidative dehydrogenation of hydroquinone to quinone

AU - Lemaire, A.

AU - Su, B.-L.

PY - 2011/9/1

Y1 - 2011/9/1

N2 - Unusual partially crystalline ordered mesoporous zirconosilicate doughnuts with Si/Zr ratio as low as 1.5 were synthesized from the aqueous polymerisation of a single source molecular precursor Zr[OSi(Ot-BuO) ] without the use of any templating agent. A radial homogenous mesoporosity (4nm) was observed inside these very regular sub-micrometric (600nm) doughnuts. These structures were partially crystallized in hydrothermal conditions (100°C) into an analogous zircon (ZrSiO ) framework. The formation mechanism has been investigated. It is evidenced that chlorine anions Cl concentration and pH value are essential to achieve the process, even if their role is still a matter of investigations. The obtained materials demonstrated even higher catalytic activity, selectivity and stability in the liquid oxidative dehydrogenation of hydroquinone to 1,4-benzoquinone compared to TS-1 zeolite catalysts and amorphous highly ordered mesoporous zirconosilicate materials.

AB - Unusual partially crystalline ordered mesoporous zirconosilicate doughnuts with Si/Zr ratio as low as 1.5 were synthesized from the aqueous polymerisation of a single source molecular precursor Zr[OSi(Ot-BuO) ] without the use of any templating agent. A radial homogenous mesoporosity (4nm) was observed inside these very regular sub-micrometric (600nm) doughnuts. These structures were partially crystallized in hydrothermal conditions (100°C) into an analogous zircon (ZrSiO ) framework. The formation mechanism has been investigated. It is evidenced that chlorine anions Cl concentration and pH value are essential to achieve the process, even if their role is still a matter of investigations. The obtained materials demonstrated even higher catalytic activity, selectivity and stability in the liquid oxidative dehydrogenation of hydroquinone to 1,4-benzoquinone compared to TS-1 zeolite catalysts and amorphous highly ordered mesoporous zirconosilicate materials.

UR - http://www.scopus.com/inward/record.url?scp=79959784737&partnerID=8YFLogxK

U2 - 10.1016/j.jcis.2011.05.065

DO - 10.1016/j.jcis.2011.05.065

M3 - Article

VL - 361

SP - 25

EP - 32

JO - Optics Letters

JF - Optics Letters

SN - 0146-9592

IS - 1

ER -