Mesoporous CaO-ZrO2 nano-oxides: A novel solid base with high activity and stability

被引：64

作者：

Liu, Shuigang ^{[1
,2
]}

Ma, Jun ^{[1
,2
]}

Guan, Lianxiu ^{[1
,2
]}

Li, Junping ^{[1
]}

Wei, Wei ^{[1
]}

Sun, Yuhan ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2009年 / 117卷 / 1-2期

关键词：

CaO-ZrO2; Solid base; High stability; PROPYLENE CARBONATE; DIMETHYL CARBONATE; THERMAL-STABILITY; ZIRCONIA; CATALYSTS; SURFACE; ROUTE;

D O I：

10.1016/j.micromeso.2008.07.026

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A new solid base, mesoporous CaO-ZrO2 nano-oxides, was prepared via appropriate sol-gel process. It was found that such solid base showed high basicity and stability. Temperature programmed desorption of CO2 confirmed that both weak and strong basic sites coexisted on the surface of CaO-ZrO2 and the basicity could be modified by adjusting Ca/Zr molar ratio of the nano-oxides. The mesoporous CaO-ZrO2 nano-oxides showed high thermal stability, since X-ray diffraction (XRD) and transmission electron microscopies (TEM) proved that the mesoporous network of this material preserved well even up to 700 degrees C. At the same time, XRD and Raman spectra indicated that Ca2+ incorporated into t-ZrO2 lattice and the basic sites were firmly anchored to the substrate. As a result, this novel solid base showed remarkable activity and durability in the synthesis of dimethyl carbonate from methanol and propylene carbonate. (c) 2008 Published by Elsevier Inc.

引用

页码：466 / 471

页数：6

共 33 条

[1]

Atkins M. P., 1992, U.S. Patent, Patent No. 5110992

[2] Controlled formation of amine-templated mesostructured zirconia with remarkably high thermal stability [J].

Cassiers, K ;

Linssen, T ;

Aerts, K ;

Cool, P ;

Lebedev, O ;

Van Tendeloo, G ;

Van Grieken, R ;

Vansant, EF .

JOURNAL OF MATERIALS CHEMISTRY, 2003, 13 (12) :3033-3039

[3] A new strategy towards ultra stable mesoporous titania with nanosized anatase walls [J].

Cassiers, K ;

Linssen, T ;

Meynen, V ;

Van der Voort, P ;

Cool, P ;

Vansant, EF .

CHEMICAL COMMUNICATIONS, 2003, (10) :1178-1179

[4] A composite surfactant route for the synthesis of thermally stable and hierarchically porous zirconia with a nanocrystallized framework [J].

Chen, HR ;

Gu, JL ;

Shi, JL ;

Liu, ZC ;

Gao, JH ;

Ruan, ML ;

Yan, DS .

ADVANCED MATERIALS, 2005, 17 (16) :2010-+

[5]

DE GJ, 2002, CHEM REV, V12, P4093

[6] Solid base for hydrogen sulfide removal in light oil [J].

Duan, YF ;

Xia, DH ;

Xiang, YZ ;

Zhang, ZW .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2005, 281 (01) :197-200

[7] Nanostructured oxides in chemistry:: Characterization and properties [J].

Fernández-García, M ;

Martínez-Arias, A ;

Hanson, JC ;

Rodriguez, JA .

CHEMICAL REVIEWS, 2004, 104 (09) :4063-4104

[8] IR study of adsorption and reaction of methylbutynol on the surface of pure and modified MgO catalysts:: probing the catalyst surface basicity [J].

Fouad, NE ;

Thomasson, P ;

Knözinger, H .

APPLIED CATALYSIS A-GENERAL, 2000, 194 :213-225

[9] BASE CATALYSIS BY ALKALI-MODIFIED ZEOLITES .1. CATALYTIC ACTIVITY [J].

HATHAWAY, PE ;

DAVIS, ME .

JOURNAL OF CATALYSIS, 1989, 116 (01) :263-278

[10] Solid base catalysts: generation of basic sites and application to organic synthesis [J].

Hattori, H .

APPLIED CATALYSIS A-GENERAL, 2001, 222 (1-2) :247-259

← 1 2 3 4 →