Zn,Al hydrotalcites calcined at different temperatures: Preparation, characterization and photocatalytic activity in gas-solid regime

被引：86

作者：

Carriazo, D. ^{[2
]}

del Arco, M. ^{[2
]}

Garcia-Lopez, E. ^{[1
]}

Marci, G. ^{[1
]}

Martin, C. ^{[2
]}

Palmisano, L. ^{[1
]}

Rives, V. ^{[2
]}

机构：

[1] Univ Palermo, Dipartimento Ingn Elettr Elettron & Telecomunicaz, Schiavello Grillone Photocatalysis Grp, I-90128 Palermo, Italy

[2] Univ Salamanca, Dept Quim Inorgan, GIR QUESCAT, E-37008 Salamanca, Spain

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2011年 / 342-43卷

关键词：

Layered double hydroxides; Photocatalysis; ZnAl(2)O(4); ZnO; POLYCRYSTALLINE ZNO/TIO2 SYSTEMS; LAYERED DOUBLE HYDROXIDES; BULK CHARACTERIZATION; ZINC ALUMINATE; SURFACE-AREA; DEGRADATION; CATALYSTS; PHOTODEGRADATION; NANOCRYSTALS; PRECURSORS;

D O I：

10.1016/j.molcata.2011.04.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Layered double hydroxides (LDH) containing zinc and aluminium within the brucite-like layers and carbonate as the interlayer anion have been used as precursors for the preparation of mixed metal oxides by calcination. Zinc oxide and the ZnAl(2)O(4) spinel were formed with different degree of crystallinity depending of two parameters, i.e., the Zn(2+)/Al(3+) molar ratio and the calcination temperature (500-800 degrees C) of the LDH precursor. A pure spinel phase was obtained to remove ZnO upon a basic post-treatment in NaOH solution of the samples calcined at 800 degrees C. All the samples were tested for the photodegradation of 2-propanol in gas-solid regime. All the samples resulted active as heterogeneous photocatalysts. The photocatalytic activity increased by increasing the Zn(2+)/Al(3+) molar ratio and the calcination temperature of the solids. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：83 / 90

页数：8

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[1] Photocatalytic oxidation of acetonitrile in gas-solid and liquid-solid regimes [J].