hydrotalcites calcined at different temperatures : Preparation , haracterization and photocatalytic activity in gas – solid regime
hydrotalcites calcined at different temperatures : Preparation , haracterization and photocatalytic activity in gas – solid regime
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2011
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.. Carriazoa-Carriazoa-2080712142;M. D. Arcoa;E. García-Lópezb;G. Marcìb;C. Martína;L. Palmisanob;V. Rivesa
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作者：
.. Carriazoa-Carriazoa-2080712142;M. D. Arcoa;E. García-Lópezb;G. Marcìb;C. Martína;L. Palmisanob;V. Rivesa
层状双氢氧化物（LDH）含有锌和铝的水镁石类层和碳酸根作为层间阴离子的层状双氢氧化物（LDH）已被用作通过煅烧制备混合金属氧化物的前体。氧化锌和ZnAl 2 O 4尖晶石形成有不同的结晶度，这取决于两个参数，即，Zn 2 +/Al 3+摩尔比和煅烧温度（500-800 ℃）在线可用2011年4月30日关键词：层状双氢氧化物光催化nAl 2 O 4 LDH前体。在800 ℃下煅烧的样品在NaOH溶液中进行碱性后处理后，获得纯尖晶石相以去除ZnO。所有的样品进行了测试的光降解2-丙醇在气-固制度。所有的样品作为非均相光催化剂都具有活性。随着Zn ~（2+）/Al ~（3+）摩尔比的增加和煅烧温度的升高，光催化活性增加。没有
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 ZnAl2O4 spinel were formed with different degree of crystallinity depending of two parameters, i.e., the Zn2+/Al3+ molar ratio and the calcination temperature (500–800 ◦C) of vailable online 30 April 2011 eywords: ayered double hydroxides hotocatalysis nAl2O4 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 ◦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 Zn2+/Al3+ molar ratio and the calcination temperature of the solids. nO