Microwave-assisted reconstruction of Ni,Al hydrotalcite-like compounds
Microwave-assisted reconstruction of Ni,Al hydrotalcite-like compounds
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DOI：
10.1016/j.jssc.2008.02.003
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发表时间：
2008-05-01
影响因子：
3.3
通讯作者：
Rives, V.
中科院分区：
文献类型：
--
作者：
Benito, P.;Guinea, I.;Rives, V.
研究了微波辅助下Ni/Al摩尔比为2/1和3/1的Ni，Al类水滑石（HTIcs）的重构。将HTIC煅烧后获得的混合氧化物浸入含有碳酸盐、蒸馏水和NH3水溶液的三种不同溶液中，然后在微波辐射下在不同温度下加热增加的时间段。在处理过程中的结构的演变，其次是粉末X-射线衍射，FT-IR和可见-UV光谱和SEM和TEM显微镜。对于2/1样品，当煅烧的HTlcs在Na_2CO_3溶液中再水化时，在短时间内实现了原始层状结构的完全恢复，但对于3/1样品，需要更剧烈的条件，并且重建似乎不完全。最后，在蒸馏水或NH3水溶液中仅观察到部分重构。(C)2008年爱思唯尔公司All rights reserved.
The microwave-assisted reconstruction of Ni,Al hydrotalcite-like compounds (HTIcs) with Ni/Al molar ratios 2/1 and 3/1 has been studied. Mixed oxides obtained after calcination of the HTIcs are immersed in three different solutions containing carbonate, distilled water and an aqueous NH3 solution, and then heated at different temperatures for increasing periods of time under microwave radiation. The evolution of the structure during the treatment is followed by powder X-ray diffraction, FT-IR and vis-UV spectroscopies and SEM and TEM microscopies. Full recovery of the original layered structure is achieved in short periods of time for the 2/1 samples when the calcined HTlcs are rehydrated in the Na2CO3 Solution, but more drastic conditions are necessary for the 3/1 samples and the reconstruction seems not to be complete. Finally, only a partial reconstruction is observed in distilled water or NH3 aqueous solution. (C) 2008 Elsevier Inc. All rights reserved.