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Thermal decomposition of hydrotalcite with hexacyanoferrate(II) and hexacyanoferrate(III) anions in the interlayer

机译:层间高铁酸根(II)和高铁酸根(III)阴离子对水滑石的热分解

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摘要

The thermal decompositions of hydrotalcites with hexacyanoferrate(II) and hexacyanoferrate(III) in the interlayer have been studied using thermogravimetry combined with mass spectrometery. X-ray diffraction shows the hydrotalcites have a d(003) spacing of 11.1 and 10.9 Å which compares with a d-spacing of 7.9 and 7.98 Å for the hydrotalcite with carbonate or sulphate in the interlayer. XRD was also used to determine the products of the thermal decomposition. For the hydrotalcite decomposition the products were MgO, Fe2O3 and a spinel MgAl2O4. Dehydration and dehydroxylation take place in three steps each and the loss of cyanide ions in two steps.
机译:结合热重分析和质谱法研究了水滑石在中间层中与六氰合铁酸酯(II)和六氰合铁酸酯(III)的热分解。 X射线衍射显示水滑石的d(003)间距为11.1和10.9Å,而中间层中有碳酸盐或硫酸盐的水滑石的d间距为7.9和7.98。 XRD还用于确定热分解的产物。对于水滑石分解,产物为MgO,Fe2O3和尖晶石MgAl2O4。脱水和脱羟基分别在三个步骤中进行,氰化物离子的损失在两个步骤中进行。

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