Hydrothermal Synthesis and Analysis of Iodine-Containing Sodalite-16153
Hydrothermal Synthesis and Analysis of Iodine-Containing Sodalite-16153
复制标题
含碘方钠石-16153的水热合成与分析
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
J. McCloy
中科院分区：
文献类型：
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作者：
Saehwa Chong;Jacob A. Peterson;B. Riley;J. McCloy
Five process variables affecting hydrothermal synthesis of iodide sodalite, Na8Al6Si6O24I2, were investigated, including NaOH concentration, aging time, temperature, Al/Si ratio, and precursor concentration. X-ray powder diffraction was performed to characterize synthesized samples, and Rietveld refinement method was used to quantify the mass fractions of phases. Iodide sodalite yield increased, in general, as NaOH concentration, aging time, and temperature increased. Lowering the Al/Si ratio from 1 to 0.5 increased the formation of cancrinite. Diluting the precursor concentration in the mixed solution with water revealed that nepheline hydrate-1, a zeolite, formed rather than sodalite. This observation, along with the preferential formation of zeolite A in samples where no NaOH was added, suggests that mechanisms for transport of the ions and formation of the aluminosilicate frameworks vary with hydrothermal conditions. The model for the best synthesis conditions based on the four significant variables is presented.
