Synthesis of γ-Ga2O3-Al2O3 solid solutions by the glycothermal method
Synthesis of γ-Ga2O3-Al2O3 solid solutions by the glycothermal method
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DOI：
10.1111/j.1551-2916.2006.01060.x
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发表时间：
2006-07-01
影响因子：
3.9
通讯作者：
Watanabe, Tsunenori
中科院分区：
文献类型：
--
作者：
Takahashi, Masaru;Inoue, Noriyuki;Watanabe, Tsunenori
异丙醇铝和乙酰丙酮镓的混合物在1，4-丁二醇或1，5-戊二醇中高温反应（糖热反应）直接得到γ-Ga 2 O3-Al 2 O3固溶体，该固溶体对甲烷选择性还原NO具有较高的催化活性。当Al/（Ga+Al）投料比增大时，反应副产物为勃姆石的乙二醇衍生物，固溶体的催化活性降低。因此，研究了使用各种二醇的固溶体的合成，并且发现通过使用1，6-己二醇作为反应介质，获得了具有高Al含量而没有勃姆石的二醇衍生物污染的固溶体。固溶体表现出较高的NO转化率比在其他二醇合成。
The reaction of mixtures of aluminum isopropoxide and gallium acetylacetonate in 1,4-butanediol or 1,5-pentanediol at high temperatures (glycothermal reaction) directly gave the gamma-Ga2O3-Al2O3 solid solutions, which had high catalytic activities for selective reduction of NO using methane as the reducing agent. However, the reaction with a higher Al/(Ga+Al) charged ratio yielded the glycol derivative of boehmite as a by-product and the catalytic activity of the solid solution decreased. Therefore, synthesis of the solid solution using various glycols was examined and it was found that solid solutions with high Al contents without contamination of the glycol derivative of boehmite were obtained by using 1,6-hexanediol as a reaction medium. The solid solution exhibited a higher NO conversion than that synthesized in other glycols.