激进的
沸石
硅酸铝
解聚
结晶
氢氧化物
试剂
化学
热液循环
光化学
聚合
催化作用
无机化学
高分子化学
有机化学
化学工程
聚合物
工程类
作者
Guodong Feng,Peng Cheng,Wenfu Yan,Mercedes Boronat,Lina Xu,Ji‐Hu Su,Yunlong Wang,Yang Li,Avelino Corma,Ruren Xu,Jihong Yu
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2016-03-11
卷期号:351 (6278): 1188-1191
被引量:320
标识
DOI:10.1126/science.aaf1559
摘要
In the hydrothermal crystallization of zeolites from basic media, hydroxide ions (OH(-)) catalyze the depolymerization of the aluminosilicate gel by breaking the Si,Al-O-Si,Al bonds and catalyze the polymerization of the aluminosilicate anions around the hydrated cation species by remaking the Si,Al-O-Si,Al bonds. We report that hydroxyl free radicals (•OH) are involved in the zeolite crystallization under hydrothermal conditions. The crystallization processes of zeolites-such as Na-A, Na-X, NaZ-21, and silicalite-1-can be accelerated with hydroxyl free radicals generated by ultraviolet irradiation or Fenton's reagent.
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