Accelerated crystallization of zeolites via hydroxyl free radicals

Guodong Feng; Peng Cheng; Wenfu Yan; Mercedes Boronat; Xu Li; Ji-Hu Su; Jianyu Wang; Yi Li; Avelino Corma; Ruren Xu; Jihong Yu

doi:10.1126/science.aaf1559

Accelerated crystallization of zeolites via hydroxyl free radicals

Science. 2016 Mar 11;351(6278):1188-91. doi: 10.1126/science.aaf1559.

Authors

Guodong Feng¹, Peng Cheng¹, Wenfu Yan¹, Mercedes Boronat², Xu Li¹, Ji-Hu Su³, Jianyu Wang¹, Yi Li¹, Avelino Corma², Ruren Xu¹, Jihong Yu⁴

Affiliations

¹ State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, China.
² Instituto de Tecnologia Quimica, Universidad Politecnica de Valencia, Consejo Superior de Investigaciones Cientificas, Valencia, 46022, Spain.
³ Department of Modern Physics, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, China.
⁴ State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, China. jihong@jlu.edu.cn.

PMID: 26965626
DOI: 10.1126/science.aaf1559

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't