Synthesis of Large Single Crystals of Silica-sodalite and Silicalite-1 in the Presence of Pyrocatechol

Chem. J. Chinese Universities ›› 1999, Vol. 20 ›› Issue (11): 1667.

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Synthesis of Large Single Crystals of Silica-sodalite and Silicalite-1 in the Presence of Pyrocatechol

SHAO Chang-Lu¹, LI Xiao-Tian¹, QIU Shi-Lun¹, XIAO Feng-Shou¹, ZHANG Zong-Tao¹, WEI Bo¹, WANG Run-Wei¹, YUE Yong²

1. Department of Chemistry and Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130023, China;
2. Wuhan Institute of Physics, Chinese Academy of Sciences, Wuhan 430000, China

Received:1998-12-17 Online:1999-11-24 Published:1999-11-24

Abstract

Abstract: To obtain large perfect crystals of zeolites, pyrocatechol as an additive was added into the two system: SiO₂-NaOH-EG-R and SiO₂-TPABr-NaOH-R-H₂O (R: pyrocatechol, EG: ethylene glycol). Experimental results showed that the crystals synthesized in the presence of pyrocatechol have much larger size and better morphology than those synthesized in the absence of pyrocatechol. The role of pyrocatechol in the hydrothermal reaction mixture has been characterized by ²⁹SiNMR, IR, and UV-V is spectroscopy, and it was shown that silicon pyrocatechol complex was formed in the reaction system.

Key words: Silica-sodalite, Silicalite-1, Large single crystals, Pyrocatechol, Silicon-pyrocatechol complex

CLC Number:

O614

TrendMD:

SHAO Chang-Lu, LI Xiao-Tian, QIU Shi-Lun, XIAO Feng-Shou, ZHANG Zong-Tao, WEI Bo, WANG Run-Wei, YUE Yong . Synthesis of Large Single Crystals of Silica-sodalite and Silicalite-1 in the Presence of Pyrocatechol[J]. Chem. J. Chinese Universities, 1999, 20(11): 1667.

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Synthesis of Large Single Crystals of Silica-sodalite and Silicalite-1 in the Presence of Pyrocatechol

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