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journal article·2022-04Open access

Influences of crystallization time and molar composition of hydrogel on the preparation of sodalite, cancrinite and analcime

Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Henan, 461000, China, X. Zhang, S. Jiang, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Henan, 461000, China, S. Liu, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Henan, 461000, China, L. Chen, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Henan, 461000, China, L. Tong, Institute of Surface Micro and Nano Materials, College of Chemical and Materials Engineering, Xuchang University, Henan, 461000, China

Digest Journal of Nanomaterials and Biostructures· Volume 17· Issue 2
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Abstract

Sodalite, cancrinite and analcime were synthesized via hydrothermal processes, the influences of crystallization time and molar composition of hydrogel on the crystalline end products were investigated. The results revealed that with the prolongation of crystallization time from 3 min to 80 min, the crystallization followed a sequence of phase transformations from amorphous to zeolite NaA, sodalite and cancrinite. Well-crystallized cancrinite crystals were achieved at Al2O3/SiO2 molar ratios of 0.12, 0.34 and 0.76. However, with the Al2O3/SiO2 molar ratio was increased to 0.95, pure-form sodalite was formed. A gradual increase in the crystallinity of cancrinite was observed with increasing H2O/SiO2 molar ratio, while too high H2O/SiO2 resulted in analcime generated. Also, when the Na2O/SiO2 molar ratios of the hydrogel were 0.70, 1.22 and 4.75, the corresponding products obtained were pure phases of analcime, cancrinite and sodalite, respectively
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Research context

Polymers

OpenAlex topics: Mesoporous Materials and Catalysis · Zeolite Catalysis and Synthesis · Clay minerals and soil interactions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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