Various Morphology of Hierarchical Pore-Structured Compound: MCM-41/Diatomite and its Adsorption Behavior for Methylene Blue

Abstract:

Hierarchical porous materials attract considerable attentions due to their interesting structures and superior adsorption capabilities. In this work, a novel macro- and meso-porous hierarchical material, MCM-41/diatomite, has successfully been synthesized from natural diatomite and tetraethoxysilane by basic hydrothermal method. Nitrogen adsorption/desorption isotherms, low angle XRD and SEM analysis were carried out to character the multiple porous structure and morphology of MCM-41/diatomite. The resultant compound displayed high specific surface area (862~1041 m²/g) and macro-meso-porous hierarchical structure. The morphology of MCM-41/diatomite could be various, such as worm-like, grape-like, flocky, and acaleph-like, due to different ratio between TEOS, PEG, and NaOH. Moreover, the results of adsorption experiments show that some of the resultant MCM-41/diatomite display stronger adsorption capabilities than simply mesoporous MCM-41, due to the macro-meso-porous hierarchical structure, which would further extend the application of MCM-41/diatomite as adsorbent and catalyst support.

• Periodical: Advanced Materials Research (Volumes 690-693)
• Pages: 3533-3540
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.690-693.3533
• Online since: May 2013
• Authors: Fang Fei Li, Mao Sheng Xia, Yin Shan Jiang
• Keywords: Diatomite, Hierarchical, Macro-Meso-Porous, MCM-41, Morpholoy

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