In situ Formed Fan-Shaped Nanowires in Biomorphic SiO2：A Multidimensional Composite of Hierarchical Porous Material and Organic Pollutant Adsorption Behavior

Fan-shaped SiO2 nanowires modified SiO2@C composites with a bio-inspired hierarchical porous structure and a high accessible surface area were prepared by in situ molten salt template method.The combination of biogenic hierarchical porous structure and one-dimensional nanostructure with similar feat...

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Bibliographic Details
Published in:Acta metallurgica sinica : English letters 2017-02, Vol.30 (2), p.104-112
Main Authors: Chen, Hui, Zhao, Lei, He, Xuan, Wang, Guang-Hui, Wang, Xi-Tang, Fang, Wei, Du, Xing
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Characterization and Evaluation of Materials
Chemistry and Materials Science
Corrosion and Coatings
Decomposition
Epidermis
Fourier transforms
Heat treatment
Investigations
Materials Science
Metallic Materials
Microscopy
Molten salts
Morphology
Nanotechnology
Nanowires
Nitrogen
Organometallic Chemistry
Pore size
Porous materials
Rice
Silicon dioxide
Spectroscopy/Spectrometry
Spectrum analysis
Temperature
Tribology
Wastewater treatment
Water treatment
Zinc chloride
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Summary:Fan-shaped SiO2 nanowires modified SiO2@C composites with a bio-inspired hierarchical porous structure and a high accessible surface area were prepared by in situ molten salt template method.The combination of biogenic hierarchical porous structure and one-dimensional nanostructure with similar features was successfully obtained by one-pot heat treatment in the presence of rice husk SiO2 with SiO2 acting as precursor and ZnCl2 acting as molten salt and growth template.A large amount of fan-shaped SiO2 nanowires with numerous tiny branches sprouting from the central nanowires were grown in the inter-porous epidermis and on the surface of rice husk SiO2 for temperatures up to 1200 ℃.The in situ ZnCl2 molten salt template base-growth mechanism is responsible for the initial formation of SiO2/ZnCl2 co-melting nanowires and the subsequent growth of fan-shaped SiO2 nanowires.The as-prepared samples have been successfully employed as organic absorbers with high efficiency in the field of wastewater treatment.
ISSN:1006-7191
2194-1289
DOI:10.1007/s40195-016-0525-8