Journal
RSC ADVANCES
Volume 5, Issue 89, Pages 73126-73132Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra06362k
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Funding
- National Natural Science Foundation of China [51172218, 51372234, 21301187]
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Hierarchical flower-like Fe3O4@titanate microspheres with ultrathin nanosheets-assembled shell were fabricated via an effective step-by-step approach. Superparamagnetic Fe3O4 microspheres pre-formed were used as templates for perfect deposition of the following coatings. Silica middle layer was introduced by Stober method in order to direct the formation of amorphous titania coverage via the hydrolysis of tetraisopropyl titanate. Under alkaline hydrothermal environment, titanate nanosheets crystallized and grew in situ attaching on the surface of Fe3O4 spheres, generating the flower-like microspheres which exhibit excellent adsorption properties. Meanwhile, the hierarchical structures can be tailored by varying the hydrothermal temperature and alkalinity, and the roles of sodium hydroxide and hydrogen peroxide were proposed.
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