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首页> 外文期刊>RSC Advances >Hierarchical Fe3O4@titanate microspheres with superior removal capability for water treatment: in situ growth and structure tailoring via hydrothermal assisted etching
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Hierarchical Fe3O4@titanate microspheres with superior removal capability for water treatment: in situ growth and structure tailoring via hydrothermal assisted etching

机译：具有卓越的水处理去除能力的分层Fe3O4 @钛酸酯微球：通过水热辅助蚀刻的原位生长和结构定制

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摘要

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.
机译：通过有效的逐步方法制备了具有超薄纳米片组装壳的分层花状Fe3O4 @钛酸酯微球。预先形成的超顺磁性Fe3O4微球用作模板，以完美沉积以下涂层。通过斯托伯方法引入二氧化硅中间层，以通过钛酸四异丙酯的水解来引导无定形二氧化钛覆盖物的形成。在碱性水热环境下，钛酸盐纳米片在Fe3O4球的表面上结晶并原位生长，生成了花状微球，具有优异的吸附性能。同时，可以通过改变水热温度和碱度来调整分层结构，并提出了氢氧化钠和过氧化氢的作用。

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