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Recyclable Magnetic Titania Nanocomposite from Ilmenite with Enhanced Photocatalytic Activity  ( SCI-EXPANDED收录)   被引量:13

文献类型:期刊文献

英文题名:Recyclable Magnetic Titania Nanocomposite from Ilmenite with Enhanced Photocatalytic Activity

作者:Hong, Tianjie[1];Mao, Jun[1];Tao, Feifei[1,2];Lan, Mingxuan[1]

机构:[1]Shaoxing Univ, Dept Chem & Chem Engn, Shaoxing 312000, Peoples R China;[2]Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China

年份:2017

卷号:22

期号:12

外文期刊名:MOLECULES

收录:SCI-EXPANDED(收录号:WOS:000419242400014)、、Scopus(收录号:2-s2.0-85035348589)、WOS

基金:This manuscript was supported by National Natural Science Foundation of China (NSFC, grant Nos. 51372154 and 20901051), Project of Science Technology Department of Zhejiang Province of China (grant No. 2017C33209) and Science Foundation of Ministry of Housing and Urban-Rural Development of China (grant No. 2015-K4-003).

语种:英文

外文关键词:ilmenite; titania; nanocomposite; photocatalysis; magnetic recyclability

外文摘要:Using ilmenite as a raw material, iron was converted into Fe3O4 magnetic fluid, which further was combined with titanium filtrate by a solvothermal method. Finally Fe3O4/TiO2 nanocomposites with the uniform size of 100-200 nm were prepared. This approach uses rich, inexpensive ilmenite as a titanium and iron source, which effectively reduces the production cost. The crystal structure, chemical properties and morphologies of the products were characterized by SEM, TEM, XRD, FTIR, BET, UV-Vis, XPS and VSM. The novel photocatalyst composed of face-centered cubic Fe3O4 and body-centered tetragonal anatase-TiO2 exhibits a spherical shape with porous structures, superparamagnetic behavior and strong absorption in the visible light range. Using the degradation reaction of Rhodamine B (RhB) to evaluate the photocatalytic performance, the results suggest that Fe3O4/TiO2 nanocomposites exhibit excellent photocatalytic activities and stability under visible light and solar light. Moreover, the magnetic titania nanocomposites displayed good magnetic response and were recoverable over several cycles. Based on the trapping experiments, the main active species in the photocatalytic reaction were confirmed and the possible photocatalytic mechanism of RhB with magnetic titania was proposed. The enhanced photocatalytic activity and stability, combined with excellent magnetic recoverability, make the prepared nanocomposite a potential candidate in wastewater purification.

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