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Controlled Synthesis of Hollow ?-Fe2O3 Microspheres Assembled With Ionic Liquid for Enhanced Visible-Light Photocatalytic Activity.

ABSTRACT: Porous self-assembled ?-Fe2O3 hollow microspheres were fabricated via an ionic liquid-assisted solvothermal reaction and sequential calcinations. The concentration of the ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate [C4Mim]BF4) was found to play a crucial role in the control of these ?-Fe2O3 hollow structures. Trace amounts ionic liquid was used as the soft template to synthesize ?-Fe2O3 hollow spheres with a large specific surface (up to 220 m2/g). Based on time-dependent experiments, the proposed formation mechanisms were presented. Under UV light irradiation, the as-synthesized ?-Fe2O3 hollow spheres exhibited excellent photocatalysis in Rhodamine B (RhB) photodegradation and the rate constant was 2-3 times higher than ?-Fe2O3 particles. The magnetic properties of ?-Fe2O3 hollow structures were found to be closely associated with the shape anisotropy.

SUBMITTER: Yin H 

PROVIDER: S-EPMC6402386 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Controlled Synthesis of Hollow α-Fe<sub>2</sub>O<sub>3</sub> Microspheres Assembled With Ionic Liquid for Enhanced Visible-Light Photocatalytic Activity.

Yin Hang H   Zhao YuLing Y   Hua Qingsong Q   Zhang Jianmin J   Zhang Yuansai Y   Xu Xijin X   Long Yunze Y   Tang Jie J   Wang Fengyun F  

Frontiers in chemistry 20190227

Porous self-assembled α-Fe<sub>2</sub>O<sub>3</sub> hollow microspheres were fabricated via an ionic liquid-assisted solvothermal reaction and sequential calcinations. The concentration of the ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate [C<sub>4</sub>Mim]BF<sub>4</sub>) was found to play a crucial role in the control of these α-Fe<sub>2</sub>O<sub>3</sub> hollow structures. Trace amounts ionic liquid was used as the soft template to synthesize α-Fe<sub>2</sub>O<sub>3</sub> hollow  ...[more]

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