Synthesis of Fe3O4/C/TiO2Magnetic Photocatalyst via Vapor Phase Hydrolysis | Zendy

Fuzhi Shi | Zendy; Yaogang Li | Zendy; Qinghong Zhang | Zendy; Hongzhi Wang | Zendy

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Synthesis of Fe₃O₄/C/TiO₂Magnetic Photocatalyst via Vapor Phase Hydrolysis

Author(s) -

Fuzhi Shi,

Yaogang Li,

Qinghong Zhang,

Hongzhi Wang

Publication year - 2012

Publication title -

international journal of photoenergy

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.426

H-Index - 51

eISSN - 1687-529X

pISSN - 1110-662X

DOI - 10.1155/2012/365401

Subject(s) - anatase , photocatalysis , high resolution transmission electron microscopy , materials science , transmission electron microscopy , scanning electron microscope , mesoporous material , desorption , analytical chemistry (journal) , adsorption , chemical engineering , nuclear chemistry , nanotechnology , catalysis , chemistry , organic chemistry , engineering , composite material

A core/multi-shell-structured Fe3O4/C/TiO2 magnetic photocatalyst is prepared via vapor phase hydrolysis process. The as-synthesized core/multi-shell-structured composite is characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), high-resolution electron microscopy (HRTEM), N2 adsorption-desorption isotherm analyses, vibrating sample magnetometer (VSM), and ultraviolet-visible (UV-Vis) absorption spectroscopy. TEM and HRTEM show that well-crystallized anatase TiO2 nanocrystals are immobilized on the surface of as-prepared Fe3O4/C microspheres with dimensions around 200 nm. N2 adsorption-desorption isotherm analysis shows that the obtained photocatalyst exists disorderedly mesoporous structure. The photocatalytic efficiency of the catalyst in degradation of methylene blue is evaluated, and the Fe3O4/C/TiO2 photocatalyst with low TiO2 content (37%) has a relatively higher activity than commercial anatase TiO2. The intermediate carbon layer avoids the photodissolution of Fe3O4 effectively, and the recycling property is largely improved due to the existence of magnetic Fe3O4 core.

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