铁酸镍负载TiO2的可磁分离光催化剂的制备及性能

O6; A magnetically separable photocatalyst TiO2/SiO2/NiFe2O4 (TSN) with a typical ferromagnetic hysteresis was prepared by a liquid catalytic phase transfer method.When the intensity of applied magnetic field weakened to zero,the remnant magnetism of the prepared photocatalyst faded to zero.The phot...

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Published in中国化学工程学报（英文版） Vol. 15; no. 2; pp. 190 - 195
Main Authors 许士洪, 上官文峰, 袁坚, 陈铭夏, 施建伟
Format Journal Article
LanguageChinese
Published Research Center for Combustion and Environment Technology,School of Mechanical and Power Engineering,Shanghai Jiao Tong University,Shanghai 200030,China 2007
Subjects
nickel ferrite
magnetically separable
photocatalyst
TiO2
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ISSN1004-9541

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Summary:O6; A magnetically separable photocatalyst TiO2/SiO2/NiFe2O4 (TSN) with a typical ferromagnetic hysteresis was prepared by a liquid catalytic phase transfer method.When the intensity of applied magnetic field weakened to zero,the remnant magnetism of the prepared photocatalyst faded to zero.The photocatalytst can be separated from water when an external magnetic field is added and redispersed into aqueous solution after the external magnetic field is eliminated,that makes the photocatalysts promising for wastewater treatment.Transmission electron microscope (TEM) and X-ray diffractometer (XRD) were used to characterize the structure of the photocatalyst, indicating that the magnetic SiO2/NiFe2O4 (SN) particle was compactly enveloped by P-25 titania and TiO2 shell was formed.The magnetic composite showed high photocatalytic activity for the degradation of methyl orange in water.A thin SiO2 layer between NiFe2O4 and TiO2 shell prevented effectively the leakage of charges from TiO2 particles to NiFe2O4,which gav
ISSN:1004-9541