简介概要

Defects and interface states related photocatalytic properties in reduced and subsequently nitridized Fe3O4/TiO2

来源期刊:JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第6期

论文作者:Chang Liu Xiang Zhu Peng Wang Yisen Zhao Yongqing Ma

文章页码:931 - 941

摘    要:The Fe3O4@TiO2 catalyst was reduced in a mixed H2/N2 atmosphere at temperatures of 400, 600, 800 and 1000?C in order to produce the oxygen vacancies(Ov) and Ti3+; Simultaneously, Fe3O4 was reduced to Fe, a strongly magnetic material, beneficial for the magnetic separation after the photo-degradation.The optimal catalyst was obtained at the reducing temperature of 800?C, which possesses the good photocatalytic performance and recycled activities; Moreover, its saturation magnetization Msis highest,reaching 23.8 emu g-1 which improves the magnetic separability. This optimal catalyst was subsequently treated in the NH3 atmosphere at temperatures of 500, 600 and 700?C, aiming to investigate the effects of N-doping in TiO2. The 600?C treated catalyst exhibited the optimal photocatalytic performance. The factors that affect the photocatalytic performance are revealed and discussed in detail, including the ratio of Ovand N dopant in TiO2 as well as the interface states between TiO2 and the magnetic particles.

详情信息展示

Defects and interface states related photocatalytic properties in reduced and subsequently nitridized Fe3O4/TiO2

Chang Liu,Xiang Zhu,Peng Wang,Yisen Zhao,Yongqing Ma

Anhui Key Laboratory of Information Materials and Devices, School of Physics and Materials Science, Anhui University

摘 要:The Fe3O4@TiO2 catalyst was reduced in a mixed H2/N2 atmosphere at temperatures of 400, 600, 800 and 1000?C in order to produce the oxygen vacancies(Ov) and Ti3+; Simultaneously, Fe3O4 was reduced to Fe, a strongly magnetic material, beneficial for the magnetic separation after the photo-degradation.The optimal catalyst was obtained at the reducing temperature of 800?C, which possesses the good photocatalytic performance and recycled activities; Moreover, its saturation magnetization Msis highest,reaching 23.8 emu g-1 which improves the magnetic separability. This optimal catalyst was subsequently treated in the NH3 atmosphere at temperatures of 500, 600 and 700?C, aiming to investigate the effects of N-doping in TiO2. The 600?C treated catalyst exhibited the optimal photocatalytic performance. The factors that affect the photocatalytic performance are revealed and discussed in detail, including the ratio of Ovand N dopant in TiO2 as well as the interface states between TiO2 and the magnetic particles.

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