TY - JOUR
T1 - Magnetic induced fabrication of core-shell structure Fe3O4@TiO2 photocatalytic membrane
T2 - Enhancing photocatalytic degradation of tetracycline and antifouling performance
AU - Cui, Yanhua
AU - Zheng, Jian
AU - Wang, Zengkai
AU - Li, Binrong
AU - Yan, Yongsheng
AU - Meng, Minjia
N1 - Publisher Copyright:
© 2021
PY - 2021/12
Y1 - 2021/12
N2 - How to endow the photocatalytic membrane with excellent efficiency and high permeability has always troubled scientific researchers. Herein, this work proposed an alternative strategy to controllably induce magnetic core-shell structured Fe3O4@TiO2 nanoparticles to move towards the membrane surface under magnetic field, significantly maintaining a high-water flow rate and enhancing the photocatalytic degradation efficiency. The presence of Fe3O4 in Fe3O4@TiO2 facilitates the electron-hole separation efficiency and maintains the high redox ability of photogenerated electrons in TiO2. The characterization results indicated the Fe3O4@TiO2 nanoparticles were successfully migrated to the membrane surface. As expected, the FTM(Y) had higher porosity (85.56%), higher pure water flux (1536.47 L m−2 h−1 bar−1) and better antifouling performance (5.24% of BSA static adsorption) than that of FTM(N) (1054.26 L m−2 h−1 bar−1, 6.62%). Meanwhile, the FTM(Y) exhibited excellent photocatalytic and self-cleaning activity, the FTM(Y) showed 1.3 times enhancement in visible light (λ > 420 nm) driven photocatalytic degradation efficiency of tetracycline compared to that of the FTM(N) without magnetically induced. The ·O2- and·OH radicals and photogenerated h+ played the primary role in photocatalytic degradation process. This work provides new insight into the design of highly efficient photocatalytic membrane to treat wastewater and enhance water purification.
AB - How to endow the photocatalytic membrane with excellent efficiency and high permeability has always troubled scientific researchers. Herein, this work proposed an alternative strategy to controllably induce magnetic core-shell structured Fe3O4@TiO2 nanoparticles to move towards the membrane surface under magnetic field, significantly maintaining a high-water flow rate and enhancing the photocatalytic degradation efficiency. The presence of Fe3O4 in Fe3O4@TiO2 facilitates the electron-hole separation efficiency and maintains the high redox ability of photogenerated electrons in TiO2. The characterization results indicated the Fe3O4@TiO2 nanoparticles were successfully migrated to the membrane surface. As expected, the FTM(Y) had higher porosity (85.56%), higher pure water flux (1536.47 L m−2 h−1 bar−1) and better antifouling performance (5.24% of BSA static adsorption) than that of FTM(N) (1054.26 L m−2 h−1 bar−1, 6.62%). Meanwhile, the FTM(Y) exhibited excellent photocatalytic and self-cleaning activity, the FTM(Y) showed 1.3 times enhancement in visible light (λ > 420 nm) driven photocatalytic degradation efficiency of tetracycline compared to that of the FTM(N) without magnetically induced. The ·O2- and·OH radicals and photogenerated h+ played the primary role in photocatalytic degradation process. This work provides new insight into the design of highly efficient photocatalytic membrane to treat wastewater and enhance water purification.
KW - Core-shell FeO@TiO
KW - Magnetic field
KW - Photocatalytic membrane
KW - Self-cleaning
UR - http://www.scopus.com/inward/record.url?scp=85119081721&partnerID=8YFLogxK
U2 - 10.1016/j.jece.2021.106666
DO - 10.1016/j.jece.2021.106666
M3 - 文章
AN - SCOPUS:85119081721
SN - 2213-3437
VL - 9
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
IS - 6
M1 - 106666
ER -