A1 Journal article (refereed)
Design and preparation of core-shell structured magnetic graphene oxide@MIL-101(Fe) : Photocatalysis under shell to remove diazinon and atrazine pesticides (2020)
Fakhri, H., Farzadkia, M., Boukherroub, R., Srivastava, V., & Sillanpää, M. (2020). Design and preparation of core-shell structured magnetic graphene oxide@MIL-101(Fe) : Photocatalysis under shell to remove diazinon and atrazine pesticides. Solar Energy, 208, 990-1000. https://doi.org/10.1016/j.solener.2020.08.050
JYU authors or editors
Publication details
All authors or editors: Fakhri, Hanieh; Farzadkia, Mahdi; Boukherroub, Rabah; Srivastava, Varsha; Sillanpää, Mika
Journal or series: Solar Energy
ISSN: 0038-092X
eISSN: 1471-1257
Publication year: 2020
Volume: 208
Pages range: 990-1000
Publisher: Elsevier
Publication country: United Kingdom
Publication language: English
DOI: https://doi.org/10.1016/j.solener.2020.08.050
Publication open access: Not open
Publication channel open access:
Abstract
A magnetically separable support with core-shell morphology comprising amine-functionalized Fe3O4 wrapped with graphene oxide (AFG) was successfully prepared and used to support MIL-101(Fe). The ternary AFG@MIL-101(Fe) composite was investigated as a photo-Fenton catalyst for the degradation of recalcitrant diazinon (DIZ) and atrazine (ATZ) pesticides. After 105 min visible light irradiation, the AFG@30MIL-101(Fe) photocatalyst achieved 100 ± 1% and 81 ± 1% photocatalytic degradation efficiency for DIZ and ATZ pollutants, respectively. The recorded data indicated superior photocatalytic ability of the nanocomposite as compared to AF@30MIL-101(Fe) and MIL-101(Fe) photocatalysts for the removal of both pollutants. Total Organic Carbon (TOC) analysis revealed 84 ± 0.5% and 62 ± 0.5% mineralization for DIZ and ATZ, respectively. The obtained results of characterization and also photocatalytic behavior suggest enhanced conversion between Fe2+/Fe3+ as well as fast electron transfer through interlayers of graphene oxide in this unique core-shell structure. After assaying the adsorption performance of photocatalyst, it was found that ATZ adsorption was more pronounced than DIZ. Furthermore, radical quenching tests revealed radical dotOH radicals were the main oxidizing players in this process even though the contribution of other species cannot be ruled out. It is noteworthy that magnetic stability was well preserved after 4 consecutive photocatalytic cycles, suggesting that this work can be a guideline to prepare efficient and stable magnetic Fenton systems.
Keywords: atrazine; amines; graphene
Free keywords: photo-fenton system; MIL-101(Fe); diazinon; atrazine; amine-functionalized magnetite; graphene
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2020
JUFO rating: 2