title: Fe3 O4 Anisotropic Nanostructures in Hydrogels: Efficient Catalysts for the Rapid Removal of Organic Dyes from Wastewater.
abstract: Fe3 O4 anisotropic nanostructures that exhibit excellent catalytic performance are rarely used to catalyze Fenton-like reactions because of the inevitable drawbacks resulting from traditional preparation methods. In this study, a facile, nontoxic, water-based approach is developed for directly regulating a series of anisotropic morphologies of Fe3 O4 nanostructures in a hydrogel matrix. In having the advantages of both the catalytic activity of Fe3 O4 and the adsorptive capacity of an anionic polymer network, the hybrid nanocomposites have the capability to effect the rapid removal of cationic dyes, such as methylene blue, from water samples. Perhaps more interestingly, hybrid nanocomposites loaded with Fe3 O4 nanorods exhibit the highest catalytic activity compared to those composed of nanoneedles and nanooctahedra, revealing the important role of nanostructure morphology. By means of scanning electrochemical microscopy, it is revealed that Fe3 O4 nanorods can efficiently catalyze H2 O2 decomposition and thus generate more free radicals ((.) OH, (.) HO2 ) for methylene blue degradation, which might account for their high catalytic activity.
authors.affiliation: School of Science, State Key Laboratory for Mechanical Behavior of Materials, Collaborative Innovation Center of Suzhou Nano Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.|State Key Laboratory for Strength and Vibration of Mechanical Structures, International Center for Applied Mechanics and School of Aerospace, Xi'an Jiaotong University, Xi'an, 710049, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Gao
authors.affiliation: School of Science, State Key Laboratory for Mechanical Behavior of Materials, Collaborative Innovation Center of Suzhou Nano Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.|State Key Laboratory for Strength and Vibration of Mechanical Structures, International Center for Applied Mechanics and School of Aerospace, Xi'an Jiaotong University, Xi'an, 710049, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Hu
authors.affiliation: School of Science, State Key Laboratory for Mechanical Behavior of Materials, Collaborative Innovation Center of Suzhou Nano Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.|State Key Laboratory for Strength and Vibration of Mechanical Structures, International Center for Applied Mechanics and School of Aerospace, Xi'an Jiaotong University, Xi'an, 710049, China.
authors.forename: Wen Jiang
authors.initials: WJ
authors.lastname: Zheng
authors.affiliation: School of Science, State Key Laboratory for Mechanical Behavior of Materials, Collaborative Innovation Center of Suzhou Nano Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.
authors.forename: Sen
authors.initials: S
authors.lastname: Yang
authors.affiliation: School of Science, State Key Laboratory for Mechanical Behavior of Materials, Collaborative Innovation Center of Suzhou Nano Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Li
authors.affiliation: School of Science, State Key Laboratory for Mechanical Behavior of Materials, Collaborative Innovation Center of Suzhou Nano Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China.
authors.forename: Shao Dong
authors.initials: SD
authors.lastname: Sun
authors.affiliation: Laboratory of Nanochemistry, Department of Biophysics and Radiation Biology, Semmelweis University, H-1084, Budapest, Nagyvárad tér 4, Hungary.
authors.forename: Miklós
authors.initials: M
authors.lastname: Zrínyi
authors.affiliation: RIKEN 2-1, Semmelweis University, Hirosawa, Wako, Saitama, 351-0198, Japan.
authors.forename: Yoshihito
authors.initials: Y
authors.lastname: Osada
authors.affiliation: School of Science, State Key Laboratory for Mechanical Behavior of Materials, Collaborative Innovation Center of Suzhou Nano Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China. zmyang@mail.xjtu.edu.cn.
authors.forename: Zhi Mao
authors.initials: ZM
authors.lastname: Yang
authors.affiliation: School of Science, State Key Laboratory for Mechanical Behavior of Materials, Collaborative Innovation Center of Suzhou Nano Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China. chenym@mail.xjtu.edu.cn.|State Key Laboratory for Strength and Vibration of Mechanical Structures, International Center for Applied Mechanics and School of Aerospace, Xi'an Jiaotong University, Xi'an, 710049, China. chenym@mail.xjtu.edu.cn.
authors.forename: Yong Mei
authors.initials: YM
authors.lastname: Chen
keywords: Fe3O4 anisotropic nanostructures; catalytic activity; hydrogels; hydrogen peroxide; scanning electrochemical microscopy