title: Green synthesis of Fe3O4 nanoparticles with controlled morphologies using urease and their application in dye adsorption.
abstract: This paper describes a simple and environmentally friendly method for the preparation of highly stable dispersions of Fe3O4 nanoparticles with controlled morphologies, in the same synthesis system for the first time. During the process, the Fe3O4 nanoparticles are formed using urease as a multifunctional reagent, including catalyst, template and dispersant, due to its enzymatic activity and special enzymatic steric structure. A possible formation mechanism for these Fe3O4 nanoparticles, which have various morphologies including nanospheres, nanosheets and nanorods, is proposed. The as-prepared nanoparticles show a larger specific surface area and a stronger magnetism, which enhances their dye adsorption capacity and increases their potential for application in wastewater treatment.
authors.affiliation: Laboratory of Controllable Preparation and Application of Nanomaterials, Research Center for Micro & Nano Materials and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China. mengxw@mail.ipc.ac.cn.
authors.forename: Haitang
authors.initials: H
authors.lastname: Shi
authors.forename: Longfei
authors.initials: L
authors.lastname: Tan
authors.forename: Qijun
authors.initials: Q
authors.lastname: Du
authors.forename: Xue
authors.initials: X
authors.lastname: Chen
authors.forename: Linlin
authors.initials: L
authors.lastname: Li
authors.forename: Tianlong
authors.initials: T
authors.lastname: Liu
authors.forename: Changhui
authors.initials: C
authors.lastname: Fu
authors.forename: Huiyu
authors.initials: H
authors.lastname: Liu
authors.forename: Xianwei
authors.initials: X
authors.lastname: Meng
mesh_terms: D000327:Adsorption; D004396:Coloring Agents / Q000032:analysis* / Q000378:metabolism; D005290:Ferric Compounds / Q000138:chemical synthesis* / Q000378:metabolism; D055772:Green Chemistry Technology / Q000379:methods*; D053768:Metal Nanoparticles / Q000737:chemistry*; D017433:Protein Structure, Secondary; D014510:Urease / Q000737:chemistry* / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism; D014961:X-Ray Diffraction
chemical_list: D004396:Coloring Agents; D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; C000499:ferric oxide; D014510:Urease