title: Formation of nickel-doped magnetite hollow nanospheres with high specific surface area and superior removal capability for organic molecules.
abstract: A strategy for the formation of magnetic NixFe3-xO4hollow nanospheres with very high specific surface areas was designed through a facile solvothermal method in mixed solvents of ethylene glycol and water in this work. The Ni/Fe ratios and the crystal phases of the NixFe3-xO4hollow nanocrystals can be readily tuned by changing the molar ratios of Ni to Fe in the precursors. An inside-out Ostwald ripening mechanism was proposed for the formation of uniform NixFe3-xO4hollow nanospheres. Moreover, the obtained NixFe3-xO4hollow nanospheres exhibited excellent adsorption capacity towards organic molecules such as Congo red in water. The maximum adsorption capacities of NixFe3-xO4hollow nanospheres for Congo red increase dramatically from 263 to 500 mg g-1with the increase of the Ni contents (x) in NixFe3-xO4hollow nanospheres from 0.2 to 0.85. The synthesized NixFe3-xO4nanoparticles can be potentially applied for waste water treatment.
authors: Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry, Peking University, Beijing, 100871, People's Republic of China. Chongqing Key Laboratory of Multi-Scale Manufacturing Technology, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, People's Republic of China.
authors: Zhenhu
authors: Z
authors: Li
authors: Yurong
authors: Y
authors: Ma
authors: Limin
authors: L
authors: Qi