title: Multishelled Metal Oxide Hollow Spheres: Easy Synthesis and Formation Mechanism.
abstract: Uniform multishelled NiO, Co3 O4 , ZnO, and Au@NiO hollow spheres were synthesized (NiO and Co3 O4 hollow spheres for the first time) by a simple shell-by-shell self-assembly allowing for tuning of the the size, thickness and shell numbers by controlling the heat treatment, glucose/metal salt molar ratio, and hydrothermal reaction time. These findings further the development of synthetic methodologies for multishelled hollow structures and could open up new opportunities for deeper understanding of the mechanisms of shell-by-shell self-assembly. Moreover, the double-shelled NiO hollow sphere exhibits a higher photocatalytic activity for degradation of methyl orange than its morphological counterparts.
authors.affiliation: Functional Soft Matter & Materials Group, Key Laboratory of Space Applied Physics and Chemistry of Ministry of Education, School of Science, Northwestern Polytechnical University, Xi'an, 710129, P.R. China. wuhongjing@mail.nwpu.edu.cn, wuhongjing@nwpu.edu.cn.
authors.forename: Hongjing
authors.initials: H
authors.lastname: Wu
authors.affiliation: Center of Nanomaterials for Renewable Energy (CNRE), State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an, 710049, P.R. China.|Institute of Energy and Environmental Materials, Growing Base for State Key Laboratory, College of Materials Science and Engineering, Qingdao University, Qingdao, 266071, P.R. China.
authors.forename: Guanglei
authors.initials: G
authors.lastname: Wu
authors.affiliation: Functional Soft Matter & Materials Group, Key Laboratory of Space Applied Physics and Chemistry of Ministry of Education, School of Science, Northwestern Polytechnical University, Xi'an, 710129, P.R. China.
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Ren
authors.affiliation: School of Physics, Northwest University, Xi'an, 710069, P.R. China.
authors.forename: Xinghua
authors.initials: X
authors.lastname: Li
authors.affiliation: Functional Soft Matter & Materials Group, Key Laboratory of Space Applied Physics and Chemistry of Ministry of Education, School of Science, Northwestern Polytechnical University, Xi'an, 710129, P.R. China.
authors.forename: Liuding
authors.initials: L
authors.lastname: Wang
mesh_terms: D001391:Azo Compounds / Q000737:chemistry; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry*; D017348:Microscopy, Electron, Scanning Transmission; D009532:Nickel / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010782:Photolysis / Q000528:radiation effects; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D010087:Oxides; D003035:Cobalt; C100258:methyl orange; D009532:Nickel; C028007:nickel monoxide; D015034:Zinc Oxide; C060728:cobalt oxide
keywords: hollow structures; hydrothermal synthesis; metal oxides; photocatalysis; self-assembly