Multishelled Metal Oxide Hollow Spheres: Easy Synthesis and Formation Mechanism

• Published in: Chemistry : a European journal 2016-06, Vol.22 (26), p.8864-8871
• Main Authors: Wu, Hongjing, Wu, Guanglei, Ren, Yanyan, Li, Xinghua, Wang, Liuding
• Format: Article
• Language: English
• Subjects: Catalytic activity; Chemistry; Cobalt oxides; Degradation; Dyes; Glucose; Heat treatment; hollow structures; hydrothermal synthesis; Metal oxides; Metals; Photocatalysis; Reaction time; Salts; Self assembly; Spheres; Synthesis; Tuning; Zinc oxide
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.201504358

Uniform multishelled NiO, Co3O4, ZnO, and Au@NiO hollow spheres were synthesized (NiO and Co3O4 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. There go the spheres: Uniform multishelled NiO, Co3O4, ZnO, and Au@NiO hollow spheres were synthesized by a simple shell‐by‐shell self‐assembly allowing for tuning of the size, thickness and shell numbers, opening up new opportunities for deeper understanding of the mechanisms of shell‐by‐shell self‐assembly.