期刊
NANO RESEARCH
卷 14, 期 9, 页码 3260-3266出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-021-3403-2
关键词
mesoporous materials; multi-shelled structure; hollow; metal oxide nanospheres; aerobic catalytic oxidation
类别
资金
- National Natural Science Foundation of China [21671073, 21621001]
- 111 Project of the Ministry of Education of China [B17020]
- Program for JLU Science and Technology Innovative Research Team
The study introduces a method for synthesizing multi-shelled mesoporous hollow metal hydroxides and oxides nanospheres, which possess stable hollow structures and high specific surface areas. The Au nanoparticles loaded composited nanospheres exhibit excellent activity and selectivity in the oxidation of ethylbenzene.
Nowadays, multi-shelled mesoporous hollow metal oxide nanospheres have drawn a lot of attention due to their large internal space, nanometer scaled shell thickness, high specific surface area and well-defined mesopores, of which unique nanostructure endows metallic oxides with enhanced properties. In this thesis, we have studied and proposed a versatile ligand-assisted cooperative template method to synthesize multi-shelled mesoporous hollow metal hydroxides and oxides nanospheres, in which silica nanospheres act as sacrificial templates and the coordination interaction between metal ions and surfactant can be cooperatively amplified by using chelating ligand (ascorbic acid) as a co-template. The synthesized metal hydroxides and oxides nanospheres possess stable hollow structure, uniform spherical morphology and tunable diameter from 270 to 690 nm. All the multi-shelled mesoporous hollow metal hydroxide and metal oxide nanospheres exhibit high surface areas (up to 640 m(2)/g). The obtained Au nanoparticles loaded composited nanospheres exhibit excellent reactivity for solvent-free aerobic oxidation of ethylbenzene with high activity (28.2%) and selectivity (87%).
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