Aerosol method assisted fabrication Ag@SiO2 and efficient catalytic activity for reduction of 4-nitrophenol

作者：Wang, Haifeng; Quan, Lin; Hu, Bo; Wei, Guohui; Jiang, Xingmao^*

来源：Micro & Nano Letters, 2017, 12(9): 684-688.

DOI：10.1049/mnl.2017.0010

• catalysis
• reduction (chemical)
• organic compounds
• nanofabrication
• core-shell nanostructures
• silver
• silicon compounds
• nanoparticles
• particle size
• calcination
• nanocomposites
• ultraviolet spectra
• visible spectra
• aerosol method assisted fabrication
• catalytic activity
• 4-nitrophenol reduction
• Ag-decorated silica nanoparticles
• core-shell Ag@SiO2 mesosphere
• nanoparticle size
• calcination temperature
• silica surface
• catalytic activities
• UV-vis absorption spectroscopy
• Ag-SiO2

The Ag-decorated silica nanoparticles (termed core-shell Ag@SiO2 mesosphere) have been successfully fabricated by an aerosol method in this Letter. The size of Ag nanoparticles (AgNPs) can be well controlled by tuning the calcination temperature and the AgNPs on the surface of silica can be gradually grown with the increase of the calcination temperature. Moreover, the catalytic activity of nanocomposites for a reduction of 4-nitrophenol (4-NP) was studied in this Letter. The as-prepared nanocomposites with well dispersed AgNPs possessed distinguished catalytic activities in catalysing for the reduction of 4-NP by NaBH4 in the aqueous phase, which was detected by UV-vis absorption spectroscopy. The results showed that the nanocomposites presented a distinguished catalytic activity compared to the pure spherical AgNPs.

• 出版日期2017-9
• 单位武汉工程大学; 常州大学