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

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.

Inspec keywords: nanocomposites; calcination; catalysis; visible spectra; organic compounds; particle size; ultraviolet spectra; silver; nanoparticles; reduction (chemical); core-shell nanostructures; nanofabrication; silicon compounds

Other keywords: Ag-decorated silica nanoparticles; catalytic activities; aerosol method assisted fabrication; nanocomposites; 4-nitrophenol reduction; nanoparticle size; silica surface; UV–vis absorption spectroscopy; core–shell Ag@SiO2 mesosphere; calcination temperature; catalytic activity; Ag-SiO2

Subjects: Other methods of nanofabrication; Optical properties of thin films, low-dimensional and nanoscale structures; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Heterogeneous catalysis at surfaces and other surface reactions; Low-dimensional structures: growth, structure and nonelectronic properties; Other heat and thermomechanical treatments; Visible and ultraviolet spectra (condensed matter); Specific chemical reactions; reaction mechanisms; Powder techniques, compaction and sintering

References

    1. 1)
    2. 2)
    3. 3)
    4. 4)
    5. 5)
    6. 6)
    7. 7)
    8. 8)
    9. 9)
    10. 10)
    11. 11)
    12. 12)
    13. 13)
    14. 14)
    15. 15)
    16. 16)
    17. 17)
    18. 18)
      • 13. Imashuku, S., Tanaka, T., Kuramitsu, A., et al: ‘Effect of impurity silica on grain boundary resistance of yttrium-doped barium zirconate: high temperature materials and processes’, High Temp. Mater. Process., 2011, 29, (5-6), pp. 339346.
    19. 19)
    20. 20)
    21. 21)
    22. 22)
    23. 23)
    24. 24)
    25. 25)
    26. 26)
    27. 27)
    28. 28)
    29. 29)
    30. 30)
    31. 31)
    32. 32)
    33. 33)
http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2017.0010
Loading

Related content

content/journals/10.1049/mnl.2017.0010
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading