The production of an efficient visible light photocatalyst for CO oxidation through the surface plasmonic effect of Ag nanoparticles on SiO 2 @α-Fe 2 O 3 nanocomposites.
Kasimayan UmaShih-Wen ChenNadarajan ArjunGuan-Ting PanThomas C-K YangPublished in: RSC advances (2018)
A process for the photo deposition of noble Ag nanoparticles on a core-shell structure of SiO 2 @α-Fe 2 O 3 nanocomposite spheres was performed to produce a CO photo oxidation catalyst. The structural analyses were carried out for samples produced using different Ag metal nanoparticle weight percentages on SiO 2 @α-Fe 2 O 3 nanocomposite spheres by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), UV-vis spectroscopy, Raman spectroscopy and Fourier transform infrared spectroscopy (FTIR). A computational study was also performed to confirm the existence of the synergic effect of surface plasmon resonance (SPR) for different weight percentages of Ag on the SiO 2 @α-Fe 2 O 3 nanocomposites. The mechanism for CO oxidation on the catalyst was explored using diffuse reflectance infrared Fourier transform spectroscopy (DRFIT). The CO oxidation results for the Ag (2 wt%)-SiO 2 @α-Fe 2 O 3 nanocomposite spheres showed 48% higher photocatalytic activity than α-Fe 2 O 3 and SiO 2 @α-Fe 2 O 3 at stable temperature.
Keyphrases
- visible light
- electron microscopy
- high resolution
- magnetic nanoparticles
- raman spectroscopy
- body mass index
- physical activity
- single molecule
- magnetic resonance imaging
- weight gain
- gold nanoparticles
- computed tomography
- nitric oxide
- high grade
- metal organic framework
- walled carbon nanotubes
- crystal structure
- transition metal