Abstract
In this paper, core-shell SiO2/polypyrrole (SiO2/PPy) composites were prepared via in situ chemical oxidation of pyrrole monomer on surface of the modified SiO2 by using FeCl3 as the oxidant. Au nanoparticles (NPs) were loaded on SiO2/PPy composites by means of the redox reaction between PPy and gold ions. Several analytical tools, such as TEM, FT-IR, XRD and EDX, were employed to characterize the morphology and structure of the as-prepared SiO2/PPy/Au composites. Their catalytic performances in reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with NaBH4 as the reducing agent were studied. Results showed that the conversion of 4-NP was increased with an decrease of Au loading. The reduction of trace AuCl4− ions in core-shell composites to small Au NPs by NaBH4 in the beginning of the reaction favored the enhancement of catalytic activity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.