Synthesis And Catalytic Properties Of Ag/PANI/Fe₂O₃ Composite Nanoparticles

Polyaniline (PANI) is considered one of the most multifunctional polymers, due to its low price, good conductivity, environmental stability and unique oxidation-reduction quality. Iron oxide is widely used in various fields for its broad chromatogram, non-toxic and low cost. Silver composites nanopaticales is an important functional material and has broad application prospect in optics, electronics, magnetism and catalysis. Silver nanoparticles loaded on polyaniline—iron oxide composite carrier has not been reported to our knowledge, which would play an impotant role for its special composition.The Ag/PANI/Fe2O3 nanoparticles were synthesized by three kinds of methods. Solvent thermal process was used to synthesize Ag/PANI/Fe2O3 composite particles in one-step. The effects of condions on the structure of composite particles were studied and optimum paremerers were determined. Additionally, two-steps and three-steps were also used to obtain the Ag/PANI/Fe2O3 paticles. The carrier composed of PANI and Fe2O3 was synthesized, firstly, then the zero-valent Ag was loaded onto the PANI/Fe2O3 carrier through the redox of silver nitrate and polyaniline. TEM, XRD, EDS and FT-IR were used to characterize these Ag/PANI/Fe2O3 nanoparticles.The catalytic reduction of sodium 3-nitrobenzene sulfonate was used as proke to implore the catalytic property of Ag/PANI/Fe2O3 composite nanoparticals. The Ag/PANI/Fe2O3 composite nanoparticals synthesized with Ag nanoparticals in 10 nm loadwd on SDS doped PANI andα-Fe2O3 carrier present highest catalytic performance.The 78.58% of Sodium 3-nitrobenzene sulfonate was reduced in 30 minites.