Silver nanoparticles deposited on polysiloxane networks as active catalysts in dye degradation

摘要

The article proposes a new method of obtaining silver nanoparticles on polysiloxane networks using the reducing properties of Si-H groups. Three types of networks with different architecture and distribution of Si-H groups were studied as reducing agents for silver ions and as matrices for the obtained silver nanoparticles. As established by FTIR spectroscopic studies, the redox reaction between Ag+ ions from the silver heptafluorobutyrate solution in toluene and Si-H groups of the networks occurred, which resulted in the appearance of silver nanoparticles in the systems. The amount of metal introduced into individual polysiloxane networks is closely related to the consumption of Si-H groups in them. The type of polysiloxane networks used affects the size of Ag NPs obtained and their distribution on the carrier. Polysiloxane-Ag systems are observed to be an effective catalyst on reduction of hazardous dye like methyl red, which is confirmed by a decrease in absorbance maximum values.