Synthesis and characterization of SiO₂/polyaniline/Ag core–shell particles and studies of their electrical and hemolytic properties: multifunctional core–shell particles

Abstract

Three layers of conducting core–shell nanocomposite particles composed of SiO2/polyaniline (PAni)/Ag were prepared in the presence of silicon dioxide (SiO2) in an aqueous solution containing sodium dodecyl benzenesulfonate (SDBS) as a surfactant.

Experimental Insights into Mesoporous Polyaniline-Based Nanocomposites for Anionic and Cationic Dye Removal

“…In Figure , where a temperature-dependent weight loss of the sample was recorded in three major steps in the temperature range of 30–900 °C. Similar thermal findings have been reported for polyaniline-based nanocomposites in previously published studies. ,, The first stage of weight loss starts from 30 to 110 °C and is about 5.5%, which is likely due to the loss of moisture from the polymer matrix, decomposition of impurities, and unreacted aniline monomers . Beyond 110 °C and up to 250 °C, the Pani composite seems to be stable .…”

“…Figure S2a,b shows the FT-IR spectra of bare ASG and bare Pani. The FTIR spectra of ASG (Figure S2a) represent characteristics peaks at 806 cm –1 (Si–O–Si symmetric stretching), 1056 cm –1 (Si–O–Si symmetric stretching), and 1633 cm –1 (O–H bending vibrations). − From the FTIR spectrum of the Pani in Figure S2b, characteristic IR bands appear at around 793 (C–H stretching), 1109 (CN stretching vibrations), 1480,1563 (C–C stretching of benzenoid and quinoid rings), and 1285 cm –1 (C–N stretching of an aromatic amine).…”

“…Similar thermal findings have been reported for polyaniline-based nanocomposites in previously published studies. ,, The first stage of weight loss starts from 30 to 110 °C and is about 5.5%, which is likely due to the loss of moisture from the polymer matrix, decomposition of impurities, and unreacted aniline monomers . Beyond 110 °C and up to 250 °C, the Pani composite seems to be stable . It can be attributed to strong interaction between Pani and ASG, which constrains the thermal motion of short-chain moieties of Pani within the composite, enhancing the thermal stability of Pani@ASG nanocomposites .…”

“…61 Beyond 110 °C and up to 250 °C, the Pani composite seems to be stable. 61 It can be attributed to strong interaction between Pani and ASG, which constrains the thermal motion of short-chain moieties of Pani within the composite, enhancing the thermal stability of Pani@ ASG nanocomposites. 78 The second stage of weight loss which begins from 251 to 520 °C is about 5.36%, which can be attributed to the degradation of short chains of the Pani matrix and the loss of HCl dopant anion, respectively.…”

Unique properties of silver and copper silica-based nanocomposites as antimicrobial agents

“…1,48,49 The band at 952 cm À1 is ascribed to the Si-OH bond, 1,49,50 while the rest of the them stems from structural deformation within silica network and from non-stoichiometric silicon oxide. 51 The pure Ag sample showed characteristic bands in the 1100-1800 cm À1 range (Fig. 6B) arouse from silver nanoparticles as well as bands of the hydroxyl groups in form of the shell layer around the them in the 3200-3800 cm À1 range.…”