Structural, optical, dielectric, and surface properties of polyimide hybrid nanocomposites films embedded mesoporous silica nanoparticles synthesized from rice husk ash for optoelectronic applications

Abstract

In this study, mesoporous silica nanoparticles previously prepared from the rice husk ash were utilized as nanofillers to fabricate thin films of polyimide/silica hybrid nanocomposites with different ratios (0, 6, 8, 10, and 12%). Subsequently, all hybrid films were further subjected to comprehensive characterization using XRD, SEM, AFM, and contact angle analyzers. The films exhibited a variety of optoelectronic properties depending on the silica nanoparticles' content. Where the silica nanofillers affected the optical clarity of polyimide films and increasing the silica ratio resulted in decreasing in films transmittance which led to reducing the transparency and enhanced the absorption coefficient of films in the UV range. Besides, the dielectric constant value and free charge carrier concentrations have increased which promoted the optical conductivity of the films. Moreover, increasing silica content resulted in converting the films from hydrophobic to hydrophilic surfaces, and has improved their wettability at all pH values. Graphical abstract

Poly(O‐Toluidine)‐polyvinylpyrrolidone copolymer submerged MgFe2O4/CS‐OXSWCNTs nanocomposite for removal of acid red dye from aqueous solutions

“…Subsequently, certain conductive polymer types exhibit potential for dye removal. [26][27][28][29][30] One such polymer is Poly(O-Toluidine) (POT), which stands out for its stability, low cost, and high efficiency in carrying electrical charges. By adding acids like HCl or H 2 SO 4 , the POT can be easily modified and made more effective in attracting dye molecules and nanoparticles.…”

“…When polymers are treated with dye effluent, the resulting polymeric nanocomposite exhibits improved conductivity and uniform dispersion due to the integration of nanoparticles. Subsequently, certain conductive polymer types exhibit potential for dye removal 26–30 . One such polymer is Poly(O‐Toluidine) (POT), which stands out for its stability, low cost, and high efficiency in carrying electrical charges.…”

Design of a Novel Nanosensors Based on Green Synthesized CoFe2O4/Ca-Alginate Nanocomposite-Coated QCM for Rapid Detection of Pb(II) Ions

“…Due to their distinctive architectures and superior optical, electrical, and catalytic characteristics, nanomaterials have received extensive research in optical, electronic, and electrochemical sensors for the detection of water contaminants. The nanomaterial-based sensors have considerable potential for detecting water contaminants and surpass traditional sensors and technologies in different aspects, such as high sensitivity, quick response, and ease of use [ 23 , 24 , 25 ]. Regarding their superior characteristics to those displayed by the traditional materials with grains size > 10 µm, magnetic spinel ferrite nanoparticles have garnered enormous attention over the past two decades.…”

QCM-Based MgFe2O4@CaAlg Nanocomposite as a Fast Response Nanosensor for Real-Time Detection of Methylene Blue Dye

“…Magnetic nanoparticles used in environmental applications typically have an inorganic nanoparticle at their core and a biocompatible substance coated on their surface to stabilize them under physiochemical circumstances [ 17 , 18 , 19 ]. Some nanoparticle systems used in different applications become dependent on these coatings [ 20 ]. They simultaneously serve as a steric barrier and, a setting in which the characteristics of the nanoparticles may be modified, preventing the uptake of nanoparticles by macrophages, and reducing the inclination to aggregate [ 21 , 22 ].…”