Fabrication of Shape‐Controlled Palladium Nanoparticle‐Decorated Electrospun Polypyrrole/Polyacrylonitrile Nanofibers for Hydrogen Peroxide Coalescing Detection

Abstract

Shape‐controlled palladium nanoparticle‐decorated electrospun polypyrrole/polyacrylonitrile nanofibers (Pd_PPy/PAN NFs) are fabricated by electrospinning, vapor deposition polymerization (VDP), and electrodeposition. The electrospun PAN NFs are used as the framework for a composite nanomaterial. To make the material electrically conductive, the framework is coated with PPy by VDP. As‐prepared PPy/PAN NFs are used as the working electrode during electrodeposition of Pd. During Pd introduction, the presence of sulfuric acid in the electrolyte influences the shape of the Pd nanoparticles. Sulfate ions prevent the growth of the Pd, resulting in nanoparticles with sharp features. The fabricated Pd_PPy/PAN NFs are then incorporated as the active element in an electrochemical hydrogen peroxide (H2O2) biosensor. Tailoring the morphology of the Pd nanoparticles enables a minimum detectable limit of 1 × 10−9m H2O2, which is sufficiently low for monitoring diseases related to H2O2 concentration, such as Parkinson's disease and Alzheimer's disease. The low detection limit is achieved by coalescing detection of Pd and PPy.

Palladium Nanoparticles Anchored on Amine-Functionalized Silica Nanotubes as a Highly Effective Catalyst

“…3 nm were well dispersed on the surface of ASNTs. The interplanar spacing between lattice fringes is 0.195 nm that corresponds to (200) planes of Pd (the inset in Figure d) . In addition, the specific surface area (SSA) and pore-size distribution of ASNTs@Pd catalyst were estimated by measuring the N 2 adsorption–desorption isotherm.…”

“…The interplanar spacing between lattice fringes is 0.195 nm that corresponds to (200) planes of Pd (the inset in Figure 2d). 25 In addition, the specific surface area (SSA) and pore-size distribution of ASNTs@Pd catalyst were estimated by measuring the N 2 adsorption−desorption isotherm. Based on the Brunauer−Emmett−Teller (BET) method, the SSA of the ASNTs@Pd catalyst was found to be 375.5 m 2 /g.…”

1D Colloidal chains: recent progress from formation to emergent properties and applications

“…This electrical conductivity is especially useful to improve detection limits when a redox reaction is involved in sensing. 686,694 When these conductive 1D colloidal chains further physically interlock with each other to form a network, such relatively conductive network will become more resistant to deformation during stretching owing to partial contact loss between adjacent chains. This is the theoretical basis for applying colloidal chains as strain sensors.…”

Enhanced Hemocompatibility of Lysine Grafted Polyacrylonitrile Electrospun Nanofiber Membranes as a Potential Bilirubin Adsorption in Hemoperfusion

“…The relevant literature show that the surface modification of PAN nanofiber membranes has been used widely to improve their properties [13,14] , which will expand the application fields and have great potential to be used in hemoperfusion. In group of Jiang [15] , shape-controlled palladium nanoparticle-decorated electrospun polypyrrole/polyacrylonitrile nanofibers (Pd_PPy/PAN NFs) were fabricated by vapor deposition polymerization and electrodeposition. The results revealed that Pd_PPy/PAN NFs could be used as monitoring diseases related to H2O2 concentration, such as Parkinson's disease or Alzheimer's disease.…”