Multidimensional Polypyrrole/Iron Oxyhydroxide Hybrid Nanoparticles for Chemical Nerve Gas Agent Sensing Application

Abstract

Multidimensional FeOOH nanoneedle-decorated hybrid polypyrrole nanoparticles (PFFs) were fabricated using dual-nozzle electrospray and heat stirring process. To decorate metal oxide nanoneedles on the polypyrrole (PPy) surface, metal oxide particle-decorated PPys (E_PPy) were fabricated as starting materials. The E_PPy particles were prepared by dual-nozzle electrospray because ferric ions (Fe(3+)) dispersed on the surface reacted with hydroxide (OH(-)) ions in the collector solution without aggregation of each particles. Multidimensional hybrid PFFs with maximized surface area were then formed by heat stirring reaction in the aqueous metal precursor contained solutions. The decoration morphology of the metal oxide nanoneedles could be controlled by precursor concentration in the aqueous solution. These multidimensional hybrid PPFs were applied to nerve gas agent (DMMP) chemical sensor at room temperature with excellent sensitivity. The minimum detectable level (MDL) of PFFs was as low as 0.1 ppb, which is higher than that for a chemical sensor based on hybrid materials. This is because the metal oxide nanoneedles increase surface area and affinity to DMMP vapor.

Electrohydrodynamic atomization: A two-decade effort to produce and process micro-/nanoparticulate materials

“…Gaury et al (2013) prepared Nb-doped WO 3 thin films by electrospraying a tungsten isopropoxide in 2-propanol precursor solution on glass substrates for potential use in gas sensors. In a different study, Lee et al (2013) fabricated polypyrrole/iron oxyhydroxide hybrid nanoparticles using co-axial electrospray and heat stirring process for nerve gas sensing applications. Their most recent study demonstrated the production of urchin-like polypyrrole nanoparticles with various diameters using co-axial electrospray and vapor deposition polymerization (Lee et al, 2014).…”

Highly sensitive gas sensor based on Al-doped ZnO nanoparticles for detection of dimethyl methylphosphonate as a chemical warfare agent simulant

“…Recently, some groups have developed gas sensors based on various metal-oxides for onsite monitoring of DMMP vapor [1][2][3][4][5][6][7]. These metal-oxide-based sensors offer advantages such as low cost, fast response time, ease in manufacturing, small size, high efficiency, low power consumption, and portability.…”

Coaxial CoMoO4 nanowire arrays with chemically integrated conductive coating for high-performance flexible all-solid-state asymmetric supercapacitors

“…The crystal structure of the CoMoO 4 NWs, PPy and CoMoO 4 /PPy hybrid nanocomposite have been evidently revealed by XRD analytical patterns in Figure 4a. 39 In the red part, one significant diffraction peak at around 26° was observed, resulting from the CoMoO 4 core and PPy shell.aa The coreshell structure CoMoO 4 /PPy hybrid nanocomposite is observed to display all the characteristic peaks corresponding to CoMoO 4 and PPy separately, confirming free of impurities phases in the nanocomposites. 21-0868), demonstrating the lattice parameters observed are well matching the PDF card.…”