The strong adsorbability of Ag(I) and Hg(II) ions onto fine poly(o-phenylenediamine) (PoPD) microparticles synthesized through a chemically oxidative polymerization o-phenylenediamine was systematically examined PoPD/Ag nanocomposites were facilely prepared the reactive sorption method. effect (NH4)2S2O8 oxidant/o-phenylenediamine monomer ratio on yield, macromolecular structure, conductivity, insolubility PoPD studied. significantly optimized by varying oxidant/monomer ratio, doping state,...

An initiator is applied to synthesize single-walled carbon nanotube/polyaniline composite nanofibers for use as high-performance chemosensors. The possess widely tunable conductivities (10−4 102 S/cm) with up 5.0 wt % nanotube (SWCNT) loadings. Chemosensors fabricated from the synthesized a 1.0 SWCNT loading respond much more rapidly low concentrations (100 ppb) of HCl and NH3 vapors compared polyaniline alone (120 s vs 1000 s). These nanofibrillar SWCNT/polyaniline nanostructures are...

Fine microparticles of poly(p-phenylenediamine) (PpPD) and poly(m-phenylenediamine) (PmPD) were directly synthesized by a facile oxidative precipitation polymerization their strong ability to adsorb lead ions from aqueous solution was examined. It found that the degree adsorption depends on pH, concentration, temperature ion solution, as well contact time microparticle dose. The data fit Langmuir isotherm process obeyed pseudo-second-order kinetics. According equation, maximum capacities...

Novel copolymer nanoparticles were easily synthesized with a polymerization yield of 59.3 % by an oxidative precipitation aniline (AN) and m-sulfophenylenediamine (SP) in HCl without any external stabilizer. The yield, size, morphology, electroconductivity, solubility, solvatochromism, lead mercury ion adsorbability the HCl-doped salt particles studied changing AN/SP ratio. (80:20) are found to have minimal number-average diameter(84.4 nm), size polydispersity index (1.149), high stability,...

A newly designed Pb(II) potentiometric sensor based on intrinsically conducting nanoparticles of solid poly(aniline-co-2-hydroxy-5-sulfonic aniline) possessing many ligating functional groups like −NH–, −N=, −OH, −SO3H, −NH2 as ionophores in plasticizer-free vinyl resin membranes has been fabricated. linear Nernstian response is obtained within a wide activity range from 1.0 × 10–3 to 10–10 M with detection limit low 2.2 10–11 M. The pH independent plateau ranges between 3.5 and 7.0. After...

Pure polypyrrole (PPy) nanoparticles that are well-applicable for nanocomposite and nanocarbon precursor were productively synthesized by necessarily unstirred oxidative polymerization of pyrrole in acidic aqueous media at 0 °C without any template. The species concentration acid oxidant have been carefully investigated to optimize the yield, conjugated structure, size, conductivity PPy particles. Laser particle-size analysis, field-emission scanning electron microscopy, transmission atomic...

Strong heavy-metal-ion sorbents based on copolymer microparticles with many functional groups including amino, imino and sulfonic were synthesized by a chemical oxidative polymerization of m-phenylenediamine (mPD) p-sulfonic-m-phenylenediamine (SPD) in pure water. The sorbent performance has been investigated regard to mPD/SPD ratio, group densities, metal ion species, sorption conditions. It is found that (95/5) demonstrate the maximal yield, electrical conductivity, Pb(II) Cr(VI) (mainly...

The poor cycling stability of faradaic materials owing to volume expansion and stress concentration during processes limits their use in large-scale electrochemical deionization (ECDI) applications. Herein, we developed a "soft-hard" interface by introducing conducting polymer hydrogels (CPHs), that is, polyvinyl alcohol/polypyrrole (PVA/PPy), support the uniform distribution Prussian blue analogues (e.g., copper hexacyanoferrate (CuHCF)). In this design, soft buffer layer hydrogel...

Cellulose, cellulose diacetate (CDA), triacetate (CTA), nitrate (CN), and phosphate (CP) were subjected to dynamic thermogravimetry in nitrogen air. The thermostability of the its esters was estimated, taking into account values initial thermal degradation temperature Td, at maximum rate Tdm, char yield 400°C. results show that these polymers may be arranged following order increasing thermostability: CN < CP regenerated filter cotton CDA CTA. activation energy (E), (n), frequency factor (Z)...

A series of novel copolymer microparticles from 4-sulfonic diphenylamine (SDP) and 1,8-diaminonaphthalene (DAN) was facilely prepared by a chemically oxidative polymerization. The structures properties the were systematically characterized several important techniques. exhibit good water resistance high thermostability. Their electrical conductivity significantly rises after HCl doping or Ag adsorption. Ag+ reactive adsorbability optimized carefully regulating SDP/DAN ratio, particle size,...

Abstract The highest Hg‐ion adsorbance so far , namely up to 2063 mg g −1 has been achieved by poly(aniline‐ co ‐5‐sulfo‐2‐anisidine) nanosorbents. Sorption of Hg ions occurs mainly redox and chelation mechanisms (see scheme), but also ion exchange physisorption. magnified image Poly(aniline (AN)‐ ‐5‐sulfo‐2‐anisidine (SA)) nanoparticles were synthesized chemical oxidative copolymerization AN SA monomers, their extremely strong adsorption mercury in aqueous solution was demonstrated....

The straight dope: Polythiophene (PTh) nanoparticles with a narrow size distribution were successfully synthesized by chemical oxidative polymerization (see image). highest conductivity of virgin PTh is 3.1x10(-4) S cm(-1) and can be dramatically enhanced to 50 doping in iodine vapor.Polythiophene simple the presence very small amount cetyltrimethylammonium bromide (CTAB). yield, particle size, bulk electrical conductivity, solubility have been optimized adjusting CTAB/FeCl(3)...

Novel electrochromic copolymers from o-phenylenediamine (oPD) with aniline (ANi) were facilely synthesized by a chemical oxidative polymerization. The synthesis, structure, and properties of the systematically studied changing oPD content polymerization temperature. dependence yield at 70 °C on is quite different that 17 °C, indicating copolymerization between ANi comonomers varies significantly temperature, whereas conductivity solubility obtained demonstrate similar dependency content....

Fine polythiophene (PTh) microparticles were successfully synthesized by a novel interfacial polymerization at dynamic interface between two immiscible solvents, i.e., n-hexane and acetonitrile or nitromethane containing thiophene oxidant, respectively. The yield, size, electrical conductivity of the are optimized facilely regulating medium species, oxidant oxidant/monomer ratio, monomer concentration, temperature. thoroughly characterized IR, UV−vis spectroscopy, wide-angle X-ray...

Abstract Novel copolymer nanoparticles with inherent self‐stability, narrow size distribution, and high electrical conductivity are facilely productively synthesized by the oxidative precipitation polymerization of 5‐sulfonic‐2‐anisidine aniline in acidic medium without any external stabilizer. The structures particles systematically characterized IR UV/Vis spectroscopy, X‐ray diffraction, laser particle‐size analysis, atomic force microscopy, field‐emission scanning electron high‐resolution...

Electron-rich oligofluoranthene has been successfully synthesized by a one-step direct chemical oxidative oligomerization of fluoranthene. Key advantages include easy synthesis, high synthetic yield and low cost when compared with electropolymerization. Oligofluoranthene in solution is very strong cyan fluorescence emitter 12.2 times higher intensity than the fluoranthene monomer. The can be effectively quenched specific electron-deficient species, enabling fabrication low-cost,...

Chemical oxidative polymerization at 15 degrees C was used for the simple and productive synthesis of polyaniline (PAN) nanosticks. The effect media on yield, size, stability, electrical conductivity PAN nanosticks studied by changing concentration nature acid medium oxidant introducing organic solvent. Molecular supramolecular structure, size distribution were characterized UV/Vis IR spectroscopy, X-ray diffraction, laser particle-size analysis, transmission electron microscopy....

A potentiometric sensor to detect lead ions using newly synthesized conducting copolymer microparticles as an ionophore in self-supporting poly(vinyl chloride) membrane matrix plasticized with dioctyl phthalate was developed. The containing many ligating functional groups including amino, imino and sulfonic were by a chemical oxidative copolymerization of m-phenylenediamine (mPD) p-sulfonic-m-phenylenediamine (SPD) pure water. Due the presence –NH–, –N, –NH2, –SO3H on microparticles, linear...

Water-dispersible polypyrrole nanospheres with diameters of less than 100 nm were synthesized in high yield without any templates, surfactants, or functional dopants by the introduction 2,4-diaminodiphenylamine as an initiator into a reaction mixture pyrrole monomer, oxidant, and acid. The plays critical role tailoring nanostructures polypyrrole. 2,4-Diaminodiphenylamine interacts acid to form cations, which combine various anions self-assemble resulting different size nanomicelles. These...