Enhanced Stability of Photoelectrodes with Electrogenerated Polyaniline Films

Noufi, R.; Nozik, Arthur J.; White, J. T.; Warren, Leslie F.

doi:10.1149/1.2123487

Cited by 284 publications

(85 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Intrinsically conductive polymers (ICP) have been intensively studied since 1976; these studies focused on their potential technological applications, including electro-chromic devices, [1][2][3][4] batteries, [5][6][7][8] sensors, catalysis, capacitors, antistatic coatings, and gas separation membranes. 9 -13 An electrochromic device is combined by optically transparent electrodes coated with complementary electrochromic materials and separated by an electrolyte, which may be either solid or liquid.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical behaviors of polyaniline–poly(styrene‐sulfonic acid) complexes and related films

Lin

Chou

Chen

et al. 2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

This research focuses on the syntheses of polyaniline with poly(styrenesulfonic acid) and their electrochemical behavior, including absorbance behavior and electrochemical response time of polyaniline-poly(styrenesulfonic acid) [PANI-PSSA]. The complexes PANI-PSSA were prepared by electrochemical polymerization of monomer (aniline) with PSSA, using indium-tin oxide (ITO) as working electrode in 1M HCl solution. Polyaniline (PANI), poly(o-phenetidine)-poly(styrenesulfonic acid) [POP-PSSA], and poly(2-ethylaniline)-poly(styrenesulfonic acid) [P2E-PSSA] also were prepared by electrochemical polymerization and to be the reference samples. The products were characterized by IR, VIS, EPR, water solubility, elemental analysis, conductivity, SEM, and TEM. IR spectral studies shows that the structure of PANI-PSSA complexes is similar to that of polyaniline. EPR and visible spectra indicate the formation of polarons. The morphology of the blend were investigated by SEM and TEM, which indicate the conducting component and electrically conductive property of the polymer complexes. Elemental analysis results show that PANI-PSSA has a nitrogen to sulfur ratio (N/S) of 38%, lower than that for POP-PSSA (52%) and P2E-PSSA (41%). Conductivity of the complexes are around 10 Ϫ2 S/cm, solubility of PANI-PSSA in water is 3.1 g/L. The UVVis. absorbance spectra of the hybrid organic/inorganic complementary electro-chromic device (ECD), comprising a polyaniline-poly(styrenesulfonic acid) [PANI-PSSA] complexes and tungsten oxide (WO 3 ) thin film coupled in combination with a polymer electrolyte poly(2-acrylamido-2-methyl-propane-sulfonic acid) [PAMPSA]. PANI-PSSA microstructure surface images have been studied by AFM. By applying a potential of ϳ3.0 V across the two external ITO contacts, we are able to modulate the light absorption also in the UV-Vis region (200 -900 nm) wavelength region. For example, the absorption changes from 1.20 to 0.6 at 720 nm. The complexes PANI-PSSA, POP-PSSA, and P2E-PSSA were prepared by electrochemical polymerization of monomer (aniline, o-phenetidine, or 2-ethylaniline) with poly(styrenesulfonic acid), using ITO as working electrode in 1M HCl solution, respectively. UV-Vis spectra measurements shows the evidences for the dopped polyaniline system to be a highly electrochemical response time, recorded at the temperature 298 K, and the results were further analyzed on the basis of the color-discolor model, which is a typical of protontation systems. Under the reaction time (3 s) and monomer (aniline, o-phenetidine, 2-ethylaniline) concentration (0.6M) with PSSA (0.15M), the best electrochemical color and discolor time of the PANI-PSSA is slower than POP-PSSA complexes (125/125 ms; thickness, 3.00 m) and P2E-PSSA complexes. Under the same thickness (10 m), the best electrochemical color and discolor time of the PANI-PSSA complexes is 1500/750 ms, that is much slower than P2E-PSSA complexes (750/500 ms) and POP-PSSA complexes (500/250 ms). In film growing rate, the PANI-PSSA complexes (0.54 m/s) are...

show abstract

Section: Introductionmentioning

confidence: 99%

Electrochemical behaviors of polyaniline–poly(styrene‐sulfonic acid) complexes and related films

Lin

Chou

Chen

et al. 2006

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…EC methods are clean and easy to handle and therefore, there is increasing interest in the development of practical EC methods for the treatment of high toxicity and biorefractory organic pollutants. Further, chemical and electrochemical oxidation of aniline, which produces a conductive polymer (polyaniline) has received considerable interest in recent years because of its applications in a variety of technological fields, such as electrochromic devices [15], chemical sensors [16], charge storage systems [17] protection against corrosion [18] etc.…”

Section: Introductionmentioning

confidence: 99%

Substituent and Solvent Effects on the Electrochemical Oxidation of para- and meta-Substituted Anilines

Bhuvaneshwari

Elango

2006

Zeitschrift Für Naturforschung B

View full text Add to dashboard Cite

Electrochemical oxidation of fifteen para-and meta-substituted anilines in different mole fractions of acetic acid in water has been investigated in the presence of 0.1 M sulphuric acid as supporting electrolyte. The oxidation potential data of anilines correlates well with Hammett's and BrownOkamoto's substituent constants affording negative reaction constants. The effect of para-and metasubstituents on the oxidation potential conforms to Swain's F and R parameters, affording negative reaction constants. The oxidation potential values correlate well with macroscopic solvent parameters such as relative permittivity, ε r , and polarity, E T N . Multiple correlation analysis also shows an excellent correlation with the oxidation potential values.

show abstract

“…2,3 Consequently, PAN and its derivatives have versatile applications including use as active electronic materials, 4,5 in secondary batteries, 6,7 and in microelectronic and electrochromic devices. [7][8][9][10] To improve the processibility and thermal and environmental stability and to induce novel electronic and electrochemical properties, substituted PANs are being developed.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of electrically conducting copolymer of aniline and o‐bromoaniline using methane sulfonic acid as dopant

Roy

Gupta

Bhowmik

et al. 2002

J of Applied Polymer Sci

View full text Add to dashboard Cite

Polyaniline (PAN), poly(o-bromoaniline) (POBA), and poly(aniline-co-o-bromoaniline) (PABA) were synthesized by oxidative coupling. These polymers are protonated by 10 -20% methane sulfonic acid (MSA) and 1M HCl. The new polymer bases have greater solubility than that of PAN in common polar organic solvents; PAN-MSA was observed to be the most thermally stable of these polymers. POBA is associated with residual quinoid diimine units as illustrated in the IR and UV-vis spectra, after reduction with hydrazine dihydrochloride. Both the doping agents cause a downward shift of the quinoid absorption in the IR spectra. MSA-and HCl-doped PAN and PABA polymers exhibit a coil-like conformation in DMSO, whereas only MSA-doped PAN and PABA show an "expanded coillike" conformation in m-cresol with a "free carrier tail" above 800 nm in their electronic spectra. XPS spectra indicated the presence of covalent bromine in the POBA and PABA polymers. Bromine retention was greater in the homopolymer as evidenced by the IR studies after aging at 350°C. Compared to HCl, MSA is found to be a more effective dopant, enhancing the conductivity of the copolymers by 10 2 -10 3 times in magnitude.

show abstract

Enhanced Stability of Photoelectrodes with Electrogenerated Polyaniline Films

Cited by 284 publications

References 12 publications

Electrochemical behaviors of polyaniline–poly(styrene‐sulfonic acid) complexes and related films

Electrochemical behaviors of polyaniline–poly(styrene‐sulfonic acid) complexes and related films

Substituent and Solvent Effects on the Electrochemical Oxidation of para- and meta-Substituted Anilines

Synthesis and characterization of electrically conducting copolymer of aniline and o‐bromoaniline using methane sulfonic acid as dopant

Contact Info

Product

Resources

About