On the electrochemical synthesis and charge storage properties of WO3/polyaniline hybrid nanostructures

Samu, Gergely F.; Pencz, Kriszta; Janáky, Csaba; Rajeshwar, Krishnan

doi:10.1007/s10008-015-2820-0

Cited by 28 publications

(10 citation statements)

References 35 publications

(41 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this vein, SiC has been already combined with different CPs, such as polypyrrole (PPy) [ 21 , 22 ], polyaniline (PANI) [ 5 , 23 ], and poly(3-thiophene-acetic-acid) [ 24 ]. PANI is particularly attractive, because of its versatile redox behavior, excellent chemical and electrochemical stability, large capacitance, and electrochromic properties [ 25 , 26 , 27 ]. The commonality in these reports is that every synthesis was carried out by in situ oxidative chemical polymerization, differing only in the oxidizing agent employed (e.g., FeCl 3 ).…”

Section: Introductionmentioning

confidence: 99%

Controlled Photocatalytic Synthesis of Core–Shell SiC/Polyaniline Hybrid Nanostructures

et al. 2016

Self Cite

View full text Add to dashboard Cite

Hybrid materials of electrically conducting polymers and inorganic semiconductors form an exciting class of functional materials. To fully exploit the potential synergies of the hybrid formation, however, sophisticated synthetic methods are required that allow for the fine-tuning of the nanoscale structure of the organic/inorganic interface. Here we present the photocatalytic deposition of a conducting polymer (polyaniline) on the surface of silicon carbide (SiC) nanoparticles. The polymerization is facilitated on the SiC surface, via the oxidation of the monomer molecules by ultraviolet-visible (UV-vis) light irradiation through the photogenerated holes. The synthesized core–shell nanostructures were characterized by UV-vis, Raman, and Fourier Transformed Infrared (FT-IR) Spectroscopy, thermogravimetric analysis, transmission and scanning electron microscopy, and electrochemical methods. It was found that the composition of the hybrids can be varied by simply changing the irradiation time. In addition, we proved the crucial importance of the irradiation wavelength in forming conductive polyaniline, instead of its overoxidized, insulating counterpart. Overall, we conclude that photocatalytic deposition is a promising and versatile approach for the synthesis of conducting polymers with controlled properties on semiconductor surfaces. The presented findings may trigger further studies using photocatalysis as a synthetic strategy to obtain nanoscale hybrid architectures of different semiconductors.

show abstract

Section: Introductionmentioning

confidence: 99%

Controlled Photocatalytic Synthesis of Core–Shell SiC/Polyaniline Hybrid Nanostructures

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…Another typical feature of the anodization curves was the appearance of a distinct current density maximum. 41 , 42 This can be attributed to the increasing electrode surface area caused by the extensive pore formation. When the two competing reactions (oxide formation and dissolution) reach a steady state level, however, near-constant current densities stabilized at the later stages of anodization.…”

Section: Resultsmentioning

confidence: 99%

Photoelectrochemistry by Design: Tailoring the Nanoscale Structure of Pt/NiO Composites Leads to Enhanced Photoelectrochemical Hydrogen Evolution Performance

et al. 2017

Self Cite

View full text Add to dashboard Cite

Photoelectrochemical hydrogen evolution is a promising avenue to store the energy of sunlight in the form of chemical bonds. The recent rapid development of new synthetic approaches enables the nanoscale engineering of semiconductor photoelectrodes, thus tailoring their physicochemical properties toward efficient H2 formation. In this work, we carried out the parallel optimization of the morphological features of the semiconductor light absorber (NiO) and the cocatalyst (Pt). While nanoporous NiO films were obtained by electrochemical anodization, the monodisperse Pt nanoparticles were synthesized using wet chemical methods. The Pt/NiO nanocomposites were characterized by XRD, XPS, SEM, ED, TEM, cyclic voltammetry, photovoltammetry, EIS, etc. The relative enhancement of the photocurrent was demonstrated as a function of the nanoparticle size and loading. For mass-specific surface activity the smallest nanoparticles (2.0 and 4.8 nm) showed the best performance. After deconvoluting the trivial geometrical effects (stemming from the variation of Pt particle size and thus the electroactive surface area), however, the intermediate particle sizes (4.8 and 7.2 nm) were found to be optimal. Under optimized conditions, a 20-fold increase in the photocurrent (and thus the H2 evolution rates) was observed for the nanostructured Pt/NiO composite, compared to the benchmark nanoparticulate NiO film.

show abstract

“…However, the shape of this latter voltammogram (blue curve) is Results and discussion A. Kormányos Ph.D. Dissertation 84 more characteristic: it has one anodic and one cathodic peak. If the synthesis procedure was milder (UV-filtered), the shape of the voltammogram clearly exhibits the features of the electrochemical transformation of PANI [70,71]. The most important conclusions to be drawn from these observations is that the PANI/SiC nanocomposite, prepared by UVfiltered light irradiation was much more electroactive, compared to its counterpart prepared using the full output of the lamp.…”

Section: Cyclic Voltammetric Analysismentioning

confidence: 93%

“…Therefore, some of their conclusions have to be handled with caution. PANI is a particularly attractive CP, because of its versatile redox behavior (it has many different intrinsic oxidation states), excellent chemical and electrochemical stability, large charge capacitance, and electrochromic properties [69][70][71].…”

Section: Literature Backgroundmentioning

confidence: 99%

“…Importantly, chemical polymerization methods always lack the precise control over the structure and morphology of the hybrid, although the well-defined structure and morphology are prerequisite to obtain synergistic activity [90]. Thus PC [133] electrochemical [70], and PEC [71] deposition of CPs on the SC surface offer much better alternatives ( Fig. 12).…”

Section: Synthesis Of Conducting Polymer/inorganic Semiconductor Compmentioning

On the electrochemical synthesis and charge storage properties of WO3/polyaniline hybrid nanostructures

Cited by 28 publications

References 35 publications

Controlled Photocatalytic Synthesis of Core–Shell SiC/Polyaniline Hybrid Nanostructures

Controlled Photocatalytic Synthesis of Core–Shell SiC/Polyaniline Hybrid Nanostructures

Photoelectrochemistry by Design: Tailoring the Nanoscale Structure of Pt/NiO Composites Leads to Enhanced Photoelectrochemical Hydrogen Evolution Performance

Photoelectrochemistry of conducting polymer-based nanohybrid electrodes

Contact Info

Product

Resources

About