Visible‐Light‐Driven Production of Poly(α‐terthiophene)–Au Nanoparticle Functional Hybrid Material

Abstract

An ovel one-step visible-light-driven synthesis of Au nanoparticle-poly(a-terthiophene)( nAu-poly(a-TT)) functional nanocomposites and their electrocatalytic and photoelectrocatalytic applications are described. The visible-lightinduced electron transfer between a-TT and Au III ion yields nAu-poly(a-TT) nanocomposite material. The nAu-poly(a-TT) shows characteristic diffraction corresponding to the well-organized lamellar structure of the polymer and Au nanoparticles. The nanoparticles inside the polymer matrix increase the interlayer spacing and stacking distance of the polymer planes. Remarkable enhancement in the Raman signature of poly(a-TT) due to the embedded Au nanoparticles was observed. The nanocomposite favors the selective electrochemical oxidation of hydrophobic analytes. The photoexcitation of the nanocomposite with white light at potentials more negative than À0.3 V( Ag/AgCl) yields cathodic photocurrent, which is > 500 times highert han that of the free poly(a-TT).

Facile Formation of Nanodisk‐Shaped Orthorhombic SnS Layers from SnS2 Particles for Photoelectrocatalytic Hydrogen Production

“…All of these devices were prepared with the SnS films thicker than 400 nm. Preparation of thinner SnS films with thickness less than 100 nm with a high purity and a crystallinity in an one‐step process would be desired for enhancing photo‐efficiency in a photoelectrochemical cell …”

“…Preparation of thinnerS nS films with thickness less than 100 nm with ah igh purity and ac rystallinityina no ne-step process would be desired for enhancing photo-efficiency in ap hotoelectrochemicalcell. [10,11,34,35] Nanoscaled SnS samples prepared via the chemical route are prepared through phase transformation routes such as nanospheresm etastable zinc blende SnS phase to nanoribbons of SnS through metastable-to-stable phase transition, [28] and the structural phase transition from 2D hexagonal-SnS 2 to orthorhombic-SnS using the chemical route. [16] Such phase transitional routes produce well-organized controlled stacks of photoactive orthorhombic SnS layers.…”

Novel bio-solar hybrid photoelectrochemical synthesis for selective hydrogen peroxide production

“…The pTTh exhibited diffraction peaks at 2θ of 13.2°(200) corresponding to the well-ordered lamellar structure of the polymer, and 2θ of 24.4°associated with the (020) reflection or intermolecular π-π* stacking interaction. 36,37 The pTTh-coated GP photocathode possessed rather sharp diffraction peaks, suggesting high crystallinity of the synthesized polymer. 38…”