Fabrication of High Conductivity TiO₂/Ag Fibrous Electrode by the Electrophoretic Deposition Method

Abstract

TiO2 deposited on a membrane of Ag fibers was prepared as a photoelectrochemical cell electrode. Ag fibers were made by reduction of Ag complexes on cellulose fibers, followed by burning out the template. TiO2 photocatalyst layers were grown on the fibers by electrophoretic deposition of TiO2 nanoparticles. Ag fibers could be uniformly deposited. Photocatalytic tests by dye decomposition and electrochemical impedance spectroscopy (EIS) under UV illumination demonstrate that Ag fibers act as a good substrate that provides both high surface area and good separation of photogenerated electron−hole pairs and causes the enhancement of photocatalytic activity in comparison with a thin film of TiO2.

Electrophoretic deposition of nanoscale TiO2: technology and applications

“…It was evaluated how the deposition time influences the doping level and therefore how it affects the thickness, roughness or band gap of the titania phase. By coating a silver membrane made out of silver fibers with titania nanoparticles previously synthesized, Hosseini et al [120] demonstrated the feasibility of EPD to coat complex shaped substrates and showed that noble metal fibers can be considered as effective substrates to deposit titania for photocatalytic applications, since they provide high surface area and ready diffusion of ions. Different substrates (titanium or platinum/silicon) were used by Liepina et al [121] to deposit titania nanoparticles from a titania sol using 1 V and 1 to 5 h of deposition time.…”

Nanoparticulate Hollow TiO2 Fibers as Light Scatterers in Dye‐Sensitized Solar Cells: Layer‐by‐Layer Self‐Assembly Parameters and Mechanism

“…Polyelectrolyte solutions were prepared with a concentration of 0.02 m (based on repeating unit) and pH of around 8. The colloidal TiO 2 dispersion (sol) was synthesized according to our previously reported recipe [18,37] and briefly is based on a sol-gel process which starts by mixing titanium tetraisopropoxide (Merck), H 2 O 2 (Merck), and H 2 O in volume proportions of 6:45:100, respectively. The produced sol is amorphous, but heating to reflux for 10 h at 90 8C gives a crystalline sol.…”

“…TiO 2 has been deposited on cellulose fibers by a variety of methods; [16][17][18] however, LbL deposition has the advantage of providing uniform nanoparticulate coatings on complex subHollow structures show both light scattering and light trapping, which makes them promising for dye-sensitized solar cell (DSSC) applications. In this work, nanoparticulate hollow TiO 2 fibers are prepared by layer-by-layer (LbL) self-assembly deposition of TiO 2 nanoparticles on natural cellulose fibers as template, followed by thermal removal of the template.…”

Three dimensional Z-scheme (BiO) 2 CO 3 /MoS 2 with enhanced visible light photocatalytic NO removal

“…6b, the Nyquist radii of the (BiO)2CO3/MoS2 composites are smaller than that of (BiO)2CO3 under visible light irradiation. It is reported that the smaller arc in an EIS Nyquist plot implies a smaller charge-transfer resistance on the electrode surface [48]. Thus, the addition of MoS2 could efficiently promote the migration of photo-generated holes and electrons.…”