Photoelectrochemical studies pertaining to the activity of TiO2 towards photodegradation of organic compounds

Wahl, Axel; Ulmann, M.; Carroy, A.; Jermann, B.; Dolata, M.; Kędzierzawski, P.; Chatelain, C.; Monnier, Alain; Augustyński, Jan

doi:10.1016/0022-0728(95)04023-h

Cited by 61 publications

(77 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…the semiconductor intrinsic recombination can be reduced. For this purpose, a "hole scavenger" such as methanol is usually added to the electrolyte 405 35 showed that apart from the tube layer thickness and the tube wall morphology, especially the wall surface roughness has influence on IPCE: compared to tubes obtained in water based electrolytes (rippled walls), tubes produced in organic electrolytes (smooth walls) exhibit a clearly higher IPCE.…”

Section: Electrochemistry Photoelectroctrochemistrymentioning

confidence: 99%

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

2014

View full text Add to dashboard Cite

show abstract

Section: Electrochemistry Photoelectroctrochemistrymentioning

confidence: 99%

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

2014

View full text Add to dashboard Cite

show abstract

“…At the same time, continuous TiO 2 film electrodes produced by simple thermal annealing have also not often been used in photooxidation applications [4,7,23]. Finally, despite many studies of TiO 2 electrochemistry in the dark [24][25][26][27], the Ti(III)/Ti(IV) surface electrochemistry at potentials positive to hydrogen evolution has not been correlated to its performance under UV illumination.…”

Section: Introductionmentioning

confidence: 95%

“…Most particulate TiO 2 electrodes are either anatase or mixtures of anatase-rutile while there are only a few electrophotocatalytic studies of particulate laboratory-made rutile electrodes [4,7,22,23] and none of commercial Degussa P-25 transformed to rutile by high temperature annealing. At the same time, continuous TiO 2 film electrodes produced by simple thermal annealing have also not often been used in photooxidation applications [4,7,23].…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical characterisation of thermal and particulate titanium dioxide electrodes

et al. 2005

View full text Add to dashboard Cite

The photoelectrocatalytic performance of thermal and particulate TiO 2 films on Ti electrode substrates has been studied by photovoltammetry and bulk photoelectrolysis. The thermal TiO 2 film electrodes were prepared by Ti annealing in air at 700°C and 500°C while the particulate electrodes were prepared from dispersions of Degussa P-25 TiO 2 deposited onto Ti substrates and subsequently sintered at 700°C and 500°C. The photocurrent in the absence and presence of the model organic species of oxalate as well as its photooxidation rate depends on coating surface area, type (thermal or particulate) and crystallographic form (anatase or rutile). A method is proposed to account for surface area variations by normalising the data with respect to the electroactive surface area of the TiO 2 electrodes, as estimated by their surface electrochemistry in the dark. The thermal electrodes show high photocurrents both in the absence and the presence of oxalate whereas the performance of particulate electrodes is significantly improved upon oxalate addition. Nevertheless, the efficiency of thermal 700°C TiO 2 for oxalate photooxidation during bulk photoelectrolysis is comparable to that of Degussa P-25 TiO 2 -coated electrodes.

show abstract

“…The equivalent circuit we have applied to fit the data for tantalum oxide film is shown in Fig. 7.This circuit can be derived by a more general case by omission of a capacitor due to space charge layer capacity which is much smaller than that of CPE [36,37]. All the elements of applied circuit were found to behave in a constant manner.…”

Section: Impedance Spectroscopy Analysismentioning

confidence: 99%

Anodic Oxide Films on Niobium and Tantalum in Different Aqueous Electrolytes and Their Impedance Characteristics

et al. 2016

View full text Add to dashboard Cite

The anodic oxide films were prepared on the niobium and tantalum in aqueous electrolyte mixtures containing 1 M CH3COOH + 1 M H3PO4 or 1 M CH3COOH + 1 vol.% HF or 1 M CH3COOH + 1 M H3PO4 + 1 vol.% HF at 30 V for 30 min. The barrier films were obtained on both niobium and tantalum surfaces in all electrolyte mixtures except niobium oxide film formed in 1 M CH3COOH + 1 vol.% HF which is porous in nature. The anodic oxide films were characterized by FESEM. Also, electrochemical impedance spectroscopy at open-circuit potential on Nb and Ta was applied and obtained data were analyzed by fitting with four different equivalent circuits.

show abstract

Photoelectrochemical studies pertaining to the activity of TiO2 towards photodegradation of organic compounds

Cited by 61 publications

References 44 publications

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

Photoelectrochemical characterisation of thermal and particulate titanium dioxide electrodes

Anodic Oxide Films on Niobium and Tantalum in Different Aqueous Electrolytes and Their Impedance Characteristics

Contact Info

Product

Resources

About