Electrochemically assisted photocatalysis. TiO[sub 2] particulate film electrodes for photocatalytic degradation of 4-chlorophenol

Journal Article · Thu Sep 02 04:00:00 EDT 1993 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100137a033· OSTI ID:5575546

Vinodgopal, K ^[1]; Hotchandani, S ^[2]; Kamat, P V ^[3]

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1. Indiana Univ. Northwest, Gary, IN (United States)
2. Universite du Quebec, Trois Rivieres, Quebec (Canada) Univ. of Notre Dame, IN (United States)
3. Univ. of Notre Dame, IN (United States)

A commercially available TiO[sub 2] powder (Degussa P25) has been used to prepare thin particulate films on conducting glass plates. These semiconductor particulate films are photoelectrochemically active with properties similar to an n-type semiconductor. The recombination between the photogenerated charge carriers can be suppressed by applying an external anodic bias. Electron scavengers, such as oxygen, affect the photocurrent generation by competing for the photogenerated electrons. These particulate films provide a convenient method for accelerating the photocatalytic reaction by applying an external bias. For example, the rate of photocatalytic degradation of 4-chlorophenol greatly increases when the TiO[sub 2] particulate film electrode is maintained at an external anodic bias (0.6 V vs SCE) during the UV photolysis. 26 refs., 6 figs.

• OSTI ID: 5575546
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:35; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400400 -- Electrochemistry
400500* -- Photochemistry
AROMATICS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
ELECTROCHEMICAL CELLS
ELECTRODES
EQUIPMENT
FILMS
HYDROXY COMPOUNDS
MATERIALS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHENOLS
PHOTOCHEMICAL REACTIONS
PHOTOELECTROCHEMICAL CELLS
PHOTOLYSIS
SEMICONDUCTOR MATERIALS
SOLAR EQUIPMENT
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS