Photocatalytic oxidation of 4-chlorophenol on titanium dioxide: A comparison with {gamma}-radiolysis

Conference · Tue Feb 01 00:00:00 EST 1994

OSTI ID:10122027

Stafford, U; Gray, K A; Kamat, P V

To gain useful insight into the mechanistic details of the TiO{sub 2} photocatalyzed oxidation of halogenated organic compounds, the intermediates produced during the photocatalytic degradation of 4-chlorophenol (4-CP) have been compared with those produced during {gamma}-radiolysis. Photocatalytic degradation of 4-CP produces aromatic intermediates consistent with {gamma}-radiolytic hydroxyl radical oxidation, but the distribution of the intermediates differs. The surface area of TiO{sub 2} has an important influence on the intermediate distribution suggesting that the presence of surface influences the reaction pathway. The course of photocatalytic transformation of 4-CP involves a combination of hydroxyl radical oxidation, direct electron transfer and surface chemical reactions contributing to the disappearance of 4-CP and its reaction intermediates in TiO{sub 2} slurries.

• Research Organization: Notre Dame Univ., IN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76ER00038
• OSTI ID: 10122027
• Report Number(s): DOE/ER/00038-3676; CONF-940248-1; ON: DE94006510; BR: 35AK01030/35HA02000
• Resource Relation: Conference: 4. annual symposium on chemical oxidation,Nashville, TN (United States),16-18 Feb 1994; Other Information: PBD: [1994]
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ORGANIC CHLORINE COMPOUNDS
DECOMPOSITION
RADIOLYSIS
TITANIUM OXIDES
CATALYTIC EFFECTS
PHENOLS
CATALYSIS
PHOTOLYSIS
COMPARATIVE EVALUATIONS
GAMMA RADIATION
OXIDATION
SURFACE AREA
400500
540320
400600
PHOTOCHEMISTRY
CHEMICALS MONITORING AND TRANSPORT
RADIATION CHEMISTRY