Evaluation of the oxidation of organic compounds by aqueous suspensions of photosensitized hydroxylated-C60 fullerene aggregates.
Ultraviolet (UV) irradiated polyhydroxylated fullerene (fullerol) nanomaterials are examined for their potential to degrade organic compounds via reactive oxygen species (ROS) mediated by a photosensitization process. Organic compounds were selected for their sensitivity to individual species of reactive oxygen (hydroxyl radical (*OH-) for degradation of salicylic acid (SA); singlet oxygen (1O2) for degradation of 2-chlorophenol (2CP), and superoxide (O2*-) for oxidation of ethanol) and were monitored over time in aqueous suspensions of fullerol aggregates. Only the 2CP showed significant degradation underscoring the specificity of the fullerol in producing singlet oxygen in these conditions. Monitoring these processes via high performance liquid chromatography (HPLC) confirmed that organic compounds degraded primarily by ROS over a range of fullerol concentrations, pH values, and temperatures.
Chae
So-Ryong
SR
Department of Civil and Environmental Engineering, Pratt School of Engineering, Duke University, Durham, North Carolina 27708, USA.
Hotze
Ernest M
EM
Wiesner
Mark R
MR
D002021:Buffers; D002733:Chlorophenols / Q000737:chemistry; D004058:Diffusion / Q000528:radiation effects; D037741:Fullerenes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration / Q000528:radiation effects; D007477:Ions; D007700:Kinetics; D008970:Molecular Weight; D053758:Nanoparticles / Q000737:chemistry; D009930:Organic Chemicals / Q000737:chemistry*; D010084:Oxidation-Reduction / Q000528:radiation effects; D017319:Photosensitizing Agents / Q000737:chemistry*; D012996:Solutions; D013535:Suspensions; D013696:Temperature; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry*
D002021:Buffers; D002733:Chlorophenols; D037741:Fullerenes; D007477:Ions; D009930:Organic Chemicals; D017319:Photosensitizing Agents; D012996:Solutions; D013535:Suspensions; C408042:fullerol C60(OH)24; D014867:Water; C030683:2-chlorophenol