[Photocatalytic degradation of hexafluorobenzene by tungstophosphoric acid].
We verified that C6F6, a typical perfluorine compound, could be photocatalytic degraded by H3PW12O40. The defluorination of C6F6 was determined as a function of irradiation time, pH, initial concentration of H3PW12O40, and additives as well. The defluorination of C6F6 increased with the irradiation time. Acid condition, especially pH = 1.0 is preferred. 3 mL solution of 2.0 x 10(-4) mol/L C6F6 and 5.0 x 10(-6) mol/L H3PW12O40 was irradiated for 20 min and the defluorination of C6F6 was equal to 208.1%. O2, KMnO4 and K2S2O8 added in the solution were able to increase the defluorination of C6F6 via oxidating [PW12O40](4-). The defluorination of C6F6 would decline in the presence of alcohol and aromatic compounds.
Huang
Li
L
Institute of Environmental Science, Fudan University, Shanghai 200433, China.
Chen
You
Y
Dong
Wen-Bo
WB
Zhang
Ren-Xi
RX
Hou
Hui-Qi
HQ
D002384:Catalysis / Q000528:radiation effects; D005466:Fluorocarbons / Q000032:analysis / Q000737:chemistry*; D010084:Oxidation-Reduction / Q000528:radiation effects; D010756:Phosphoric Acids / Q000737:chemistry*; D010777:Photochemistry; D010782:Photolysis / Q000528:radiation effects; D017973:Tungsten Compounds / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
C519880:12-tungstophosphoric acid; D005466:Fluorocarbons; D010756:Phosphoric Acids; D017973:Tungsten Compounds; C003005:hexafluorobenzene