The plasma reactor consisted of a co-axial organic glass cylinder
(60 mm at effective diameter and 250 mmin effective length), with
an inner discharge electrode and a quartz tube (diameter: 15 mm),
the negative electrode was directly connected with the solution.
A copper rod was nested with a steel needle (No. 9), and used as
the inner electrode, the discharge was drived by a high voltage
AC power source (CTP-2000K, Nanjing Suman Electronics Co.,
Ltd., China). The air from the aerometer was bubbled through a
quartz tube and the catalyst was suspended with a stirring mixer