To study anode effect on electro-Fenton reaction

three kinds of electrode

including SnO2/Ti electrode with nanocoating(DSA)

activated carbon fiber(ACF)and graphite paper(GE)were combined to form three electrode couples

and they were applied to degrade activated brilliant red X3B. The order of decoloration and mineralization rate for these various electrode couples are as follows:a(cathode/ACF

anode/DSA)>b(cathode/ACF

anode/GE)>c(cathode/GE

anode/DSA).Under the optimum conditions

for electrode couple a

X3B was decolored completely in 90 min

mineralization rate and average current efficiency(ACE)in 180 min were 75.3% and 56.7% respectively.XRD and SEM images implied that structure of ACF and DSA were stable for electro-Fenton reaction conditions.The CV curves of electrodes suggested that the direct anodic oxidation was not involved in electro-Fenton system.The flurosence method was used to detect oxidation activity species

the results indicated that result of X3B degradation was in proportional to amount of hydroxyl radical formed.The study demonstrated that DSA can enhance efficiency of electro-Fenton reaction by a pathway activating H2O2 to hydroxyl radical.