Ag/TiO2对含酚废水的光电催化降解

Ag/TiO2对含酚废水的光电催化降解;Ag/TiO2; 光电催化; 苯酚;电解质

Electro-Photocatalytic Degradation of Phenol in Wastewater Using Ag/TiO2 Photocatalysts

In the present work, suspended Ag/TiO_2 was used as the catalyst, Ti mesh as the electrode, and a three-dimension electrode of Ti/Ag/TiO_(2) was constructed. The effect of enforced electric field was observed, and the electro-photocatalytic degradation of phenol in aqueous solution at the prepared electrode were (evaluated). The results show that the anode potential bias favors the photocatalytic degradation of (phenol). The maximum phenol removal efficiency was achieved when TiO_2 ith 1.5% silver loading was used. Two optimal voltage values for the Ag/TiO_(2) electro-photocatalysis reaction were 20 and 10 V, respectively. (Addition) of (electrolyte) NaCl increased the phenol removal efficiency of Ag/TiO_2 electro-photocatalysis from 49.7% to 93.6%. Enforced electric field can drive photogenerated electrons away from the photocatalyst (surface), and the enhanced photocatalytic activity is mainly caused by the low recombination rate of (electrons) and holes and the higher rate of electron transfer to adsorbed oxygen.