W/Mo co-doped BiVO_4 for photocatalytic treatment of polymer-containing wastewater in oilfield

摘要

Polymer flooding is an effective way to enhance oil recovery (EOR). However, the treatment of the oily wastewater becomes an urgent issue. Photocatalysis is a promising approach for this purpose. In this report, W/Mo co-doped BiVO_4 particles are synthesized by hydrothermal method. W/Mo co-doping could promote an effective separation of photogenerated carriers reflecting from the 6 times higher photocurrent density compared to pure BiVO_4. The photodegradation of partially hydrolyzed polyacrylamide (HPAM) over 0.5 at.% W and 1.5 at.% Mo co-doped BiVO_4 is 43% under UV-vis light irradiation for 3 h, which is much higher than that of pure BiVO_4(18%).