微生物燃料电池强化锐钛矿光电催化降解苯酚废水研究

The study of enhanced photoelectrocatalytic degradation for phenol by anatase electrode with the cooperation of microbial fuel cell

以溶胶凝胶-法制备锐钛矿电极,并以此构建微生物燃料电池(MFC)强化锐钛矿光电催化系统。在0.3,0.6 V条件下,3 h苯酚降解率分别为56.5%,82.6%,拟合反应速率常数k分别为0.29 h-1(R2=0.994),0.58 h-1(R2=0.996),远高于锐钛矿光催化(18.2%)与电催化(33.4%)组。三轮循环降解实验,降解率皆高于80%,表明MFC联合锐钛矿共同作用后,系统表现出了极为显著的光电催化降解苯酚水平。

Anatase electrode was synthesized by sol-gel method. The photoelectrocatalysis system for the cooperation of microbial fuel cell and anatase electrode was successful constructed. With 0. 3,0. 6 V condition,after 3 h the phenol degradation rate was 56. 5%,82. 6% respectively. And fitting the first-order kinetics reaction model the constant of reaction rate kwas 0. 29 h-1（ R2= 0. 994） and 0. 58 h-1（ R2=0. 996）. Which were higher than photocatalysis of anatase（ 18. 2%） and electrocatalysis group（ 33. 4%）. The three cycle degradation rates of degradation were all higher than 80%,indicating that the combined system showed remarkable photoelectrocatalytic degradation level for phenol.