水热法制备纳米TiO_2处理垃圾渗滤液的实验研究

以钛酸四正丁酯为原料,采用水热法制备纳米TiO_2材料,经过高温煅烧后,对其降解垃圾渗滤液的催化活性进行测定,并用XRD,TEM和UV-Vis对其晶体结构进行表征。实验结果表明,水醇比、水热温度和酯加入量对TiO_2催化效率有显著的影响,当水醇比为1∶3、煅烧温度500℃、水热时间4 h、Ti(OC_4H_9)_4加入量为10 m L条件下制备的TiO_2粉末光催化活性最好,对垃圾渗滤液的降解在180 min时均可以达到73%,COD的去除率可达76.92%。

Experimental Study of Landfill Leachate Treatment with Nano TiO 2 Prepared by Hydrothermal Process

In this experiment ,taking Ti (OC4 H9 )4 and C2 H5 OH as main ingredients ,nano TiO2 is prepared by hydrothermal process ,after incinerated with high temperature , the prepared powder is used for photocatalytic degradation and also its structure is characterized by XRD ,TEM and UV -Vis .The result shows that the volume ratios of water to alcohol ,hy-drothermal temperature and amount of Ti (OC4 H9 )4 remarkably affects the photocatalytic process and when the volume ratios of water to alcohol is 1∶3 ,calcination temperature is 500 ℃ ,hydrothermal time is 4 hs and the amount of Ti (OC4 H9 )4 is 10 mL ,the TiO2 photocatalyst effect is the best ,the degradation of reactive yellow solution can reach 73% when 180 min and the removal rate of COD can reach 76 .92% .