TiO_2-AC复合材料的制备及其光催化性能的实验研究

Preparation of TiO_2-AC composite material and experimental study on its photocatalysis property

以竹子为原材料,CO2-K2CO3为活化剂,利用正交实验法制备竹质活性炭。对竹质活性炭进行TiO2负载,再通过烧结制成TiO2-AC复合材料。采用BET比表面积、扫描电镜及X射线衍射等方法对复合材料的结构进行分析,最后通过有机废水的降解实验考察了复合材料的光催化性能。结果表明:竹质活性炭的比表面积可达1959 m2/g,中孔孔隙较发达;TiO2-AC复合材料比表面积大幅减小,中孔含量变化更明显;较低温度烧结的复合材料对含有DMF水样的光催化降解效果较好,降解率可达到99%。

Taking CO2 - K2CO3 as activating agent, bamboo as raw material, first prepared bamboo-based activated carbon with orthogonal experimental method. Then the bamboo-based activated carbon was used as carrier for titanium dioxide （TiO2 ） loading to produce TiO2 -AC composite material by sintering. The BET specific surface area,scanning electron microscope and X-ray diffraction analysis were applied to characterize the structure of composite material. The photocatalysis property of composite material was estimated by degradation ratio of organic waste in organic wastewater. The results show that, tim BET surface area of bamboo-based activated carbon can reach 1959 m2/g,the mesopore structure is well developed. The BET surface area of TiO2-AC composite material decrease significantly, especially the mesopore content. The TiO2 -AC composite material sintered under low temperature presents high photocatalysis property,the DMF dezradation ratio can reach un ta 99 hereon!