掺Fe^(3+) A-TiO_2水热法制备及其紫外光下催化降解水杨酸

Study on the Photo-catalyzing Degradation of Salicylic Acid using Prepared Fe^(3+)-doping Anatase TiO_2 under UV-light

探索了自制光催化剂掺Fe^(3+)A-TiO_2对水杨酸溶液在一定条件下的降解效果,并寻找最佳优化条件。结果表明:水杨酸起始溶液浓度为50 mg/L,溶液pH为6时(水杨酸自身pH),加入自制的0.21 g/L掺Fe^(3+)(摩尔比)为1.6%的A-TiO_2,室温下(T=18℃)在波长λ=254 nm的紫外光照射下,磁力快速搅拌反应2 h,水杨酸的最大降解率达到35.18%。同上条件下撤去光源进行吸附量测试,发现反应1 h达到吸附平衡。

The photo-catalyzing degradation of salicylic acid on as-prepared Fe^3＋ -doping anatase TiO2（ i.e.A-TiO2） under UVlight was studied. The effects of initial concentration of salicylic acid,Fe^3＋ -doping amount,illumination time and p H on the degradation of salicylic acid were examined. Experiment results show that the degeneration rate of salicylic acid is 35. 18%under follow optimizing conditions： salicylic acid initial concentration 50 mg/L（ pH = 6）,Fe^3＋ -doping A-TiO2 dosage 0.21 g /L,Fe^3＋ -doping amount 1.6%（ molar fraction）,reaction temperature 18℃ and illumination time 2 h under UV- light（ λ =254 nm）. At the same condition,the adsorption equilibrium is reached for 1 h when removing the light resource.