【摘要】 锐钛矿相TiO2的光催化活性高于金红石相。采用化学溶液分解法制备了Al掺杂锐钛矿TiO2,并用硝酸对其进行酸化处理。利用TG-DTA、XRD、FTIR、BET和UV-vis等手段对样品进行了表征,通过对甲基橙的降解分析了酸化处理对Al掺杂TiO2光催化活性的影响。结果表明:掺杂Al能有效抑制TiO2由锐钛矿向金红石转变。酸化处理因能增大Al掺杂TiO2的比表面积而使其光催化活性提高。Al/Ti掺杂比为1∶4的样品在酸化处理后具有的光催化活性最高,60min后对甲基橙的降解达到100%。更多还原

【Abstract】 The anatase phase has a far higher photocatalytic activity than the rutile phase.Al doped TiO2 photocatalysts were prepared by a chemical solution decomposition method and treated with concentrated nitric acid.The samples were characterized by TG-DTA,XRD,FTIR,BET and UV-Vis,and the effects of acid treatment on the photocatalytic activities of the Al doped TiO2 samples were analyzed by degradation of methyl orange.The results suggested that Al-doping could effectively inhibit the phase transformation from anatase to rutile.The specific surface area and photocatalytic activity of Al doped TiO2 were increased by acid treatment.The Al doped TiO2(Al∶ Ti=1∶ 4) by acid treatment delivered the highest photo-catalytic activity,and the degradation ratio of methyl orange was 100% after 60 min.更多还原