中文摘要：

为降低金红石相纳米TiO2的光催化活性，利用氧化铝对其进行高温掺杂处理．利用X射线衍射、X射线光电子能谱、透射电镜和比表面仪对纳米TiO2进行了表征．结果表明，最佳的煅烧温度是800℃，最佳的氧化铝用量是m（Al2O3）：m（TiO2）=1：5．氧化铝的掺杂抑制了纳米TiO2的粒径和晶粒长大．随着m（Al2O3）：m（TiO2）的增大，纳米TiO2的粒径和晶粒尺寸逐渐减少，比表面积和孔容逐渐增大．从电子结合能和晶胞参数的变化可以推测高温煅烧可使Al^3＋掺杂到纳米TiO2的晶格中．氧化铝的饱和掺杂量约为m（Al2O3）：m（TiO2）=1：20，当m（Al2O3）：m（TiO2）≥1：10时，出现了晶态氧化铝的结构．

英文摘要：

The nanosized TiO2 in the rutile phase was doped with alumina to suppress its photocatalytic activity. The obtained samples were characterized by XRD, XPS, TEM and BET techniques. The results show that the optimal calcination temperature is 800℃, and the optimal Al2O3 concentration is m（Al2O3）：m（TiO2）=1：5. The growth of crystalline size and particle size is suppressed from adulteration. With the increase of m（Al2O3）：m（TiO2）, the crystalline size and particle size of nanosized TiO2 decrease progressively, at the same time, the BET surface area and pore volume of nanosized TiO2 increase. According to the difference of electron binding energy and the variety of unit cell parameters, it can be inferred that the lattice of nanosized TiO2 is doped with Al^3＋. The saturated concentration of dopant is m（Al2O3）： m（TiO2）=1：20. When m（Al2O3）：m（TiO2）≥1：10, the crystal structure of alumina appears.