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通过溶胶-凝胶法成功合成了TiO2/Nd2Zr2O7复合氧化物。采用X射线衍射、透射电子显微镜、扫描电子显微镜对材料进行了表征,并对其比表面积进行了测试。结果表明:TiO2均匀地包覆在了Nd2Zr2O7颗粒的表面,其包覆量为50.36%(质量分数);TiO2/Nd2Zr2O7复合物的BET比表面积为25.62m2/g,比Nd2Zr2O7纳米晶的表面积3.48m2/g大得多。通过降解甲基橙评价产物的光催化活性,证实TiO2/Nd2Zr2O7复合物具有好的光催化活性。通过Nd2Zr2O7,TiO2和TiO2/Nd2Zr2O7在20min内降解甲基橙的降解量分别为20.1%,70.7%和88.2%。
The TiO2 / Nd2Zr2O7 composite oxide was successfully synthesized by sol-gel method. The materials were characterized by X-ray diffraction, transmission electron microscopy and scanning electron microscopy, and their specific surface area was tested. The results show that TiO2 coating on the surface of Nd2Zr2O7 particles is 50.36% (mass fraction). The BET specific surface area of TiO2 / Nd2Zr2O7 composite is 25.62m2 / g, which is more than that of Nd2Zr2O7 nanocrystals. The surface area of Nd2Zr2O7 nanocrystals is 3.48m2 / g much larger. By degrading methyl orange, the photocatalytic activity of the product was evaluated, and it was confirmed that the TiO2 / Nd2Zr2O7 composite has good photocatalytic activity. Degradation of methyl orange by Nd2Zr2O7, TiO2 and TiO2 / Nd2Zr2O7 in 20min were 20.1%, 70.7% and 88.2%, respectively.