人工晶体学报2013，Vol.42Issue(2)：290-298,9.
TiO2/蒙脱石复合物中纳米TiO2的相变与光催化性能
Phase Transition and Photocatalytic Properties of TiO2 in TiO2/montmorillonite Nano-composite
摘要
Abstract
The Ti02/montmorillonite nano-composites were prepared by hydrolysation-intercalation method using TiOSO4·2H2O as a precursor of TiO2 and montmorillonite as substrate. The TiO2/montmorillonite samples calcinated at the different temperatures were characterized by X-ray diffraction method, and the phase transition and the grain sizes of TiO2 in the TiO2/montmorillonite samples were studied. The adsorption and photocatalytic decoloration properties of the samples for Methylene Blue in solution were discussed. The results showed that the heating temperatures have a significant influence on the TiO2 phase transition, the relative contents and the grain sizes of anatase and rutile, and the photocatalytic decoloration properties of the TiO2/montmorillonite composite samples. For TiO2/montmorillonite composite sample calcinated at 700 ℃, the crystal size of anatase is only 13. 7 nm, meanwhile the photocatalytic decoloration rate and the total decolorization ratio were up to 42. 7% and 79. 8% respectively. After calcined at 1100℃ , the relative content of anatase in TiO2/montmorillonite composite sample reaches 55.7% , its grain size is 55.8 run, and the photocatalytic decoloration rate and the total decolorization ratio are still 32.5% and 46.6%. Compared with pure TiO2 nano-particle sample, TiO2 in TiO2/montmorillonite composite samples have a higher phase transition temperatures from anatase phase to ruble phase, smaller grain sizes, and stronger photocatalytic decoloration properties. Montmorillonite structure layer has a significant blocking effect on the phase transformation and the grain growth of TiO2 in TiO2/montmorillonite composite.关键词
热处理/TiO2/蒙脱石纳米复合材料/锐钛矿/吸附脱色性与光催化脱色性Key words
heating treatment/TiO2/montmorillonite nano-composite/anatase/adsorption and photocatalytic decoloration properties分类
化学化工引用本文复制引用
吕霞,彭同江,孙红娟,古朝建..TiO2/蒙脱石复合物中纳米TiO2的相变与光催化性能[J].人工晶体学报,2013,42(2):290-298,9.基金项目
国家自然科学基金(41072033) （41072033）
中国科学院矿物学和成矿学重点实验室开放基金(KLMM20110201) （KLMM20110201）
