纳米TiO_2嵌入膨胀石墨处理甲基橙染料污水的研究

Research on Disposing Methyl Orange Waste Water with Nano-TiO_2 Intercalating Expanded Graphite

报道了以鳞片石墨为原材料,制备含有钛酸四正丁酯的石墨层间化合物,然后加热膨化制备纳米TiO2嵌入的膨胀石墨材料的方法,并且利用该材料对甲基橙染料污水进行了处理。实验结果显示膨胀体积越大,吸附脱色率越大;锐钛矿晶型的二氧化钛比金红石晶型的二氧化钛具有较强的光降解能力;震荡时间与光催化脱色率成正比,吸附脱色率与时间有关。利用X-衍射的方法对石墨层间化合物的存在进行了确认。

This article reports a method to fabricate nano-TiO2 intercalating expanded graphite. Flake graphite was used as raw material, and then graphite intercalation compounds （GIC） which had tetra-n-butyl titanate inside was prepared, lastly GIC was expanded to obtain the material. Meanwhile, the material was applied to dispose methyl orange waste water. The experiment result showed that adsorption discoloring ratio would be increased continuously when the expandable volume became bigger and bigger. Ray decomposing ability of nano-TiO2 anatase-type was stronger than that of nano-TiO2 rutile-type. Vibration time and photocatalysis discoloring ratio were in the direct proportion, and adsorption discoloring ratio was related to the vibration time. X-ray diffractometer was applied to attest GIC in existence.