摘要：

以硫酸氧钛（TiOSO₄）为钛源，过氧化氢（H₂O₂）为络合剂，采用低温水热法合成了过氧改性纳米TiO₂溶胶。利用X射线衍射、红外光谱和透射电镜对合成产物进行了表征，并以苯酚废水为处理对象，对合成产物光催化降解苯酚的影响因素进行了考察。结果表明，合成的产物为直径约10 nm、长约50 nm、结晶良好、分散均匀的锐钛矿型纳米TiO₂溶胶；当TiO₂质量浓度为200 mg/L，体系pH为4~8，苯酚初始质量浓度<20 mg/L时，在紫外光条件下反应180 min，苯酚降解率可达98%。

关键词: TiO₂溶胶, 苯酚, 光催化降解

Abstract:

Using titanyl sulfate(TiOSO₄) as titanium source, and peroxide(H₂O₂) as complex agent, preoxo-modi-fied nano-TiO₂ sol has been synthesized by hydrothermal method at low temperature. The synthesized product is characterized by X-ray diffraction patterns(XRD), fourier transform infrared spectroscopy(FT-IR), and transmission electron microscope(TEM). Using phenol wastewater as an object to be treated, the influencing factors of the sol on the photocatalytic degradation of phenol are investigated. The results show that the diameter and length of the synthesized product is 10 nm and 50 nm, respectively. It has a well-crystallized and evenly-distributed anatase-type structure. When TiO₂ mass concentration is 200 mg/L, system pH 4-8, and initial concentration of phenol less than 20 mg/L, reaction time 180 min, the highest degradation rate of phenol reaches 98% under ultraviolet irradiation.

Key words: TiO₂ sol, phenol, photocatalytic degradation

中图分类号: 

• X703.1