论文部分内容阅读
本文用电化学方法制备了二氧化钛纳米管,并用扫描电子显微镜和X衍射对其形貌及组成进行了表征.进一步研究了木质素的两个模型化合物1-(3,4-dimethoxyphenoxy)-2-(2-methoxyphenoxy)-1,3-propanediol(DMP)和3-hydroxy-1-(3,4-dimethoxyphenoxy)-2-(2-methoxyphenoxy)-1,3-propanone(HDM)在二氧化钛纳米管上的光电氧化.在DMP的光电氧化过程中,一个新的紫外吸收峰出现在波长304 nm处.虽然中间体的形成速率随着浓度的增加而增加,却随着温度的增加而减少.尽管HDM和DMP在结构上有很小的差别,在氧化过程中DMP却呈现出很小的吸光度变化,表明HDM不易被光电氧化.量子化学计算结果也表明,DMP更容易被氧化,这个结果与光电氧化的结果相吻合.
In this paper, titania nanotubes were prepared by electrochemical method and their morphology and composition were characterized by scanning electron microscopy and X-ray diffraction. Two compounds, l- (3,4-dimethoxyphenoxy) -2- (2-methoxyphenoxy) -1,3-propanone (DMP) and 3-hydroxy-1- (3,4-dimethoxyphenoxy) -2- Photoelectrochemical oxidation.A new UV absorption peak occurs at a wavelength of 304 nm during photoelectrochemical oxidation of DMP.Although the intermediate formation rate increases with increasing concentration, it decreases with increasing temperature.Although HDM And DMP in the structure is very small difference, DMP showed a small change in absorbance during oxidation, indicating that HDM is not easy to be photooxidized.Quantum chemical calculation results also show that DMP is more easily oxidized, the result with the photooxidation The results match.