经有机分子修饰后二氧化钛对光降解亚甲基蓝的影响

Effect of titanium dioxide on photodegradation of methylene blue by organic molecule modification

本文通过溶胶-凝胶法分别制备了十四胺、十六胺、十一酸和十二烷二酸四种不同有机分子修饰的二氧化钛材料,然后通过X射线衍射(XRD)、红外光谱(FI-IR)和透射电镜(HRTEM)对二氧化钛的修饰效果进行表征,结果表明,修饰后的二氧化钛完全为锐钛矿型,修饰效果较好。通过亚甲基蓝溶液光降解实验,比较四种有机分子修饰后的二氧化钛光催化性能,结果发现,酸类有机分子修饰后的二氧化钛比胺类分子修饰后的二氧化钛具有更好的光催化性能。

Four different organic molecular modified titanium dioxide materials such as tetradecylamine, hexadecylamine, undecanoic acid and dodecanedioic acid were prepared by sol-gel method. Characterization of the modification effect of titanium dioxide by X-ray diffraction (XRD), infrared spectroscopy (FI-IR) and transmission electron microscopy (HRTEM). The results show that the modified titanium dioxide is completely anatase and the modification effect is better. The photocatalytic properties of the four organic molecules modified by titanium dioxide were compared by photodegradation experiments of methylene blue solution. The results show that the titanium dioxide modified by acid organic molecules has better photocatalytic performance than the modified titanium dioxide.