In this article, the photocatalytic reaction of aniline and 4-amino N, N dimethyl aniline with methanol, ethanol and isopropanol on anatase TiO2 nano-particles under UV (365 nm wavelength) irradiation was examined. The concentration of unreacted aryl amines and products was measured by gas chromatography picks integration, and then the products were identified by mass spectroscopy analysis. By making a comparison within the rates of photocatalysis of each aryl amine in different alcohols under various irradiation times, it was revealed that, in all cases, the sequence of photocatalysis rate was methanol > ethanol > isopropanol. In reactions where the concentrations of aryl amine were lower than 10 mmol/L, imines were the main products and alkylation of amines was not observed. In the higher concentration of aryl amines, oxidation and dimerization occurred.
本文研究了在紫外(365 nm 波长)照射下,
苯胺和 4-
氨基 N,N 二甲基
苯胺与
甲醇、
乙醇和
异丙醇在
锐钛矿型 TiO2 纳米粒子上的光催化反应。采用气相色谱积分仪测定未反应的芳胺和产物的浓度,然后通过质谱分析鉴定产物。通过比较各芳胺在不同
醇类中在不同照射时间下的光催化速率,发现在所有情况下,光催化速率的顺序都是
甲醇>
乙醇>
异丙醇。在芳胺浓度低于10 mmol/L的反应中,
亚胺是主要产物,没有观察到胺的烷基化。在较高浓度的芳胺中,发生氧化和二聚。