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以TiCl3为钛源,在140℃下采用溶剂热法在不同有机胺体系中一步合成二氧化钛晶体.采用X射线衍射、紫外-可见吸收光谱、元素分析、傅里叶变换红外光谱以及X射线光电子能谱对所得粉体进行了表征.结果表明,该方法制备的二氧化钛晶体吸收带边明显红移至可见光区,其中,在乙二胺体系中制备的二氧化钛晶体对可见光的吸收明显优于三乙胺和二乙胺体系.在乙二胺体系中制备的二氧化钛对可见光响应的原因可归结为部分氮原子取代氧原子进入了二氧化钛晶体结构中.苯酚的光催化降解实验表明,该掺氮型二氧化钛在可见光照射下具有较好的光催化活性.
Titanium dioxide crystals were synthesized in different organic amine systems by solvothermal method using TiCl3 as the titanium source at 140 ℃. X-ray diffraction, UV-Vis absorption spectra, elemental analysis, Fourier transform infrared spectroscopy and X-ray photoelectron energies The results showed that the absorption band edge of the TiO2 crystal prepared by this method was red-shifted to the visible light region, and the absorption of visible light by titania crystals prepared in the ethylenediamine system was obviously superior to that of triethylamine And diethylamine system.The reason for the visible light response of titania prepared in ethylenediamine system can be attributed to the substitution of some nitrogen atoms for the oxygen atoms into the crystal structure of titania.The photocatalytic degradation experiments of phenol show that the nitrogen- Visible light has good photocatalytic activity.