N掺杂TiO_2的制备和光催化性能

The Preparation of N-doped TiO_2 and Its Photocatalytic Property

以钛酸四丁酯、酚醛树脂、无水乙醇、冰醋酸、盐酸胍和P123为原料制备氮掺杂TiO2,采用XRD、SEM、TEM、XPS、N2吸附-脱附和UV-Vis等手段对其进行了表征。以对氨基苯磺酸为模型污染物,研究了氮源加入量对氮掺杂氧化钛光催化性能的影响。结果表明,所制备的样品为锐钛矿型TiO2,一次粒径约为13.7 nm,二次粒径约为100 nm,颗粒间有堆积的介孔;氮的掺杂使TiO2在可见光区具有显著的吸收。随着N源加入量的提高,在可见光区的吸收增强,光催化效果也随之增强。

N-doped TiO2 was prepared by the quick polymerization of Tetrabutyltitanate and phenolic resin with solvent thermal reactions using tetrabutyltitanate, phenolic resin, absolute ethanol, acetic acid, guanidine hydrochloride （GHC） and P123. The N-doped TiO2 was characterized by XRD, SEM, TEM, XPS, N2 adsorption-desorption and UV-Vis. We also investigated the effect of GHC adding amount to the photocatalytic activity by taking 4-aminobenzenesulfonic acid as a model test. The results showed that the N-doped TiO2was composed of anatase phase with a particle size about 13.7 nm and the aggregate about 100 nm. There were lots of mesoporous between the particles. The doping of N element resulted in a red shift of the absorption edge. The absorption of visible light and photocatalytic activity of N-doped TiO2 are promoted with the increase of the adding amount of nitrogen source.The result was consistent with the atom fraction in N-TiO2 measured by XPS.