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为满足低温制备N掺杂TiO2可见光催化材料的需要,采用溶胶-凝胶法,以十六烷基三甲基氯(溴、碘)化铵为掺杂剂,在回流条件下与TiO2纳米晶溶胶直接反应,制备TiO2光催化材料T5100-C、T5100-B、T5100-I。通过XPS分析,只有样品T5100B成功地在TiO2晶格中掺入了N、Br。UV-Vis漫反射吸收光谱和亚甲基兰(MB)的可见光降解实验表明,样品T5100-B具有良好的可见光响应和光催化活性;而样品T5100-C和T5100-I没有明显的可见光响应和可见光催化活性。N的掺杂使得样品T5100-B具有明显的可见光吸收,而Br的掺杂可以阻止光生电子/空穴对的复合,二者共同提高可见光催化活性。
In order to meet the need of low-temperature preparation of N-doped TiO2 photocatalyst, the sol-gel method was used with cetyltrimethylchloride (bromine, iodine) Sol direct reaction to prepare TiO2 photocatalytic material T5100-C, T5100-B, T5100-I. By XPS analysis, only Sample T5100B successfully incorporated N, Br into the TiO2 lattice. UV-Vis diffuse reflectance absorption spectroscopy and methylene blue (MB) visible light degradation experiments showed that the sample T5100-B has a good visible light response and photocatalytic activity; while the sample T5100-C and T5100-I no visible visible light and visible light Catalytic activity. The doping of N makes the sample T5100-B have obvious visible light absorption, while the doping of Br can prevent the recombination of photogenerated electron / hole pairs, both of which can enhance the visible light catalytic activity.