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以磷钼酸铵为敏化剂,采用固相研磨法合成了磷钼酸铵敏化光催化剂TiO_2-PMoN。通过X射线衍射、红外吸收和紫外-可见吸收光谱法对样品进行表征,以罗丹明B为模拟污染物,评价其光催化活性。结果表明,所得TiO_2-PMoN催化剂为锐钛矿型和金红石型的混合类型,与纯磷钼酸铵相比,TiO_2-PMONH_4光催化剂在(360～850)cm~(-1)的吸收出现了宽化现象,磷钼酸铵敏化使TiO_2在可见光区的吸收增强,吸收边红移,太阳光照射40min,TiO_2-PMoN光催化降解罗丹明B的脱色率为95%。
Ammonium phosphomolybdate sensitizer TiO_2-PMoN was synthesized by solid-phase milling using ammonium phosphomolybdate as sensitizer. The samples were characterized by X-ray diffraction, infrared absorption and UV-Vis absorption spectroscopy. Rhodamine B was used as a simulated pollutant to evaluate its photocatalytic activity. The results show that the TiO_2-PMoN catalyst is a mixed type of anatase and rutile. Compared with pure phosphomolybdate, the absorption of TiO_2-PMONH_4 photocatalyst in the range of (360 ~ 850) cm ~ (-1) The phenomenon of broadening, the phosphorylation of TiO_2-PMoN photocatalytic degradation of rhodamine B decolorization rate of 95%, the ammonium phosphomolybdate sensitized the absorption of TiO_2 in the visible region increased, the absorption edge redshift, sunlight 40min.