摘要
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 sensitized nano-titania photocatalysts （TiO2-PMoN） were pre- pared using ammonium phosphomolybdate as sensitizer by solid-phase grinding method. The as-prepared samples were characterized by XRD, FT-IR and UV-vis techniques. Photocatalytic activity of the as-pre- pared samples was investigated using rhodamine B as the model pollutant. The results indicated that the phase of TiO2-PMoN was anatase and rutile mixed phase;compared with pure ammonium phosphate, the absorption peak of TiO2-PMoN photocatalyst in infrared range of （360 -850） cm- 1 was broaden;absorb- ency of ammonium phosphomolybdate sensitized nano-TiO2 photoeatalyst was extended remarkablely into the visible region compared with pure Ti02. Photocatalytic experimental results indicated that TiO2-PMoN photocatalyst exhibited much greater photocatalytie activity than TiO2. The degradation rate of rhodamine B over TiO2-PMoN photocatalyst were 95% under sunlight for 40 min.
出处
《工业催化》
CAS
2010年第5期68-73,共6页
Industrial Catalysis
基金
国家自然科学基金(20773104)
教育部新世纪优秀人才支持计划(NCET-06-0891)
教育部重点科研基金(208143)
陕西省教育厅专项科研基金(07JK435
09JK817)
陕西省重点实验室重点科研基金(08JZ81)
延安大学科研基金项目(KYQD2008-001)
关键词
催化化学
纳米二氧化钛
磷钼酸铵敏化
光催化活性
catalytic chemistry
nano-titania
anamonium phosphomolybdate sensitization
photocatalytic activity
