【摘要】 通过水热法制备了BiOBr/TiO₂/MIL-125（Ti）光催化材料,采用TEM、XRD、UV-vis DRS等表征手段对催化剂的形貌、结构、光学性能等性质进行分析,并研究其在紫外光照射下对硝酸盐的转化率和氮气选择性.结果表明,复合材料0.5%BiOBr/TiO₂/MIL-125（Ti）在365 nm紫外光下照射30 min后硝酸盐转化率达到88.94%,氮气选择性达到97.11%,明显高于BiOBr和MIL-125（Ti）.文中对光催化还原活性提高的原因进行了细致分析.更多还原

【Abstract】 BiOBr/Ti O₂/MIL-125（Ti） photocatalytic materials were prepared by hydrothermal method. The morphologies, structures and optical properties of the catalysts were analyzed by TEM, XRD and UV-vis DRS.The photocatalytic reduction ability was evaluated by the removal of nitrate. After 30 min UV light（365 nm）irradiation, the nitrate conversion rate reached to 88.94%, and the nitrogen selectivity up to 97.11% over 0.5%BiOBr/TiO₂/MIL-125（Ti）. The results indicated the nanocomposite exhibited significant improvement of nitrate removal efficiency than that of BiOBr and MIL-125（Ti）. The reasons for the improvement were discussed in detail.更多还原