BiOBr/TiO2/MIL-125（Ti）光催化还原硝酸盐的研究  

The Study of Photocatalytic Reduction of Nitrate by BiOBr/TiO2/MIL-125（Ti）

作　　者：祁昕 马国强 赵洁 李朝阳 耿直[1] 杨霞[1] Qi Xin;Ma Guoqiang;Zhao Jie;Li Zhaoyang;Geng Zhi;Yang Xia(School of Environment,Northeast Normal University,Changchun,Jilin 130117,China;Shenzhen Aerospace Smart City System Technology Co.,Ltd,Shenzhen,Shenzhen,Guangdong 518057,China)

机构地区：[1]东北师范大学环境学院,吉林长春130117 [2]深圳航天智慧城市系统技术研究院有限公司,广东深圳518057

出　　处：《伊犁师范学院学报（自然科学版）》2019年第1期33-39,共7页Journal of Yili Normal University：Natural Science Edition

基　　金：中央高校基本科研专项资金(2412018ZD016);吉林省教育厅项目(JJKH20180021KJ)

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365nm紫外光下照射30min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.BiOBr/TiO2/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.

关 键 词：BiOBr/TiO2/MIL-125(Ti) 光催化 硝酸盐 氮气 

分 类 号：X505[环境科学与工程—环境工程]