TiO_2/Ni_3[Si_2O_5][OH]_2复合光催化材料对盐酸四环素的光降解研究  

Photocatalytic degradation of tetracycline with TiO_2/Ni_3[Si_2O_5][OH]_2 composite photocatalyst

作　　者：孙蕾[1] 马国华[1] SUN Lei MA Guohua(Southwest University of Science and Technology, Mianyang 621002,China)

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621002

出　　处：《功能材料》2017年第3期3133-3138,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51002126);博士基金资助项目(12zx7112)

摘　　要：以Ni_3[Si_2O_5][OH]_2纳米管(NNTs)为载体,利用氟钛酸氨((NH_4)_2TiF_6)与硼酸(H_3BO_3)混合液相沉积法制备TiO_2/NNTs复合纳米管。通过TEM、Raman和UV-Vis等手段对样品的形貌、物相和光吸收性能进行了分析表征,探讨了沉积温度对复合效果的影响。以TiO_2/NNTs复合纳米管作为催化剂对水体中盐酸四环素进行降解研究,探究了沉积温度、水体环境(pH值条件)对催化效果的影响。并通过质谱对催化降解产物进行了初步的推断。结果表明,NNTs表面被TiO_2均匀包覆,包覆的TiO_2为锐钛矿相。制备的TiO_2/NNTs在紫外和可见光区有较强吸收,相对TiO_2光吸收范围红移。当溶液pH值为6.5时降解率最佳;降解产物为小分子物质。Ni3[Si2O5][OH]2nanotubes（NNTs）as the carrier bracket,a new-style composite nanotube photocatalyst was prepared that TiO2 was coating on the surface of NNTs by the simple mean of liquid phase deposition using（NH4）2TiF6and H3BO3 as precursors.The obtained samples were characterized by SEM,TEM,RM and UV-Vis spectroscopy.The effects of deposition temperature on the preparation of samples were discussed.The photocatalytic activity of the prepared TiO2/NNTs was studied by the photocatalytic degradation ability of tetracycline（TC）and explored the factors of TC degradation like composite catalyst preparation conditions（deposition temperature）and the aquatic environment（pH）.The degradation products were analyzed by mass spectrometry.The results show that the surface of NNTs were evenly coated with TiO2 and coating TiO2 was anatase.The prepared TiO2/NNTs can make a high absorption to ultraviolet-visible and the absorption wavelength red shift with respect to TiO2.At the same time,when the pH of solution was 6.5,the degradation rate was the best.The degradation products were small molecules.

关 键 词：二氧化钛 Ni3[Si2O5][OH]2纳米管 四环素 光催化 

分 类 号：O611.4[理学—无机化学] TB321[理学—化学]