TiO2/MIL-88B（Fe）/聚丙烯复合熔喷非织造材料的制备及其性能

Preparation of TiO2/MIL-88B（Fe）/polypropylene composite melt-blown nonwovens and study on dye degradation properties

为使聚丙烯(PP)熔喷非织造材料功能化,扩大其在水处理方面的应用,以2,4-对苯二甲酸、六水合三氯化铁、纳米氧化钛为原料,PP熔喷非织造材料为基材,首先通过浸渍工艺预处理基底材料,再通过溶剂热法在PP熔喷非织造材料基材上负载金属有机框架材料TiO2/MIL-88B(Fe),制备了TiO2/MIL-88B(Fe)/PP复合熔喷非织造材料。借助红外光谱、X射线衍射及孔径分析对TiO2/MIL-88B(Fe)/PP复合熔喷非织造材料的结构与性能进行了表征。结果表明TiO2/MIL-88B(Fe)成功负载在PP熔喷非织造材料表面。在可见光照射条件下,TiO2/MIL-88B(Fe)/PP复合熔喷非织造材料对甲基蓝、酸性橙7及酸性红73这3种染料的降解率均达到80%以上,其中对甲基蓝的降解率可达86%,对较难降解的罗丹明B的降解率也达到了59%。在重复使用5次后,复合熔喷非织造材料对甲基蓝降解率均在70%以上,性能较稳定。

In order to functionalize polypropylene(PP)melt-blown nonwovens and expand their application on water treatment,TiO2/MIL-88B(Fe)/PP composite melt-blown nonwovens were prepared by use of 2,4-terephthalic acid,ferric chloride hexahydrate and nano-titanium oxide as raw materials and PP melt-blown nonwovens as the substrate.PP melt-blown nonwovens was first pretreated by impregnation process.Then,the metal-organic framework TiO2/MIL-88B(Fe)was fixed on the surface of PP melt-blown nonwovens via solvothermal method.The structure and properties of the TiO2/MIL-88B(Fe)/PP composite melt-blown nonwovens were characterized by Fourier transform infrared spectrometer,X-ray diffraction and aperture analyzer.It is indicated that TiO2/MIL-88B(Fe)was successfully loaded on the surface of PP melt-blown nonwovens substrate.Under visible light irradiation,the degradation rates of the TiO2/MIL-88B(Fe)/PP composite melt-blown nonwovens for methyl blue,acid orange 7,acid red 73 are more than 80%,and especially,its degradation rate for methyl blue could reach 86%,the degradation rate of Rhodamine B also reaches 59%.After 5 cycles of tests,the removal rate of methyl blue by composites is above 70%,the catalytic performance is stable.