【摘要】 为优化聚丙烯腈基光催化膜在可见光下的光催化性能,以羧基化二氧化钛（TiO₂）和咪唑沸石骨架（ZIF-8）为原料,成功制备了一种新型异质结光催化剂TiO₂@ZIF-8,并以热诱导相分离法（TIPS）制备的聚丙烯腈-丙烯酸甲酯（P（AN-MA））膜为基膜,经碱性水解和氢键自组装得到TiO₂@ZIF-8-HP（AN-MA）光催化膜,并采用XRD、红外光谱仪、扫描电镜等方法对复合膜的光催化性能进行分析。结果表明:成功制备的TiO₂@ZIF-8在可见光波段表现出了优异的吸光优势,在氢键的作用下,以氢键自组装法将TiO₂@ZIF-8锚定在P（ANMA）基膜的表面;与TiO₂@HP（AN-MA）膜相比,TiO₂@ZIF-8-HP（AN-MA）膜对罗丹明B溶液的吸附能力从7.5%提高到19.1%,可见光下光催化膜的降解效率从61.2%提高到99.2%;TiO₂@HP（AN-MA）膜也具有良好的可循环性,经过4个循环的测试,仍能保持90%以上的降解罗丹明B的效率。更多还原

【Abstract】 In order to optimize the photocatalytic performance of the polyacrylonitrile-based photocatalytic membrane under visible light, a novel heterojunction photocatalyst（TiO₂@ZIF-8） was successfully prepared using carboxylated titanium dioxide（TiO₂） and zeolite imidazole skeleton（ZIF-8） as raw materials. Poly（acrylonitrile-co-methyl acrylate）（P（AN-MA）） membrane formed via the thermally induced phase separation method was used as the matrix, and TiO₂@ZIF-8-HP（AN-MA） photocatalytic membrane was obtained after hydrolysis and hydrogen bond self-assembly. The photocatalytic performance of the composite membranes were analyzed by XRD, FTIR and SEM. The results show that TiO₂@ZIF-8 was successfully prepared and exhibited excellent light absorption advantages in the visible band. TiO₂@ZIF-8 particles were anchored to the surface of P（AN-MA） based membrane with the assistance of hydrogen bonding. Compared with TiO₂@HP（AN-MA） membrane, the adsorption capacity of TiO₂@ZIF-8-HP（AN-MA） membrane to Rhodamine B solution increased from 7.5% to 19.1%, while the photocatalytic degradation efficiency increased from 61.2% to 99.2% under the visible light. The TiO₂@HP（AN-MA） membrane also showed excellent cyclability, which still maintains more than 90% of the degradation efficiency to Rhodamine B after 4 cycles of testing.更多还原