以腈纶(PAN)为基材,七水合硫酸亚铁(FeSO₄·7H₂O)为金属盐,均苯三甲酸(H₃BTC)和对苯二甲酸(H₂BDC)为双配体,采用原位生长法制备了Fe-(H₃BTC/H₂BDC)/PAN(简称BBP)复合材料。以活性黑KN-B为脱色对象,探讨了配体比例对BBP复合材料的光催化性能的影响。通过扫描电镜(SEM)、X射线衍射(XRD)、BET比表面积(S_BET)表征手段分析了复合材料的外观形貌、物相结构和孔结构。探讨了印染废水中无机盐及表面活性剂组分对BBP复合材料光催化降解染料性能的影响,研究了复合材料的重复使用性能和光催化脱色机理。结果表明:配体H₃BTC和H₂BDC比例为1∶1时制备的BBP复合材料的脱色效果最好。在50mg/L活性黑KN-B染液中加入0.08mL/L 30% H₂O₂,在1000W氙灯光照下处理30min,5g/L复合材料对染料的脱色率的脱色率达到96%,重复使用5次后的脱色率为83%。加入无机盐和表面活性剂对染料降解均有抑制作用,抑制作用由强到弱依次为阴离子表面活性剂十二烷基硫酸钠(SDS)、非离子表面活性剂平平加O、Na₂SO₄。在光催化降解染料过程中,h⁺起主要作用,·O^-₂、·OH起到辅助作用。

Fe-(H₃BTC/H₂BDC)/PAN (BBP) composites were prepared by in-situ growth method using polyacrylic fiber (PAN) as the substrate,ferrous sulfate heptahydrate (FeSO₄·7H₂O) as the metal salt,and trimesic acid (H₃BTC) and terephthalic acid (H₂BDC) as the dual ligands.The effect of ligand ratio on the photocatalytic performance of BBP composites was investigated using reactive black KN-B as the decolorization object.The appearance morphology,phase structure,and pore structure of the composites were analyzed by SEM,XRD,and S_BET characterization methods.The influence of inorganic salts and surfactant components in printing and dyeing wastewater on the photocatalytic degradation performance of BBP composites was explored.The reusability and photocatalytic decolorization mechanism of the composites were studied.The results showed that the decolorization effect of BBP composite prepared with a ligand H₃BTC and H₂BDC ratio of 1∶1 was the best.By adding 0.08mL/L of 30% H₂O₂ to 50mg/L of reactive black KN-B dye solution and treating under 1000W xenon light for 30min,the decolorization rate of the 5g/L composite for the dye reached 96%,and the decolorization rate was 83% after repeated use for 5 times.The addition of inorganic salts and surfactants had inhibitory effects on dye degradation.The inhibitory effects,from strong to weak,were:anionic surfactant SDS,non-ionic surfactant Peregal O,and Na₂SO₄.In the photocatalytic degradation of dyes,h⁺ played a major role,while ·O^-₂ and ·OH played auxiliary roles.