铁基金属–有机框架材料/活性碳纤维复合材料的制备及其对染料的脱色

为提高铁基金属–有机框架材料MOF(Fe)的重复使用性能,以均苯三甲酸、硫酸亚铁、活性碳纤维(ACF)为原料,采用室温原位生长法制备了铁基金属–有机框架材料/活性碳纤维复合材料MOF(Fe)/ACF。借助傅里叶红外光谱仪、扫描电子显微镜、能谱仪、X射线衍射仪对复合材料的结构、形貌、元素组成等进行了表征;测试了复合材料在不同条件下对50 mg/L活性黑KN–B染液的脱色效果,并探讨了光催化降解染料的机制。结果表明:黑暗条件下,分别在不加双氧水和加入0.12 mL/L双氧水时反应60 min后,MOF(Fe)/ACF对活性黑KN–B染液的脱色率分别为64.7％和80.2％;在1 000 W氙灯光照下,加入0.12 mL/L双氧水反应60 min后,MOF(Fe)/ACF 对活性黑KN–B染液的脱色率达95.7％,比ACF高52.2％;重复使用5次,MOF(Fe)/ACF对活性黑KN–B染液的脱色率仍可达86.0％。

Preparation and decolorization of iron-based metal\|organic framework/activated carbon fiber composites

In order to improve the reusability of iron-based metal\|organic framework (MOF(Fe)), MOF(Fe)/activated carbon fiber composites (MOF(Fe)/ACF) were prepared by in-situ growth at room temperature using pyromellitic acid, ferrous sulfate and activated carbon fiber (ACF). The structure, morphology and elemental composition of the composites were characterized by Fourier transform infrared spectrometer, scanning electron microscopy, energy dispersive spectroscopy and X-ray diffraction. The decolorization of composites on 50 mg/L Reactive Black KN–B was tested under different conditions, and the mechanism of photocatalytic degradation of dye was discussed. The results showed that the decolorization ratio of composite material on Reactive Black KN–B was 64.7％ after 60 min reaction without hydrogen peroxide and 80.2％ with 0.12 mL/L hydrogen peroxide. Under the condition of 1 000 W xenon lamp illumination, adding 0.12 mL/L hydrogen peroxide and reacting for 60 min, the decolorization ratio of MOF(Fe)/ACF for Reactive Black KN–B became 95.7％, 52.2％ higher than that of the ACF. After five times reuse, the decolorization ratio of MOF(Fe)/ACF could still reach 86.0％.