热压法制备MIL-100(Fe)/ACF复合材料及其对染料的光催化脱色

Preparation of MIL-100(Fe)/ACF composite by hot pressing method and its photocatalytic decolorization of dyes

以七水合硫酸亚铁为金属盐,均苯三甲酸(H3BTC)为配体,活性炭纤维(ACF)为基材,采用热压法制备了MIL-100(Fe)/ACF复合材料。以活性黑KN-R染料为脱色对象,通过正交试验优化了MIL-100(Fe)/ACF复合材料的制备工艺:七水合硫酸亚铁与H3BTC的物质的量之比为1.5∶1、热压温度为150℃、热压时间为40 min。利用SEM、FT-IR、XRD表征手段,证明MIL-100(Fe)成功负载到ACF上。研究了复合材料在不同条件下对染料的脱色性能,结果表明:随着染液中H2O2添加量的增加,脱色率提高,但当H2O2加入量超过0.16 mL/L后,脱色率变化不大。复合材料对不同染料的脱色效果不同,对活性黑KN-B和罗丹明B的脱色率超过96.0%,对活性红3BS的脱色率达到90.0%以上,对活性艳蓝KN-R的脱色率仅为65.6%。重复使用4次后,对活性黑KN-B染液的脱色率为75.4%。

MIL-100(Fe)/ACF composites are prepared by hot pressing method using ferrous sulfate heptahy⁃drate as the metal salt,phthalic acid(H3BTC)as the ligand,and activated carbon fiber(ACF)as the substrate.The optimal preparation process for MIL-100(Fe)/ACF composite is determined through orthogonal experi⁃ments using Reactive Black KN-R as the decolorization object.The molar ratio of ferrous sulfate heptahydrate to H3BTC is 1.5∶1,hot pressed at 150℃for 40 min.The successful loading of MIL-100(Fe)onto ACF is demon⁃strated by characterization methods such as SEM,FT-IR,XRD.The decolorization performance of MIL-100(Fe)/ACF composite on dyes under different conditions is studied.The results show that with the increase of H2O2 in the dye solution,the decolorization rate increases.However,when the amount of H2O2 exceeds 0.16 mL/L,the difference in decolorization rate is small.The MIL-100(Fe)/ACF composite has different decolor⁃ization effects on different dyes.The decolorization rate is over 96.0%for Reactive Black KN-B and Rhodamine B,over 90.0%for Reactive Red 3BS,and only 65.6%for Reactive Brilliant Blue KN-R.After 4 repeated use,the decolorization rate is 75.4%for Reactive Black KN-B.