Fe3O4 @ SPC类芬顿氧化降解苯酚 |
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引用本文: | 任凯文,马建超.Fe3O4 @ SPC类芬顿氧化降解苯酚[J].精细化工,2022,39(6). |
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作者姓名: | 任凯文 马建超 |
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作者单位: | 太原理工大学,太原理工大学 |
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基金项目: | 国家高技术研究发展计划(863计划) |
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摘 要: | 以钙基蒙脱石(Ca-MMT)为原料,采用一步层间模板法制备了四氧化三铁@硅柱撑蒙脱石催化材料(Fe3O4@SPC),通过XRD、FTIR、BET、SEM对材料的形貌、结构进行表征显示,Fe3O4@SPC具有d001=3.30 nm的晶面间距和4.47 nm的介孔,Fe3O4颗粒主要分散在SPC的外表面。以苯酚为降解目标污染物,考察了Fe3O4@SPC的催化活性和稳定性。结果表明,当苯酚质量浓度为100 mg/L,pH值为2.5,催化剂质量浓度为0.5 g/L,H2O2投加量为0.2 mL,反应时间为120 min时,苯酚的去除率为100%;催化剂经过5次循环使用后,苯酚的降解率依然保持在90%以上。通过GC-MS分析苯酚降解生成的中间体,结合叔丁醇淬灭实验,发现?OH氧化在非均相类芬顿催化氧化降解苯酚体系中起主导作用,推测了苯酚可能的降解路径。
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关 键 词: | 钙基蒙脱石 Fe3O4 类芬顿氧化 苯酚 降解机理 |
收稿时间: | 2021/12/13 0:00:00 |
修稿时间: | 2022/3/9 0:00:00 |
Fenton-like oxidative degradation of phenol over Fe3O4 @ SPC |
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Affiliation: | Taiyuan University Of Technology,Taiyuan University of Technology |
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Abstract: | The ferroferric oxide @ silicon pillared montmorillonite catalytic material (Fe3O4@SPC) was prepared by a one-step interlayer template method using calcium-based montmorillonite (Ca-MMT).The morphology and structure of the material were characterized by XRD, FTIR, BET and SEM. The results showed that Fe3O4@SPC has d001=3.30 nm large crystal plane spacing and 4.47 nm mesoporous aperture, and most of Fe3O4 particles were dispersed on the surface of SPC. The catalytic activity and stability of Fe3O4@SPC were evaluate with phenol. The optimized conditions were as follows: the mass concentration of phenol is 100 mg/L, the pH value is 3.5, the mass concentration of catalyst is 0.5 g/L, H2O2 dosage of 0.2 mL and the reaction time is 120 min, the degradation rate of phenol is 100%. The removal rate of phenol remained above 90% after the catalyst was recycled for 5 times. Tert-butyl alcohol quenching experiment, revealed that ?OH oxidation played a key role in heterogeneous Fenton-like catalytic oxidation degradation of phenol. And the possible degradation path of phenol was speculated by the intermediates of phenol degradation with GC-MS. |
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Keywords: | Calcium montmorillonite Fe3O4 Fenton-like oxidation Phenol degradation mechanism |
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