| Mo掺杂FeS2非均相Fenton催化剂的制备及催化性能研究 |
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| 引用本文： | 杨静文,方小峰,杨波.Mo掺杂FeS2非均相Fenton催化剂的制备及催化性能研究[J].环境科学研究,2023,36(5):965-974. |
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| 作者姓名： | 杨静文 方小峰 杨波 |
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| 作者单位： | 东华大学环境科学与工程学院，上海 201620 |
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| 基金项目： | 国家重点研发计划项目(No.2019YFC0408503)；上海市“科技创新行动计划”扬帆计划项目(No.20YF1400100)；中央高校基本科研业务费专项资金项目(No.2232020D-54) |
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| 摘 要： | 为提高FeS2活化H2O2降解有机物的性能，本研究通过引入多价金属钼(Mo)制备得到Mo掺杂的FeS2催化剂(FeS2@Mo)，并用于催化降解水中双酚A (BPA).通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、X射线衍射(XRD)对样品形貌和结构组成等进行表征.研究了H2O2浓度、FeS2@Mo投加量、初始pH等条件对BPA降解效果的影响.结果表明：(1)Mo掺杂的FeS2呈现花瓣形球体，尺寸500～1 000 nm.(2)在条件为5 mmol/L H2O2、100 mg/L FeS2@Mo、pH=3.5时降解效果最优，且在该条件下反应10 min时BPA的降解率可达99.1%.(3)淬灭试验和电子顺磁共振(EPR)试验的结果表明，该体系中的活性物种包括羟基自由基(·OH)、单线态氧(1...
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| 关 键 词： | 水处理 非均相Fenton催化 双酚A Mo掺杂 FeS2 |
| 收稿时间： | 2022-09-04 |
Preparation and Study of Catalytic Properties of Mo Doped FeS2 Heterogeneous Fenton Catalysts |
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| Affiliation: | College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China |
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| Abstract: | In order to improve the performance of FeS2 to activate H2O2 to degrade organic pollutant, polyvalent molybdenum (Mo) was introduced into FeS2 to obtain Mo-doped FeS2 (FeS2@Mo) catalyst. It was used to degrade bisphenol A (BPA) in water. The morphology and structure of the FeS2@Mo samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). The effects of H2O2 concentration, FeS2@Mo dosage, and initial pH on BPA degradation were studied. The results show that: (1) The Mo-doped FeS2 is in petal-shaped spheres with a size of 500-1000 nm. (2) The degradation effect is the best under the conditions of 5 mmol/L H2O2, 100 mg/L FeS2@Mo, and pH=3.5, and the degradation rate of BPA can reach 99.1% after 10 min reaction. (3) The results of quenching experiments and electron paramagnetic resonance (EPR) experiment showed that the active species in the system were hydroxyl radical (·OH), singlet oxygen (1O2) and superoxide radical (·O2?), and ·OH and 1O2 were dominance. (4) The doping of Mo helps to increase the ratio of Fe2+ and improve the catalytic efficiency of Fenton. The research shows that the doping of Mo successfully improves the catalytic performance of FeS2 and enhances the degradation efficiency of BPA in water, which has potential application prospects. |
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