| 核壳结构Fe3O4@C粒子在UV-Fenton氧化去除VOCs过程中的吸附-催化作用 |
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| 引用本文： | 陈海英,刘杰民,袁司夷,裴一朴,赵鹏,张艳,颜鲁春,吴传东,高小雅. 核壳结构Fe3O4@C粒子在UV-Fenton氧化去除VOCs过程中的吸附-催化作用[J]. 工程科学学报, 2017, 39(8): 1166-1173. DOI: 10.13374/j.issn2095-9389.2017.08.005 |
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| 作者姓名： | 陈海英 刘杰民 袁司夷 裴一朴 赵鹏 张艳 颜鲁春 吴传东 高小雅 |
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| 作者单位： | 北京科技大学化学与生物工程学院, 北京 100083;青海大学化工学院, 西宁 810016;北京科技大学化学与生物工程学院,北京,100083;中国建筑材料科学研究总院,北京,100024;北京劳动保护科学研究所,北京,100054;北京建筑大学理学院,北京,100044;北京科技大学材料科学与工程学院,北京,100083 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项资助项目(2015ZX07205003)国家自然科学基金资助项目(21576023,21407008)国家重点研发计划资助项目(2016YFE0115500,2016YFC0700603)中央高校基本科研业务费资助项目(FRF-TP-15-080A1) |
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| 摘 要： | 采用一步水热法制备核壳结构Fe3O4@C微米粒子,通过比表面积及孔径分析仪、X射线衍射仪、透射电子显微镜、傅里叶变换红外光谱仪等对粒子结构和形貌进行表征,并研究了粒子作为非均相催化剂在UV-Fenton氧化去除挥发性有机物(VOCs)中的作用机制.结果表明,核壳结构Fe3O4@C粒子由于包覆了孔隙状碳层而具有较强的吸附能力,可显著增加VOCs气体分子与Fenton试剂的接触几率,有助于提高VOCs的去除效率.通过计算反应速率常数及协同因子,证实在核壳结构Fe3O4@C粒子去除VOCs的过程中存在吸附-催化氧化协同作用.
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| 关 键 词： | 核壳结构粒子 UV-Fenton氧化法 挥发性有机物 吸附-催化作用 |
| 收稿时间： | 2017-01-05 |
Fabrication of Fe3O4@C core-shell particles and its application in UV-Fenton oxidize removal of VOCs |
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| Abstract: | The solvothermal method was used to prepare Fe3O4@C core-shell microspheres. The structure and morphology of the nanocomposite powders were characterized by X-ray diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy, and then the particles were used as heterogeneous catalysts in the UV-Fenton removal of VOCs in gas. The results show that the Fe3O4@C core-shell microspheres have a strong adsorption capacity for VOCs due to the outer layer of Fe3O4 being coated with a carbon layer of uniform thickness and pore structure. For sparingly soluble organic gases such as octane, the adsorption of these particles could increase the total concentration of VOCs in the liquid phase. Therefore, the opportunity for the Fenton reagent to be in contact with the VOCs gas increases, causing a significant improvement in the gas removal efficiency. Moreover, the cooperation factor β was introduced to evaluate the synergistic effects in the integrated process of the adsorption-catalytic oxidation by the core-shell structure particles. |
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