一种新型负载氧化铁（FeO）的碳化钛（TiC）MXene 用于从水溶液中高效去除四环素。
A novel iron oxide (FeO)-laden titanium carbide (TiC) MXene stacks for the efficient removal of tetracycline from aqueous solution.
机构信息
School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming, 650500, China.
School of Chemistry and Environment, Yunnan Minzu University, Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, Kunming, 650500, China.
出版信息
Chemosphere. 2024 Sep;364:143210. doi: 10.1016/j.chemosphere.2024.143210. Epub 2024 Aug 28.
FeO has the advantages of unique magnetic stability and low biological toxicity, which can improve pollutants separation efficiency. MXenes are two-dimensional materials and easy surface functionalization that can provide suitable carriers for FeO. In this work, we synthesized magnetic MXene composites by a one-pot method that relies on doping FeO particles onto TiC MXene nanosheets by heat treatment. The FeO/TiC MXene was analyzed by SEM, XRD, FTIR and XPS techniques, which showed that the material has good tetracycline (TC) removal properties and magnetic separation ability. The results showed that the adsorption capacity of it was 46.42 mg g, and the removal efficiency of 0.06 g adsorbent for 50 mL of 30 mg L TC could reach 92.1% in a wide pH range of 4-10, when the adsorption temperature was 25 °C, and the adsorption time was 3 h. The adsorption data were consistent with Langmuir and the proposed second-order kinetic model, and the thermodynamic experiments confirmed that the adsorption of TC was a monolayer physicochemical adsorption coexisting heat-trapping process (ΔH = 15.72 kJ mol). In addition, the adsorption of TC by FeO/TiC MXene was attributed to the synergistic effect of electrostatic attraction, hydrogen bonding and π-π packing. In conclusion, the saturation magnetization of FeO/TiC MXene is 27.3 emu/g and it can not only be separated from water using its strong magnetic properties to avoid secondary contamination, but also can be used as a promising material to effectively remove antibiotics from aqueous media.
FeO 具有独特的磁稳定性和低生物毒性的优点，可以提高污染物的分离效率。MXenes 是二维材料，易于表面功能化，可以为 FeO 提供合适的载体。在这项工作中，我们通过一锅法合成了磁性 MXene 复合材料，该方法依赖于热处理将 FeO 颗粒掺杂到 TiC MXene 纳米片上。通过 SEM、XRD、FTIR 和 XPS 技术对 FeO/TiC MXene 进行了分析，结果表明该材料具有良好的四环素（TC）去除性能和磁分离能力。结果表明，其吸附容量为 46.42mg/g，在 pH 值为 4-10 的较宽范围内，当吸附温度为 25°C，吸附时间为 3h 时，0.06g 吸附剂对 50mL 30mg/L TC 的去除率可达 92.1%。吸附数据符合 Langmuir 和拟二级动力学模型，热力学实验证实 TC 的吸附是单层物理化学吸附共存的吸热过程（ΔH=15.72kJ/mol）。此外，TC 在 FeO/TiC MXene 上的吸附归因于静电吸引、氢键和π-π堆积的协同作用。总之，FeO/TiC MXene 的饱和磁化强度为 27.3emu/g，不仅可以利用其强磁性从水中分离出来，避免二次污染，而且还可以作为一种有前途的材料，有效地从水介质中去除抗生素。
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