Ni-doped MIL-53(Fe) nanoparticles for optimized doxycycline removal by using response surface methodology from aqueous solution
Ni-doped MIL-53(Fe) nanoparticles for optimized doxycycline removal by using response surface methodology from aqueous solution
复制标题
Ni 掺杂的 MIL-53(Fe) 纳米粒子通过使用响应面法从水溶液中优化多西环素去除
DOI：
10.1016/j.chemosphere.2019.05.184
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发表时间：
2019
期刊：
影响因子：
8.8
通讯作者：
Qin Lei
中科院分区：
文献类型：
--
作者：
Xiong Weiping;Zeng Zhuotong;Li Xin;Zeng Guangming;Xiao Rong;Yang Zhaohui;Xu Haiyin;Chen Hongbo;Cao Jiao;Zhou Chengyun;Qin Lei
本研究提出了一种简单的一锅溶剂热法制备ni掺杂MIL-53（Fe）纳米颗粒作为强力霉素去除的高性能吸附剂。采用扫描电镜、透射电镜、x射线衍射、x射线光电子能谱、傅里叶变换红外光谱和热重分析对样品的形貌和结构进行了表征。结果表明，通过简单的反应将镍成功掺杂到MIL-53（Fe）中，得到的ni掺杂MIL-53（Fe）纳米颗粒具有优异的稳定性。通过对多西环素（DOX）在水溶液中的去除效率来评价其吸附活性。根据响应面二次模型（RSM），最佳吸附条件为DOX浓度100 mg/L、温度35 ℃、离子强度5 g/L、pH 7。合成的ni掺杂MIL-53（Fe）纳米颗粒的吸附量为397.22 mg/g，优于其他吸附剂。吸附机理研究表明，吸附过程以静电和π-π堆积相互作用为主。ni掺杂MIL-53（Fe）纳米颗粒具有较好的吸附活性，在水中去除DOX方面具有很大的潜力。
This study proposes a facile one-pot solvothermal method to prepare Ni-doped MIL-53(Fe) nanoparticles as high-performance adsorbents for doxycycline removal. The morphology and structure of the samples were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, fourier transform infrared spectrum and thermogravimetric analysis. These results reveal that nickel was doped into MIL-53(Fe) successfully via a facile reaction, and the obtained Ni-doped MIL-53(Fe) nanoparticles showed excellent stability. The adsorption activities were evaluated in terms of the removal efficiencies of doxycycline (DOX) in aqueous solution. According to the response surface quadratic model (RSM), the optimal adsorption conditions were concentration of DOX 100 mg/L, temperature 35 °C, ionic strength 5 g/L and pH 7. The as-synthesized Ni-doped MIL-53(Fe) nanoparticles showed better adsorption capacity of 397.22 mg/g compared with other adsorbents. The investigation of adsorption mechanism demonstrated that the adsorption process was dominated by electrostatic and π-π stacking interactions. The Ni-doped MIL-53(Fe) nanoparticles with improved adsorption activities would have a great potential in DOX removal from aqueous environment.