Nickel (II) modified porous boron nitride: An effective adsorbent for tetracycline removal from aqueous solution
Nickel (II) modified porous boron nitride: An effective adsorbent for tetracycline removal from aqueous solution
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镍 (II) 改性多孔氮化硼：一种有效去除水溶液中四环素的吸附剂
DOI：
10.1016/j.cej.2020.124985
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发表时间：
2020-08-15
影响因子：
15.1
通讯作者：
Tang, Chengchun
中科院分区：
文献类型：
--
作者：
Song, Qianqian;Liang, Jianli;Tang, Chengchun
各种抗生素对水环境的污染已引起广泛关注。寻找有效的吸附剂去除有毒化合物是非常重要的。在此，镍（II）锚定在多孔氮化硼（BN）的表面，通过一种简单的方式，以提高四环素（TC）的吸附性能。多孔BN与Ni（II）之间的相互作用为B-O-Ni键。值得注意的是，Ni（II）改性的多孔BN对TC显示出高达99.769%的优异去除率，远远超过原始多孔BN（70.853%）和大多数其他报道的吸附材料。由Langmuir模型计算得到的最大吸附容量为429.582 mg g（-1），表明Ni（II）改性多孔BN对TC具有良好的吸附性能。Ni（II）改性多孔BN对TC的吸附符合准二级动力学，吸附等温线符合Freundlich方程，以化学吸附和多层吸附为主.最后，DFT计算结果进一步证明了TC在Ni（II）改性多孔BN上的有效吸附是由阳离子桥相互作用、p-p相互作用、货车de Waals力和静电相互作用共同作用的结果。
Contamination of aqueous environment caused by various antibiotics has attracted wide attention. It is important to find effective adsorbents for the removal of toxic compounds. Herein, Ni (II) was anchored at the surface of porous boron nitride (BN) by a facile way to enhance the adsorption performance for tetracycline (TC). The interaction between porous BN and Ni (II) was proved to be B-O-Ni bond. It is noteworthy that Ni (II) modified porous BN shows excellent removal percentage up to 99.769% for TC which far exceeds the pristine porous BN (70.853%) and most other reported adsorption materials. The maximum adsorption capacity calculated from the Langmuir model is 429.582 mg g(-1), confirming that Ni (II) modified porous BN has a remarkable performance for removing TC. In addition, the adsorption of TC onto Ni (II) modified porous BN followed pseudo-second-order kinetics and the equilibrium data fitted well with the Freundlich isotherm, revealing that chemisorption and multilayer adsorption was dominated. Finally, the results of DFT calculations further demonstrated that the effective adsorption of TC on Ni (II) modified porous BN could be ascribed to cation bridge interaction, p-p interaction, Van de Waals force and electrostatic interaction.