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, π-π interaction, Van de Waals force and electrostatic interaction.

各种抗生素引起的水环境污染引起了广泛关注。寻找有效的吸附剂以去除有毒化合物非常重要。在此，通过简便的方法将Ni（II）锚定在多孔氮化硼（BN）的表面上，以增强对四环素（TC）的吸附性能。多孔BN与Ni（II）之间的相互作用被证明是BO-Ni键。值得注意的是，Ni（II）改性的多孔BN对TC的去除率高达99.769％，远远超过了原始的多孔BN（70.853％）和大多数其他报道的吸附材料。根据Langmuir模型计算得出的最大吸附容量为429.582 mg g ^-1，证实镍（II）改性多孔BN在去除TC方面具有卓越的性能。此外，TC在Ni（II）修饰的多孔BN上的吸附遵循伪二级动力学，平衡数据与Freundlich等温线吻合得很好，表明化学吸附和多层吸附是主要的。最后，DFT计算结果进一步表明，TC在Ni（II）改性多孔BN上的有效吸附可归因于阳离子桥相互作用，π-π相互作用，范德华力和静电相互作用。