Abstract
Engineering structure defects in boron nitride for enhancing adsorption performance is imperative for the rational design of a high-efficient adsorbent. Herein, boron nitride nanosheets (BNNSs) with nitrogen defects were in situ synthesized via a one-step alkali-assisted strategy. N-defects in BNNSs framework tune the morphological and electronic structure of the nanomaterial, strengthening the interaction between sorbents and pollutants, and resulting in the promotion of antibiotics removal. The enhanced adsorptive strength between N vacancy defect and tetracycline (TC) were further confirmed by density functional theory (DFT) calculations. The sorption of TC was well fitted to the pseudo-second order kinetics model and Freundlich isotherm equation. In addition, a multilayer adsorption mechanism on heterogeneous surfaces of defective BNNSs was proposed, indicating that the adsorption is mainly dominated by π-π stacking interaction.
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