ABSTRACT

Porous boron nitride (PBN) as an emerging porous material exhibits unique physico-chemical properties for environmental remediation. However, the practical applications of PBN are very difficult due to its poor regeneration performance. In this work, we loaded α-Fe₂O₃ nanoparticles on PBN to form a kind of composite (HB) with high adsorption capacity, which possessed remarkably enhanced regeneration performance. As expected, HB exhibited excellent synergistic catalytic degradation activity with the assistance of H₂O₂ towards methylene blue (MB) adsorbed on its surface: after 10 cycles, the removal efficiency of 92.8% for HB remained. Further experiments revealed that the α-Fe₂O₃ nanoparticles accelerated the decomposition of H₂O₂ to produce ·O₂ radicals and ·OH radicals, which could degrade the dye adsorbed on their surface directly. Given the high adsorption capacity and excellent recyclability, HB is envisaged to be valuable practically for water purification and meets the requirement of large-scale production.

摘要

多孔氮化硼 (PBN) 作为一种新兴的多孔材料，在环境修复方面表现出独特的理化性质。然而，由于其再生性能差，PBN的实际应用非常困难。在这项工作中，我们将 α-Fe ₂ O ₃纳米粒子负载在 PBN 上形成了一种具有高吸附能力的复合材料 (HB)，其再生性能显着增强。正如预期的那样，HB 在 H ₂ O ₂的帮助下对吸附在其表面上的亚甲蓝 (MB)表现出优异的协同催化降解活性：10 个循环后，HB 的去除效率仍为 92.8%。进一步的实验表明，α-Fe ₂ O ₃纳米粒子加速H ₂ O ₂分解，产生·O ₂自由基和·OH自由基，直接降解吸附在其表面的染料。鉴于高吸附能力和优异的可回收性，HB被认为在水净化方面具有实用价值并满足大规模生产的要求。