ZIF-67-derived Co@N-PC anchored on tracheid skeleton from sawdust with micro/nano composite structures for boosted methylene blue degradation
ZIF-67-derived Co@N-PC anchored on tracheid skeleton from sawdust with micro/nano composite structures for boosted methylene blue degradation
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ZIF-67衍生的Co@N-PC锚定在锯末管胞骨架上，具有微/纳米复合结构，可促进亚甲基蓝降解
DOI：
10.1016/j.seppur.2021.119489
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发表时间：
2022
影响因子：
8.6
通讯作者：
Yongfeng Luo
中科院分区：
文献类型：
--
作者：
Ziheng Wang;Xiaoman Wang;Luchi Wang;Yuan Wei;Zhao Zhao;Kun Du;Daoyong Chen;Xianjun Li;Cui Zhou;Gonggang Liu;Yongfeng Luo
金属有机框架（MOF）衍生的碳基纳米催化剂由于高孔隙率、丰富的结构多样性/可调节性和可控的化学成分而广泛应用于环境领域。然而，为了解决纳米颗粒的聚集和回收问题，合适的载体是非常必要的。在这里，成本低廉、资源丰富且具有特殊内腔结构的废木屑生物质已被用作Co-MOFs（ZIF-67）的可扩展载体。由于Co离子与木材丰富的含氧官能团的配位，ZIF-67可以在具有管胞骨架的杨木锯末表面原位均匀生长，并通过进一步碳化成功制备出具有微纳米多孔结构的磁性催化剂（Co@N-PC）。通过活化过氧单硫酸钾（PMS）去除亚甲基蓝（MB）来研究Co@N-PC的催化能力。结果表明，Co@N-PC 对 MB 的降解效率可在 30 分钟内达到 100%，表现出优异的催化性能。 MB降解能力的增强主要得益于其独特的微纳米多孔结构，有利于降解过程中有效的物质转移和电子转移。同时提出了一种可能的催化机制。此外，Co@N-PC可以很容易地通过外部磁铁从溶液中分离和重复使用，并且表现出良好的稳定性。这项工作不仅提供了一种简单有效的策略来设计大规模且商业上可行的生物质/MOF 衍生催化剂用于水处理，而且还为废弃生物质的高价值利用提供了一个不错的替代方案。
Metal-organic frameworks (MOFs) derived carbon based nanocatalysts have been widely used in the environmental field due to high porosity, rich structural diversity/adjustability, and controllable chemical compositions. However, a suitable carrier is very necessary for solving the issues of aggregation and recovery of nanoparticles. Here, waste biomass of sawdust with low cost, abundant resource and special lumen structure, has been used as scalable carrier for Co-MOFs (ZIF-67). Due to the coordination of Co ions with abundant oxygen-containing functional groups of wood, ZIF-67 could be uniformly grownin situon the surface of poplar sawdust with tracheid skeleton, and a magnetic catalyst possessing micro-nano porous structure has been successfully prepared by further carbonization (Co@N-PC). The catalytic ability of Co@N-PC was studied by activating potassium peroxomonosulfate (PMS) to remove methylene blue (MB). The results indicate the degradation efficiency on MB of Co@N-PC can reach 100% within 30 min which shows excellent catalytic performance. The boosted MB degradation ability mainly results from its unique micro-nano porous structure facilitating efficient material transfer and electron transfer during degradation process. At the same time, a possible catalytic mechanism was proposed. Moreover, Co@N-PC can be easy to separate and reuse from the solution by an external magnet, and performed decent stability. This work not only provides a simple and effective strategy to design large-scale and commercially viable biomass/MOF derived catalysts for water treatment, but also offers a decent alternative for high value utilization of waste biomass.
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