College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi'an, 710021, China.
College of Bioresources Chemical and Materials Engineering, Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, National Demonstration Center for Experimental Light Chemistry Engineering Education, Shaanxi University of Science and Technology, Xi'an, 710021, China.
Carbohydr Polym. 2019 Oct 15;222:115042. doi: 10.1016/j.carbpol.2019.115042. Epub 2019 Jul 2.
In this work, biodegradable cellulose-based biosorbents (MOFs/OCBs) with dual function of dye removal and microbial inactivation were fabricated by in situ anchoring metal-organic frameworks (MOFs) on the TEMPO oxidized corncobs (OCBs). Results showed that delignification and oxidation can develop the OCBs with more cellulose content, carboxyl groups and specific surface area, thus facilitating the deposition of MOFs. The porous and carbohydrate-rich OCBs can serve as supports and stabilizers for MOFs, allowing for enhanced stability and recyclability of MOFs powders. The MOFs, namely HKUST-1 and ZIF-8, can endow the OCBs multiple functions of good adsorption capacity to methyl orange (from 8% of OCBs to 55% of HKUST-1/OCBs and 84% of ZIF-8/OCBs) and excellent antibacterial activity (from 0 of OCBs to 90.2% of HKUST-1/OCBs and 44.8% of ZIF-8/OCBs). Such a concept may offer a new pathway for preparing economical and efficient biosorbents for environmental remedy purposes.
在这项工作中，通过在 TEMPO 氧化玉米芯（OCBs）上原位锚定金属有机骨架（MOFs），制备了具有双重功能的可生物降解纤维素基生物吸附剂（MOFs/OCBs），用于去除染料和微生物失活。结果表明，脱木质素和氧化可以使 OCBs 具有更高的纤维素含量、羧基和比表面积，从而有利于 MOFs 的沉积。多孔且富含碳水化合物的 OCBs 可以作为 MOFs 的载体和稳定剂，从而提高 MOFs 粉末的稳定性和可回收性。MOFs，即 HKUST-1 和 ZIF-8，赋予 OCBs 多种功能，包括对甲基橙的良好吸附能力（从 OCBs 的 8%到 HKUST-1/OCBs 的 55%和 ZIF-8/OCBs 的 84%）和优异的抗菌活性（从 OCBs 的 0 到 HKUST-1/OCBs 的 90.2%和 ZIF-8/OCBs 的 44.8%）。这种概念可能为制备用于环境修复目的的经济高效的生物吸附剂提供了一条新途径。
