HKUST-1 modified ultrastability cellulose/chitosan composite aerogel for highly efficient removal of methylene blue. (1st March 2021) - Liu, Qun
Graphical abstract: Highlights: Novel ultra-stable chitosan/cellulose aerogel was prepared by covalently crosslinked. The composite aerogel could keep fine morphology and structure in extreme conditions. Components of aerogel can improve its stability and metal chelating ability. Surface area of composite aerogel is increasement due to massive loading of HKUST-1. The adsorption capacity of HKUST-/CCSA to MB reaches to 526.3 mg g −1 . Abstract: A novel composite HKUST-1/cellulose/chitosan aerogel (HKUST-1/CCSA) as an efficient adsorbent with hierarchical pores was prepared through a facile in situ growth way combining covalent cross-linking, vacuum freeze-drying, and solvothermal methods. By incorporating with cellulose (CE), covalently cross-linked cellulose (CE)/chitosan (CS) composite aerogel exhibits good stability, maintaining fine morphology and structures in acidic solutions under solvothermal conditions. Meantime, a high content of CS is beneficial to enhancing the growth of HKUST-1. Finally, the mass loading ratio of HKUST-1 is as high as 42.54 % in HKUST-1/CCSA. The BET specific surface area of HKUST-1/CCSA reaches 457.75 m 2 g −1, which is much larger than that of CCSA (9.74 m 2 g −1 ). HKUST-1/CCSA was applied to remove methylene blue with high adsorption capacity (526.3 mg g −1 ) and good recycling capability. This strategy can provide an effective and facile pathway to prepare ultra-stable polysaccharide-based composite aerogel with high specific surface area and hierarchical pores, branching out more applications in pollutant treatment fields.