Zeolitic Imidazolate Framework-67@Cellulose aerogel for rapid and efficient degradation of organic pollutants

Abstract

Metal-organic frameworks (MOFs) can efficiently degrade stubborn organic pollutants via advanced oxidation process. However, it is essential to find ways to shape MOFs if its promise of practical application is to be realized. Herein, we develop a Zeolitic Imidazolate Framework-67 (ZIF-67)@cellulose aerogel (denoted as ZIF-67@CA) by a facile doping method. The strategy enhances actual macroscopic shape ability and external hierarchical porosity. Cellulose can provide mechanical flexibility to shape MOFs and promote recycle efficiency after water treatment. The novel doping method increases the loading and dispersibility of ZIF-67, which further increases the potential for the degradation of organic pollutants. ZIF-67@CA can take advantage of the accessible surface area and metal catalytic sites of ZIF-67 to activate peroxymonosulfate (PMS) efficiently and promote its degradation of p-nitrophenol (PNP) and tetracycline hydrochloride (TC). The degradation rate of organic pollutants is up to 80% within only 20 ​min. Furthermore, ZIF-67@CA exhibits excellent pH stability and recyclability so that it can be reused in harsh environments. Therefore, the low-cost and environmental-friendly production method can effectively recycle high-performance MOFs and expand its applications in a wider range of fields.