Preparation of ZIF-8/natural Plant Fiber Composites via Biomimetic Mineralization for Highly Efficient Removal of Formaldehyde

Novel composites containing zeolitic imidazolate framework-8 (ZIF-8) nanocrystals and natural plant fibers (Juncus effusus (JE) fibers) are successfully synthesized. ZIF-8 nanocrystals are coated onto hydrophilic JE fibers (H-JE fibers) via biomimetic mineralization after only several seconds at room temperature (25 degrees C). The ZIF-8/H-JE fiber composite (stirring) and ZIF-8-BSA/H-JE fiber composite (biomimetic mineralization) composite materials have excellent formaldehyde (HCHO) removal properties. ZIF-8-BSA/H-JE fiber composites, in particular, are highly efficient HCHO adsorbents. Up to 99.79% HCHO removal at a high concentration (100 mg/m(3)) can be achieved within 90 min, and 100% removal can be achieved at a low concentration (10 mg/m(3)) within 17 min. This study provides an effective strategy for developing natural-plant-fiber-based composite materials for environmental protection.