facile and efficient self-template synthesis of core-coronal-shell zno@zif-8 nanohybrid using ascorbic acid and its application for arsenic removal

In the present contribution, a facile and efficient protocol for synthesis a nanohybrid structure of core-coronal-shell zno@zif-8 using ascorbic acid (zno@aa/zif-8) as a new adsorbent for arsenic removal from water has been represented. for this purpose, the zno nanospheres were synthesized by a green and simple method followed by coating with ascorbic acid (aa) to modify their surface to achieve better growth of zif-8 on the surface of zno. after that, the core-coronal-shell zno@zif-8 nanohybrid obtained via in situ zif-8 formation using the dispersion of zno (as a core) in an ethanol solution only including 2-methylimidazole under moderate conditions. here, zno is utilized as a template (core) as well as the metal node for zif-8 synthesis. the as-synthesized zno and zno@aa/zif-8 structures were characterized by different techniques such as xrd, ft-ir, tga and, sem-eds. the analyses data confirmed the benefit of the method for the preparation of this new nanohybrid. the nanostructured zno@aa/zif-8 exhibited high efficiency in the removal of arsenic from water. the obtained results confirmed that core-coronal-shell metal oxide@mof nanohybrid could be introduced asefficient candidates for heavy metalsremovalfor practical applications.