▎ 摘　　要

NOVELTY - Nanocomposite comprises: (a) copper-based metal-organic-framework; (b) aminoclay; and (c) graphene oxide. USE - The nanocomposite is useful for atmospheric water harvesting. ADVANTAGE - The nanocomposite is energy efficient and inexpensive. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the nanocomposite, comprising (a) contacting graphene oxide and water to obtain a first mixture, (b) stirring the first mixture, aminoclay, and at least one first solvent to obtain a second mixture, (c) contacting the second mixture, at least one cupric salt, trimesic acid, at least one second solvent to obtain a third mixture, and (d) processing the third mixture to obtain the nanocomposite; and (2) water-harvesting system comprising (a) an adsorbent layer comprising the nanocomposite, (b) a cooler adjacent to the adsorbent layer, and (c) a heater.