▎ 摘　　要

NOVELTY - Preparing graphene oxide loaded UIO-66 composite material comprises (i) adding graphite powder and sodium nitrate into concentrated sulfuric acid, stirring to obtain system A, placing system A at 0-10 degrees C, adding oxidant, placing at 20-30 degrees C for 2-3 hours to obtain system B, place system B in an ice water bath, adding deionized water, placing it at room temperature, adding excess hydrogen peroxide, reacting for 0.5-2 hours, washing and drying to obtain graphene oxide nanosheets; (ii) purifying the graphene oxide nanosheets in to obtain a graphene oxide suspension; (iii) dissolving zirconium chloride and terephthalic acid in N'-N-dimethylformamide, adding acetic acid and hydrochloric acid, and reacting under stirring for 1-2 hours to obtain UIO-66 precursor solution;(iv) adding the suspension of graphene oxide into the precursor solution of UIO-66 and mixing evenly to obtain system C; and (v) placing the system C at 100-120 degrees C for 3-12 hours, washing and drying under vacuum. USE - The composite material is useful as adsorbent for adsorbing and removing hexavalent chromium ions in wastewater (claimed).