An efficient solution-based chemical process was developed to
prepare hollow LDH nanowires with large surface area. In this
synthesis system, the alkali and hydrazine act as cooperatingmediated
reagents and play a significant role in the formation of
hollow LDH nanowires. Starting nickel salt and aluminum salt were
first converted to amorphous hydroxide precursor by hydrazine in aqueous solution at room temperature, and subsequently the precursor
was transformed to hollow LDH nanowires via a dissolution
renucleation process under the hydrothermal reaction. Based on
detailed characterizations of the as-obtained hollow LDH nanostructure,
the possible formation mechanism were clarified. Due to
these novel hierarchical structures and high specific surface area,
the as-obtained hollow LDH nanostructures were found to be
effective adsorbents for the removal of organic dye in water
treatment.