Abstract
Layered double hydroxide (LDH) is a kind of stratiform compound with a large specific surface area and strong adsorption capacity, which is widely used in printing and dyeing wastewater treatment. Herein, we synthesized ultrathin Zn-Al LDH (U-Zn-Al LDH) by temperature-assisted intercalation exfoliation strategy using sodium dodecyl benzene sulfonate (SDBS) at 80 ° C. The thickness of the obtained U-Zn-Al LDH was about 4.5 nm and it featured higher specific surface area (49.5 m2/g) as compared to the pristine sample (26.6 m2/g). As a result, U-Zn-Al LDH exhibited higher adsorption activity of methyl orange (MO) dye. Furthermore, the possibly existed defects during the ultrathining process changed the adsorption mode of MO, resulting in a vertical and ordered configuration of MO on U-Zn-Al LDH, which was another reason for its higher adsorption capacity.
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