Open AccessA new synthesis method of ultrathin Zn-Al layered double hydroxide with super adsorption capacity
Author(s) -
Qing Nie,
Jiami Ma,
Yafan Xie
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/300/5/052003
Subject(s) - adsorption , hydroxide , intercalation (chemistry) , layered double hydroxides , exfoliation joint , sodium hydroxide , inorganic chemistry , methyl orange , materials science , benzene , chemistry , chemical engineering , nuclear chemistry , nanotechnology , organic chemistry , graphene , photocatalysis , engineering , catalysis
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 m 2 /g) as compared to the pristine sample (26.6 m 2 /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.