Preparation and characterization of magnetic Fe3O4@sulfonated β-cyclodextrin intercalated layered double hydroxides for methylene blue removal. Issue 53 (13th November 2016)

• Record Type: Journal Article
• Authors: Hu, Wenjihao; Wu, Xia; Jiao, Feipeng; Yang, Weijie; Zhou, Yangmeihui
• Is Part Of: Desalination and water treatment. Volume 57:Issue 53(2016)
• Page Start: 25830
• Page End: 25841
• Publication Date: 2016-11-13
• Subjects: Layered double hydroxides -- Sulfated β-cyclodextrin -- Magnetic iron oxide -- Removal -- Methylene blue; Saline water conversion -- Periodicals; Saline water conversion; Water -- Purification; Periodicals; 628.167
• DOI: 10.1080/19443994.2016.1155173
• Languages: English
• ISSNs: 1944-3994

Abstract

Abstract: Nanocage structures derived from sulfated β -cyclodextrin (SCD) intercalated MgAl layered double hydroxides (MgAl-NO3 LDHs) were prepared through ion-exchange reactions. Coprecipitation method was used to prepare the composites of magnetic Fe3 O4 @sulfonated β -cyclodextrin intercalated LDH (Fe/SCD-LDH), which was demonstrated having an efficient adsorption capability to cationic pollutants and an excellent reuseability. X-ray diffraction and Fourier transform infrared spectroscopy confirmed that SCD was intercalated successfully and the basal spacing was expanded to 1.63 nm. N2 -adsorption/desorption and scanning electron microscopy displayed that the resulting Fe/SCD-LDH possessed high crystallinity, hierarchical structure as well as large specific surface area. Energy-dispersive X-ray spectroscopy was used to investigate the type and content of the elements in Fe/SCD-LDH. Batch adsorption experiments were carried out to investigate the removal of methylene blue (MB) from aqueous solution using Fe/SCD-LDH as the adsorbent. MB was selected owing to its toxic and carcinogenic features as a kind of cationic dye. The adsorption process could be well described by the pseudo-second-order kinetic model and fitted well with the Langmuir isotherm model.