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Heteropoly blue-intercalated layered double hydroxides for cationic dye removal from aqueous media
Abstract Heteropoly blue-intercalated layered double hydroxide (HB-LDH) was obtained by aqueous ion exchange of a Zn–Al LDH precursor in nitrate form with the reduced polyoxometalate anions [PW10Mo2O40]5−. The physicochemical properties of the product were characterized by the methods of powder X-ray diffraction, infrared spectroscopy, and cyclic voltammetry. The HB-LDH has been used for the removal of cationic dye methylene blue (MB) from aqueous solutions via adsorption. The intercalation of large cluster anion [PW10Mo2O40]5− into LDH could induce the adsorption to cationic dye of MB, obviously. The HB-LDH shows much higher cationic dye adsorption capacity than pure LDH and the maximum adsorption capacity Q max of MB onto ZnAl–PW10Mo2 is 30.87mg/g.
Graphical abstract Display Omitted Highlights ► Heteropoly blue-pillared layered double hydroxide was obtained for the first time. ► It can be used for the removal of cationic dye from aqueous solutions by adsorption. ► It appears in higher cationic dye adsorption capacity than only LDH. ► The sorption data could be well fitted with the second order kinetic model.
Heteropoly blue-intercalated layered double hydroxides for cationic dye removal from aqueous media
Abstract Heteropoly blue-intercalated layered double hydroxide (HB-LDH) was obtained by aqueous ion exchange of a Zn–Al LDH precursor in nitrate form with the reduced polyoxometalate anions [PW10Mo2O40]5−. The physicochemical properties of the product were characterized by the methods of powder X-ray diffraction, infrared spectroscopy, and cyclic voltammetry. The HB-LDH has been used for the removal of cationic dye methylene blue (MB) from aqueous solutions via adsorption. The intercalation of large cluster anion [PW10Mo2O40]5− into LDH could induce the adsorption to cationic dye of MB, obviously. The HB-LDH shows much higher cationic dye adsorption capacity than pure LDH and the maximum adsorption capacity Q max of MB onto ZnAl–PW10Mo2 is 30.87mg/g.
Graphical abstract Display Omitted Highlights ► Heteropoly blue-pillared layered double hydroxide was obtained for the first time. ► It can be used for the removal of cationic dye from aqueous solutions by adsorption. ► It appears in higher cationic dye adsorption capacity than only LDH. ► The sorption data could be well fitted with the second order kinetic model.
Heteropoly blue-intercalated layered double hydroxides for cationic dye removal from aqueous media
Bi, Bo (author) / Xu, Lin (author) / Xu, Bingbing (author) / Liu, Xizheng (author)
Applied Clay Science ; 54 ; 242-247
2011-09-12
6 pages
Article (Journal)
Electronic Resource
English
Heteropoly blue-intercalated layered double hydroxides for cationic dye removal from aqueous media
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