Issue 83, 2015

Adsorptions of Cd(ii) and methylene blue from aqueous solution by silica hybrid hollow spheres

Abstract

Silica hybrid hollow spheres were successfully synthesized by co-hydrolysis and condensation reactions of TEOS and vinyltrimethoxysilane (VTMS) under the catalysis of ammonia. The as-obtained silica hybrid hollow spheres were used as adsorbents for the removal of Cd(II) and methylene blue (MB) from aqueous solutions. The isotherm adsorption data of the silica hybrid hollow spheres for Cd(II) and MB followed the Langmuir isotherm model. The silica hybrid hollow spheres exhibited the adsorption capacities as high as 54.702 and 25.242 mg gāˆ’1 for Cd(II) and MB, respectively. The adsorption kinetics of Cd(II) and MB onto the silica hybrid hollow spheres can be well fitted to the pseudo-second-order model. The adsorption processes of Cd(II) and MB onto the silica hybrid hollow spheres at 298, 318 and 338 K could be carried out spontaneously.

Graphical abstract: Adsorptions of Cd(ii) and methylene blue from aqueous solution by silica hybrid hollow spheres

Supplementary files

Article information

Article type
Paper
Submitted
08 Jul 2015
Accepted
03 Aug 2015
First published
03 Aug 2015

RSC Adv., 2015,5, 68092-68098

Author version available

Adsorptions of Cd(II) and methylene blue from aqueous solution by silica hybrid hollow spheres

J. Hu, L. Liu and Z. Xiao, RSC Adv., 2015, 5, 68092 DOI: 10.1039/C5RA13413G

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