Cyclodextrin Functionalized Mesoporous Silica for Environmental Remediation of Methylene Blue Dye.
J Nanosci Nanotechnol
; 19(2): 770-779, 2019 02 01.
Article
em En
| MEDLINE
| ID: mdl-30360152
ABSTRACT
Functionalization of mesoporous silica KIT-6 with ß-cyclodextrin (ß-CD) was successfully realized via post-grafting method as a new adsorbent for environmental remediation of methylene blue (MB) dye from aqueous solutions. The mesostructure properties were characterized by transmission electron microscope (TEM), low-angel X-ray diffraction (XRD), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and N2 sorption isotherm. The remarkable adsorption of MB into ß-CD-KIT-6 adsorbent was studied using UV-visible spectroscopy. The ß-CD-KIT-6 exhibited higher adsorption capacity compared with unmodified-KIT-6. The adsorption behavior of MB into the ß-CD-KIT-6 and unmodified-KIT-6 was carefully investigated using different kinetic and isotherm models. The adsorption process followed a pseudo-second order kinetic model and well-fitted to Langmuir isotherm. The thermodynamic parameters were evaluated and the adsorption of MB was found to be an exothermic and spontaneous process. The adsorption of MB into the ß-CD-KIT-6 was highly dependent on the solution pH.
Texto completo:
1
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Nanosci Nanotechnol
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Egito