Amino modified mesostructured silica nanoparticles for efficient adsorption of methylene blue.
In this work, mesostructured silica nanoparticles (MSN(AP)) with high adsorptivity were prepared by a modification with 3-aminopropyl triethoxysilane (APTES) as a pore expander. The performance of the MSN(AP) was tested by the adsorption of MB in a batch system under varying pH (2-11), adsorbent dosage (0.1-0.5 g L(-1)), and initial MB concentration (5-60 mg L(-1)). The best conditions were achieved at pH 7 when using 0.1 g L(-1) MSN(AP) and 60 mg L(-1)MB to give a maximum monolayer adsorption capacity of 500.1 mg g(-1) at 303 K. The equilibrium data were evaluated using the Langmuir, Freundlich, Temkin, and Harkins-Jura isotherms and fit well to the Freundlich isotherm model. The adsorption kinetics was best described by the pseudo-second order model. The results indicate the potential for a new use of mesostructured materials as an effective adsorbent for MB.
Ibnu Sina Institute for Fundamental Science Studies, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
A H
AH
Karim
A A
AA
Jalil
S
S
Triwahyono
S M
SM
Sidik
N H N
NH
Kamarudin
R
R
Jusoh
N W C
NW
Jusoh
B H
BH
Hameed
D000327:Adsorption; D007700:Kinetics; D008751:Methylene Blue / Q000737:chemistry*; D053758:Nanoparticles / Q000737:chemistry*; D011437:Propylamines; D012821:Silanes / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D014961:X-Ray Diffraction
D011437:Propylamines; D012821:Silanes; D012822:Silicon Dioxide; C477625:amino-propyl-triethoxysilane; D008751:Methylene Blue