title: The cooperative adsorption properties of cetyl/amino-SBA-15 for 4-nonylphenol.
abstract: In this study, mesoporous SBA-15 bifunctionalized with cetyl and amino groups (cetyl/amino-SBA-15) was successfully prepared by a post-synthesis grafting method. Detailed characterization by XRD, FT-IR, N2 adsorption-desorption and elemental analysis confirmed that cetyl/amino-SBA-15 still retained a long-range ordered hexagonal mesostructure. Cetyl and aminopropyl groups were simultaneously functionalized on the surface of SBA-15. The adsorption capacity of cetyl/amino-SBA-15 was much higher than the arithmetic sum of those of cetyl-SBA-15 and amino-SBA-15 due to the cooperative effect of hydrogen bonding/electrostatic interaction between 4-nonylphenol (4-NP) and aminopropyl groups and hydrophobic interactions between 4-NP and cetyl groups. The effects of the dosage and mole ratio of cetyl and amino groups on the adsorption properties of cetyl/amino-SBA-15 for 4-NP were also investigated. Cetyl/amino-SBA-15 exhibited excellent adsorption capacity over a wide range of pH values and cetyl/amino-SBA-15(3.2/0.8) displayed the highest adsorption capacity up to 120 mg g(-1). Furthermore, cetyl/amino-SBA-15 exhibited high adsorption selectivity for 4-NP against phenol as well as high reusability, showing great potential for applications in wastewater treatment.
authors.affiliation: The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China. huyun@scut.edu.cn.
authors.forename: Feng
authors.initials: F
authors.lastname: Quan
authors.forename: Yun
authors.initials: Y
authors.lastname: Hu
authors.forename: Xingchen
authors.initials: X
authors.lastname: Liu
authors.forename: Chaohai
authors.initials: C
authors.lastname: Wei
mesh_terms: D000327:Adsorption; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D010636:Phenols; C509969:SBA-15; D012822:Silicon Dioxide; C041594:4-nonylphenol