title: Effect of large pore size of multifunctional mesoporous microsphere on removal of heavy metal ions.
abstract: Pore size of mesoporous materials is crucial for their surface grafting. This article develops a novel multifunctional microsphere with a large pore size mesoporous silica shell (ca. 10.3 nm) and a magnetic core (Fe₃O₄), which is fabricated using cetyltrimethylammonium bromide (CTAB) as pore-forming agents, tetraethyl orthosilicate (TEOS) as silicon source through a sol-gel process. Compared with small pore size mesoporous silica magnetic microspheres (ca. 2-4 nm), the large pore size one can graft 447 mg/g amino groups in order to adsorb more heavy metal ions (Pb(2+): 880.6 mg/g, Cu(2+): 628.3mg/g, Cd(2+): 492.4 mg/g). The metal-loaded multifunctional microspheres could be easily removed from aqueous solution by magnetic separation and regenerated easily by acid treatment. The results suggest that the large pore size multifunctional microspheres are potentially useful materials for high effectively adsorbing and removing different heavy metal ions in aqueous solution.
authors.affiliation: Institute of Nano-photonics, School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Yuan
authors.affiliation: Key Laboratory of Automobile Materials of Ministry of Education, School of Material Science and Engineering, Jilin University, Changchun 130012, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Li
authors.affiliation: Key Laboratory of Automobile Materials of Ministry of Education, School of Material Science and Engineering, Jilin University, Changchun 130012, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Chi
authors.affiliation: Key Laboratory of Space Applied Physics and Chemistry of Ministry of Education, School of Science, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Wangchang
authors.initials: W
authors.lastname: Geng
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
authors.forename: Wenfu
authors.initials: W
authors.lastname: Yan
authors.affiliation: Institute of Nano-photonics, School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Automobile Materials of Ministry of Education, School of Material Science and Engineering, Jilin University, Changchun 130012, China. Electronic address: xiaotianli@jlu.edu.cn.
authors.forename: Xiaotian
authors.initials: X
authors.lastname: Li
authors.affiliation: Institute of Nano-photonics, School of Physics and Materials Engineering, Dalian Nationalities University, Dalian 116600, China. Electronic address: dong@dlnu.edu.cn.
authors.forename: Bin
authors.initials: B
authors.lastname: Dong
mesh_terms: D000327:Adsorption; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D019216:Metals, Heavy / Q000737:chemistry*; D008863:Microspheres; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D012822:Silicon Dioxide; D052203:Ferrosoferric Oxide