Preparation of Magnetic Composite Hollow Microsphere and Its Adsorption Capacity for Basic Dyes
发表时间：2019-03-09
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- 论文类型：
- 期刊论文
- 第一作者：
- Zhang, Honglei
- 通讯作者：
- Li, XC (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, R&D Ctr Membrane Sci & Technol, Sch Chem Engn, Dalian 116024, Peoples R China.
- 合写作者：
- Li, Xiangcun,He, Gaohong,Zhan, Jingjing,Liu, Dan
- 发表时间：
- 2013-11-27
- 发表刊物：
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
- 收录刊物：
- SCIE、EI、Scopus
- 文献类型：
- J
- 卷号：
- 52
- 期号：
- 47
- 页面范围：
- 16902-16910
- ISSN号：
- 0888-5885
- 摘要：
- Magnetic microspheres with an Fe3O4 core and a SiO2-TiO2 hybrid shell were prepared by a surfactant-assisted aerosol process and subsequent etching treatment. The core-shell spheres with robust and chemically stable Ti-O-Si shells exhibit excellent adsorption performance toward basic dyes. The maximum adsorption capacities were obtained at 147 mg/g for methylene blue (MB) and 124.6 mg/g for basic fuchsin. MB with an initial concentration of 20 mg/L can be completely removed in 5 min at a dosage of 0.5 mg/L, and the equilibrium time is 90 min in the MB concentration range 20-250 mg/L. The adsorption kinetics follows the pseudo-second-order model. Furthermore, the dye saturated microspheres can be easily recycled by an external magnetic field and regenerated using 1-3 wt % NaOH aqueous solution. After six recycle runs, 98% of the adsorption capacity was still retained. The low-cost magnetic hollow spheres with good adsorption capacity are a promising candidate for water treatment.
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