title: Synthesis of core-shell SiO₂@MgO with flower like morphology for removal of crystal violet in water.
abstract: In this study, we report a facile and effective route to synthesize core-shell SiO2@MgO with flower like morphology, which the shell is assembled by magnesium oxide nanosheets. The SiO2@MgO composite (SMC) was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectrometry (EDX), X-ray fluorescence (XRF) and N2 adsorption-desorption techniques. The sample showed excellent performance for the removal of crystal violet due to its high specific surface area and porous structures. Adsorption data fitted better with Langmuir isotherm and the maximum adsorption capacity was 2244.85 mg g(-1). The kinetic data was better described by pseudo-second order model and thermodynamic studies showed that adsorption process was spontaneous and endothermic. The adsorbent also showed very good reproducibility and reusability for the successive five cycles, indicating a promising potential material for environmental remediation.
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China.
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Pei
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China.
authors.forename: Man
authors.initials: M
authors.lastname: Wang
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China.
authors.forename: Di
authors.initials: D
authors.lastname: Tian
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China.
authors.forename: Xuefeng
authors.initials: X
authors.lastname: Xu
authors.affiliation: College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China. Electronic address: ljyuan@whu.edu.cn.
authors.forename: Liangjie
authors.initials: L
authors.lastname: Yuan
mesh_terms: D000327:Adsorption; D000891:Anti-Infective Agents, Local / Q000302:isolation & purification*; D005840:Gentian Violet / Q000302:isolation & purification*; D008277:Magnesium Oxide / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D012822:Silicon Dioxide / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D000891:Anti-Infective Agents, Local; D005840:Gentian Violet; D008277:Magnesium Oxide; D012822:Silicon Dioxide; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Adsorption; Crystal violet; Flower like; SiO(2)@MgO