Preparation of spherical aminopropyl-functionalized MCM-41 and its application in removal of Pb(II) ion from aqueous solution

Yi Lin, Jinjia Xu, Bhosale Sanjana Sudhakar, Junjie Gu, Ruoyu Hong

Research output: Contribution to journalArticlepeer-review

Abstract

Mesoporous silica microspheres were prepared by the polymerization-induced colloid aggregation (PICA) and pseudomorphic synthesis methods. The prepared microspheres have high specific surface area and MCM-41 type structure. In the PICA process, acidic silica sol was utilized as silica source and the effect of molar ration (formaldehyde/urea) was investigated. Moreover, the influences of reaction time and temperature were also studied. The specific surface area of porous and mesoporous silica microspheres were 186.4 m2/g and 900.4 m2/g, respectively. The materials were characterized by SAXS, FTIR, SEM, TEM and nitrogen sorption measurements. The prepared silica microspheres were functionalized by (3-Aminopropyl)triethoxysilane and then used to remove the lead from aqueous solution. The result indicates that the grafted silica microspheres have rapid adsorption capacity and good reproducibility. The adsorption data was fitted well with the Langmuir isotherm model, and the maximum adsorption capacities for MCM-41 silica microspheres were 102.7 mg/g.

Original languageAmerican English
JournalNanotechnology Reviews
Volume8
DOIs
StatePublished - Jan 2019

Keywords

  • MCM-41
  • aminopropyl groups
  • lead (II) ion adsorption
  • microspheres

Disciplines

  • Biochemistry, Biophysics, and Structural Biology

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