1. Mercapto-functionalized ordered mesoporous silica-modified PVDF membrane for efficiently scavenging Cd2+ from water.
- Author
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Zhao, Fengbin, Yao, Xinyun, Liu, Chang, Ran, Xianqiang, Wang, Chengxian, and Lu, Bin
- Subjects
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MESOPOROUS silica , *POLYVINYLIDENE fluoride , *SMALL-angle scattering , *ADSORPTION capacity , *HEAVY metals , *SURFACE area , *METAL ions - Abstract
In this study, (3-mercaptopropyl) triethoxysilane (MPTMS)-modified ordered mesoporous silica (OMS) materials were prepared using a post-grifting method, with MPTMS as the organic functionalized reagent. The OMS materials were analyzed by FT-IR spectra, N 2 sorption, and small angle X-ray scattering to evaluate their potential for scavenging Cd2+ from water. Moreover, a (3-mercaptopropyl) triethoxysilane-functionalized ordered mesoporous silica modified polyvinylidene fluoride (MPTMS-OMS/PVDF) membrane was synthesized using the solvent phase inversion method to remediate wastewater containing heavy metal ions. The MPTMS-OMS was characterized by a maximum specific surface area of 422 m2/g, high surface hydrophilicity, and high pure water flux. The MPTMS-OMS/PVDF exhibited a dynamic adsorption capacity for Cd2+ in water. At an MPTMS-OMS content of 5 wt%, the Cd2+ removal efficiency was 90%, whereas the pure PVDF showed no Cd2+ adsorption capacity. These results highlight the potential of the MPTMS-OMS/PVDF membrane to eliminate Cd2+ during the decontamination of aqueous streams containing low-concentrations of contaminants. [Display omitted] • MPTMS-OMS/PVDF membrane was synthesized using the solvent phase inversion method. • The Cd2+removal efficiency of the MPTMS-OMS/PVDF membrane reached 90%. • Mercapto-doped MPTMS-OMS/PVDF showed a high adsorption capacity for Cd2+. • MPTMS-OMS enhanced the specific surface area of composite membrane (422 m2/g). [ABSTRACT FROM AUTHOR]
- Published
- 2022
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