NOVEL SUPER ADSORBENTS (PVA AND PVA/Cu-MOF NANOFIBRES) AS EFFECTIVE LEAD IONS REMOVER IN AQUEOUS SOLUTION

作者：Shooto N D^*; Wankasi D; Sikhwivhilu L; Dikio E D; Mtunzi F; Maubane M S

来源：Digest Journal of Nanomaterials and Biostructures, 2016, 11(2): 425-434.

• Adsorption
• nanofibres
• electrospinning
• polymer

In this study electrospun PVA nanofibres were functionalized with Cu-MOFs to produce a novel super adsorbing material. The novel nano-composite was analysed by scanning electron microscope (SEM), Fourier transform infrared (FTIR) and Thermogravimetric analysis (TGA). SEM micrograms showed that uniform and non-beaded nanofibres were fabricated. TGA plots showed PVA/Cu-MOF nanofibres exhibit higher decomposition temperature than PVA nanofibres. Thus, it confirmed the interactive force between PVA nanofibres and Cu-MOF. FTIR spectra also exhibited shifts in critical functional groups positions thus it confirmed that there was a given amount of Cu-MOF embedded in the electrospun fibrous mat. Sorption studies were executed to analyse the adsorption of lead ions in aqueous solution. Factors influencing adsorption of lead ions onto PVA nanofibres and functionalized PVA nanofibres (PVA/Cu-MOF) such as concentration, contact time and temperature effect were examined. The thermodynamic parameters: apparent enthalpy (Delta H degrees) and entropy (Delta S degrees) showed that the adsorption of lead ions onto the electrospun nanofibres was spontaneous and exothermic respectively.

• 出版日期2016-6