الفهرس | Only 14 pages are availabe for public view |
Abstract Our thesis is divided into four chapters. It focuses on the preparation of polyaniline-montmorillonite (PANI-NF-MMT), polyaniline-rice husk silica nanoparticles (PANI-NF-RH-SNP) and graphene-polypyrrole nanoparticles composite (GRP-PPY-NP). The developed nanocomposites achieved superior adsorption uptake efficiency for removal of Zn2+ and Cr3+ ions compared to polyaniline nanofibers alone. On the other hand, graphene-polypyrrole nanoparticles composite were developed. Polypyrrole nanoparticles were polymerized on the surface of graphene sheets originated from graphite using facile approach. The developed nanocomposite achieved superior adsorption uptake efficiency for removal of Mn+2 than polypyrrole nanoparticles alone. The introduction is a general overview polyaniline-montmorillonite (PANI-NF-MMT), polyaniline-rice husk silica nanoparticles (PANI-NF-RH-SNP) and graphene-polypyrrole nanoparticles composite (GRP-PPY-NP) preparation, characterization and potential applications. Literature review of this research work includes the fundamentals and motive for choosing PANI-NF-MMT, PANI-NF-RH-SNP and (GRP-PPY-NP) nanocomposites, the interesting and improved features of as-synthesized nanocomposites and the proposed fabrication route for MMT and NF-RH-SNP nanoparticles decorated PANI composites and PPY nanoparticles decorated 117 graphene composites. Finally, the chapter will end up with discussing the performance of nanocomposites in wastewater treatment from heavy metal ions. Materials and methodologies introduced the reliable pathway for preparation of PANI-NF-MMT, PANI-NF-RH-SNP and GRP-PPY-NP. Various characterization tools that employed to define the nanocomposites characteristics such as FTIR spectroscopy, Dispersive Raman spectrometer, Thermogravimetric analysis (TGA), Scanning electron microscope (SEM) and Transmission electron microscopy (TEM). At last, the measurements of heavy metal ions removal from aqueous solutions using the obtained nanocomposites are described. Atomic Absorption Spectrophotometer (AAS), was used for measuring the residual concentrations of Zn(II), Cr(III) and Mn(II) heavy metal ions. Results and Discussion This chapter explores the result obtained from analytical techniques for the characterization studies of structural, morphological features of PANI-NF-MMT, PANI-NFRH-SNP and PPY-G nanocomposites. In addition, the performance of the prepared nanocomposites as superior sorbents for heavy metal ions also was investigated. The nanomaterials shape controlled the efficiency of nanocomposite for removal of specific metal ions. Therefore, PANI-NF-MMT was specific for highly uptake efficiency of Zn2+ achieving 95%, PANI-NF-RH-SNP was found to specific for high uptake efficiency of Cr3+ recording 92%, however, GRP-PPY-NP was specific for highly uptake efficiency of Mn+2 achieving 89%. |