Document Details
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Document Type |
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Thesis |
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Document Title |
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Impact of Different Nanofillers on the Performance of Conducting Copolymers Nanocomposites تأثير المالئات المتناهية الصغر المختلفة على اداء توليفات البوليمرات المشتركة الموصلة النانونية |
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Subject |
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Faculty of Science |
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Document Language |
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Arabic |
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Abstract |
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The conducting polymers (CPs) are known to have considerable flexibility in chemical structures that can be modified. By chemical modelling, design and synthesis, it is possible to modulate the required thermal, electrical and electrochemical properties of CPs. This study examined the synthesis and improvements to the properties of poly(pyrrole-co-o-toluidine) (P(Py-co-OT)) and crosslinked polyaniline copolymer (CPA); these improvements were facilitated by the design and development of new nanocomposites (NCs) that bear electrochemical properties ideal for the fabrication of electrodes used in sensor applications (i.e., the detection of heavy metal ions and phenol in aquatic environments). The following new NCs were prepared via the chemical oxidation polymerization method. Binary P(Py-co-OT)/MFe2O4 (M = Mg, Co, Ni, Cu, and Zn), ternary P(Py-co-OT)/NiFe2O4/crosslinked single-walled carbon nanotubes [P(Py-co-OT)/NF/C-SWCNTs)], binary P(Py-co-OT)/CoFe2O4 with different CoFe2O4 weight ratios (5, 10, 30, 50, and 70 w/w) [P(Py-co-OT)/CF(5, 10, 30, 50, 70)], ternary P(Py-co-OT)/CoFe2O4/reduced (graphene, oxide-oxidized single-walled carbon nanotube) [P(Py-co-OT)/CF/R(GO-OXSWCNTs)], ternary P(Py-co-OT)/CoFe2O4/Chitosan [P(Py-co-OT)/CF/CS], binary CPA/carbon nanomaterials [CPA/CNMs] [CNMs = G, SWCNTs, MWCNTs, (G-SWCNTs), and (G-MWCNTs)], binary CPA/oxidized carbon nanomaterials [CPA/OXCNMs] [OXCNMs = GO, OXSWCNTs, OXMWCNTs, (GO-OXSWCNTs), and (GO-OXMWCNTs)] and ternary CPA/Chitosan-graphene oxide-oxidized single-walled carbon nanotube/CuO NCs [CPA/CS-GO-OXSWCNTs/CuO]. The structural, morphological, thermal, electrical, and electrochemical properties of all NCs were investigated in-depth by using XRD, FT-IR, RAMAN, SEM, EDX, elemental mapping, TEM, AFM, TGA-DTG, DTA, electrical, and sensing measurements. All NCs displayed thermal stability, conductive behaviour and superior electrochemical performance. Thermochemical analysis of the heat generated by copolymer formation was undertaken by employing density functional theory (DFT). This study additionally suggests a potential mechanism underlying the formation of each novel NC herein. The electrochemical performance of the new NCs was examined through two different methods. A selective ions electrochemical sensor was fabricated by coating a glassy carbon electrode (GCE) with synthesized NCs. Based on the I-V approach and with the use of a Keithley electrometer, it was found that the electrochemical sensors of P(Py-co-OT)/NF/C-SWCNTs, P(Py-co-OT)/CF10, P(Py-co-OT)/CF/R(GO-OXSWCNTs), and P(Py-co-OT)/CF/CS NCs showed a preference for Fe3+, Pb2+, Ga3+, and Co2+ ions, respectively. The modified electrodes of CPA/CNMs, CPA/OXCNMs, and CPA/CS-GO-OSWCNTs/CuO NCs were studied through the use of square wave voltammetry (SWV) techniques; all showed an affinity for the oxidation of chlorophenol compounds. The suggested sensors exhibited good stability, sensitivity, and selectivity, and display potential for detection in real environmental samples. |
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Supervisor |
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Prof. Dr. Mahmoud Ali Hussein |
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Thesis Type |
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Doctorate Thesis |
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Publishing Year |
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1441 AH
2020 AD |
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Co-Supervisor |
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Prof. Dr. Tariq Rashad Sobahi |
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Added Date |
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Sunday, May 17, 2020 |
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Researchers
| دينا فيصل كتوعة | Katowah, Dina Faisal | Researcher | Doctorate | |
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