دكتري

شيمي آلي - پليمر

اصفهان : دانشگاه صنعتي اصفهان

1397

چهارده، [۱۳۲]ص.: مصور، جدول، نمودار

شادپور ملك پور

كيومرث زرگوش

محمدعلي زلفي گل، محمد ديناري، غلامحسن محمدنژاد

1397/11/30

كتابنامه

شيمي

شيمي

1397/12/04

ID1326 دكتري

129 Polymeric nanocomposites containing recycled polyethyleneterephthalate and functionalized MWNTs with anionic nanoclays and quantum dots of ZnO and carbon Their application in Cd2 and methylene blue removal Vajiheh Behranvand V Behranvand@yahoo com Vajiheh Behranvand@ch iut ac ir January 2019 Department of ChemistryIsfahan University of Technology 84156 83111 Isfahan IranSupervisor Prof Shadpour Mallakpour mallak@cc iut ac ir mallak777@yahoo com mallakpour84@alumni ufl eduAdvisor Dr Kiomars Zargoosh Department Graduate Program Coordinator Dr Mohammad Dinari Isfahan University of Technology Isfahan 84156 83111 Islamic Republic of IranAbstractIn this thesis the surface of multi walled carbon nanotubes MWNT s was functionalized by layered doublehydroxides LDH s ZnO quantum dots ZnO QD s and carbon QDs CQD s for the homogeneousdispersion of them in the polymer matrix After surface functionalization of MWNTs they werecharacterized by different techniques such as FT IR XRD TEM TGA and so on Then polyethyleneterephthalate PET bottle waste was recycled and employed as a composite matrix A facile method wasused to prepare recycled PET r PET reinforced with different fillers The prepared nanocomposites NC swere fully characterized Morphological investigation represented that the hybrids were well distributed inthe r PET matrix Due to the low amount of filler no significant changes were observed in the thermalproperties of NCs It was tried to examine behavior of prepared NCs for removal of pollutants such ascadmium Cd2 and methylene blue MB Effects of pH adsorbent dosage time concentration andtemperature were investigated on the sorption process Adsorption isotherms investigation as well askinetic studies were also performed via linear and nonlinear models Favorable sorption was confirmed byextracted parameters from isotherms A good relationship with the pseudo second order model wasrepresented by the kinetics data for all sorbents On the other hand thermodynamic parameters showedphysisorption Overall it can be concluded from the obtained results that a physico chemical pathways playa key role in this sorption process r PET MWNT LDH NC could adsorb about 60 Cd2 from the aqueoussolution after 5 minutes r PET MWNT ZnO QD NC adsorbed 48 Cd2 after 5 minutes The maximumadsorption capacities of Cd2 for sorbents of r PET MWNT LDH and r PET MWNT ZnO QD were foundto be 38 86 and 39 94 mg g 1 respectively After 1h r PET MWNT CQD NC separated about 45 dyefrom water The maximum adsorption capacity for MB sorption by r PET MWNT CQD sorbent wasobtained 9 42 mg g 1 The resulted NCs had the potential of recycling and reuse for pollutants removal fromwater According to these results and their comparison with other sorbents the fabricated NCs are activereusable sorbents for pollutants adsorption In fact the combination of a small amount of expensive CNTswith a cheap PET can direct the scientists to present an effective and low cost sorbents for contaminantelimination Key Words Multiwalled carbon nanotubes Surface functionalization Polyethyleneterephthalate recycling Nanocomposite Cadmium Methylene blue Reusability

شادپور ملك پور

كيومرث زرگوش

محمدعلي زلفي گل، محمد ديناري، غلامحسن محمدنژاد