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photodegradation
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Synthesis of Modified Nanocomposite Based on Metal Organic Frameworks for Kinetic Study of Environmental Pollutant Elimination
, M.Sc. Thesis Sharif University of Technology ; Gholami, Mohammad Reza (Supervisor)
Abstract
An environmentally friendly heterogeneous ternary carbon dots (CDs)/MIL-88B (Fe)/Bi2S3 nanocomposite was synthesized by a multistep method. In this study, we have studied low-temperature calcination with relatively inexpensive reactants. Fabricated nanocomposite structures were characterized by FT-IR, XRD, EIS, SEM, BET, and TGA techniques, demonstrating the decoration of the Bi2S3 on the CDs/MIL-88B (Fe) nanocomposite surface. MOF templating has been chosen as a systemic method for limited size CD formation inside MIL-88B (Fe) pores. The CD arrays also revealed an excellent efficacy for catalytic and photocatalytic applications. According to the experimental results, CDs/MIL-88B (Fe)/Bi2S3...
Photocatalytic Degradation of Organic Pollutants in the Presence of Nanocomposites Based on Graphitic Carbon Nitride under Visible Light Illumination
, M.Sc. Thesis Sharif University of Technology ; Hamzehlouyan, Tayebeh (Supervisor) ; Rahman Setayesh, Shahrbanoo (Co-Supervisor)
Abstract
The susceptible light-harvesting and tremendous reduction capability along with the potentiality (photo)electrochemical merits of the thiospinels like CuCo2S4 (CCS) bring forth appreciably an advancement in efficacious photocatalytic reactions. However, scant oxidation potential originated from 3p orbitals of sulfur atoms puts a damper on their performance and is even conducive to self-oxidation. In this research, the surfactant/template free of hierarchical CCS thiospinels was synthesized using solvothermal sulfidation of the affordable glycerate-based CuCo-alkoxide and successfully was embedded with Z-scheme V2O5 deposited on wrinkled g-C3N4 lamella (VO-UCN) in the interest of developing...
Synthesis and Characterization of ZnO/Fe3O4/N-Doped Reduced Graphene Oxide Photocatalyst as Photo-degradation Reagent for Dye Pollutant
, M.Sc. Thesis Sharif University of Technology ; Pourjavadi, Ali (Supervisor)
Abstract
Photocatalysts are compounds that can perform oxidation and reductions in the presence of light. One of the most known applications for photocatalyst is degrading organic contaminants in wastewater and making them harmless to the environment.In this project, a magnetic photocatalyst based on Fe3O4@ZnO/N-RGO has been synthesized and characterized with FT-IR, FE-SEM and EDS, XRD, and TGA. Moreover, photocatalytic dye degradation reactions for Rhodamine B, Methylene Blue, and Methyl Orange have been investigated and compared in the presence of Fe3O4@ZnO/N-RGO, Fe3O4@ZnO/RGO, Fe3O4@ZnO, and ZnO. Furthermore, the performance of the photocatalyst has been studied for 5 consecutive reactions and...
Fabrication and Evaluation of Nanostructured Photocatalysts Using Metal-Organic Frameworks for Photocatalytic Oxidative Desulfurization of Liquid Fuel
, M.Sc. Thesis Sharif University of Technology ; Khorasheh, Farhad (Supervisor) ; Ghotbi, Cirous (Supervisor) ; Larimi, Afsaneh (Supervisor) ; Asgharinejad, Ali Akbar (Co-Supervisor)
Abstract
Ti-UIO-66(Zr) nanocomposites have been prepared via a modified one-step solvothermal methodology and evaluated in photocatalytic oxidative desulfurization. Extensive characterization by X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Energy-dispersive X-ray spectroscopy (EDX), ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS), photoluminescence spectroscopy (PL), nitrogen adsorption-desorption, and thermogravimetric analysis (TGA), have revealed the role of Ti loading, on Ti speciation and the structure of the composite materials. Their performance have been...
Synthesis and Evaluation of Nanostructured Photocatalysts for Organic Pollutants Removal from Wastewater
, M.Sc. Thesis Sharif University of Technology ; Khorashe, Farhad (Supervisor) ; Ghotbi, Siroos (Supervisor) ; Larimi, Afsaneh Sadat (Supervisor) ; Asgharinezhad, Ali Akbar (Co-Supervisor)
Abstract
In this advanced research, titanium dioxide nanotubes were initially synthesized using the hydrothermal method. Subsequently, they were coated with polyaniline, polyindole, or a combination of both polymers using oxidative polymerization. The application of these composites for the removal of the organic pollutant 4-nitrophenol in wastewater was investigated under visible light irradiation from a 250-watt sodium lamp and in the presence of hydrogen peroxide as an oxidizing agent. To characterize the synthesized photocatalysts, various tests were conducted, including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS),...