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    Synthesis of Cationic Mesoporous Silica Nanoparticles as a Carrier for the Deliveryof Nucleic Acids

    , M.Sc. Thesis Sharif University of Technology Kermanshah, Leyla (Author) ; Vosoughi, Manouchehr (Supervisor) ; Arpanaei, Ayyoob (Supervisor) ; Javadi, Hamid Reza (Co-Advisor)
    Abstract
    Mesoporous silica nanoparticles (MSNP) have attracted lots of attentions because of their particular characteristics. Physical characteristics such as structure, morphology, porosity, and size of these nanoparticles have strong impact on their function and it can be conceived a wide range of applications for them by manipulating these characteristics. In this research, monodispersed MSNPs with a controllable size in the range of 50-130 nm and pore size in the range of 4-24 nm were synthesized and positively functionalized in order to develop a carrier for the delivery of nucleic acids (siRNA and pDNA). The MSNPs were synthesized by the template removing method.In this method, sodium... 

    Dye Removal from Wastewater Using Functionalized Copper Oxide–zinc Oxide Nanocomposite as an Adsorbent

    , M.Sc. Thesis Sharif University of Technology Chamani, Houman (Author) ; Kariminia, Hamid Reza (Supervisor) ; Mahmoudi, Niyaz Mohammad (Supervisor)
    Abstract
    In this thesis, the copper oxide - zinc oxide nanocomposite was synthesized and functionalized using 3-aminopropyltrimethoxysilane. The functionalized nanocomposite was characterized using X-ray Diffraction spectroscopy (XRD), Fourier Transform Infrared (FT-IR), X-ray Fluorescence Spectroscopy (XRF), Scanning Electron Microscopy (SEM) and Brunauer–Emmett–Teller (BET). Dye removal from synthetic wastewater was done in a batch system using functionalized copper oxide - zinc oxide nanocomposite as adsorbent. Direct red 23, direct red 80 and direct red 81 were used for preparation of synthetic wastewaters. The effects of operational parameters such as adsorbent dosage, initial dye concentration,... 

    Design and Synthesis of Functionalized Magnetic Nanocomposites for Removal of Dye And Heavy Metal Ions from Water and Theoretical Study on Their Selectivity

    , Ph.D. Dissertation Sharif University of Technology Abedin Moghanaki, Azardokht (Author) ; Pourjavadi, Ali (Supervisor)
    Abstract
    In this thesis, it reports the fabrication of novel magnetic nanocomposites combining the unique properties of magnetic nanoparticles and cross-linked basic polymers that their surface functionalized by suitable groups such as carboxylate groups, pentaethylenehexamine and so on to achieve the maximum adsorption capacity of dyes and heavy metal ions. The performance of the magnetic nanocomposites for removal of anionic and cationic dyes and heavy metal ions were evaluated in different conditions of pH, contact time and initial concentrations. Moreover, the adsorption mechanism was investigated by kinetic models and isotherm studies. The results showed that the abovementioned adsorbents can... 

    Investigation on Photocatalytic and Corrosion Properties of Titania-Graphene Nanocomposite Coated by Electrophoretic Method

    , M.Sc. Thesis Sharif University of Technology Hadidi Masouleh, Mohammad Reza (Author) ; Nemati, Ali (Supervisor) ; Sadeghian, Zahra (Supervisor)
    Abstract
    The main purpose of this research was functionalizing graphene, in order to achieve higher hydrophobicity, and producing nanocomposite of functionalized graphene and titanium dioxide by hydrothermal method, and sequently invastigation on photocatalytic properties of the powders and corrosion properties of EPD coated samples. Graphene oxide was synthesized by improved Hummers method and reduced and sequently was functionalized through the chemical process with hydrazine and octadecylamine respectively. Then the nanocomposite of functionalized graphene-titania was synthesized by use of titanium isopropoxide precursor and its photocatalytic properties were measured. The analysis of the... 

    Synthesis of Boron Nitride Quantum Dots Using a Mechanical Milling- Solvothermal Process

    , M.Sc. Thesis Sharif University of Technology Angizi, Shayan (Author) ; Simchi, Abdolreza (Supervisor)
    Abstract
    Boron Nitride Quantum Dots, as a new member of Heavy-metal-free Quantum dots has attracted many attention due to their unique properties. The hyroxylate functionalized BNQDs was synthesized with two steps fabrication approache which were contained mechanical milling and solvothermal process. It has been shown that 12 hours for mechanical milling and 24 hours for solvothermal process would be the most optimum time that produce well disperse functionalized BNQDs . The characterization results have proved that the as-prepared BNQDs have lateral size at around 5 nm with thickness in range of 4-6 layers. Also, it has been demonstrated that OH functional groups can attache into the surface of...