Document Details
|
Document Type |
: |
Thesis |
|
Document Title |
: |
Synthesis of Metal Nanoparticles, Encapsulation with Organic Molecules, their Characterization, and Applications تركيب مواد متناهية الصغر بتغليفها بمركبات عضوية خواصها وتطبيقاتها |
|
Subject |
: |
Faculty of Sciences |
|
Document Language |
: |
Arabic |
|
Abstract |
: |
Synthesis of highly stable copper nanoparticles (CuNPs) has currently become a hot topic among researchers. There are many reasons that make CuNPs particularly attractive for the rapid developments in material science and technology. The chemical and physical properties of CuNPs are striking and CuNPs have found wide applications in various fields such as electronics, optics, biosensing, photocatalysis, electrochemical sensing, and as antimicrobial materials in healthcare devices. The colloidal dispersion of CuNPs is very much prone to oxidation under ambient conditions, and the long-term stability of CuNPs colloidal dispersion is a difficult task to achieve. Herein, we have synthesized highly stable dispersion of CuNPs using a cost-effective, convenient, and straightforward method. The synthesis, which is categorized as a green route, utilized ascorbic acid as reducing and capping agent for the reduction of Cu(II) precursor salt in aqueous solution. Furthermore, to understand mechanistic aspects of colloidal stability, several other organic compounds as capping agents such as starch, paracetamol, and ibuprofen were used. The kinetics of the reaction were also investigated. Moreover, facile routes for solid and protected CuNPs, and for composites of CuNPs with graphene (Gr), graphene oxide (GO) and multi-walled carbon nanotubes (MWCNTs) were also developed and discussed. The characterization studies were performed using standard techniques such as UV-Visible Absorbance Spectroscopy (UV-Vis) and Fourier Transform Infrared Spectroscopy (FTIR). The electrochemical behavior of synthesized CuNPs was evaluated by performing cyclic voltammetry (CV) experiments. The electrical properties of CuNPs were evaluated using electrochemical impedance spectroscopy (EIS). The sensing ability of the synthesized CuNPs was tested, for the electrochemical detection of trichloroacetic acid (TCA) and 2-chlorophenol (2-CP), by depositing on the glassy carbon electrode (GCE) surface. Finally, the antimicrobial activity of the synthesized CuNPs was tested against different gram-positive and gram-negative bacteria and achieved promising results. It is concluded that the outcomes of this study may provide more insights about the different methods for obtaining highly stable CuNPs colloidal dispersion or solid particles, and open opportunities for new applications. |
|
Supervisor |
: |
Dr. Amna Nisar Khan |
|
Thesis Type |
: |
Master Thesis |
|
Publishing Year |
: |
1439 AH
2018 AD |
|
Added Date |
: |
Thursday, March 15, 2018 |
|
Researchers
| بسماء سليمان الجهني | Al-Johani, Basmaa Sulaiman | Researcher | Master | |
|
Back To Researches Page
|