الفهرس 
Chapter 1: Introduction and literature reviewOnly 14 pages are availabe for public view
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Abstract
The current thesis discusses the green bio-synthesis of metallic nanoparticles with
emphasis on traditionally used Egyptian plants i.e. Capsicum annuum and Sonchus
oleraceus L.
The present research work aims at:-
1. Green biosynthesis of metallic nanoparticles
2. characterization of the formed nanoparticles using different tools such as UV, FTIR,
TEM, SEM, PL, TGA and etc.
3. Investigation of the photocatalytic and antibacterial activity of the formed NPs.
The present study covered the following points:
1st Part: Introduction and literature review
Describes eco-friendly methods for the preparation of biogenic NPs with emphasis on
natural plant extracts that contain many different secondary metabolites and biomolecules,
including flavonoids, alkaloids, terpenoids, phenolic compounds and enzymes. Secondary
metabolites that enable the reduction of metal ions to NPs in eco-friendly one-step synthetic
processes. Green NP synthesis using such extracts often obviates the need for stabilizing
and capping agents, and yields biologically active shape- and size-dependent products.
2nd Part: Experimental work
Here the plant extracts that have been used in the biosynthesis of NPs were listed. The
apparatus used in characterization and photocatalytic application were also described.
3rd part: Results and discussion
Discuss the formation of metallic NPs induced by natural extracts (Capsicum annuum and
Sonchus oleraceus L). C. annuum L (chili) were used for the fabrication of Ag2O NPs. The
Ag2O NPs were subsequently decorated with Degussa P25 to extend their absorption
wavelength towards long-wavelength visible light. The prepared Ag2O NPs were uniform
with an average size of 11.4 nm. The catalyst degraded 98.7% of the model pollutant
methylene blue and catalytic conversion of 100% 2,4-dinitroaniline within 60 seconds. In
addition, the prepared Ag2O@P25 catalyst exhibited superior stability and reusability, and
the hot filtration test proved the heterogeneity of the catalyst.