Al-Sayed Al-Sherbini

Photocatalytic Decomposition of Trypan Blue Over Nanocomposite Thin Films

The photocatalytic activity of titanium dioxide and gold modified TiO2 (Au/TiO2), supported on polymethylmethacrylate (PMMA) thin film, was evaluated in the photodegradation of Trypan Blue (TB) under sunlight irradiation. The effect of parameters such as the photocatalyst amount and pH on TiO2 photocatalytic activity is investigated. Oxygen flow stream was applied to enhance the decomposition process of TB. The maximum photoactivity was attained using Au/TiO2-PMMA thin film at pH 2.

Photo-oxidation of rhodamine-6-G via TiO 2 and Au/TiO 2 -bound polythene beads

It is very important to improve the efficiency of water detoxification techniques. In this study, TiO2 or gold-TiO2 (Au/TiO2) nanocomposite-bound polythene beads were used for the photo-oxidation of rhodamine 6G (R6G) as a model of water organic pollutants. Simple thermal procedures were employed for anchoring TiO2 or Au/TiO2 nanocomposites to polythene beads. The results revealed that the synthesized Au/TiO2 composites exhibited both considerably higher absorption capability of organic pollutants and better photocatalytic activity for the photo-oxidation of R-6G than pure titania. The better photocatalytic activity of the synthesized Au/TiO2 composites film than that of the pure titania film was attributed to high capacity of light absorption intensity and easy diffusion of absorbed pollutants on the absorption sites to photogenerated oxidizing radicals on the photoactive sites.

Exfoliation of graphene sheets via high energy wet milling of graphite in 2-ethylhexanol and kerosene

Graphical abstract

Shaping and Cellular Uptake of Folate conjugated Gold Nanocomposites

DOI: 10.2174/2468187308666180913113827 Abstract: Gold and Iron Oxide nanoparticles NPs play as nanocarriers for a specific drug delivery and contrast agents. Intercellular uptake of these nanoparticles and targeting to individual cell and sub-cellular compartment is essential. The aim of the current study is to evaluate the intracellular uptake of these NPs to specific tumor cells in vitro conjugated with folic acid with a goal of enhancing the efficiency of specific targeting to tumor cells. We synthesized the nanoparticles by a chemical method and characterized by UVVisible, FTIR, XRD, and TEM. The results revealed the conjugation of Gold and Iron Oxide nanoparticles with folic acid increased the intercellular uptake with high percent compared to nonconjugated nanoparticles.

Laser Induced Ablation Of Gold Nano Particles In Micellar Solution

Gold nanoparticles dipped in cetyltrimethylammonium bromide aqueous micellar solution were prepared by laser‐induced ablation of a gold metal plate. The method proved that the nanoparticles were prepared in cationic as well as anionic surfactant compared to the chemical method, which provided nanoparticles only in cationic micelles. The absorption spectra of gold nanoparticles were similar to that of gold nanoparticles prepared chemically. Transmission electron microscope (TEM) images determined the size and the distribution of the nanoparticles. A clear dependence of the nanoparticles size on the surfactant concentration as well as the wavelength of laser at (1064, 532 nm) and the number of laser shots was observed.