Razieh Razavi; Moslem Basij; Marzieh Salajegheh
Abstract
Amitraz removal was investigated by synthesized TiO2 from an aqueous solution. For this propose, FT-IR, XRD, UV–Vis, SEM and EDS were used to characterize the synthesized nano adsorbents and to determine the removal process. Batch adsorption studies were conducted to investigate the effect of temperature, ...
Read More
Amitraz removal was investigated by synthesized TiO2 from an aqueous solution. For this propose, FT-IR, XRD, UV–Vis, SEM and EDS were used to characterize the synthesized nano adsorbents and to determine the removal process. Batch adsorption studies were conducted to investigate the effect of temperature, initial Amitraz concentration, adsorbent count and contact time as important adsorption parameters. The maximum equilibrium time was found to be 15 min with 5 mg adsorbent in 35ºC at pH=7 for TiO2. All the adsorption equilibrium data were well fitted to the Freundlich isotherm model with heterogenous, multilayer, temperature depended, irreversible and spontaneously behavior. The ∆H is -4.2×103 kJ and ∆S is 15 J mol-1K-1.
Razieh Razavi; Seyyed Mohammad Ali Hossein; Nabi Poodineh Tamiiz
Abstract
In this research study Polypyrrole nanoparticles were synthesized on the copper surface using the amperometry technique, and their morphology, particle size, and thermal properties were investigated. Titanium dioxide particles were added to the texture of polypyrrole nanoparticles as the filler in order ...
Read More
In this research study Polypyrrole nanoparticles were synthesized on the copper surface using the amperometry technique, and their morphology, particle size, and thermal properties were investigated. Titanium dioxide particles were added to the texture of polypyrrole nanoparticles as the filler in order to increase electron transfer in the active layer of the solar cell. Polypyrrole nanoparticles were electrochemically synthesized in the shortest time possible with an ideal morphology and a particle size of less than 40 nm using a new multi-step amperometry technique. The results of EDAX analysis confirmed the existence of titanium particles in the texture of polypyrrole. The crystal size was determined through XRD analysis. SEM images confirmed the uniform and spherical appearance of polypyrrole nanoparticles with spongy and porous structures. Based on the results, the increase in the efficiency of the prepared solar cell based on polypyrrole/TiO2 nanocomposite coated on the copper surface (compared to common polymeric solar cells) was 39.7%. Application of copper as the conductive metal surface improves the electrical conductivity .
