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Showing 4 results for Iranmanesh

Iranmanesh, Tale Fazel, Hezareh, Majidy,
Volume 27, Issue 3 (10-2019)
Abstract

The Esfordi deposit is located at northeastern Bafq and is one of the well-known magnetite-apatite deposits in the area which consists of ore minerals hosted REE. Among the various ore minerals, apatite is one of the unique minerals because of its significant properties such as providing a budget of elements (especially in the case of REE), stability over widespread temperature and pressure domains and exclusively ionic interchanges as a respond to re-equilibrium with new environment. All of which can fit the apatite as a main source feeding the new mineral nucleation like monazite during a hydrothermal alteration. Based on petrography and geochemistry studies, mineralization of four generation apatite accompanied with dropping of REE amount in each stages and increasing of residual Ca and P in the next generations. In contrast, culminating amount of REE beside Na, F and limited Cl reached in nucleolus monazite and led to the formation of two generation of monazites. On the BSE images of apatite, the depleted areas are associated with micro-channels and micro-pores containing monazite. Consequently dissolution of nucleolus monazites provides a well chance to form the second generation of monazite as bigger grain than the first ones. 
Khoshab, Iranmanesh,
Volume 28, Issue 4 (12-2020)
Abstract

MoS2/Ag2S nanocomposite is synthesized by hydrothermal method without using inert atmosphere from green synthesized Ag nanoparticle. The synthesized samples were characterized and studied by X-Ray Diffraction (XRD), Fourier Transform-Infrared Spectroscopy (FTIR), Scaning Electron Microscope (SEM) and Transmision Electron Microscope (TEM) analysis. The optical properties of the samples were investigated by using UV-Vis absorption spectra. Also the formation of Ag nanoparticles via Sesbania sesban extract is confirmed by UV-Vis spectra. The hexagonal crystal structure of MoS2 and the monoclinic structure of Ag2S nanoparticles was confirmed by the result of X-ray diffraction pattern. SEM and TEM images showed the morphology and loading Ag2S on MoS2 structures. The photocatalytic activity of nanocomposite against of the methyl orange and methylene blue colors was evaluated by UV light. The results showed that the MoS2/Ag2S nanocomposite is a good destructive dye of methyl orange and to some extent methylene blue with UV light.
 
Khorasanipoor, Iranmanesh, Saeednia,
Volume 31, Issue 1 (4-2023)
Abstract

In this study, ZnS/MoS2 nanocomposites were synthesized by hydrothermal and ZnS/MoS2/Fe3O4 nanocomposite by chemical co-precipitation methods. ZnS nanoparticles were synthesized initially and then loaded with MoS2 nanostructure. After that ZnS/MoS2 product was mixed by Fe3O4 nanoparticles and the final product that obtained, was ZnS/MoS2/Fe3O4 nanocomposite. XRD, FTIR, TEM, BET and Raman Analyses were used to identify and characterize the samples. Photoluminescence spectroscopy was employed to investigate the optical properties of both composites. The infrared Fourier transform spectra showed a well developed Zn-S, Fe-O and Mo-S bonds. X-ray diffraction pattern confirmed the presence of cubic structure for ZnS and Fe3O4 and hexagonal structure for MoS2. Electron microscopy images well confirmed the formation of nanostructures. Based on PL spectroscopy, the intensity of the luminescence peak decreased, which could be due to a decreases in the electron-holes recombination percentage of the triplet sample compared to the binary sample. Photocatalytic activity of ZnS/MoS2/Fe3O4 on degradation of methyl orange (MO) and acid brown (AB) dye degradation was investigated using UV radiation. The sample showed good photocatalytic activity and can be easily recycled due to its magnetic properties, which can be used as photocatalyst in other reactions.
Mahboobeh Beigmoradi, Parvaneh Iranmanesh, Samira Saeednia,
Volume 32, Issue 2 (7-2024)
Abstract



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