List of Articles Hematite

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  1 - Studying the Alternations of Iron Ore by Remote Sensing of Kamoo Region (Mimeh, Isfahan)
  jahangir esmaeili Ahmad Khakzad Mehrdad Behzadi Mansour Vothoughi Abedi
  It is one of the prone areas where following the explorations of metal indices such as iron in the northern east of Kamoo district (Maimeh, Isfahan) is located in the in longitude E51,16,58 and latitude N33,40,16. Dividing the structural ones, the studied area has been More

  It is one of the prone areas where following the explorations of metal indices such as iron in the northern east of Kamoo district (Maimeh, Isfahan) is located in the in longitude E51,16,58 and latitude N33,40,16. Dividing the structural ones, the studied area has been located in the central Iran and in Makmaei Uromieh- Dokhtar zone. This range has been located in a scene ETM No. 164 - 37 and ASTER linear bad prediction satellite image No. AST_L1A:002:ASTL1A 0108220733380109011021. Such measured images in different band combinations will be used for extracting the geological structures and types of alterations (iron oxide, Argillite and Carbonate) and for detecting different stones and minerals of the ground, a spectrum range of 1.5 to 2.5 μ is very important. This range includes short to average IR range covering six linear band predictions (SWTR bands). According to results of XRD analysis, Albite, andradite, chlorite, gibbsite and Moscuit minerals and silica alterations were also dissociated. On the other side, to use spectral reflectance curves of such minerals in USGSENVI spectral library for spectral analysis, it is necessary to resample the curves to the spectral range of ASTER. Linear Band Prediction methods, LS-Fit, Matched Filtering and BandRATIO used of ASTER images for all minerals and iron alterations and for iron oxides there were also used visual interpretations and ETM images were used in band combination of RGB:531.  The resalts identified in the remote sensing study in the aera (Kamoo) identide as follows : Alteration of iron (Gotit, Hematit and jarosit and limotit), alteration of argilic (maolinite, mottmoriolotit, ilite and halozite), carbonate (calcite and dolomite) Manuscript profile
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  2 - Identification of hematite and magnetite minerals using spectral data of different detectors (three detectors) and their ability to detect minerals (case study: East Azarbaijan province)
  maryam bayatikhatibi Mahmood Soorgali samaneh bagheri
  According to the geological position and diversity of various events in the northwest of Iran, East Azarbaijan province has a high potential in relation to iron mineralization. The aim of the present study is to identify hematite and magnetite miSnerals in the study are More

  According to the geological position and diversity of various events in the northwest of Iran, East Azarbaijan province has a high potential in relation to iron mineralization. The aim of the present study is to identify hematite and magnetite miSnerals in the study area, which includes a range between the cities of Tabriz, Shabestar, Haris and Warzghan. In this research, the multispectral data of OLI sensor of Landsat 8 satellite, ASTER sensor of TERRA satellite, Sentinel-2 satellite, as well as hyperspectral data of Hyperion sensor in order to monitor hematite and magnetite minerals and existing geological maps were used for validation. Is. In this study, in order to identify hematite and magnetite minerals, multi-spectral spectral data was used and to obtain data, data related to different time spectra of these sensors were used. For all obtained data, pre-processing operations, including Atmospheric and radiometric corrections have been done in the environment of ENVI5.3 software. The methods used in this research include index-based methods (band ratio operation) and spectrum-based methods (SID), MF, SFF, LSU). Considering the geological history of East Azarbaijan province, the results of these two methods represent The presence of two minerals, hematite and magnetite, was within the scope of the study, and the comparison of the results showed that the multi-spectral data of the ASTER sensor has a high ability to distinguish and identify the two studied minerals. Since the access to Hyperion hyperspectral data is limited and also covers a limited area compared to multi-spectral data, it can be concluded that ASTER data has more advantages and efficiency in mineralogical studies than other sources of spectral data Manuscript profile
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  3 - Preparation of Symmetrical Tetraphenyl Porphyrin Metal Complexes and Their Spectroscopic Studies
  S. Khaliq M. Danish M. Yasin R. Asim
  10.22034/jna.2015.1.001
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  4 - Comparative Study of Nanostructured Zr-Fe2O3 and CNT Modified Zr-Fe2O3 Thin Films for Photo Electrochemical Generation of Hydrogen
  Vibhuti Yadav Sadhana Tyagi Devbrat Pundhir Saral Kumar Gupta
  10.22034/jna.2014.03.003
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  5 - The effects of temperature and pH on the shape, size, and color of the synthesized nano-plate shape hematite by hydrothermal method
  Najmeh Motevalizadeh Ardakani Saeid Baghshahi Saba Payrazm Amirtaymour Aliabadizadeh
  By controlling the synthesis conditions, hematite particles with different geometric shapes and different optical and magnetic properties can be obtained. In this study, due to its high potential for the synthesis of a wide range of particles with different shapes and s More

  By controlling the synthesis conditions, hematite particles with different geometric shapes and different optical and magnetic properties can be obtained. In this study, due to its high potential for the synthesis of a wide range of particles with different shapes and sizes, the hydrothermal method was used for the synthesis of hematite. Iron (III) hexahydrate, ethanol, sodium acetate, and polyethylene glycol were used as raw materials. In this study, without using common organic solvents and in contrast with most previous researches that focused on the magnetic properties of hematite, Samples were synthesized at 180 and 250 °C and pHs 5, 7, and 11. The phase composition, particle shape, and optical properties of the particles were investigated by XRD, SEM, FTIR, and DRS methods. Hematite particles synthesized at the temperature of 180 °C at pHs 5, 7, and 11 had particle dimensions 293.47, 95.41, and 83.95 nm and at the temperature of 250 °C at pHs 5, 7, and 11 had particle dimensions 88.29, 73.79, and 59.33 nm respectively. As the pH increased, due to the smaller particle size and thus more light absorption, the color of the hematite powder darkened. By using XRD analysis and Scherer equation, it was found that the pH of the process did not affect the size of the unit cells, and the average size of the unit cells at both synthesis temperatures was 27.8 nm. However, the SEM images showed that by increasing pH the hematite particles became more spherical and smaller. Manuscript profile
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  6 - Synthesis and characterization of Fe2O3/BaFe12O19 nanorods and investigation of their magnetic properties
  محمد جزیره پور هرمزی محمد حسین شمس
  In this paper Fe2O3/BaFe12O19 nanorods were synthesized by a simple low-cost hydrothermal process with large scale production capability. Morphologic characteristics of nanorods such as length, diameter and aspect ratio were controllable. EDTA was used in the synthesis More

  In this paper Fe2O3/BaFe12O19 nanorods were synthesized by a simple low-cost hydrothermal process with large scale production capability. Morphologic characteristics of nanorods such as length, diameter and aspect ratio were controllable. EDTA was used in the synthesis process as the growth control agent. In this investigation the effects of different parameters such as temperature (115, 150 and 180 °C), time (5, 10, 40 h), growth controlling agent (EDTA, PEG400, PEG6000, CA) and basic agent (NaOH and NH3) were also studied. In different conditions different morphologies like spheres with a diameter of 50-100 nm and nanorods with diameters of 50-400 nm and lengths of 1-10 μm were synthesized. Morphological characteristics of the samples were studied by scanning electron microscope (SEM) and magnetic properties were measured by alternative gradient force magnetometer (AGFM). The nanorods of this research could be used for heavy metal ions removal from waste water, catalysts, solar cells and microwave absorbing materials. Manuscript profile
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  7 - Electrochemical deposition of hematite and investigation of its photoelectrochemical properties for water splitting
  Gholamreza Heidari
  Production of hydrogen using photoelectrochemical water splitting is a promising method for production of clean and renewable energy source. Using positive and negative semiconductors respectively as photocathode and photoanode, water can be splitted into hydrogen and o More

  Production of hydrogen using photoelectrochemical water splitting is a promising method for production of clean and renewable energy source. Using positive and negative semiconductors respectively as photocathode and photoanode, water can be splitted into hydrogen and oxygen. In this study, hematite was synthesized using electrochemical deposition. The diffraction pattern obtained using x-ray diffraction showed hematite having rhombohedral crystal structure. Surface morphology obtained by scanning electron microscope showed a two-layer structure, lower layer with cracks and upper layer consisting of particles. Photocurrent density was obtained using linear sweep voltammetry under chopped illumination and it was obtained at 0.6V vs Ag/AgCl as 2.5 μA.cm-2. Nyquist plot of hematite at potentials of 0V and 0.6V was obtained using electrochemical impedance spectroscopy and an equivalent circuit was fitted to EIS data and the value of the parameters was obtained. Also, using Mott-schottky plot, the flat band potential and the carrier density were obtained to be -0.35V vs Ag/AgCl and 8.4×1018 cm-3. Manuscript profile