
Rashed RasheedUniversity of Technology · Applied Sciences
Rashed Rasheed
Ph.D. Inorganic Chemistry
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Publications
Publications (80)
The influence of introducing benzothiazole and benzimidazole as a pending groups into the repeating unit of PVC hasbeen studied on the bases of photostability measurements. The photostability of modified polymers were studied bymonitoring the carbonyl Index (ICO), polyene index (Ipo) and hydroxyl index (IOH), all results obtained indicated thatPAA,...
Water pollution has increased in recent years with pharmaceutical pollutants, such as tetracycline pollution. This pollutant has a harmful effect on the environment, water resources, agriculture, and drinking water for humans, animals, and agriculture. This research aims to use some nano oxides (vanadium pentoxide and nickel oxide) as an adsorbent...
Superabsorbent polymers with robust water retention capacity have significant potential for next-generation agricultural amendments to enhance crop productivity. Herein, we report the facile synthesis of superabsorbent polymer (SAP) cross-linked with aluminum chloride (AlCl3) as an inorganic cross-linker. Fourier transform infrared (FTIR) spectrosc...
Carbon nanotubes (CNTs), a type of carbonaceous material, have extremely distinctive qualities in terms of tensile strength, heat stability, electrical conductivity, catalysis, and adsorption. These properties rely on structure, length, and thickness. Carbon nanotube and metal oxide combination have been successfully used over the past few decades...
Creating photocatalytic materials to generate clean energy and for ecological detoxification has been a challenge as far as meeting the worldwide demand for energy and cutting pollution is concerned. Anti-inflammatory medicines and pharmaceutically active chemicals (PhACs) are frequently found in wastewater. Since conventional wastewater treatment...
Nitrite ion, a characteristic pollutant, can be removed from water by reverse osmosis, distillation, or ion exchange resin. In this study, we removed it by using ZnO and CeO2 nanoparticles. First, zinc hydroxide and cerium hydroxide were prepared by the hydrothermal method and heated at 90°C to dry. Second, they were annealed at 400°C to produce na...
The purpose of this work was to develop, characterize and test new low-cost materials suitable for removing methylene blue dye from water and wastewater by adsorption. The solid materials consisted of silica gel powder (SG), silica gel mixed with eggshell powder (SG-ES) and a mixture of silica gel with sand from the western Iraqi desert (SG-SI). Th...
Two nanoparticles, aluminum dioxide (Al2O3) and vanadium pentoxide (V2O5) were prepared by hydrothermal autoclave and reflex methods, respectively. Every nanoparticle was heated at two temperatures (90 °C and 400°C). The structures and surface morphology of these nanoparticles were characterized by FT-IR and UV/Visible measurements, X-ray diffracti...
Different nanoparticles of iron oxides (Fe 2 O 3 and Fe 3 O 4) were prepared by the hydrothermal method. These nanoparticles were heated at 90°C and at 400°C. The morphology and structures of the heated samples were characterized using different measurements such as FT-IR, UV-visible, scanning electron microsco-py (SEM), atomic force microscope (AF...
A high-quality buffer layer serves as one of the most significant issues that influences the efficiency of solar cells. Doping in semiconductors is an important strategy that can be used to control the reaction growth. In this study, the influence of Ag doping on the morphological, optical and electrical properties of CdS thin films have been obtai...
Different iron oxide nanoparticles (Fe3O4 and Fe2O3) were prepared by the sol-gel method (titration). The prepared nanoparticles were heated at 90 and 400°C. The morphology surface and structures were characterized by Fourier Transform Infra-Red (FT-IR) and Ultraviolet/Visible (Uv/Visible) measurements, X-ray diffraction (XRD), Scanning Electron Mi...
Novel superabsorbent polymers (SAPs) were created by solution polymerization at ambient temperature using potassium polyacrylate (KPA), polyvinyl alcohol (PVA), and magnesium chloride as a cross-linking agent with different weights of 0.4, 0.5, 0.6, 0.7, 0.8, and 1 g for KPA and 0.33, 0.44, 0.55, 0.733, and 1.1 g for PVA. Fourier transforms infrare...
Hazardous substances originating from aromatic compounds pose seriously harmful effects on aquatic animals and the environment, which has received the attention for the treatment. This work used Multi-Walled Carbon Nano-Tubes (MWCNTs) modified with vanadium-pentoxide V2O5 nanoparticles and 2wt% of different nanocomposite mixtures to remove methylen...
Multiwalled carbon nanotubes (MWCNTs) were oxidized using a mixture of H2SO4 and HNO3, and the oxidized MWCNTS were decorated with magnetite (Fe3O4). Finally, poly-N-isopropyl acrylamide-co-butyl acrylate (P-NIPAM) was added to obtain P-NIPAM/Fe/MWCNT nanocomposites. The nanosorbents were characterized by various techniques, including X-ray diffrac...
The growing global economy resulted in an incessant increase in transportation and exploitation of oil. Hence, the oil spillage has been considered a serious threat to aquatic and terrestrial ecosystems. Therefore, water purification has been considered a major challenge around the world. There are numerous classical methods available for oil remov...
Indium oxide (In 2 O 3) nanopowders were prepared using hydrothermal method and the nanopowders were further annealed at temperature of 400°C. The synthesized powders were characterized by different methods such as, FT-IR spectrometer, X-ray Diffraction (XRD), spectroscopy of Ultra-violet/visible, Scanning Electron Microscopy (SEM), and the microsc...
This paper deals with an advanced colorimetric method used to determine the catalase mimetic activity of V 2 O 5 nanoparticles by measuring the decrease in potassium permanganate concentration in a mixture containing V 2 O 5 and hydrogen peroxide. The experiments were carried out in batch reactor at room temperature for 3 min at wavelength number o...
In this paper, the application of multiwalled carbon nanotubes (MWCNTs) based on metal oxide nanocomposites as adsorbents for the removal of hydrocarbons such as kerosene from water was investigated. Functionalized MWCNTs were obtained by chemical oxidation using concentrated sulfuric and nitric acids. V2O5, CeO2, and V2O5:CeO2 nanocomposites were...
Vanadium pentoxide and Tin dioxide nanoparticles were prepared by hydrothermal methods to remove methylene blue (MB) and bromothymol blue (BTB) dyes). First the prepared nanoparticles were heated at different temperature (90 o C and 500 o C). Then these nanoparticles were characterized by different methods such as UV/Visible, FT-IR Spectroscopy, X-...
This paper deals with V2O5 nanoparticles adsorbents which were obtained by thermal pretreatment carried out by increasing the temperature between 90 and 750°C. In order to obtain more detailed information on the surface chemistry of the newly prepared nanoparticles, the characterisation was done by X-ray diffraction and scanning electron microscopy...
In this research, multi-walled carbon nanotubes (MWCNTs) were functionalized by oxidation with strong acids HNO3, H2SO4, and H2O2. Then, magnetite/MWCNTs nanocomposites were prepared and polystyrene was added to prepare polystyrene/MWCNTs/magnetite (PS:MWCNTs:Fe) nanocomposites. The magnetic property of the prepared nano-adsorbent PS:MWCNTs:Fe was...
In this study, a nano-adsorbent was prepared for kerosene removal from water. Multiwalled carbon nanotubes (MWCNTs) were functionalized with concentrated HNO3 (nitric acid). Subsequently, Fe3O4 (magnetite) nanoparticles were deposited on the MWCNTs to prepare a magnetite/MWCNTs (Fe-MWCNTs) nanocomposite. Then, polyethylene was added to the Fe-MWCNT...
This study aimed to assess the effect of rice straw biochar application as a soil amendment on the mobility, availability, speciation and plant uptake of Zn, Pb and Cd in contaminated soil. A pot experiment with maize ( Zea mays L.) was conducted using different rates 0, 1, 2, and 5% (w/w) of rice straw biochar. The soil pore water properties; pH,...
Copper oxide (CuO) nanoparticles were prepared by the sol-gel method, by the reaction of copper chloride and ammonium hydroxide as procurers. Nanopowders are annealing at different temperatures (100 °C, 200 °C, and 600 °C) for 120 min and confirmed the monoclinic phase by X-ray diffraction analysis of the metal oxide with lattice parameters a = 4.6...
Indium oxide (In2O3) nanopowders were prepared using hydrothermal method and the nanopowders were further annealed at temperature of 400 °C. The synthesized powders were characterized by different methods such as, FT-IR spectrometer, X-ray Diffraction (XRD), spectroscopy of Ultra-violet/visible, Scanning Electron Microscopy (SEM), and the microscop...
Different nanoparticles zinc oxide (ZnO), and tin dioxide (SnO2) were prepared by different methods (autoclave and sol-gel). The nanoparticles were annealed at different temperatures (90°C and 400°C). The structures and surface morphology were characterized by Uv/Visible and FT-IR measurements, x-ray diffraction (XRD), Atomic Force Microscope (AFM)...
In this research, manganese oxides (MnO2) nanoparticles were prepared by hydrothermal method using KMnO4 as a precursor. The final brown–black precipitate MnO2 nanoparticles as prepared, and annealed at different temperatures (250, 450, and 750 °C) were characterized. The nanoparticles prepared were tested for removal of methylene blue (MB), used a...
This paper deals with an advanced colorimetric method used to determine the catalase mimetic activity of V 2 O 5 nanoparticles by measuring the decrease in potassium permanganate concentration in a mixture containing V 2 O 5 and hydrogen peroxide. The experiments were carried out in batch reactor at room temperature for 3 min at wavelength number o...
A new colorimetric method was used to determine catalase mimic activities of MnO2 nanoparticles against hydrogen peroxide (as substrates), by using a new method (acidic solution of potassium permanganate). Manganese dioxide (MnO2) and iron oxide (Fe2O3) nanoparticles were prepared by a hydrothermal method. We annealed MnO2 at different temperatures...
Chromium oxide (Cr2O3) nanoparticles were prepared by sol-gel method, by the reaction of chromium chloride and ammonium hydroxide as procurers. Nanopowders are annealing at different temperatures (100 °C, 200 °C, and 600 °C) for 120 min and confirmed the rhombohedral structure by X-ray diffractometry analysis of the metal oxide and lattice paramete...
α-MnO2 exhibits an excellent catalytic activity in different chemical reactions, functions as enzyme alternative, as so-called artificial enzyme which is used in different applications such as industrial, environmental and biological applications (antibacterial activity). The current study, reports the synthesis of α-MnO2 and rutile TiO2 nanostruct...
Anew colorimetric method was used to determine catalase mimic activities of manganese dioxide
(MnO2), iron oxide (Fe2O3) nanoparticles were prepared by a hydrothermal method (autoclave), and
its composite. TheMnO2 nanoparticles were annealed at different temperatures (250–700 °C), while
MnO2: Fe2O3 composite in the mole ratio of 3:1 annealed at 400...
MnO2 exhibits an excellent catalytic activity in different chemical reactions, functions as enzyme alternative, as so-called artificial enzyme which is used in different applications such as industrial, environmental and biological applications (antibacterial activity). The current study, reports the synthesis of α-MnO2 and rutile TiO2 nanostructur...
This study aims to develop advanced sorbents for the removal of hydrocarbons from surface waters. The microemulsion
method was implemented to modify the surface structure of multiwalled carbon nanotube
(MWCNTs) by attaching a hydrocarbon tail on its surface. The structural and surface chemistry properties of the
prepared adsorbents were studied by...
The aggregate of the absolute values of the graph eigenvalues is called the energy of a graph. It is used to approximate the total _-electron energy of molecules. Thus, finding a new mechanism to calculate the total energy of some graphs is a challenge; it has received a lot of research attention. We study the eigenvalues of a complete tripartite g...
In this work, some inorganic metal oxides such as titanium dioxide (TiO2), iron oxide (Fe2O3) and
indium oxide (In2O3) nanopowders were prepared by a hydrothermal technique. The TiO2 was mixed
separately with Fe2O3, In2O3 and both mixtures were used to prepare three composite nanopowders
(TiO2–Fe2O3, TiO2–In2O3, and TiO2–Fe2O3–In2O3) at (1:1, 1:1 a...
A study on normal stress in an infinite elastic body with a locally curved carbon nanotube Abstract. The energy of a graph is used to approximate the total π-electron energy of molecules. Thus, finding a new technique that facilitates this task is a challenge that has received increased research attention. This paper introduces the eigenvalues of a...
The energy of a graph is used to approximate the total π-electron energy of molecules. Thus, finding a new technique that facilitates this task is a challenge that has received increased research attention. This paper introduces the eigenvalues of a complete tripartite graph T i,i,n−2i , for n ≥ 4, with respect to the adjacency, Laplacian, and sign...
Manganese dioxide (MnO2) nanopowder has been synthesized by hydrothermal method. MnO2 was annealed at different temperatures (250, 400, 550, 700˚C). The crystal structure and surface morphology of these nanostructures were characterized by X-ray diffraction (XRD), Atomic Force Microscope (AFM) and Scanning Electron Microscopy (SEM). The catalase mi...
A series of ten new Schiff-base manganese (111) complexes have been designed and prepared as SOD and CAT mimetics. The new complexes along with the known Mn-Salen (C1) [EUK-8 a known drug used as slandered against superoxide anion (O2-) (SOD-mimetic activity) and hydrogen peroxide (H2O2) (CAT-mimetic activity)], have been characterized using the su...
In this work In2O3 and Sn-doped ITO nanoparticles were prepared by sol-gel
method and deposited on quartz substrate by dip coating technique at different doping
concentration of (5, 10 and 15%). The samples were annealed at 550 oC at constant
time (60 min). X-ray analysis confirmed the formation of polycrystalline cubic phase
that decreases in crys...
Schiff bases have been synthesized, identified by FTIR and ultraviolet-visible (UVVisible)
spectroscopy. The theoretical calculations of Schiff base were studied
through the optimized structures of the Schiff base ligand was obtained by density
functional theory at the B3LYP/6-31G level. Also total energy, heats of formation,
dipole moment, point g...
In this study, In2O3 was prepared by reaction of indium acetate as precursor. The
physical properties of the film were characterized by XRD, SEM, AFM, UV–visible
thin film and FTIR spectroscopy measurements. The complete vibration analysis
was carried out and the optimized parameters are calculated using DFT (B3LYP)
method with 3-21G basis set for...
Titanium dioxide (TiO2) nanostructures were synthesized via the hydrolysis of TiCl4 in alcohol / water solution/with sodium hydroxide solution in the ice-bath (0-5 ◦C). The particles were char-acterized by using X-ray diffraction technique (XRD), spectroscopy of Ultra Violet-Visible (UV / Visible) and infrared (FT-IR), atomic force microscope (AFM)...
The iron oxide nanoparticles type hematite (α-Fe2O3) have been prepared by Sol-Gel technique using ferric nitrate and sodium bicarbonate as precursors. The products were annealing at (200, 300, 400 and 500°C) and characterized by X-ray diffraction (XRD), atomic force microscopy (AFM), surface morphology by scanning electron microscopy (SEM) and fou...
Tin dioxide (SnO2) thin films were prepared by sol-gel dip coating
technique using SnCl2·2H2O and ammonium hydroxide solution. The
obtained thin film slides have been annealed at different temperature
(200, 400 and 600 °C) in air at constant time (90 min). Structure and
surface morphology of SnO2 thin films were investigated and
characterized by X-...
Titanium dioxide (TiO2) Nano powder has been synthesized by hydrothermal
method. The reaction took place between titanium tetrachloride (TiCI4) and mixture
solution consisted of deionized water and ethanol, in the ratio (3:7) respectively.
Structure and surface morphology of TiO2 Nano powder at different annealing
temperatures in the range 200-800°...
Rutile titanium dioxide (r-TiO 2) Nano powder has been synthesized by hydrothermal method in autoclave. The reaction took place between titanium tetrachloride (TiCI 4) and mixture solution consisted of deionized water and ethanol, in the ratio (3:7) respectively. The product has been dried and annealed at 400°C. The structure, morphology and the pa...
Indium oxide and indium tin oxide composite (ITO) were prepared by sol-gel dip-coating (SGDC) technique. The particles annealed at (200 • C, 400 • C). The structure and surface morphology of particles were characterized by X-ray diffraction (XRD), Atomic Force Microscope (AFM), FT-IR and UV/visible measurements. The XRD and AFM indicate decreasing...
Titanium dioxide (TiO 2) Nano powder has been synthesized by hydrothermal method. The reaction took place between titanium tetrachloride (TiCI 4) and mixture solution consisted of deionized water and ethanol, in the ratio (3:7) respectively. Structure and surface morphology of TiO 2 Nano powder at different annealing temperatures in the range 200-8...
In this study, In2O3 was prepared by Solvothermal technique in autoclave device, which is a simple and inexpensive technique to indicate the best condition. The reaction took place between indium chloride and urea. In(OH)3 as-prepared annealing at 100°C and convert to In2O3 at annealing temperatures 300, 500, 700 °C for 90 min .The physical propert...
Tin dioxide (SnO2) nanocrystalline were prepared by Sol–Gel method from SnCl2·2H2O. The obtained products have been annealed at different temperature (200, 400, 600 °C) and characterized by X-ray diffraction (XRD), atomic force microscope (AFM), scan electronic microscope (SEM) and FTIR spectroscopy measurements. The results indicate that the cryst...
Schiff-base isomers derived from salicylaldehyde and 2,4-diaminophenol has been synthesized and characterized by FTIR and UVvisible spectroscopy. Theoretical calculations of Schiff-base were studied by quantum chemical calculations. The optimized structure of Schiff-base was obtained by density functional theory at B3LYP/6-31G level. Also total ene...
Density functional theory (DFT), using the B3LYP functional was utilized to
study the molecular properties (benzene molecule was a reference) of 1,3,5-
Trihydroxybenzene (THB) compound in order to determine the relationship between
molecular structure and electrophiles substitutions (nitration) efficiencies to get 2-
nitro 1,3,5-Trihydroxybenzene (...
Density functional theory (DFT), using the B3LYP functional was utilized to
study the molecular properties (benzene molecule was a reference) of 1,3,5-
Trihydroxybenzene (THB) compound in order to determine the relationship between
molecular structure and electrophiles substitutions (nitration) efficiencies to get 2-
nitro 1,3,5-Trihydroxybenzene (...
Density functional theory (DFT), using the B3LYP functional was utilized to study the molecular properties (benzene molecule was a reference) of 1,3,5-Trihydroxybenzene (THB) compound in order to determine the relationship between molecular structure and electrophiles substitutions (nitration) efficiencies to get 2-nitro 1,3,5-Trihydroxybenzene (NT...