Nowadays, in the clinical, pharmaceutical, and environmental sectors, the development of facile a... more Nowadays, in the clinical, pharmaceutical, and environmental sectors, the development of facile and sensitive analytical methods and/or innovative devices for the follow-up and detection of antibiotics and pharmaceutical formulations, in general, are urgently needed and still challenging. This work declared three vital applications for broad-spectrum nitrofurantoin (macrofuran) antibiotic detection and quantification: A colorimetric method, a coated paper strip-based nano-lanthanum complex prototype and fabrication of smart electronic color sensor device-based coated paper strips. The colorimetric method showed a significant response upon increasing the concentration of the nitrofurantoin in a range between (1.0–100.0 ng/mL) via a visual color change from orange-yellow to red colors degree with detection and quantification limits of 0.175 and 0.53 ng/mL, respectively, whereas the nano-lanthanum complex coated paper strip prototype showed qualitative on-site sensing for nitrofurantoi...
This work is concerned with the studies of the bioactivities of the prepared Cu-MOF compound and ... more This work is concerned with the studies of the bioactivities of the prepared Cu-MOF compound and its modification with diatomite. This work aims to preparation and characterization of Cu-MOF nano-particles and evaluation against some organisms. Otherwise, the structure of the Cu-MOF was modified and the effects of modification on the bioactivity were investigated. Cu-MOF/diatomite was prepared and their characterizations by using different methods were carried. The characterization by flourier transforms Infrared red (FTIR), X-ray diffraction (XRD), transmission electron microscope (TEM) and thermal degradation analysis (TGA) indicate that Cu-MOF incorporated onto the diatomite unit. The thermogravimetric studies, also showed that as the diatomite particles coated with the organic fragments prevent their thermal decomposition at low temperature. The bioactivity of Cu-MOF/diatomite was studied by using the agar diffusion technique; it is found that incorporated Cu-MOF onto diatomite ...
Conversion of industrial wastes to valuable products has become a global requirement to reduce th... more Conversion of industrial wastes to valuable products has become a global requirement to reduce the pollution of environment. This study intended to utilize the solid waste of calcium hydroxide fouled with gases which produced from smokestacks of glass industry by using low-cost and simple procedure. In the current work, this waste was converted to calcium sulfate by treatment with sulfuric acid for preparation of calcium hydroxyapatite (HAp) nanoparticles. The produced HAp was characterized by X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FTIR) to evaluate the crystalline structure and main functional groups. The thermal stability, the particle size and morphology were studied by thermal gravimetric analysis (TGA), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The obtained results confirmed that the produced HAp is well-crystalline, with main surface functional groups of hydroxyapatite which appeared as rods-like of particle si...
Cotton fibers found large applications especially in the woven and non-woven industrials. The cot... more Cotton fibers found large applications especially in the woven and non-woven industrials. The cotton fibers exhibit good properties but it have main drawback because it is easy and rapid flammable. To overcome on this drawback, several works were done. These works focused on the properties of fibers or treated with flame retardant materials. The present work aimed to study the flammability of fibers in presence of flame retardant materials. A novel flame retardant material was prepared by using simple method. The produced sample contains the Ammonium poly phosphate (APP), montmorillonite (Mt) and Melamine (M). The prepared samples were characterized by using Fourier transforms infrared (FTIR) spectroscopy, Scanning electron microscope (SEM), X-ray diffraction (XRD) and Thermal gravimetric analysis (TGA). Also, the flammability of the treated samples was done by using the limiting oxygen index (LOI). The results of characterization indicated that the flame retardant formula was incor...
Copper- Metal organic framework (Cu-MOF) and melamine/ Cu-MOF (MCu-MOF) samples were prepared by ... more Copper- Metal organic framework (Cu-MOF) and melamine/ Cu-MOF (MCu-MOF) samples were prepared by the hydrothermal process. The produced powder was dried and characterized by using the FTIR, X-ray techniques. The thermal gravimetry (TG) analysis was performed to detect the thermal stability of the product. On other hand, the morphology and the surface area of the powder were carried. The bioactivity of the powder was carried by measuring the inhibition zone diameter around samples in (mm). The results of characterization showed that the formation of Cu-MO and melamine/ Cu-MOF in crystalline state in both samples, the surface area of Cu-MOF is equal to 1350 m2 g-1 while increase to 1410 m2 g-1 by incorporate by melamine into the Cu-MOF. The thermal behavior (TG) of the Cu-MOF showed three sequence stages attributed to the moisture evaporation, degradation of the Cu-MOF and forming the Cu-O as end product respectively. For melamine incorporated to Cu-MOF (MCu-MOF), the TG profile shows...
The main purpose of this work was to boost the surface and adsorption characteristics of diatomit... more The main purpose of this work was to boost the surface and adsorption characteristics of diatomite (D) through chemical modifications with chitosan (DC), chitosan/titanium isopropoxide (DCTi), or chitosan/ graphene oxide (DCGr), respectively. Physicochemical characteristics of the prepared samples were investigated using SEM, TEM, XRD, FTIR, TGA, and porosity measurements. The impact of such modifiers into the D surface on the removal efficiency of chromium (VI) ions and methylene blue dye was studied in an equilibrium mode. Langmuir and Freundlich isotherms were used to analyze the adsorption data. Modifiers considerably enhanced the surface and textural properties of D through insertion of the main surface functional groups of chitosan and graphene oxide together compared to chitosan and titanium isopropoxide together or chitosan alone. In addition, the total surface area and total pore volume parameters of the unmodified D sample were improved greatly from 16.5 m2/g, 0.036 cm3/g ...
In this paper, UiO-66 metal-organic framework (MOF) was prepared by a hydrothermal method and mod... more In this paper, UiO-66 metal-organic framework (MOF) was prepared by a hydrothermal method and modified consequently with melamine (MUiO-66), as so as enhance the adsorption properties of these materials in liquid-phase adsorption. With respect to this, the adsorption of lead and cadmium divalent ions was performed under varying conditions of pH, metal ion concentration, contact time, adsorbent dose and temperature. Morphology, texture properties, functional groups, crystallinity and thermal properties of both MOFs were examined. UiO-66 composed of sphere-like particles and covered by layers of melamine with enhancing in crystallinity and active sites as well as the total surface area increased from 1080 to 1160 m2/g. The modified UiO-66 with melamine (MUiO-66) showed a notable adsorption capacity of 177.5 and 146.6 mg/g for Pb and Cd (II) ions, respectively. Adsorption of both metals fitted well with the pseudo-second-order kinetic and Langmuir models and controlled by a physisorpti...
The aim of this work is recovery the chromium content from the tannery wastewater to decrease the... more The aim of this work is recovery the chromium content from the tannery wastewater to decrease the environmental pollution. Also, benefit the extracted chromium compound by study their electrical behavior to be used as humidity sensor device. The chromium content was extracted as a solid power by using MgO for precipitation. The prepared dry powder was characterized by different process. The results of the characterizations indicate that the chromium content precipitated as MgCr2O4. The efficiency of separation reaches to 99.98%. The crystalline size was calculated by applying Scherer equation, the calculation indicate that the MgCr2O4 formed in nano-sized particles and affected markedly with calcinations. As the calcination temperatures increase from 300 to 900 °C the crystalline size increases from 44.1 to 70.6 nm, this may due to growth the crystals by calcinations. To study the evaluation of MgCr2O4 as relative humidity (RH) sensors, the dried samples were exposed to different hu...
Fire performance of polypropylene (PP) containing different percentages of ammonium polyphosphate... more Fire performance of polypropylene (PP) containing different percentages of ammonium polyphosphate (APP) with montmorillonite (Mt) or treated montmorillonite (MtT) was carried out by using the cone calorimeter test (CCT). Different samples from ammonium polyphosphate and montmorillonite were mixed with 90% polypropylene. The characterization of the prepared samples indicates that there is incorporation between the components of the samples. Heat release rate (HRR), peak heat release rate (PHRR), average heat release rate (Av-HRR), and time to ignition (TTI) of the samples were obtained from the cone calorimeter test. Also, the fire performance index (FPI) and the fire growth rate (FIGRA) were calculated. The interpretation of the curves and the parameters results from the cone calorimeter test which indicates that the addition of montmorillonite to APP increases its action as a flame retardant for PP. Moreover, the samples contain acid treatment montmorillonite showed an increase in ...
Nowadays, in the clinical, pharmaceutical, and environmental sectors, the development of facile a... more Nowadays, in the clinical, pharmaceutical, and environmental sectors, the development of facile and sensitive analytical methods and/or innovative devices for the follow-up and detection of antibiotics and pharmaceutical formulations, in general, are urgently needed and still challenging. This work declared three vital applications for broad-spectrum nitrofurantoin (macrofuran) antibiotic detection and quantification: A colorimetric method, a coated paper strip-based nano-lanthanum complex prototype and fabrication of smart electronic color sensor device-based coated paper strips. The colorimetric method showed a significant response upon increasing the concentration of the nitrofurantoin in a range between (1.0–100.0 ng/mL) via a visual color change from orange-yellow to red colors degree with detection and quantification limits of 0.175 and 0.53 ng/mL, respectively, whereas the nano-lanthanum complex coated paper strip prototype showed qualitative on-site sensing for nitrofurantoi...
This work is concerned with the studies of the bioactivities of the prepared Cu-MOF compound and ... more This work is concerned with the studies of the bioactivities of the prepared Cu-MOF compound and its modification with diatomite. This work aims to preparation and characterization of Cu-MOF nano-particles and evaluation against some organisms. Otherwise, the structure of the Cu-MOF was modified and the effects of modification on the bioactivity were investigated. Cu-MOF/diatomite was prepared and their characterizations by using different methods were carried. The characterization by flourier transforms Infrared red (FTIR), X-ray diffraction (XRD), transmission electron microscope (TEM) and thermal degradation analysis (TGA) indicate that Cu-MOF incorporated onto the diatomite unit. The thermogravimetric studies, also showed that as the diatomite particles coated with the organic fragments prevent their thermal decomposition at low temperature. The bioactivity of Cu-MOF/diatomite was studied by using the agar diffusion technique; it is found that incorporated Cu-MOF onto diatomite ...
Conversion of industrial wastes to valuable products has become a global requirement to reduce th... more Conversion of industrial wastes to valuable products has become a global requirement to reduce the pollution of environment. This study intended to utilize the solid waste of calcium hydroxide fouled with gases which produced from smokestacks of glass industry by using low-cost and simple procedure. In the current work, this waste was converted to calcium sulfate by treatment with sulfuric acid for preparation of calcium hydroxyapatite (HAp) nanoparticles. The produced HAp was characterized by X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FTIR) to evaluate the crystalline structure and main functional groups. The thermal stability, the particle size and morphology were studied by thermal gravimetric analysis (TGA), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The obtained results confirmed that the produced HAp is well-crystalline, with main surface functional groups of hydroxyapatite which appeared as rods-like of particle si...
Cotton fibers found large applications especially in the woven and non-woven industrials. The cot... more Cotton fibers found large applications especially in the woven and non-woven industrials. The cotton fibers exhibit good properties but it have main drawback because it is easy and rapid flammable. To overcome on this drawback, several works were done. These works focused on the properties of fibers or treated with flame retardant materials. The present work aimed to study the flammability of fibers in presence of flame retardant materials. A novel flame retardant material was prepared by using simple method. The produced sample contains the Ammonium poly phosphate (APP), montmorillonite (Mt) and Melamine (M). The prepared samples were characterized by using Fourier transforms infrared (FTIR) spectroscopy, Scanning electron microscope (SEM), X-ray diffraction (XRD) and Thermal gravimetric analysis (TGA). Also, the flammability of the treated samples was done by using the limiting oxygen index (LOI). The results of characterization indicated that the flame retardant formula was incor...
Copper- Metal organic framework (Cu-MOF) and melamine/ Cu-MOF (MCu-MOF) samples were prepared by ... more Copper- Metal organic framework (Cu-MOF) and melamine/ Cu-MOF (MCu-MOF) samples were prepared by the hydrothermal process. The produced powder was dried and characterized by using the FTIR, X-ray techniques. The thermal gravimetry (TG) analysis was performed to detect the thermal stability of the product. On other hand, the morphology and the surface area of the powder were carried. The bioactivity of the powder was carried by measuring the inhibition zone diameter around samples in (mm). The results of characterization showed that the formation of Cu-MO and melamine/ Cu-MOF in crystalline state in both samples, the surface area of Cu-MOF is equal to 1350 m2 g-1 while increase to 1410 m2 g-1 by incorporate by melamine into the Cu-MOF. The thermal behavior (TG) of the Cu-MOF showed three sequence stages attributed to the moisture evaporation, degradation of the Cu-MOF and forming the Cu-O as end product respectively. For melamine incorporated to Cu-MOF (MCu-MOF), the TG profile shows...
The main purpose of this work was to boost the surface and adsorption characteristics of diatomit... more The main purpose of this work was to boost the surface and adsorption characteristics of diatomite (D) through chemical modifications with chitosan (DC), chitosan/titanium isopropoxide (DCTi), or chitosan/ graphene oxide (DCGr), respectively. Physicochemical characteristics of the prepared samples were investigated using SEM, TEM, XRD, FTIR, TGA, and porosity measurements. The impact of such modifiers into the D surface on the removal efficiency of chromium (VI) ions and methylene blue dye was studied in an equilibrium mode. Langmuir and Freundlich isotherms were used to analyze the adsorption data. Modifiers considerably enhanced the surface and textural properties of D through insertion of the main surface functional groups of chitosan and graphene oxide together compared to chitosan and titanium isopropoxide together or chitosan alone. In addition, the total surface area and total pore volume parameters of the unmodified D sample were improved greatly from 16.5 m2/g, 0.036 cm3/g ...
In this paper, UiO-66 metal-organic framework (MOF) was prepared by a hydrothermal method and mod... more In this paper, UiO-66 metal-organic framework (MOF) was prepared by a hydrothermal method and modified consequently with melamine (MUiO-66), as so as enhance the adsorption properties of these materials in liquid-phase adsorption. With respect to this, the adsorption of lead and cadmium divalent ions was performed under varying conditions of pH, metal ion concentration, contact time, adsorbent dose and temperature. Morphology, texture properties, functional groups, crystallinity and thermal properties of both MOFs were examined. UiO-66 composed of sphere-like particles and covered by layers of melamine with enhancing in crystallinity and active sites as well as the total surface area increased from 1080 to 1160 m2/g. The modified UiO-66 with melamine (MUiO-66) showed a notable adsorption capacity of 177.5 and 146.6 mg/g for Pb and Cd (II) ions, respectively. Adsorption of both metals fitted well with the pseudo-second-order kinetic and Langmuir models and controlled by a physisorpti...
The aim of this work is recovery the chromium content from the tannery wastewater to decrease the... more The aim of this work is recovery the chromium content from the tannery wastewater to decrease the environmental pollution. Also, benefit the extracted chromium compound by study their electrical behavior to be used as humidity sensor device. The chromium content was extracted as a solid power by using MgO for precipitation. The prepared dry powder was characterized by different process. The results of the characterizations indicate that the chromium content precipitated as MgCr2O4. The efficiency of separation reaches to 99.98%. The crystalline size was calculated by applying Scherer equation, the calculation indicate that the MgCr2O4 formed in nano-sized particles and affected markedly with calcinations. As the calcination temperatures increase from 300 to 900 °C the crystalline size increases from 44.1 to 70.6 nm, this may due to growth the crystals by calcinations. To study the evaluation of MgCr2O4 as relative humidity (RH) sensors, the dried samples were exposed to different hu...
Fire performance of polypropylene (PP) containing different percentages of ammonium polyphosphate... more Fire performance of polypropylene (PP) containing different percentages of ammonium polyphosphate (APP) with montmorillonite (Mt) or treated montmorillonite (MtT) was carried out by using the cone calorimeter test (CCT). Different samples from ammonium polyphosphate and montmorillonite were mixed with 90% polypropylene. The characterization of the prepared samples indicates that there is incorporation between the components of the samples. Heat release rate (HRR), peak heat release rate (PHRR), average heat release rate (Av-HRR), and time to ignition (TTI) of the samples were obtained from the cone calorimeter test. Also, the fire performance index (FPI) and the fire growth rate (FIGRA) were calculated. The interpretation of the curves and the parameters results from the cone calorimeter test which indicates that the addition of montmorillonite to APP increases its action as a flame retardant for PP. Moreover, the samples contain acid treatment montmorillonite showed an increase in ...
Uploads
Papers by Alaa Salah