The separation and preconcentration of copper(II), lead(II), and cadmium(II) ions on magnetic gra... more The separation and preconcentration of copper(II), lead(II), and cadmium(II) ions on magnetic graphene oxide (MGO) by solid-phase extraction was carried out. Quantitative recovery was obtained by adsorption of analytes on MGO at pH 6 and elution of 3 M HNO 3 in 10% acetone. To optimize the presented method, the effects of various parameters—including pH, eluent conditions, and vortex time—were examined. Matrix effects were also investigated. Mean recoveries of the analytes were between 95 and 105%. The proposed method was validated by applying it to certified reference materials. Addition and recovery tests were also performed. The method was applied to verify the analyte content of several water and food samples.
Cement kiln dust (CKD) is one of the main by-products of the cement industry and it has a dangero... more Cement kiln dust (CKD) is one of the main by-products of the cement industry and it has a dangerous environmental effect. Many trials were taken to recycle it. This current research intended to study the effect of adding the particles of Nano-silica to the cement-kiln dust to improve the mechanical properties of cement mortar. Through an experimental program consisting of five groups of cement mortar, each group contains three mixes. The first group is to determine the effect of adding cement kiln dust to the Portland cement as a replacement by weight of cement. The substitution percentages were (10%, 20%, and 30%). The second one showing the effect of addition of Nano-silica individually on pure cement with different percentage (2%, 4%, and 6%) as a replacement by weight of cement. The other three groups clarified the influence of combination between CKD, Portland cement and Nano-silica. The substitution percentage of CKD was (10%, 20%, and 30%) of cement and The Nano-silica was added to all the pervious mixes with different percentage (2%, 4%, and 6%) to enhance the mechanical properties of composite. The experimental results indicated that the Nano-silica enhanced the mechanical properties of cement-CKD to resemble mixed cement as the effective dispersion of nano-particles is essential to obtain composite materials with improved performance.
Multiwall carbon nanotubes MWCNTs were synthesized then decorated with ZnO. The decorated ZnO was... more Multiwall carbon nanotubes MWCNTs were synthesized then decorated with ZnO. The decorated ZnO was grown on the surface of MWCNTs via simple wet chemical route. The prepared MWCNTs/ZnO composite was characterized by X-ray diffraction, EDS, HRTEM, FTIR as well as thermal analysis. Zinc oxide with about 30 nm as confirmed by HRTEM and XRD could be described as wurtzite hexagonal crystalline structure. The HRTEM results showed that the MWCNTs were uniformly decorated with ZnO nanoparticles with nearly no agglomeration. The co-operative behavior between MWCNTs and ZnO gives rise to the production of advanced functional materials with a wide range of applications.
Nano titanium dioxide TiO2was synthesized using hydrolysis method then subjected to several chara... more Nano titanium dioxide TiO2was synthesized using hydrolysis method then subjected to several characterizations. XRD revealed that the as-prepared sample is pure anatase phase and after calcinations at 500C for 3 h the crystallinity has increased. The crystallite size calculated by Debye–Scherrer’s formula is 8 nm. The HRTEM image shows an average size of about 9 nm, which is close to the XRD calculation from Scherrer’s formula. PM3 semiempirical quantum mechanical calculations were conducted to present the electronic as well as thermal properties for TiO2. FTIR spectra between 800 and 400 cm 1 are the verification for the lattice vibrations of anatase TiO2. The photo catalytic degradation of methylene blue (MB) was tested by the prepared nano TiO2. Results indicate that, the maximum degradation efficiency reached 94.4% after 120 min of UV irradiation. This increase in the degradation efficiency of TiO2 could be attributed to the reduction in particle size that enhanced the crystallinity as a result of heat treatment
Chemical vapor deposition (CVD) was optimized in order to prepare multi-wall carbon nanotubes (MW... more Chemical vapor deposition (CVD) was optimized in order to prepare multi-wall carbon nanotubes (MWCNTs). Preparation of MWCNTs was achieved by the help of ferrocene as a catalyst with continuous flow of xylene. Morphology and structure of as grown and purified MWCNTs were characterized by Scanning Electron Microscope (SEM) and High-Resolution Transmission Electron Microscope (HRTEM). Energy Dispersive X-ray (EDX) spectra for the as grown MWCNTs confirm that the deposits are carbonaceous materials. XRD pattern of purified sample indicates that the Fe peaks at 44.6 and 50.9 have been decreased. This confirms that purification process is effectively reducing Fe component. Further qualitative information on the purification process are indicated and confirmed by the thermal analysis measurements. Finally, FTIR studies have been performed for the identification of the functional group attached on the surface of the MWCNTs. Collecting these results revealed that the optimized CVD is suitable for the production of MWCNTs.
TiO3
is an important structure acting as sensor together with the help of some metal and/or metal... more TiO3 is an important structure acting as sensor together with the help of some metal and/or metaloxides. The present computational work presents the applications of TiO3 as sensor for halides. Accordingly, semiemperical calculations at PM5 level as well as D-Gauss at B88LYP/DZVP level were utilized to calculate both physical and thermal parameters of TiO3and TiO3interacted with two halide atoms namely TiO3-2X (where X=F, Cl, Br and I) respectively. Results indicate that TiO3 could interact through hydrogen bonding forming complex with the studied halides, also there are physical interaction between TiO3 and halides. In this case, halides prefer to form weak interaction than complex with TiO3 surface through oxygen with lower energy and higher reactivity. This finding indicates that TiO3 could be used as a sensor for halides
This paper presents an experimental investigation into the residual strength and mechanical prope... more This paper presents an experimental investigation into the residual strength and mechanical properties of corroded reinforcing bare bars. An attempt has been made to describe firstly the impressed current technique which is commonly used for accelerating reinforcement corrosion. The study compared between two methods of repairing the corroded steel bar, the first one which mostly used by painting the half surface area of corroded bar; and the another one by coating the full surface area of corroded bar. The experimental results show that, the corrosion process alters the external surface of steel bar due to pitting, the residual cross-section of the corroded bar is no longer round and varies considerably along its circumference and its length so the residual diameter is better defined by loss of weight. The rate of corrosion has been calculated by two terms, the term of mass loss rate (MR) and the term of penetration rate (CR). The mass loss rate decreased for fully coated bars by 1.7–2 times than half coated bars showing the importance of fully coating bars in corrosion repair. Finally, the reliability of using the galvanostatic method in research work was represented by comparing between the real time and the accelerated time to reach a certain degree of
corrosion
The separation and preconcentration of copper(II), lead(II), and cadmium(II) ions on magnetic gra... more The separation and preconcentration of copper(II), lead(II), and cadmium(II) ions on magnetic graphene oxide (MGO) by solid-phase extraction was carried out. Quantitative recovery was obtained by adsorption of analytes on MGO at pH 6 and elution of 3 M HNO 3 in 10% acetone. To optimize the presented method, the effects of various parameters—including pH, eluent conditions, and vortex time—were examined. Matrix effects were also investigated. Mean recoveries of the analytes were between 95 and 105%. The proposed method was validated by applying it to certified reference materials. Addition and recovery tests were also performed. The method was applied to verify the analyte content of several water and food samples.
Cement kiln dust (CKD) is one of the main by-products of the cement industry and it has a dangero... more Cement kiln dust (CKD) is one of the main by-products of the cement industry and it has a dangerous environmental effect. Many trials were taken to recycle it. This current research intended to study the effect of adding the particles of Nano-silica to the cement-kiln dust to improve the mechanical properties of cement mortar. Through an experimental program consisting of five groups of cement mortar, each group contains three mixes. The first group is to determine the effect of adding cement kiln dust to the Portland cement as a replacement by weight of cement. The substitution percentages were (10%, 20%, and 30%). The second one showing the effect of addition of Nano-silica individually on pure cement with different percentage (2%, 4%, and 6%) as a replacement by weight of cement. The other three groups clarified the influence of combination between CKD, Portland cement and Nano-silica. The substitution percentage of CKD was (10%, 20%, and 30%) of cement and The Nano-silica was added to all the pervious mixes with different percentage (2%, 4%, and 6%) to enhance the mechanical properties of composite. The experimental results indicated that the Nano-silica enhanced the mechanical properties of cement-CKD to resemble mixed cement as the effective dispersion of nano-particles is essential to obtain composite materials with improved performance.
Multiwall carbon nanotubes MWCNTs were synthesized then decorated with ZnO. The decorated ZnO was... more Multiwall carbon nanotubes MWCNTs were synthesized then decorated with ZnO. The decorated ZnO was grown on the surface of MWCNTs via simple wet chemical route. The prepared MWCNTs/ZnO composite was characterized by X-ray diffraction, EDS, HRTEM, FTIR as well as thermal analysis. Zinc oxide with about 30 nm as confirmed by HRTEM and XRD could be described as wurtzite hexagonal crystalline structure. The HRTEM results showed that the MWCNTs were uniformly decorated with ZnO nanoparticles with nearly no agglomeration. The co-operative behavior between MWCNTs and ZnO gives rise to the production of advanced functional materials with a wide range of applications.
Nano titanium dioxide TiO2was synthesized using hydrolysis method then subjected to several chara... more Nano titanium dioxide TiO2was synthesized using hydrolysis method then subjected to several characterizations. XRD revealed that the as-prepared sample is pure anatase phase and after calcinations at 500C for 3 h the crystallinity has increased. The crystallite size calculated by Debye–Scherrer’s formula is 8 nm. The HRTEM image shows an average size of about 9 nm, which is close to the XRD calculation from Scherrer’s formula. PM3 semiempirical quantum mechanical calculations were conducted to present the electronic as well as thermal properties for TiO2. FTIR spectra between 800 and 400 cm 1 are the verification for the lattice vibrations of anatase TiO2. The photo catalytic degradation of methylene blue (MB) was tested by the prepared nano TiO2. Results indicate that, the maximum degradation efficiency reached 94.4% after 120 min of UV irradiation. This increase in the degradation efficiency of TiO2 could be attributed to the reduction in particle size that enhanced the crystallinity as a result of heat treatment
Chemical vapor deposition (CVD) was optimized in order to prepare multi-wall carbon nanotubes (MW... more Chemical vapor deposition (CVD) was optimized in order to prepare multi-wall carbon nanotubes (MWCNTs). Preparation of MWCNTs was achieved by the help of ferrocene as a catalyst with continuous flow of xylene. Morphology and structure of as grown and purified MWCNTs were characterized by Scanning Electron Microscope (SEM) and High-Resolution Transmission Electron Microscope (HRTEM). Energy Dispersive X-ray (EDX) spectra for the as grown MWCNTs confirm that the deposits are carbonaceous materials. XRD pattern of purified sample indicates that the Fe peaks at 44.6 and 50.9 have been decreased. This confirms that purification process is effectively reducing Fe component. Further qualitative information on the purification process are indicated and confirmed by the thermal analysis measurements. Finally, FTIR studies have been performed for the identification of the functional group attached on the surface of the MWCNTs. Collecting these results revealed that the optimized CVD is suitable for the production of MWCNTs.
TiO3
is an important structure acting as sensor together with the help of some metal and/or metal... more TiO3 is an important structure acting as sensor together with the help of some metal and/or metaloxides. The present computational work presents the applications of TiO3 as sensor for halides. Accordingly, semiemperical calculations at PM5 level as well as D-Gauss at B88LYP/DZVP level were utilized to calculate both physical and thermal parameters of TiO3and TiO3interacted with two halide atoms namely TiO3-2X (where X=F, Cl, Br and I) respectively. Results indicate that TiO3 could interact through hydrogen bonding forming complex with the studied halides, also there are physical interaction between TiO3 and halides. In this case, halides prefer to form weak interaction than complex with TiO3 surface through oxygen with lower energy and higher reactivity. This finding indicates that TiO3 could be used as a sensor for halides
This paper presents an experimental investigation into the residual strength and mechanical prope... more This paper presents an experimental investigation into the residual strength and mechanical properties of corroded reinforcing bare bars. An attempt has been made to describe firstly the impressed current technique which is commonly used for accelerating reinforcement corrosion. The study compared between two methods of repairing the corroded steel bar, the first one which mostly used by painting the half surface area of corroded bar; and the another one by coating the full surface area of corroded bar. The experimental results show that, the corrosion process alters the external surface of steel bar due to pitting, the residual cross-section of the corroded bar is no longer round and varies considerably along its circumference and its length so the residual diameter is better defined by loss of weight. The rate of corrosion has been calculated by two terms, the term of mass loss rate (MR) and the term of penetration rate (CR). The mass loss rate decreased for fully coated bars by 1.7–2 times than half coated bars showing the importance of fully coating bars in corrosion repair. Finally, the reliability of using the galvanostatic method in research work was represented by comparing between the real time and the accelerated time to reach a certain degree of
corrosion
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Papers by Mohamed Morsy
on the surface of MWCNTs via simple wet chemical route. The prepared MWCNTs/ZnO composite was
characterized by X-ray diffraction, EDS, HRTEM, FTIR as well as thermal analysis. Zinc oxide with about 30 nm
as confirmed by HRTEM and XRD could be described as wurtzite hexagonal crystalline structure. The HRTEM
results showed that the MWCNTs were uniformly decorated with ZnO nanoparticles with nearly no agglomeration.
The co-operative behavior between MWCNTs and ZnO gives rise to the production of advanced functional materials
with a wide range of applications.
1
are the verification for the lattice vibrations of anatase TiO2. The photo catalytic degradation of methylene blue (MB) was tested by the prepared nano TiO2. Results indicate that, the maximum degradation efficiency reached 94.4% after 120 min of UV irradiation. This increase in the degradation efficiency of TiO2 could be attributed to the reduction in particle size that enhanced the crystallinity as a result of heat treatment
attached on the surface of the MWCNTs. Collecting these results revealed that the optimized CVD is suitable for the production of MWCNTs.
is an important structure acting as sensor together with the help of some metal and/or metaloxides. The present computational work presents the applications of TiO3
as sensor for halides.
Accordingly, semiemperical calculations at PM5 level as well as D-Gauss at B88LYP/DZVP level were utilized to calculate both physical and thermal parameters of TiO3and TiO3interacted with two halide atoms namely TiO3-2X (where X=F, Cl, Br and I) respectively. Results indicate that TiO3 could interact through hydrogen bonding forming complex with the studied halides, also there are physical interaction between TiO3 and halides.
In this case, halides prefer to form weak interaction than complex with TiO3 surface through oxygen with lower energy and higher reactivity. This finding indicates that TiO3 could be used as a sensor for halides
1 by Mohamed Morsy
corrosion
on the surface of MWCNTs via simple wet chemical route. The prepared MWCNTs/ZnO composite was
characterized by X-ray diffraction, EDS, HRTEM, FTIR as well as thermal analysis. Zinc oxide with about 30 nm
as confirmed by HRTEM and XRD could be described as wurtzite hexagonal crystalline structure. The HRTEM
results showed that the MWCNTs were uniformly decorated with ZnO nanoparticles with nearly no agglomeration.
The co-operative behavior between MWCNTs and ZnO gives rise to the production of advanced functional materials
with a wide range of applications.
1
are the verification for the lattice vibrations of anatase TiO2. The photo catalytic degradation of methylene blue (MB) was tested by the prepared nano TiO2. Results indicate that, the maximum degradation efficiency reached 94.4% after 120 min of UV irradiation. This increase in the degradation efficiency of TiO2 could be attributed to the reduction in particle size that enhanced the crystallinity as a result of heat treatment
attached on the surface of the MWCNTs. Collecting these results revealed that the optimized CVD is suitable for the production of MWCNTs.
is an important structure acting as sensor together with the help of some metal and/or metaloxides. The present computational work presents the applications of TiO3
as sensor for halides.
Accordingly, semiemperical calculations at PM5 level as well as D-Gauss at B88LYP/DZVP level were utilized to calculate both physical and thermal parameters of TiO3and TiO3interacted with two halide atoms namely TiO3-2X (where X=F, Cl, Br and I) respectively. Results indicate that TiO3 could interact through hydrogen bonding forming complex with the studied halides, also there are physical interaction between TiO3 and halides.
In this case, halides prefer to form weak interaction than complex with TiO3 surface through oxygen with lower energy and higher reactivity. This finding indicates that TiO3 could be used as a sensor for halides
corrosion