Pub Date : 2019-04-16DOI: 10.26655/AJNANOMAT.2019.4.5
G. Allaedini, S. M. Tasirin
There has been an increase in carbon nanotubes (CNT) uses in different industries; however, its impact on the environment is still under a vast consideration and investigation. In this research study, the soil with staphylococcus has been exposed to pure TiO2 and TiO2/CNT. Also, the community of the staphylococcus was studied using the scanning electron microscopy (SEM). It has been observed that, the microbial community has decreased tremendously after the titanium oxide was doped with CNT. This study suggests that, the TiO2/CNTs can be a much more effective potential material for altering the microbial community compared with the TiO2. These findings could be useful for creating antibacterial agents for the soil using TiO2/CNTs nano hubrid .Further investigation of the TiO2/CNTs mechanism could prove useful for industrial uses or altering microbial communities.
{"title":"Comparison of TiO2 nanoparticles impact with TiO2/CNTs nano hybrid on microbial community of staphylococcus","authors":"G. Allaedini, S. M. Tasirin","doi":"10.26655/AJNANOMAT.2019.4.5","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.4.5","url":null,"abstract":"There has been an increase in carbon nanotubes (CNT) uses in different industries; however, its impact on the environment is still under a vast consideration and investigation. In this research study, the soil with staphylococcus has been exposed to pure TiO2 and TiO2/CNT. Also, the community of the staphylococcus was studied using the scanning electron microscopy (SEM). It has been observed that, the microbial community has decreased tremendously after the titanium oxide was doped with CNT. This study suggests that, the TiO2/CNTs can be a much more effective potential material for altering the microbial community compared with the TiO2. These findings could be useful for creating antibacterial agents for the soil using TiO2/CNTs nano hubrid .Further investigation of the TiO2/CNTs mechanism could prove useful for industrial uses or altering microbial communities.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78378768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-09DOI: 10.26655/AJNANOMAT.2019.4.4
Mostafa Karami, Maryam Maghsoudi, Maria Merajoddin, A. Zare
In this research study, highly effective preparation of 4H-pyrano[2, 3-c]pyrazoles was discussed. The one-pot multi-component reaction between the malononitrile, arylaldehydes and 3-methyl-1-phenyl-1H-pyrazol-5 (4H)-one using protic acidic ionic liquid N1, N1, N2, N2-tetramethyl-N1, N2-bis (sulfo) ethane-1, 2-diaminium trifluoroacetate ([TMBSED][TFA]2) under the mild and solvent-free conditions have furnished the title compounds with high yields in short times. Additionally, an attractive mechanism considering dual-functionality of the catalyst was proposed ([TMBSED][TFA]2 with acidic and basic sites).
{"title":"Highly effectual synthesis of 4H-pyrano [2, 3-c] pyrazoles using N1, N1, N2, N2-tetramethyl-N1, N2-bis (sulfo) ethane-1, 2-diaminium trifluoroacetate as a dual-functional catalyst","authors":"Mostafa Karami, Maryam Maghsoudi, Maria Merajoddin, A. Zare","doi":"10.26655/AJNANOMAT.2019.4.4","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.4.4","url":null,"abstract":"In this research study, highly effective preparation of 4H-pyrano[2, 3-c]pyrazoles was discussed. The one-pot multi-component reaction between the malononitrile, arylaldehydes and 3-methyl-1-phenyl-1H-pyrazol-5 (4H)-one using protic acidic ionic liquid N1, N1, N2, N2-tetramethyl-N1, N2-bis (sulfo) ethane-1, 2-diaminium trifluoroacetate ([TMBSED][TFA]2) under the mild and solvent-free conditions have furnished the title compounds with high yields in short times. Additionally, an attractive mechanism considering dual-functionality of the catalyst was proposed ([TMBSED][TFA]2 with acidic and basic sites).","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86168813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-09DOI: 10.26655/AJNANOMAT.2019.4.3
M. Sameti
In this research, the interaction of the acrolein (Acr) molecule with the pristine and Ga‒doped boron phosphide nanotube (BPNTs) was investigated using the density functional theory (DFT). The electrical, quantum, thermodynamic properties, natural bond orbital (NBO), reduced density gradient (RDG), atom in molecule (AIM), and molecular electrostatic potential (MEP) for all studied models were calculated and analyzed. The results revealed that the thermodynamic parameters (∆H and ∆G) values for all studied models were negative and favorable in thermodynamic point of view. By doping the Ga atom and adsorbing Acr molecule, the HOMO, LUMO, gap energy, conductivity, and optical properties of the nanotube altered slightly from the original values. Whereas, the global hardness and chemical potential of the Ga-doped increased slightly from pristine state and the activity of system decreased slightly from the original state. In addition, the AIM parameters and RDG results showed that the covalent bonding interaction between Acr and BPNTs was so strong.
{"title":"A DFT, NBO, RDG, MEP and thermodynamic sudy of acrolein interaction with pristine and Ga‒doped boron phosphide nanotube","authors":"M. Sameti","doi":"10.26655/AJNANOMAT.2019.4.3","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.4.3","url":null,"abstract":"In this research, the interaction of the acrolein (Acr) molecule with the pristine and Ga‒doped boron phosphide nanotube (BPNTs) was investigated using the density functional theory (DFT). The electrical, quantum, thermodynamic properties, natural bond orbital (NBO), reduced density gradient (RDG), atom in molecule (AIM), and molecular electrostatic potential (MEP) for all studied models were calculated and analyzed. The results revealed that the thermodynamic parameters (∆H and ∆G) values for all studied models were negative and favorable in thermodynamic point of view. By doping the Ga atom and adsorbing Acr molecule, the HOMO, LUMO, gap energy, conductivity, and optical properties of the nanotube altered slightly from the original values. Whereas, the global hardness and chemical potential of the Ga-doped increased slightly from pristine state and the activity of system decreased slightly from the original state. In addition, the AIM parameters and RDG results showed that the covalent bonding interaction between Acr and BPNTs was so strong.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82623566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-09DOI: 10.26655/AJNANOMAT.2019.4.2
Prabhpreet Kaur, R. Komal
The synthesis of metal nanoparticles through biological approach is an important aspect of biotechnology. The biological method provides a feasible alternative as compared to chemical and physical methods. The synthesis of metal nanoparticles using plant derived materials is an effective method for the production of metal nanoparticles.This work reports the rapid biosynthesis of silver nanoparticles from plant extract Cucurbita pepo. The plant extract was prepared using two different solvents i.e. double distilled water and 70% ethanol by hot percolation method. The sample was subjected to different reaction conditions i.e. pH (3, 7, 9) and temperature (0 °C, r.t., 37 °C, 60 °C, 100°C). The preliminary characterization of nanoparticles was done by using UV-VIS spectrophotometer at different wavelengths on the basis of color of the sample obtained from different solvents. Confirmatory analysis of the synthesized silver nanoparticles were done by energy dispersion X-ray spectrometer (EDS) and transmission electron microscopy (TEM). These biosynthesized silver nanoparticles were used in the evaluation of antimicrobial activity that was done by Minimum Inhibitory concentration method against different pathogenic strains. The detection, analysis of presence of metal ions in the synthesized silver nanoparticles by using UV-VIS spectrophotometer at 630 nm.
{"title":"Synthesis, analysis and application of noble metal nanoparticles by Cucurbita pepo using different solvents","authors":"Prabhpreet Kaur, R. Komal","doi":"10.26655/AJNANOMAT.2019.4.2","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.4.2","url":null,"abstract":"The synthesis of metal nanoparticles through biological approach is an important aspect of biotechnology. The biological method provides a feasible alternative as compared to chemical and physical methods. The synthesis of metal nanoparticles using plant derived materials is an effective method for the production of metal nanoparticles.This work reports the rapid biosynthesis of silver nanoparticles from plant extract Cucurbita pepo. The plant extract was prepared using two different solvents i.e. double distilled water and 70% ethanol by hot percolation method. The sample was subjected to different reaction conditions i.e. pH (3, 7, 9) and temperature (0 °C, r.t., 37 °C, 60 °C, 100°C). The preliminary characterization of nanoparticles was done by using UV-VIS spectrophotometer at different wavelengths on the basis of color of the sample obtained from different solvents. Confirmatory analysis of the synthesized silver nanoparticles were done by energy dispersion X-ray spectrometer (EDS) and transmission electron microscopy (TEM). These biosynthesized silver nanoparticles were used in the evaluation of antimicrobial activity that was done by Minimum Inhibitory concentration method against different pathogenic strains. The detection, analysis of presence of metal ions in the synthesized silver nanoparticles by using UV-VIS spectrophotometer at 630 nm.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91288850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-08DOI: 10.26655/AJNANOMAT.2019.4.1
Sima Dehghani, Maria Merajoddin, A. Zare
Acidic ionic liquid pyridinium-N-sulfonic acid bisulfate ([Py-SO3H][HSO4]) has effectively catalyzed the production of 3, 4-dihydropyrimidin-2 (1H)-ones via the condensation reaction of the arylaldehydes with β-ketoesters and urea under solvent-free conditions. Due to the dual-functionality of [Py-SO3H][HSO4] (bearing acidic and basic sites), it was highly effective and general catalyst for the reaction. Additionally, an attractive mechanism for the dual-functionality of the catalyst was proposed.
{"title":"Highly effective synthesis of 3, 4-dihydropyrimidin-2 (1H)-ones using pyridinium-N-sulfonic acid bisulfate as a dual-functional catalyst","authors":"Sima Dehghani, Maria Merajoddin, A. Zare","doi":"10.26655/AJNANOMAT.2019.4.1","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.4.1","url":null,"abstract":"Acidic ionic liquid pyridinium-N-sulfonic acid bisulfate ([Py-SO3H][HSO4]) has effectively catalyzed the production of 3, 4-dihydropyrimidin-2 (1H)-ones via the condensation reaction of the arylaldehydes with β-ketoesters and urea under solvent-free conditions. Due to the dual-functionality of [Py-SO3H][HSO4] (bearing acidic and basic sites), it was highly effective and general catalyst for the reaction. Additionally, an attractive mechanism for the dual-functionality of the catalyst was proposed.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76326130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-01DOI: 10.26655/AJNANOMAT.2019.3.1
Ahmed Alya'a Jabbar
Electrochemical deposition is a very efficient method for producing many types of modern materials. This method is not expensive and does not have a limit for sample size. In our work, the preparation of Ag and Au nanowires is presented. The obtained nanowires had different diameter and length, which were tunable by template porous material and time of deposition, respectively. The quality of the prepared wires was dependent also on deposition mode. The smallest wires of the diameter around 29 nm were prepared in porous anodic alumina oxide obtained from sulfuric acid. The largest ones, around 44 nm, were produced in oxalic acid. The morphology and surface structure of the AAO films were examined before and after electrodeposition by scanning electron microscopy (SEM), atomic force microscope (AFM), and x-ray diffraction spectroscopy.
{"title":"Synthesis and Characterization of Noble Metal Nanowires by Electrodeposition in Porous Anodic Alumina Membranes","authors":"Ahmed Alya'a Jabbar","doi":"10.26655/AJNANOMAT.2019.3.1","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.3.1","url":null,"abstract":"Electrochemical deposition is a very efficient method for producing many types of modern materials. This method is not expensive and does not have a limit for sample size. In our work, the preparation of Ag and Au nanowires is presented. The obtained nanowires had different diameter and length, which were tunable by template porous material and time of deposition, respectively. The quality of the prepared wires was dependent also on deposition mode. The smallest wires of the diameter around 29 nm were prepared in porous anodic alumina oxide obtained from sulfuric acid. The largest ones, around 44 nm, were produced in oxalic acid. The morphology and surface structure of the AAO films were examined before and after electrodeposition by scanning electron microscopy (SEM), atomic force microscope (AFM), and x-ray diffraction spectroscopy.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90698394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-01DOI: 10.26655/AJNANOMAT.2019.3.6
Susan Khosroyar, A. Arastehnodeh
The present study has focused on the effect of stirring to produce ferric saccharide capsules with alginate coating applying the coacervation method so that we can obtain the best capsules for fortification of hydrated and dehydrated food products. At first, three methods including stirrer, ultra-sonic and sonic bath were compared in order to select the best way of stirring. The experiments results showed that turning was provided by the stirrer method resulted in capsulation with spherical morphology and uniform distribution of surface. In this case the other factors such as the alginate concentration and calcium salt concentration were investigated. After studying the various conditions, it is suggested that the best Capsules were formed in alginate 3% at 500 rpm with concentration of calcium chloride salt 1M. The resulted capsules by this method had a high efficiency and were more stable in hydrated and dehydrated food ingredients network for a long time.
{"title":"Effect of stirring to produce ferric saccharide capsules with alginate coating","authors":"Susan Khosroyar, A. Arastehnodeh","doi":"10.26655/AJNANOMAT.2019.3.6","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.3.6","url":null,"abstract":"The present study has focused on the effect of stirring to produce ferric saccharide capsules with alginate coating applying the coacervation method so that we can obtain the best capsules for fortification of hydrated and dehydrated food products. At first, three methods including stirrer, ultra-sonic and sonic bath were compared in order to select the best way of stirring. The experiments results showed that turning was provided by the stirrer method resulted in capsulation with spherical morphology and uniform distribution of surface. In this case the other factors such as the alginate concentration and calcium salt concentration were investigated. After studying the various conditions, it is suggested that the best Capsules were formed in alginate 3% at 500 rpm with concentration of calcium chloride salt 1M. The resulted capsules by this method had a high efficiency and were more stable in hydrated and dehydrated food ingredients network for a long time.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75790995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-01DOI: 10.26655/AJNANOMAT.2019.3.4
S. A. Halim, E. A. Gomaa, Shymaa E. Rashedb
The electronic structure and spectra of schiff base derivatives compounds are investigated using TD-DFT/B3LYB/6-311G (d, p) level of theory. The results of calculations show that all the studied compounds 1–4 are non-planar, as indicated from the dihedral angles. The electronic absorption spectra of the studied compounds are recorded in the UV-VIS region, in both ethanol (as polar solvent) and dioxane (as non-polar solvent) . Solvent dependence of the band maxima (λmax) and intensities of the observed spectra are explained in terms of blue and red shifts. Electronic configurations contributing to each excited state are identified and the relevant MOs are characterized. The theoretical spectra computed at CAM-B3LYP/6-311G (d, p) in gas phase, ethanol and dioxane nicely reproduce the observed spectra. The natural bond orbital (NBO) analysis were discussed in terms of the extent of delocalization, intermolecular charge transfer and second order perturbation interactions between donor and acceptor MOs. The calculated EHOMO and ELUMO energies of the studied compounds can be used to explain the extent of charge transfer in the molecule and to calculate the global properties; the chemical hardness (η), global softness (S), electrophilicity (ω), and electronegativity (χ). The calculated nonlinear optical parameters (NLO); polarizibilty (α), anisotropy of the polarizibility (Δα) and first order hyperpolarizibility (β) of the studied compounds have been calculated at the same level of theory and compared with the proto type Para-Nitro-Aniline (PNA), show promising optical properties. 3D-plots of the molecular electrostatic potential (MEP) for some of the studied compounds are investigated and analyzed showing the distribution of electronic density of orbital's describing the electrophilic and nucleophilic sites of the selected molecules. The biological activity of the studied compounds was tested against gram positive, gram negative and Fungi. A correlation between energetic, global properties and biological activity were investigated and discussed.
{"title":"TD-DFT Calculations, Electronic Structure, NBO , NLO Analysis, Biological Activity, and Electronic Absorption Spectra of Some Novel Schiff base Derivatives","authors":"S. A. Halim, E. A. Gomaa, Shymaa E. Rashedb","doi":"10.26655/AJNANOMAT.2019.3.4","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.3.4","url":null,"abstract":"The electronic structure and spectra of schiff base derivatives compounds are investigated using TD-DFT/B3LYB/6-311G (d, p) level of theory. The results of calculations show that all the studied compounds 1–4 are non-planar, as indicated from the dihedral angles. The electronic absorption spectra of the studied compounds are recorded in the UV-VIS region, in both ethanol (as polar solvent) and dioxane (as non-polar solvent) . Solvent dependence of the band maxima (λmax) and intensities of the observed spectra are explained in terms of blue and red shifts. Electronic configurations contributing to each excited state are identified and the relevant MOs are characterized. The theoretical spectra computed at CAM-B3LYP/6-311G (d, p) in gas phase, ethanol and dioxane nicely reproduce the observed spectra. The natural bond orbital (NBO) analysis were discussed in terms of the extent of delocalization, intermolecular charge transfer and second order perturbation interactions between donor and acceptor MOs. The calculated EHOMO and ELUMO energies of the studied compounds can be used to explain the extent of charge transfer in the molecule and to calculate the global properties; the chemical hardness (η), global softness (S), electrophilicity (ω), and electronegativity (χ). The calculated nonlinear optical parameters (NLO); polarizibilty (α), anisotropy of the polarizibility (Δα) and first order hyperpolarizibility (β) of the studied compounds have been calculated at the same level of theory and compared with the proto type Para-Nitro-Aniline (PNA), show promising optical properties. 3D-plots of the molecular electrostatic potential (MEP) for some of the studied compounds are investigated and analyzed showing the distribution of electronic density of orbital's describing the electrophilic and nucleophilic sites of the selected molecules. The biological activity of the studied compounds was tested against gram positive, gram negative and Fungi. A correlation between energetic, global properties and biological activity were investigated and discussed.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86807229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-01DOI: 10.26655/AJNANOMAT.2019.3.5
A. D. Khalaji
Mononuclear acyclic cobalt(II) complex [CoL](NO3)2, with the L = 3,3ʹ-dimethoxy-2,2ʹ-(propane-1,3-diyldioxy)dibenzaldehyde was synthesized and used as a precursor for preparation of the Co3O4 nanoparticles. The method was based on thermal decomposition of the cobalt(II) complex at 450 oC for 3 h in air atmosphere. The cobalt oxide nanoparticles were characterized using FT-IR, UV-Vis, XRD, SEM, and TEM techniques. The FT-IR and XRD results revealed that the Co3O4 nanopartcles were pure cubic and single phase. TEM image proved the formation of weakly agglomerated Co3O4 consisted of uniformaly shaped nanoparticles. The average particle size of the obtained Co3O4, derived from transmission electron microscopy data was approximately 17 nm, which is in agreement with that calculated by XRD. In addition, the optical spectrum indicated one direct band gap at 2.3 eV.
{"title":"Synthesis, Characterization and Optical Properties of Co3O4 Nanoparticles","authors":"A. D. Khalaji","doi":"10.26655/AJNANOMAT.2019.3.5","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.3.5","url":null,"abstract":"Mononuclear acyclic cobalt(II) complex [CoL](NO3)2, with the L = 3,3ʹ-dimethoxy-2,2ʹ-(propane-1,3-diyldioxy)dibenzaldehyde was synthesized and used as a precursor for preparation of the Co3O4 nanoparticles. The method was based on thermal decomposition of the cobalt(II) complex at 450 oC for 3 h in air atmosphere. The cobalt oxide nanoparticles were characterized using FT-IR, UV-Vis, XRD, SEM, and TEM techniques. The FT-IR and XRD results revealed that the Co3O4 nanopartcles were pure cubic and single phase. TEM image proved the formation of weakly agglomerated Co3O4 consisted of uniformaly shaped nanoparticles. The average particle size of the obtained Co3O4, derived from transmission electron microscopy data was approximately 17 nm, which is in agreement with that calculated by XRD. In addition, the optical spectrum indicated one direct band gap at 2.3 eV.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77434142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-04-01DOI: 10.26655/AJNANOMAT.2019.3.3
Fadwa M. El-sharief, A. Asweisi, N. Bader
Polyurethane foam was chemically functionalized with β-naphthol to adsorb metal ions (Fe3+, Cu2+, Cr3+, Co2+ and Mn2+), applying the off-line solid phase extraction procedure. The concentrations of the metals have been detemined using the flame atomic absorption spectroscopy (FAAS). Various factors including, the pH of the sample solution and the time of extraction were examined. The interference effects of the additional ions in the solution were studied, metal ions of Na+, K+, Mg2+ and Ca2+ and anions, CO32- and SO42-. The new sorbent was examined for separation of Cu, Mn, Cr, Co and Fe ions. The adsorption of metal ions onto β-Nap-PUF was tested using the Morris-Weber equation. The straight line of the plot qt (adsorbed amounts at time t) vs t in all cases, with low R2 (0.767) in case of Mn, indicates the intra particle transport phenomena. The Lagergren equation was applied for mass action phenomenon. The plots of log(1-F) Vs t for Mn, Cr, and Cu were straight with high R2 0.99, 0.98, and 0.81 respectively, indicates that mass action phenomenon are controlling the mechanism following first order process. The capacity sequence of the sorbent was in the order Mn2+ > Co2+ > Cr3+ > Fe3+> Cu2+.
采用离线固相萃取法，用β-萘酚对聚氨酯泡沫进行化学功能化，吸附金属离子(Fe3+、Cu2+、Cr3+、Co2+和Mn2+)。用火焰原子吸收光谱法(FAAS)测定了金属的浓度。考察了样品溶液的pH值和提取时间等因素。研究了溶液中附加离子Na+、K+、Mg2+、Ca2+等金属离子和阴离子CO32-、SO42-的干扰作用。研究了新型吸附剂对Cu、Mn、Cr、Co和Fe离子的分离效果。利用Morris-Weber方程测试了金属离子在β-Nap-PUF上的吸附。在所有情况下qt(时刻t的吸附量)与t的直线关系，在Mn的情况下R2较低(0.767)，表明粒子内输运现象。拉格伦方程应用于质量作用现象。Mn、Cr和Cu的log(1-F) Vs t曲线呈直线，R2分别为0.99、0.98和0.81，表明质量作用现象在一阶过程中控制机理。吸附剂的容量顺序为Mn2+ > Co2+ > Cr3+ > Fe3+> Cu2+。
{"title":"Separation of Some Metal Ions Using β-Naphthol Modified Polyurethane Foam","authors":"Fadwa M. El-sharief, A. Asweisi, N. Bader","doi":"10.26655/AJNANOMAT.2019.3.3","DOIUrl":"https://doi.org/10.26655/AJNANOMAT.2019.3.3","url":null,"abstract":"Polyurethane foam was chemically functionalized with β-naphthol to adsorb metal ions (Fe3+, Cu2+, Cr3+, Co2+ and Mn2+), applying the off-line solid phase extraction procedure. The concentrations of the metals have been detemined using the flame atomic absorption spectroscopy (FAAS). Various factors including, the pH of the sample solution and the time of extraction were examined. The interference effects of the additional ions in the solution were studied, metal ions of Na+, K+, Mg2+ and Ca2+ and anions, CO32- and SO42-. The new sorbent was examined for separation of Cu, Mn, Cr, Co and Fe ions. The adsorption of metal ions onto β-Nap-PUF was tested using the Morris-Weber equation. The straight line of the plot qt (adsorbed amounts at time t) vs t in all cases, with low R2 (0.767) in case of Mn, indicates the intra particle transport phenomena. The Lagergren equation was applied for mass action phenomenon. The plots of log(1-F) Vs t for Mn, Cr, and Cu were straight with high R2 0.99, 0.98, and 0.81 respectively, indicates that mass action phenomenon are controlling the mechanism following first order process. The capacity sequence of the sorbent was in the order Mn2+ > Co2+ > Cr3+ > Fe3+> Cu2+.","PeriodicalId":8523,"journal":{"name":"Asian Journal of Nanoscience and Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79536708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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