Pub Date : 2020-10-01DOI: 10.22052/JNS.2020.04.004
B. Abdallah, M. Kakhia, W. Zetoune
ZnS nanowires films on Si (100) substrate have been obtained, using PbS as dopant, via thermal evaporation technique. High resolution transmission electron microscopy (HRTEM) images have confirmed the formation of ZnS nanowires. Energy dispersive X-ray analysis (EDX) has been employed to investigate the element’s contents (mapping and area analysis) and it has confirmed that the ZnS films were stoichiometry. Thickness and morphology of the films were explored from cross section of the films and surface, respectively, using scanning electron microscopy (SEM) and atomic force microscopy (AFM) images. These images confirmed the creation of ZnS nanostructures morphology. The diameter of the obtained nanowires is about 50 nm and their length is several micrometer. Fourier-transform infrared spectroscopy (FTIR), X-Ray Diffraction (XRD), and Photoluminance (PL) have confirmed the hexagonal phase with nanowires structure. UV-Vis characterization has been used to obtain the transparency and the band gap of ZnS films deposited on glass substrate. Also, these verified characterizations allowed to potential optical application in optoelectronic field
{"title":"HRTEM study of ZnS Nanowires films deposited by thermal evaporation","authors":"B. Abdallah, M. Kakhia, W. Zetoune","doi":"10.22052/JNS.2020.04.004","DOIUrl":"https://doi.org/10.22052/JNS.2020.04.004","url":null,"abstract":"ZnS nanowires films on Si (100) substrate have been obtained, using PbS as dopant, via thermal evaporation technique. High resolution transmission electron microscopy (HRTEM) images have confirmed the formation of ZnS nanowires. Energy dispersive X-ray analysis (EDX) has been employed to investigate the element’s contents (mapping and area analysis) and it has confirmed that the ZnS films were stoichiometry. Thickness and morphology of the films were explored from cross section of the films and surface, respectively, using scanning electron microscopy (SEM) and atomic force microscopy (AFM) images. These images confirmed the creation of ZnS nanostructures morphology. The diameter of the obtained nanowires is about 50 nm and their length is several micrometer. Fourier-transform infrared spectroscopy (FTIR), X-Ray Diffraction (XRD), and Photoluminance (PL) have confirmed the hexagonal phase with nanowires structure. UV-Vis characterization has been used to obtain the transparency and the band gap of ZnS films deposited on glass substrate. Also, these verified characterizations allowed to potential optical application in optoelectronic field","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"713-722"},"PeriodicalIF":1.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43828738","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 : 2020-10-01DOI: 10.22052/JNS.2020.04.016
M. A. Golsefidi, H. Khojasteh, C. Azimi, A. Abbasi
In this work, SrMnO3 nanoparticles were successfully synthesized using dimethylglyoxime (DMG) and triethylenepantamine (TEPA) as capping agent and alkaline agent respectively. To achieve the desired sample with high homogeneity and the fine size, various parameters such as capping agent, alkaline agent and temperature of calcination were changed. SrMnO3 nanostructures with different morphologies such as unique sphere-like and hierarchical were successfully prepared. Then on the surface of the optimum sample, silver nanoparticles were doped. The as-synthesized nanostructures were characterized by thermal gravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared (FT-IR) spectroscopy, energy dispersive X-ray microanalysis (EDX) and UV–Vis diffuse reflectance analysis (DRS). The photocatalytic degradation of the rhodamine B, methyl orange, murexide and methylene blue as water pollutants were investigated. According to the results, photocatalytic activity of SrMnO3/Ag nanostructures were better and degradation percent of rhodamine B as a cationic pollutant was more than the other dyes.
{"title":"Grafting of Ag nanoparticles on SrMnO3: Effect of capping agent and alkaline agent on the morphology of SrMnO3 nanostructures for enhancing photocatalytic performance","authors":"M. A. Golsefidi, H. Khojasteh, C. Azimi, A. Abbasi","doi":"10.22052/JNS.2020.04.016","DOIUrl":"https://doi.org/10.22052/JNS.2020.04.016","url":null,"abstract":"In this work, SrMnO3 nanoparticles were successfully synthesized using dimethylglyoxime (DMG) and triethylenepantamine (TEPA) as capping agent and alkaline agent respectively. To achieve the desired sample with high homogeneity and the fine size, various parameters such as capping agent, alkaline agent and temperature of calcination were changed. SrMnO3 nanostructures with different morphologies such as unique sphere-like and hierarchical were successfully prepared. Then on the surface of the optimum sample, silver nanoparticles were doped. The as-synthesized nanostructures were characterized by thermal gravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared (FT-IR) spectroscopy, energy dispersive X-ray microanalysis (EDX) and UV–Vis diffuse reflectance analysis (DRS). The photocatalytic degradation of the rhodamine B, methyl orange, murexide and methylene blue as water pollutants were investigated. According to the results, photocatalytic activity of SrMnO3/Ag nanostructures were better and degradation percent of rhodamine B as a cationic pollutant was more than the other dyes.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"825-837"},"PeriodicalIF":1.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42705132","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 : 2020-10-01DOI: 10.22052/JNS.2020.04.009
G. Nabiyouni, D. Ghanbari
Hydrothermal synthesis of magnetic and photoluminescence CuFe2O4-carbon dots nanocomposite as a sensor for detecting of Hg(II) ionsCarbon quantum dots were prepared by using ethylene-diamine and citric acid materials. Micro-wave was applied for synthesis of copper ferrite, hydrothermal method was used as an effective method for preparation of product with preferential growth. Finally, CuFe2O4 and magnetic copper ferrite-carbon nanocomposite were synthesized. The effects of power and cycles on the morphology and particle size were investigated. Nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, ultra violet-visible (UV-Vis) absorption and photo-luminescence (PL) spectroscopy. The prepared product show suitable photo-luminescence under ultraviolet irradiation. Vibrating sample magnetometer (VSM) shows ferromagnetic property of the both CuFe2O4 and copper ferrite-carbon nanocomposite. The results show that this method for preparation of magnetic and luminescence nanocomposite as a candidate for sensor applications.Keywords: Carbon Quantum Dots; Nanocomposite; Magnetic; Photoluminescence
{"title":"Hydrothermal synthesis of magnetic and photoluminescence CuFe2O4-carbon dots nanocomposite as a sensor for detecting of Hg(II) ions","authors":"G. Nabiyouni, D. Ghanbari","doi":"10.22052/JNS.2020.04.009","DOIUrl":"https://doi.org/10.22052/JNS.2020.04.009","url":null,"abstract":"Hydrothermal synthesis of magnetic and photoluminescence CuFe2O4-carbon dots nanocomposite as a sensor for detecting of Hg(II) ionsCarbon quantum dots were prepared by using ethylene-diamine and citric acid materials. Micro-wave was applied for synthesis of copper ferrite, hydrothermal method was used as an effective method for preparation of product with preferential growth. Finally, CuFe2O4 and magnetic copper ferrite-carbon nanocomposite were synthesized. The effects of power and cycles on the morphology and particle size were investigated. Nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, ultra violet-visible (UV-Vis) absorption and photo-luminescence (PL) spectroscopy. The prepared product show suitable photo-luminescence under ultraviolet irradiation. Vibrating sample magnetometer (VSM) shows ferromagnetic property of the both CuFe2O4 and copper ferrite-carbon nanocomposite. The results show that this method for preparation of magnetic and luminescence nanocomposite as a candidate for sensor applications.Keywords: Carbon Quantum Dots; Nanocomposite; Magnetic; Photoluminescence","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"760-768"},"PeriodicalIF":1.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45020689","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 : 2020-10-01DOI: 10.22052/JNS.2020.04.0008
A. Bamoniri, B. Mirjalili, Mahnaz Mahmoodi Fard Chegeni
Nano-γ-Al2O3/BF3/Fe3O4 magnetic nanoparticles was synthesized and characterized with Fourier Transform Infrared (FT-IR), Powder X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Transmittance Electron Microscopy (TEM), Vibrating Sample Magnetometer (VSM), Brunauer–Emmett–Teller (BET) and Thermal Gravimetry (TGA). Dihydropyrimidinones (DHP) act as antivirals, antibacterial, antifungal, antiinflammatory, antioxidan, anticarcinogen, calcium channel blockers, antihypertensive, anti-cancer and anti-HIV compounds. Nano-γ-Al2O3/BF3/Fe3O4 magnetic nanoparticles as an efficient catalyst was applied for the mild and green one-pot multicomponent synthesis of 3,4-dihydro pyrimidine-2(1H)-ones/thiones under solvent-free conditions. Biginelli reaction proceeds through an aldehyde, β-keto ester and urea or thiourea to the dihydropyrimidinone. Excellent yields of dihydropyrmidinones are gained within a short reaction time. The proposed method offers several advantages such as short reaction time, high efficiency, smooth purification, cleaning reaction, ease of recovery, and reusable catalyst. The structure and purity of these compounds were confirmed using IR and 1H NMR and 13C NMR spectral analysis. Meanwhile, the physical property of products were compared with reported ones.
{"title":"Synthesis of 3,4-dihydropyrimidinones using nano γ-Al2O3/BF3/Fe3O4 as an efficient magnetic nanocatalyst under solvent-free conditions","authors":"A. Bamoniri, B. Mirjalili, Mahnaz Mahmoodi Fard Chegeni","doi":"10.22052/JNS.2020.04.0008","DOIUrl":"https://doi.org/10.22052/JNS.2020.04.0008","url":null,"abstract":"Nano-γ-Al2O3/BF3/Fe3O4 magnetic nanoparticles was synthesized and characterized with Fourier Transform Infrared (FT-IR), Powder X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Transmittance Electron Microscopy (TEM), Vibrating Sample Magnetometer (VSM), Brunauer–Emmett–Teller (BET) and Thermal Gravimetry (TGA). Dihydropyrimidinones (DHP) act as antivirals, antibacterial, antifungal, antiinflammatory, antioxidan, anticarcinogen, calcium channel blockers, antihypertensive, anti-cancer and anti-HIV compounds. Nano-γ-Al2O3/BF3/Fe3O4 magnetic nanoparticles as an efficient catalyst was applied for the mild and green one-pot multicomponent synthesis of 3,4-dihydro pyrimidine-2(1H)-ones/thiones under solvent-free conditions. Biginelli reaction proceeds through an aldehyde, β-keto ester and urea or thiourea to the dihydropyrimidinone. Excellent yields of dihydropyrmidinones are gained within a short reaction time. The proposed method offers several advantages such as short reaction time, high efficiency, smooth purification, cleaning reaction, ease of recovery, and reusable catalyst. The structure and purity of these compounds were confirmed using IR and 1H NMR and 13C NMR spectral analysis. Meanwhile, the physical property of products were compared with reported ones.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"751-759"},"PeriodicalIF":1.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43649445","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 : 2020-10-01DOI: 10.22052/JNS.2020.04.010
N. Thoan, Pham Phi Hung, D. D. Dung, T. Ngoc, L. Bac
In this work, the Ni1-xCuxTiO3 (0 ≤x ≤ 0.1) ilmenite materials were successfully synthesized using the citrate-gel method using nickel nitrate, copper nitrate and titanium (IV) isopropoxide as Ni, Cu, Ti sources and citric acid as complexing reagent. The evolution of the microstructural properties was investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Powder X-ray diffraction pattern confirms the formation of the ilmenite phase for all the samples. The particle size of the prepared samples substantially increased with increase of copper dopant content. The study of phonon vibration by Raman spectroscopy identified a change in structure of NiTiO3 due to Cu dopant. The optical properties with the Cu content was carried out using UV-vis absorption spectroscopy. The reduction of optical band gap from 2.31 eV to 1.99 eV was obtained for undoped NiTiO3 and 10 mol.% Cu dopant in NiTiO3, respectively. To evaluate the photocatalyst properties of NiTiO3, the photocatalytic degradation of congo red under visible light irradiation was carried out. Our results revealed that the copper dopant into NiTiO3 lattice promoted the increase of particle size, decrease of optical bandgap and enhancement of textile photodegradation.
{"title":"Effect of copper dopant on microstructural and optical properties of NiTiO3 ilmenite materials synthesized by citrate method","authors":"N. Thoan, Pham Phi Hung, D. D. Dung, T. Ngoc, L. Bac","doi":"10.22052/JNS.2020.04.010","DOIUrl":"https://doi.org/10.22052/JNS.2020.04.010","url":null,"abstract":"In this work, the Ni1-xCuxTiO3 (0 ≤x ≤ 0.1) ilmenite materials were successfully synthesized using the citrate-gel method using nickel nitrate, copper nitrate and titanium (IV) isopropoxide as Ni, Cu, Ti sources and citric acid as complexing reagent. The evolution of the microstructural properties was investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Powder X-ray diffraction pattern confirms the formation of the ilmenite phase for all the samples. The particle size of the prepared samples substantially increased with increase of copper dopant content. The study of phonon vibration by Raman spectroscopy identified a change in structure of NiTiO3 due to Cu dopant. The optical properties with the Cu content was carried out using UV-vis absorption spectroscopy. The reduction of optical band gap from 2.31 eV to 1.99 eV was obtained for undoped NiTiO3 and 10 mol.% Cu dopant in NiTiO3, respectively. To evaluate the photocatalyst properties of NiTiO3, the photocatalytic degradation of congo red under visible light irradiation was carried out. Our results revealed that the copper dopant into NiTiO3 lattice promoted the increase of particle size, decrease of optical bandgap and enhancement of textile photodegradation.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"769-778"},"PeriodicalIF":1.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43143670","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 : 2020-10-01DOI: 10.22052/JNS.2020.04.019
M. Khalifa, M. H. Jaduaa, A. N. Abd
Gold nanoparticles (AuNPs) were synthesis by electrolysis method as colloidal nanoparticles and deposited on both glass substrates and p-type porous silicon(PSi) to prepare films by using drop casting method to improve the performance of PS/SI solar cell. PS was prepared by electrochemical etching process (ECE) for p-Si wafers. The optical properties of PS and AuNPs were examined. The structural and morphological properties for PSi and gold nanostructure (AuNSs) deposited on glass substrate have been studied by using (XRD) and Atomic Force Microscope (AFM) respectively. TEM testing for AuNPs was investigated. XRD pattern of PSi showed that it had single crystalline structure, whereas for Au nanostructure it was polycrystalline one. AFM confirmed the nanometric size of both AuNSs and PSi it was around 40 nm for AuNSs and 62 nm for PS. The AuNPs diffusion effect on the electrical properties of PS/Si heterojunction was studied . The photovoltaic characteristics of AuNPs/PS/Si/Al Solar cell were reported and the efficiency of solar cell was 15.67% and F.F is 34.31%.
{"title":"Quantum dots gold nanoparticle /porous silicon/silicon for solar cell applications","authors":"M. Khalifa, M. H. Jaduaa, A. N. Abd","doi":"10.22052/JNS.2020.04.019","DOIUrl":"https://doi.org/10.22052/JNS.2020.04.019","url":null,"abstract":"Gold nanoparticles (AuNPs) were synthesis by electrolysis method as colloidal nanoparticles and deposited on both glass substrates and p-type porous silicon(PSi) to prepare films by using drop casting method to improve the performance of PS/SI solar cell. PS was prepared by electrochemical etching process (ECE) for p-Si wafers. The optical properties of PS and AuNPs were examined. The structural and morphological properties for PSi and gold nanostructure (AuNSs) deposited on glass substrate have been studied by using (XRD) and Atomic Force Microscope (AFM) respectively. TEM testing for AuNPs was investigated. XRD pattern of PSi showed that it had single crystalline structure, whereas for Au nanostructure it was polycrystalline one. AFM confirmed the nanometric size of both AuNSs and PSi it was around 40 nm for AuNSs and 62 nm for PS. The AuNPs diffusion effect on the electrical properties of PS/Si heterojunction was studied . The photovoltaic characteristics of AuNPs/PS/Si/Al Solar cell were reported and the efficiency of solar cell was 15.67% and F.F is 34.31%.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"863-870"},"PeriodicalIF":1.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46768078","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 : 2020-10-01DOI: 10.22052/JNS.2020.04.017
Shadi Sheibani, Samira Mandizadeh, Seyed Golam Abbas Mousavi, G. Mostafaii
AbstractIn this study, BaFe2O4–activated clay nanocomposites were successfully synthesized via mechanosynthesis technique for the first time. Structural analysis of the products confirmed the nanoscale formation of nanocomposites. This study focused on adsorption of hydrogen sulfide (H2S) which is a poisonous gas and can be released from sewage sludge. Formation of nanocomposites was verified by scanning electron microscopy (SEM), energy dispersive X-ray (EDS) analysis, Fourier transform infrared (FTIR) and X-ray powder diffraction (XRD). Results showed that different loadings of barium ferrite in the nanocomposite were important for the adsorption rate. Furthermore, adsorption rate of hydrogen sulfide was improved by increasing BaFe2O4- activated clay concentration which was confirmed by statistical results. The highest average of removal efficiency was 92.79±0.90 in the concentration of 300 g.L-1and the loading of 6%. We could recycle BaFe2O4–activated clay nanocomposite 3 times without a significant decrease in activity. Enhanced performance of BaFe2O4–activated clay, compared to other nanocomposites, recommends its application for adsorptive desulfurization.
{"title":"Adsorption of hydrogen sulfide (H2S) by BaFe2O4-activated clay nanocomposite: preparation and evaluation","authors":"Shadi Sheibani, Samira Mandizadeh, Seyed Golam Abbas Mousavi, G. Mostafaii","doi":"10.22052/JNS.2020.04.017","DOIUrl":"https://doi.org/10.22052/JNS.2020.04.017","url":null,"abstract":"AbstractIn this study, BaFe2O4–activated clay nanocomposites were successfully synthesized via mechanosynthesis technique for the first time. Structural analysis of the products confirmed the nanoscale formation of nanocomposites. This study focused on adsorption of hydrogen sulfide (H2S) which is a poisonous gas and can be released from sewage sludge. Formation of nanocomposites was verified by scanning electron microscopy (SEM), energy dispersive X-ray (EDS) analysis, Fourier transform infrared (FTIR) and X-ray powder diffraction (XRD). Results showed that different loadings of barium ferrite in the nanocomposite were important for the adsorption rate. Furthermore, adsorption rate of hydrogen sulfide was improved by increasing BaFe2O4- activated clay concentration which was confirmed by statistical results. The highest average of removal efficiency was 92.79±0.90 in the concentration of 300 g.L-1and the loading of 6%. We could recycle BaFe2O4–activated clay nanocomposite 3 times without a significant decrease in activity. Enhanced performance of BaFe2O4–activated clay, compared to other nanocomposites, recommends its application for adsorptive desulfurization.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"838-845"},"PeriodicalIF":1.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41738250","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 : 2020-10-01DOI: 10.22052/JNS.2020.04.001
Zainab TYAl-Abdullah, A. Al-Shawi, M. N. Aboud, B. A. A. Aziz, Hawraa QM.Al-Furaiji, Iman N Luaibi
Preparation of gold nanoparticles (AuNPs) was done by the addition of tetrachloroaurate (HAuCl4) to dodonaea viscose (L.) leaves watery extract. The procedure was performed in microwave-assisted extraction (MAE). Dodonaea viscose (L.) watery extract functions as a reducing and capping agent to synthesis AuNPs. The gold nanoparticles was identified by the changes in colour from yellow to red –purple, UV-vis spectroscopy, and surface plasmon band at (600 nm). (EDX -FESEM) and TEM instruments were used to investigate the element analysis, distribution of nanoparticles and to calculate their sizes and shapes. Energy dispersive X-ray spectra (EDX) was applied for characterization of gold nanoparticles, the detected percentage of gold nanoparticles was (0.52 wt/wt %). The result from TEM shows the nanoparticles with diameter (6-80 nm) and vary shapes. Furthermore, characterization of nanoparticles was performed before and after the formation of gold nanoparticles using FT-IR. The band appeared at 669 cm-1 indicated the gold nanoparticle formation. The synthesized gold nanoparticles have been used for degradation of 6.6 % methylene blue organic dye pollutant in aqueous solution, and also for degradation of aliphatic hydrocarbons in crude oil. The results of degradation were monitored by GC-MS. The breakage of some organic materials and the appearance of new organic materials with less molecular weight and less abundance were achieved. Through the use of gold nanoparticles, it has been observed that a large number of aliphatic compounds have disappeared, especially those with molecular weights 200-288, the loss in the molecular weight is about 40%.
{"title":"Synthesis and Analytical Characterization of Gold Nanoparticles using Microwave-Assisted Extraction System and Study their Application in Degradation","authors":"Zainab TYAl-Abdullah, A. Al-Shawi, M. N. Aboud, B. A. A. Aziz, Hawraa QM.Al-Furaiji, Iman N Luaibi","doi":"10.22052/JNS.2020.04.001","DOIUrl":"https://doi.org/10.22052/JNS.2020.04.001","url":null,"abstract":"Preparation of gold nanoparticles (AuNPs) was done by the addition of tetrachloroaurate (HAuCl4) to dodonaea viscose (L.) leaves watery extract. The procedure was performed in microwave-assisted extraction (MAE). Dodonaea viscose (L.) watery extract functions as a reducing and capping agent to synthesis AuNPs. The gold nanoparticles was identified by the changes in colour from yellow to red –purple, UV-vis spectroscopy, and surface plasmon band at (600 nm). (EDX -FESEM) and TEM instruments were used to investigate the element analysis, distribution of nanoparticles and to calculate their sizes and shapes. Energy dispersive X-ray spectra (EDX) was applied for characterization of gold nanoparticles, the detected percentage of gold nanoparticles was (0.52 wt/wt %). The result from TEM shows the nanoparticles with diameter (6-80 nm) and vary shapes. Furthermore, characterization of nanoparticles was performed before and after the formation of gold nanoparticles using FT-IR. The band appeared at 669 cm-1 indicated the gold nanoparticle formation. The synthesized gold nanoparticles have been used for degradation of 6.6 % methylene blue organic dye pollutant in aqueous solution, and also for degradation of aliphatic hydrocarbons in crude oil. The results of degradation were monitored by GC-MS. The breakage of some organic materials and the appearance of new organic materials with less molecular weight and less abundance were achieved. Through the use of gold nanoparticles, it has been observed that a large number of aliphatic compounds have disappeared, especially those with molecular weights 200-288, the loss in the molecular weight is about 40%.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"682-690"},"PeriodicalIF":1.4,"publicationDate":"2020-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46647554","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 : 2020-07-01DOI: 10.22052/JNS.2020.03.015
H. Salari, Mehdi Shahedi Asl, M. Padervand, M. Gholami
Fe3O4 magnetic structure was synthesized with co-precipitation method. Surface of magnetic core was modified with hydrophobic BMIM[PF6] ionic liquid. The samples became antibacterial by loading gold, copper and silver nanoparticles and denoted as Fe3O4/IL/X (X=Ag, Au, Cu). X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), thermal gravimetric analysis (TGA), Atomic absorption spectroscopy (AAS), Fourier transform infrared (FTIR) and vibration sample magnetometer (VSM) technics were applied for catalysts characterization, metal concentration analysis and morphology monitoring. Modified nanostructures were used for inactivation of Escherichia coli as the gram negative and Staphylococcus aureus as the gram positive of bacteria. Transmition electron micrscopy (TEM) images indicated that highest bacteria cell walls destruction is achieved when the surface of the magnetic nanostructure is coated with gold particles. Hydrogen bonds between cell wall and ionic liquid and gradual release of metals from Fe3O4/IL surface facilitate the metals arrive to outer layer of bacteria. Minimum inhibitory concentration (MIC) study approved the positive effect of ionic liquid.
{"title":"Magnetic metal nanoparticles decorated ionic liquid with excellent antibacterial activity","authors":"H. Salari, Mehdi Shahedi Asl, M. Padervand, M. Gholami","doi":"10.22052/JNS.2020.03.015","DOIUrl":"https://doi.org/10.22052/JNS.2020.03.015","url":null,"abstract":"Fe3O4 magnetic structure was synthesized with co-precipitation method. Surface of magnetic core was modified with hydrophobic BMIM[PF6] ionic liquid. The samples became antibacterial by loading gold, copper and silver nanoparticles and denoted as Fe3O4/IL/X (X=Ag, Au, Cu). X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), thermal gravimetric analysis (TGA), Atomic absorption spectroscopy (AAS), Fourier transform infrared (FTIR) and vibration sample magnetometer (VSM) technics were applied for catalysts characterization, metal concentration analysis and morphology monitoring. Modified nanostructures were used for inactivation of Escherichia coli as the gram negative and Staphylococcus aureus as the gram positive of bacteria. Transmition electron micrscopy (TEM) images indicated that highest bacteria cell walls destruction is achieved when the surface of the magnetic nanostructure is coated with gold particles. Hydrogen bonds between cell wall and ionic liquid and gradual release of metals from Fe3O4/IL surface facilitate the metals arrive to outer layer of bacteria. Minimum inhibitory concentration (MIC) study approved the positive effect of ionic liquid.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"613-623"},"PeriodicalIF":1.4,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41395333","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 : 2020-07-01DOI: 10.22052/JNS.2020.03.008
A. Abbasi, Amir Homayoun Keihan, M. A. Golsefidi, M. Rahimi‐Nasrabadi, H. Khojasteh
Ferrite chromite (FeCr2O4) powders have been synthesized by a hydrothermal method using various alkaline agents and capping agent. For the first time, nanostructured Ferrite chromite was synthesized with utilizing tetraethylenepantamine as a new alkaline agent. The SDS, PVP and PEG as stabilization agent and capping agent in presence of TEPA as alkaline agent were employed to prepare of the Ferrite chromite. The structural character of as-synthesized powders was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray microanalysis (EDX). The results indicate that the as-obtained powders are pure. The electronic properties of as-synthesized powders was characterized by UV–Vis diffuse reflectance analysis (DRS), which shows the as-obtained sample has a significant absorption in the UV region. The photocatalytic degradation of the rhodamine B, methyl orange, murexide and methylene blue as water pollutants were investigated. According to the results, photocatalytic activity of FeCr2O4/Ag nanostructures were better than of other samples and degradation percent of rhodamine B as a cationic pollutant was more than the other dyes.
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