Pub Date : 2020-01-01DOI: 10.22052/JNS.2020.01.020
B. Abdallah, A. Jazmati, F. Nounou
ZnO nanostructure films were deposited by radio frequency (RF) magnetron sputtering on etched silicon (100) substrates using dry Ar/SF6 plasma, at two etching times of 5 min and 30 min, and on non etched silicon surface. Energy dispersive X-ray (EDX) technique was employed to investigate the elements contents for etched substrates as well as ZnO films, where it is found to be stoichiometric. Surface and growth evolution of films were explored by scanning electron microscope (SEM) images and found to have morphological development from spherical forms into nanowires with increasing substrate etching time. 2D atomic force microscope (AFM) images clarify this modification of the morphology and roughness values are deduced. Structural study was investigated using X-ray diffraction (XRD) patterns. The films had (002) preferential orientation with various etching time substrates. Optical characterization illustrated a decrease of reflectance with the morphological modification. Photoresponse measurement has been investigated and correlated with the crystallinity.
{"title":"Morphological, structural and photoresponse characterization of ZnO nanostructure films deposited on plasma etched silicon substrates","authors":"B. Abdallah, A. Jazmati, F. Nounou","doi":"10.22052/JNS.2020.01.020","DOIUrl":"https://doi.org/10.22052/JNS.2020.01.020","url":null,"abstract":"ZnO nanostructure films were deposited by radio frequency (RF) magnetron sputtering on etched silicon (100) substrates using dry Ar/SF6 plasma, at two etching times of 5 min and 30 min, and on non etched silicon surface. Energy dispersive X-ray (EDX) technique was employed to investigate the elements contents for etched substrates as well as ZnO films, where it is found to be stoichiometric. Surface and growth evolution of films were explored by scanning electron microscope (SEM) images and found to have morphological development from spherical forms into nanowires with increasing substrate etching time. 2D atomic force microscope (AFM) images clarify this modification of the morphology and roughness values are deduced. Structural study was investigated using X-ray diffraction (XRD) patterns. The films had (002) preferential orientation with various etching time substrates. Optical characterization illustrated a decrease of reflectance with the morphological modification. Photoresponse measurement has been investigated and correlated with the crystallinity.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"185-197"},"PeriodicalIF":1.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411264","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 : 2020-01-01DOI: 10.22052/JNS.2020.01.018
R. Renukadevi, R. Sundaram, Kaviyarasu Kasinathan
Barium Oxide(BaO) nanoparticles were synthesized by simple co-precipitation method and were investigated by the catalytic activity of synthesized barium oxide nanopaticles was enumerated by epoxidation of styrene. The reaction was carried out and the product was obtained at higher efficiency. Particularly, the photocatalytic efficiency was estimated by degradation of Rhodamine-B (RhB) dye using barium oxide nanoparticles under visible light illumination. The degraded dye concentration decreases nearly to zero at 60 minutes of its contact with photocatalyst. The humidity sensing properties of the material was measured by using DC resistance measurement at room temperature that reveals the sensitivity factor of 1926. Barium oxide nanoparticles shows the response and recovery characteristics of 40s and 110s respectively. The dye started to degrade and the concentration of the dye decreases to almost zero at 1 hour of irradiation that was predicted from the degradation rate which was the plot of C/C0. The degradation efficiency was found to be 98% for 1 hour degradation.The evaluation outline on performancebasis revealed that synthesized barium oxide acts as a promising catalyst,photocatalyst and humidity sensing material were reported in detail.
采用简单共沉淀法合成了氧化钡纳米粒子，并对合成的氧化钡纳米粒子的催化活性进行了研究。进行了反应，得到了效率较高的产物。特别地，利用氧化钡纳米颗粒在可见光照射下降解罗丹明- b (RhB)染料，评估了光催化效率。在与光催化剂接触60分钟后，降解染料的浓度几乎降至零。在室温下，采用直流电阻法测量了材料的湿感性能，得到了1926的灵敏度系数。氧化钡纳米颗粒分别表现出40s和110s的响应和恢复特性。染料开始降解染料的浓度在辐照1小时后下降到几乎为零这是由降解率预测的也就是C/C0图。在1小时的降解过程中，降解效率可达98%。在性能评价的基础上，对合成的氧化钡作为一种很有前途的催化剂、光催化剂和湿度传感材料进行了详细的报道。
{"title":"Barium Oxide nanoparticles with robust catalytic, photocatalytic and humidity sensing properties","authors":"R. Renukadevi, R. Sundaram, Kaviyarasu Kasinathan","doi":"10.22052/JNS.2020.01.018","DOIUrl":"https://doi.org/10.22052/JNS.2020.01.018","url":null,"abstract":"Barium Oxide(BaO) nanoparticles were synthesized by simple co-precipitation method and were investigated by the catalytic activity of synthesized barium oxide nanopaticles was enumerated by epoxidation of styrene. The reaction was carried out and the product was obtained at higher efficiency. Particularly, the photocatalytic efficiency was estimated by degradation of Rhodamine-B (RhB) dye using barium oxide nanoparticles under visible light illumination. The degraded dye concentration decreases nearly to zero at 60 minutes of its contact with photocatalyst. The humidity sensing properties of the material was measured by using DC resistance measurement at room temperature that reveals the sensitivity factor of 1926. Barium oxide nanoparticles shows the response and recovery characteristics of 40s and 110s respectively. The dye started to degrade and the concentration of the dye decreases to almost zero at 1 hour of irradiation that was predicted from the degradation rate which was the plot of C/C0. The degradation efficiency was found to be 98% for 1 hour degradation.The evaluation outline on performancebasis revealed that synthesized barium oxide acts as a promising catalyst,photocatalyst and humidity sensing material were reported in detail.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"167-176"},"PeriodicalIF":1.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411565","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 : 2020-01-01DOI: 10.22052/JNS.2020.01.005
N. Ansari, Zahta Payami
Superparamagnetic few-layer graphene nanocomposites (FLG- NCs) can be used for many technological applications, such as solar cells, batteries, touch panels and supercapacitors. In this work, we applied electrochemical exfoliation method as a simple, one step and economical technique to fabricate FLG- NCs. The fabricated Superparamagnetic FLG- NCs were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), field emission scanning electron microscope (FESEM), energy dispersive spectroscopy (EDS) and vibrating sample magnetometer (VSM). Analysis of XRD pattern shows the formation of graphene iron oxide nanocomposites due to the existence of magnetite (Fe3O4) and graphite picks. Hysteresis curve of the sample represents superparamagnetic effect with saturation magnetization, MS=57.3 emu. g-1. The results of XRD and VSM indicate that the size of ferromagnetic particles reduced to critical size to form into superparamagnetic. FLG- Fe3O4 with high saturation magnetization is very useful in hyperthermia, drug delivery, supercapacitors, removal dye, etc.
{"title":"Synthesis of magnetic graphene-Fe3O4 nanocomposites by electrochemical exfoliation method","authors":"N. Ansari, Zahta Payami","doi":"10.22052/JNS.2020.01.005","DOIUrl":"https://doi.org/10.22052/JNS.2020.01.005","url":null,"abstract":"Superparamagnetic few-layer graphene nanocomposites (FLG- NCs) can be used for many technological applications, such as solar cells, batteries, touch panels and supercapacitors. In this work, we applied electrochemical exfoliation method as a simple, one step and economical technique to fabricate FLG- NCs. The fabricated Superparamagnetic FLG- NCs were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), field emission scanning electron microscope (FESEM), energy dispersive spectroscopy (EDS) and vibrating sample magnetometer (VSM). Analysis of XRD pattern shows the formation of graphene iron oxide nanocomposites due to the existence of magnetite (Fe3O4) and graphite picks. Hysteresis curve of the sample represents superparamagnetic effect with saturation magnetization, MS=57.3 emu. g-1. The results of XRD and VSM indicate that the size of ferromagnetic particles reduced to critical size to form into superparamagnetic. FLG- Fe3O4 with high saturation magnetization is very useful in hyperthermia, drug delivery, supercapacitors, removal dye, etc.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"39-43"},"PeriodicalIF":1.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68410985","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 : 2020-01-01DOI: 10.22052/JNS.2020.01.016
Lihong Wang, Xinxin Xing, N. Chen, Rongjun Zhao, Zidong Wang, Tong Zou, Wang Zhezhe, Yude Wang
W-doped TiO2 with nanoporous structure was synthesized by a one-step low temperature hydrothermal method using TiOSO4 and (NH4)6H2W12O40•xH2O as titanium and tungsten sources. Structure, morphology, specific surface area and chemical state of samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). W-doped nanoporous TiO2 samples were used as sensing materials of indirect-heating sensors and their gas-sensing performances were studied to detect acetone. The experimental results show that 7.5% W-doped nanoporous TiO2 can adsorb more oxygen molecules on the surface and provide large amount of active reaction sites on interface to profit reaction between material and gas molecules. The gas sensor based on 7.5% W-doped nanoporous TiO2 exhibits good gas-sensing performances, including high gas response value, shortened response/recovery time and good reproducibility, which make it a promising candidate in acetone detection. Apart from these, the mechanism related to the advanced properties was also investigated and presented.
{"title":"W-doped nanoporous TiO2 for high performances sensing material toward acetone gas","authors":"Lihong Wang, Xinxin Xing, N. Chen, Rongjun Zhao, Zidong Wang, Tong Zou, Wang Zhezhe, Yude Wang","doi":"10.22052/JNS.2020.01.016","DOIUrl":"https://doi.org/10.22052/JNS.2020.01.016","url":null,"abstract":"W-doped TiO2 with nanoporous structure was synthesized by a one-step low temperature hydrothermal method using TiOSO4 and (NH4)6H2W12O40•xH2O as titanium and tungsten sources. Structure, morphology, specific surface area and chemical state of samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). W-doped nanoporous TiO2 samples were used as sensing materials of indirect-heating sensors and their gas-sensing performances were studied to detect acetone. The experimental results show that 7.5% W-doped nanoporous TiO2 can adsorb more oxygen molecules on the surface and provide large amount of active reaction sites on interface to profit reaction between material and gas molecules. The gas sensor based on 7.5% W-doped nanoporous TiO2 exhibits good gas-sensing performances, including high gas response value, shortened response/recovery time and good reproducibility, which make it a promising candidate in acetone detection. Apart from these, the mechanism related to the advanced properties was also investigated and presented.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"148-156"},"PeriodicalIF":1.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68411343","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 : 2020-01-01DOI: 10.22052/JNS.2020.01.007
Farnaz Hajiyan Pour, M. Behpour, Mehdi Shabani‐Nooshabadi, Y. Jafari
the Sol–gel nanocomposite coatings have been investigated for copper metal as a potential replacement for the hazardous and banned hexavalent chromate conversion coatings. TiO2–CdO nanocomposite thin films were deposited on copper using the sol–gel method. The sol-gel coatings were prepared using a sol obtained by the hydrolysis and condensation of tetra-o-butyl titanate. They were doped with cadmium oxide inhibitor to provide active corrosion protection. The synthesized coatings were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). The anticorrosion performances of TiO2-CdO nanocomposite coatings were investigated in 3.5% NaCl solution by the potentiodynamic polarization technique Tafle and electrochemical impedance spectroscopy (EIS). The potential corrosion increases from -210 mV versus Ag/AgCl (3M) for uncoated copper to -202 mV versus Ag/AgCl (3M) for TiO2-CdO nanocomposite-coated copper electrodes. The results of this study clearly ascertain that the TiO2-CdO nanocomposite has outstanding potential to protect the copper against corrosion in a chloride environment..
研究了金属铜溶胶-凝胶纳米复合涂层作为危险和禁用的六价铬酸盐转化涂层的潜在替代品。采用溶胶-凝胶法制备了TiO2-CdO纳米复合薄膜。采用钛酸四丁酯水解缩聚得到的溶胶制备溶胶-凝胶涂层。它们被掺杂了氧化镉缓蚀剂以提供有效的腐蚀保护。采用x射线衍射(XRD)和原子力显微镜(AFM)对合成的涂层进行了表征。采用动电位极化技术(Tafle)和电化学阻抗谱(EIS)研究了TiO2-CdO纳米复合涂层在3.5% NaCl溶液中的防腐性能。对于未涂覆的铜电极，潜在腐蚀电位从-210 mV vs Ag/AgCl (3M)增加到-202 mV vs Ag/AgCl (3M)。这项研究的结果清楚地确定了TiO2-CdO纳米复合材料在保护铜免受氯化物环境腐蚀方面具有突出的潜力。
{"title":"Investigation of corrosion protection properties of TiO2-CdO nanocomposite coating prepared by sol-gel method on copper","authors":"Farnaz Hajiyan Pour, M. Behpour, Mehdi Shabani‐Nooshabadi, Y. Jafari","doi":"10.22052/JNS.2020.01.007","DOIUrl":"https://doi.org/10.22052/JNS.2020.01.007","url":null,"abstract":"the Sol–gel nanocomposite coatings have been investigated for copper metal as a potential replacement for the hazardous and banned hexavalent chromate conversion coatings. TiO2–CdO nanocomposite thin films were deposited on copper using the sol–gel method. The sol-gel coatings were prepared using a sol obtained by the hydrolysis and condensation of tetra-o-butyl titanate. They were doped with cadmium oxide inhibitor to provide active corrosion protection. The synthesized coatings were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). The anticorrosion performances of TiO2-CdO nanocomposite coatings were investigated in 3.5% NaCl solution by the potentiodynamic polarization technique Tafle and electrochemical impedance spectroscopy (EIS). The potential corrosion increases from -210 mV versus Ag/AgCl (3M) for uncoated copper to -202 mV versus Ag/AgCl (3M) for TiO2-CdO nanocomposite-coated copper electrodes. The results of this study clearly ascertain that the TiO2-CdO nanocomposite has outstanding potential to protect the copper against corrosion in a chloride environment..","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"52-63"},"PeriodicalIF":1.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68410663","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 : 2020-01-01DOI: 10.22052/JNS.2020.01.002
Alireza Hakimyfard, N. Tahmasebi, M. Samimifar, Marzieh Naghizadeh
Nanostructured doped As2Ni3O8 samples were synthesized via facile one step solid state reactions at 850 °C for 8 h using As2O3, Ni(NO3)2.6H2O, Gd2O3, Tb2O3 and Ho2O3 raw materials. The synthesized nanomaterials were characterized by powder X-ray diffraction (PXRD) technique. The rietveld analyses showed that the obtained materials were crystallized well in monoclinic crystal structure with the space group P121/c1. The morphology of the synthesized materials was studied by field emission scanning electron microscope (FESEM). Photocatalytic performance of the as-synthesized sample was investigated for the degradation of pollutant Malachite Green (MG) in aqueous solution under direct visible light irradiation. The light source was a white color fluorescent lamp with the 40 W power and light intensity of 1.34 W/m2 measured by a digital lux meter. The distance between the lamp and the surface of the solution was 50 cm. The degradation yield at the optimized condition (0.1 mL H2O2, 60 mg catalyst and 90 min) was 94 % for pure Ni3As2O8.
以As2O3、Ni(NO3)2.6H2O、Gd2O3、Tb2O3和Ho2O3为原料，在850℃、8h条件下，通过一步固相反应合成了纳米掺杂As2Ni3O8样品。采用粉末x射线衍射(PXRD)技术对合成的纳米材料进行了表征。rietveld分析表明，制备的材料具有良好的单斜晶结构，具有P121/c1空间群。利用场发射扫描电镜(FESEM)研究了合成材料的形貌。研究了合成样品在可见光直接照射下光催化降解水中污染物孔雀石绿(MG)的性能。光源为白色荧光灯，功率为40 W，光强为1.34 W/m2，采用数字勒克斯计测量。灯与溶液表面的距离为50cm。在最佳条件下(0.1 mL H2O2, 60 mg催化剂，90 min)， Ni3As2O8的降解率为94%。
{"title":"Pure and Gd3+, Tb3+ and Ho3+-doped As2Ni3O8: A new visible light induced photocatalyst for the photodegradation of malachite green water pollutant","authors":"Alireza Hakimyfard, N. Tahmasebi, M. Samimifar, Marzieh Naghizadeh","doi":"10.22052/JNS.2020.01.002","DOIUrl":"https://doi.org/10.22052/JNS.2020.01.002","url":null,"abstract":"Nanostructured doped As2Ni3O8 samples were synthesized via facile one step solid state reactions at 850 °C for 8 h using As2O3, Ni(NO3)2.6H2O, Gd2O3, Tb2O3 and Ho2O3 raw materials. The synthesized nanomaterials were characterized by powder X-ray diffraction (PXRD) technique. The rietveld analyses showed that the obtained materials were crystallized well in monoclinic crystal structure with the space group P121/c1. The morphology of the synthesized materials was studied by field emission scanning electron microscope (FESEM). Photocatalytic performance of the as-synthesized sample was investigated for the degradation of pollutant Malachite Green (MG) in aqueous solution under direct visible light irradiation. The light source was a white color fluorescent lamp with the 40 W power and light intensity of 1.34 W/m2 measured by a digital lux meter. The distance between the lamp and the surface of the solution was 50 cm. The degradation yield at the optimized condition (0.1 mL H2O2, 60 mg catalyst and 90 min) was 94 % for pure Ni3As2O8.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"9-19"},"PeriodicalIF":1.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68410687","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 : 2020-01-01DOI: 10.22052/JNS.2020.01.010
K. Hedayati, M. Joulaei, D. Ghanbari
Magnesium ferrite (MgFe2O4) as a core magnetic nanostructure was synthesized via auto combustion method by using grapefruit extract as a biocompatible and cost-effective material. Then flower and star-like PbS were synthesized using thioglycolic acid as a sulfur source without using any chemical template. After that for preparation of magnetic and photocatalyst MgFe2O4-PbS nanocomposites, lead sulfide were coated on the magnetic core by hydrothermal procedure. Morphology of the prepared products was estimated by transmission electron microscopy (TEM), scanning electron microscopy (SEM), also X-ray diffraction (XRD) pattern show purity and phase of the product. Fourier transforms infrared (FT-IR) spectroscopy show vibration modes of the bonds. Vibrating sample magnetometer (VSM) illustrated that magnesium ferrite nanoparticles have a soft magnetic behaviour with 18 emu/g magnetization and coercivity about 90Oe. The photocatalytic behaviour of MgFe2O4-PbS nanocomposites were examined using the degradation of two various azo dyes acid brown and acid violet under visible light irradiation. This magnetic photocatalyst can easily separate from water with an external magnetic field and can be used under solar irradiation.
{"title":"Auto combustion synthesis using grapefruit extract: photocatalyst and magnetic MgFe2O4-PbS nanocomposites","authors":"K. Hedayati, M. Joulaei, D. Ghanbari","doi":"10.22052/JNS.2020.01.010","DOIUrl":"https://doi.org/10.22052/JNS.2020.01.010","url":null,"abstract":"Magnesium ferrite (MgFe2O4) as a core magnetic nanostructure was synthesized via auto combustion method by using grapefruit extract as a biocompatible and cost-effective material. Then flower and star-like PbS were synthesized using thioglycolic acid as a sulfur source without using any chemical template. After that for preparation of magnetic and photocatalyst MgFe2O4-PbS nanocomposites, lead sulfide were coated on the magnetic core by hydrothermal procedure. Morphology of the prepared products was estimated by transmission electron microscopy (TEM), scanning electron microscopy (SEM), also X-ray diffraction (XRD) pattern show purity and phase of the product. Fourier transforms infrared (FT-IR) spectroscopy show vibration modes of the bonds. Vibrating sample magnetometer (VSM) illustrated that magnesium ferrite nanoparticles have a soft magnetic behaviour with 18 emu/g magnetization and coercivity about 90Oe. The photocatalytic behaviour of MgFe2O4-PbS nanocomposites were examined using the degradation of two various azo dyes acid brown and acid violet under visible light irradiation. This magnetic photocatalyst can easily separate from water with an external magnetic field and can be used under solar irradiation.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"10 1","pages":"83-91"},"PeriodicalIF":1.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68410993","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 : 2019-10-01DOI: 10.22052/JNS.2019.04.001
M. T. T. Moghadam, M. Babamoradi, R. Azimirad
Cadmium tungstate (CdWO4) nanorods and CdWO4-reduced graphene oxide (RGO) nanocomposites have been prepared by the hydrothermal method at 140, 160 and 180 oC reaction temperatures. The synthesized samples were characterized by X-ray powder diffraction, scanning electron microscopy (SEM), Fourier transform infrared, photoluminescence spectroscopy and Raman spectroscopy. SEM image showed the pure sample consist of nanorods with 50-100 nm diameter and ~1 µm length. The images of the nanocomposite samples clearly showed existence of CdWO4 nanorods and graphene sheets together. The photocatalytic activities of the as-prepared samples were investigated by degradation of methylene blue under the visible light irradiation. An enhancement in photocatalytic activity was observed with CdWO4-RGO nanocomposites in compare with the pure CdWO4. The effect of reaction temperature on the photocatalytic activity of the prepared nanocomposites was also investigated. The results showed that the CdWO4-RGO sample which prepared at 160 oC has more catalytic activity than the other samples.
{"title":"Effect of hydrothermal reaction temperature on the photocatalytic properties of CdWO4-RGO nanocomposites","authors":"M. T. T. Moghadam, M. Babamoradi, R. Azimirad","doi":"10.22052/JNS.2019.04.001","DOIUrl":"https://doi.org/10.22052/JNS.2019.04.001","url":null,"abstract":"Cadmium tungstate (CdWO4) nanorods and CdWO4-reduced graphene oxide (RGO) nanocomposites have been prepared by the hydrothermal method at 140, 160 and 180 oC reaction temperatures. The synthesized samples were characterized by X-ray powder diffraction, scanning electron microscopy (SEM), Fourier transform infrared, photoluminescence spectroscopy and Raman spectroscopy. SEM image showed the pure sample consist of nanorods with 50-100 nm diameter and ~1 µm length. The images of the nanocomposite samples clearly showed existence of CdWO4 nanorods and graphene sheets together. The photocatalytic activities of the as-prepared samples were investigated by degradation of methylene blue under the visible light irradiation. An enhancement in photocatalytic activity was observed with CdWO4-RGO nanocomposites in compare with the pure CdWO4. The effect of reaction temperature on the photocatalytic activity of the prepared nanocomposites was also investigated. The results showed that the CdWO4-RGO sample which prepared at 160 oC has more catalytic activity than the other samples.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"9 1","pages":"600-609"},"PeriodicalIF":1.4,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49030291","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 : 2019-10-01DOI: 10.22052/JNS.2019.04.020
Zahra Zinatloo-Ajabshir, S. Zinatloo-Ajabshir
In this investigation, curcumin niosomal nanoparticles were prepared via a simple, efficient and eco-friendly route, thin film hydration (TFH), in the presence of different mixture of the surfactants (tween 60 and span 60). Cholesterol ratio to surfactant, as effective factor, was altered to obtain the optimal nanoparticles. The size, zeta potential, size distribution, entrapment efficiency of the prepared nanoparticles were examined and compared. The optimum nanoparticles were chosen to examine the release from the dialysis membrane. Ratio of cholesterol to surfactant was found to have key and notable influence on the size, zeta potential, size distribution, entrapment efficiency of the prepared nanoparticles. The nanoparticles prepared with Formulations 3 and 5 as optimum nanoparticles were chosen to examine the release from the dialysis membrane. The results denoted that by increasing the ratio of cholesterol to surfactant, the rate of curcumin release was enhanced from the membrane. High quantities of cholesterol in the formulation 3, in addition to explosive release, can lead to slow release.
{"title":"Preparation and Characterization of Curcumin Niosomal Nanoparticles via a Simple and Eco-friendly Route","authors":"Zahra Zinatloo-Ajabshir, S. Zinatloo-Ajabshir","doi":"10.22052/JNS.2019.04.020","DOIUrl":"https://doi.org/10.22052/JNS.2019.04.020","url":null,"abstract":"In this investigation, curcumin niosomal nanoparticles were prepared via a simple, efficient and eco-friendly route, thin film hydration (TFH), in the presence of different mixture of the surfactants (tween 60 and span 60). Cholesterol ratio to surfactant, as effective factor, was altered to obtain the optimal nanoparticles. The size, zeta potential, size distribution, entrapment efficiency of the prepared nanoparticles were examined and compared. The optimum nanoparticles were chosen to examine the release from the dialysis membrane. Ratio of cholesterol to surfactant was found to have key and notable influence on the size, zeta potential, size distribution, entrapment efficiency of the prepared nanoparticles. The nanoparticles prepared with Formulations 3 and 5 as optimum nanoparticles were chosen to examine the release from the dialysis membrane. The results denoted that by increasing the ratio of cholesterol to surfactant, the rate of curcumin release was enhanced from the membrane. High quantities of cholesterol in the formulation 3, in addition to explosive release, can lead to slow release.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"9 1","pages":"784-790"},"PeriodicalIF":1.4,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45857099","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 : 2019-10-01DOI: 10.22052/JNS.2019.04.017
R. Hussain, W. Aziz, I. A. Ibrahim
In this study CuO nano sheets were prepared using the cellulose extracted from green synthesis (cotton) as a novel me project. Structural properties were examined using X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), and Ultra Violet (UV-Vis). The optimum copper oxide peak was at 2 theta 〖35.44〗^°corresponding to (1 11) while for the cellulose was 〖22.8〗^°corresponds to (002). FESEM images of CuO nano sheets were relatively homogenous with diameters less than 30 nm. The UV-Vis for CuO-cellulose nano rods was observed at 350-360 nm, which is higher than of pure CuO nano sheet. The energy band gaps were 3.20 eV and 3.30 eV of CuO and CuO-CNR respectively. Finally antimicrobial activities of samples have been investigated against the Gram positive (pneumonia) and gram-negative (pseudomonas). The maximum antibacterial activities against the Gram positive (pneumonia) of CuO nano sheet and of CuO- cellulose nano rods are 16 mm and 19 mm respectively. The maximum antibacterial activities against the Gram negative (pseudomonas) of CuO nano sheet and of CuO- cellulose nano rods are 30 mm and 33 mm.
{"title":"Antibacterial activity of CuO - cellulose nano rods depends on anew green synthesis (cotton)","authors":"R. Hussain, W. Aziz, I. A. Ibrahim","doi":"10.22052/JNS.2019.04.017","DOIUrl":"https://doi.org/10.22052/JNS.2019.04.017","url":null,"abstract":"In this study CuO nano sheets were prepared using the cellulose extracted from green synthesis (cotton) as a novel me project. Structural properties were examined using X-Ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), and Ultra Violet (UV-Vis). The optimum copper oxide peak was at 2 theta 〖35.44〗^°corresponding to (1 11) while for the cellulose was 〖22.8〗^°corresponds to (002). FESEM images of CuO nano sheets were relatively homogenous with diameters less than 30 nm. The UV-Vis for CuO-cellulose nano rods was observed at 350-360 nm, which is higher than of pure CuO nano sheet. The energy band gaps were 3.20 eV and 3.30 eV of CuO and CuO-CNR respectively. Finally antimicrobial activities of samples have been investigated against the Gram positive (pneumonia) and gram-negative (pseudomonas). The maximum antibacterial activities against the Gram positive (pneumonia) of CuO nano sheet and of CuO- cellulose nano rods are 16 mm and 19 mm respectively. The maximum antibacterial activities against the Gram negative (pseudomonas) of CuO nano sheet and of CuO- cellulose nano rods are 30 mm and 33 mm.","PeriodicalId":16523,"journal":{"name":"Journal of Nanostructures","volume":"9 1","pages":"761-767"},"PeriodicalIF":1.4,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43086497","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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