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A New and Original Method to Produce Ca(OH)2 Nanoparticles by Using an Anion Exchange Resin 利用阴离子交换树脂制备纳米Ca(OH)2的新方法
纳米粒子(英文) Pub Date : 2015-04-02 DOI: 10.4236/ANP.2015.42003
G. Taglieri, V. Daniele, G. D. Re, R. Volpe
{"title":"A New and Original Method to Produce Ca(OH)2 Nanoparticles by Using an Anion Exchange Resin","authors":"G. Taglieri, V. Daniele, G. D. Re, R. Volpe","doi":"10.4236/ANP.2015.42003","DOIUrl":"https://doi.org/10.4236/ANP.2015.42003","url":null,"abstract":"Ca(OH)2 nanoparticles in hydro-alcoholic dispersion (nanolime) were successfully employed in Cultural Heritage conservation, thanks to the ability to overcome the limiting aspects of traditional lime treatments. Nanolime were currently produced by chemical precipitation process, at high temperature, with long times of synthesis, and after several purification steps to remove undesired secondary phases. In this paper, an innovative, simple and original method for nanolime production was described. The method was based on an ion exchange process between an anionic resin and a calcium chloride aqueous solution, operating at room temperature. A pure Ca(OH)2 nanoparticles suspension can be rapidly obtained after separating the resin from suspension, and any purification step was necessary. The exhausted resins can be regenerated and reused for a cyclic nanolime production. Structural and morphological features of the produced nanolime were preliminarily characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Moreover, XRD measurements allowed estimating nanoparticles reactivity by following their carbonatation process in air, in relation to different water/alcohol ratios and medium or high relative humidity conditions. The produced Ca(OH)2 nanoparticles appeared hexagonally plated, with dimension less than 100 nm and, compared with those obtained by typical wet precipitation method, they proved to be more reactive.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"04 1","pages":"17-24"},"PeriodicalIF":0.0,"publicationDate":"2015-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337848","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}
引用次数: 33
Microwave-Hydrothermal Synthesis of Ferric Oxide Doped with Cobalt 微波-水热法合成掺钴氧化铁
纳米粒子(英文) Pub Date : 2015-04-02 DOI: 10.4236/ANP.2015.42007
Eman Alzahrani, Abeer A. Sharfalddin, Mohamad Alamodi
{"title":"Microwave-Hydrothermal Synthesis of Ferric Oxide Doped with Cobalt","authors":"Eman Alzahrani, Abeer A. Sharfalddin, Mohamad Alamodi","doi":"10.4236/ANP.2015.42007","DOIUrl":"https://doi.org/10.4236/ANP.2015.42007","url":null,"abstract":"Ferric oxides have drawn significant interest due to their unique properties, relatively low cost, \u0000and due to their potential applications in different fields. In this work, cobalt (Co) doped iron oxide \u0000(Fe2O3) powders, with crystalline size 36.97 nm were successfully prepared using a microwave- \u0000hydrothermal process for the first time and characterised using different techniques. The \u0000morphology of the samples was characterised by scanning electron microscopy (SEM), transmission \u0000electron microscopy (TEM), energy dispersive analysis of X-ray spectroscopy (EDAX), Fourier \u0000transform infrared (FT-IR) spectroscopy and ultraviolet-visible (UV-Vis) spectroscopy. The images \u0000show monodispersed particles with a sharp-edged square morphology. It was found that the average \u0000size was about 33.3 nm for Fe2O3 and 36.97 nm for Co-Fe2O3. The Co atomic percentage dopants \u0000were approximately 5.73%. The nanosized synthesised materials in this study may find an \u0000application in the areas of removal of toxic metal and dyes research.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"32 1","pages":"53-60"},"PeriodicalIF":0.0,"publicationDate":"2015-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4236/ANP.2015.42007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337633","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}
引用次数: 22
Structural and Optical Properties of Mg 1-x Zn x Fe 2 O 4 Nano-Ferrites Synthesized Using Co-Precipitation Method 共沉淀法合成mg1 - xzn × fe2o纳米铁氧体的结构和光学性质
纳米粒子(英文) Pub Date : 2015-04-02 DOI: 10.4236/ANP.2015.42006
A. I. Ahmed, M. Siddig, A. A. Mirghni, M. Omer, A. Elbadawi
{"title":"Structural and Optical Properties of Mg 1-x Zn x Fe 2 O 4 Nano-Ferrites Synthesized Using Co-Precipitation Method","authors":"A. I. Ahmed, M. Siddig, A. A. Mirghni, M. Omer, A. Elbadawi","doi":"10.4236/ANP.2015.42006","DOIUrl":"https://doi.org/10.4236/ANP.2015.42006","url":null,"abstract":"In this work, the Mg1-x Znx Fe2 O4 Nanoferrites (where x = 0.0, 0.2, 0.4, 0.6 and 0.8) was synthesized using co-precipitation method. The investigation of structural and optical properties was carried out for the synthesized samples using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Ultraviolet visible spectrophotometer (UV-Vis). XRD revealed that the structure of these nanoparticles is spinel with space group Fd3m and crystallite size lies in the range 21.0 - 42.8 nm. Lattice parameter was found to increases with Zn concentration and this may be due to the larger ionic radius of the Zn2+ ion. FTIR spectroscopy confirmed the formation of spinel ferrite and showed the characteristics absorption bands around 612, 1146, 1404, 1649 and 3245 cm-1. The energy band gap was calculated for samples with different ratio and was found to be 4.77, 4.82, 4.86, 4.87 and 4.95 eV. The substitution was resulted in slight increased in the lattice constant and that sequentially may lead to the slightly decreased in the energy gap.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"04 1","pages":"45-52"},"PeriodicalIF":0.0,"publicationDate":"2015-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337577","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}
引用次数: 30
Effect of Sintering Temperature on Co0.5 Zn0.5 Fe2 O4 Nano-Particles Evolution and Particle Size Distribution 烧结温度对Co0.5 Zn0.5 fe2o4纳米颗粒演化及粒径分布的影响
纳米粒子(英文) Pub Date : 2015-04-02 DOI: 10.4236/ANP.2015.42005
A. Yakubu, Z. Abbas, M. Hashim, A. Fahad
{"title":"Effect of Sintering Temperature on Co0.5 Zn0.5 Fe2 O4 Nano-Particles Evolution and Particle Size Distribution","authors":"A. Yakubu, Z. Abbas, M. Hashim, A. Fahad","doi":"10.4236/ANP.2015.42005","DOIUrl":"https://doi.org/10.4236/ANP.2015.42005","url":null,"abstract":"This study involves an investigation to ascertain the effect of sintering temperature on the particle \u0000size distribution of Co0.5 Zn0.5 Fe2O4 nano-particle. The effect of the sintering temperature towards \u0000diffusion of CoO and ZnO into the tetrahedral and octahedral sites was also reported. In this study, \u0000CoO, ZnO and Fe2O3 powders were mechanically alloyed to synthesize fine powders of Co0.5 Zn0.5 Fe2O4 nano-particles. The synthesized powder was then sintered at various temperatures which \u0000were employed to study the effect of sintering temperature on the materials. Further analysis was \u0000done using XRD to investigate the phases of the powder and the crystallite size using Scherrer \u0000equation, SEM and EDX for the morphology and elemental composition of samples. The XRD spectra \u0000indicated that Both ZnO and CoO powder reacted well during sintering, however, ZnO was first \u0000to diffuse into its crystallographic sites before CoO. While the particle size distribution increases \u0000as the sintering temperature increases. Amongst other findings, it was confirmed that sintering \u0000temperature affects the particle size distribution of samples and samples begin to agglomerate at \u0000temperature above 700°C.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"147 1","pages":"37-44"},"PeriodicalIF":0.0,"publicationDate":"2015-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337524","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}
引用次数: 9
Exact Traveling Wave Solutions of Nano-Ionic Solitons and Nano-Ionic Current of MTs Using the exp(-φ (ξ ))-Expansion Method 用exp(-φ (ξ))展开法求解纳米离子孤子和纳米离子电流的精确行波
纳米粒子(英文) Pub Date : 2015-04-02 DOI: 10.4236/ANP.2015.42004
E. Zahran
{"title":"Exact Traveling Wave Solutions of Nano-Ionic Solitons and Nano-Ionic Current of MTs Using the exp(-φ (ξ ))-Expansion Method","authors":"E. Zahran","doi":"10.4236/ANP.2015.42004","DOIUrl":"https://doi.org/10.4236/ANP.2015.42004","url":null,"abstract":"In this work, the exp(-φ (ξ )) -expansion method is used for the first time to investigate the exact traveling wave solutions involving parameters of nonlinear evolution equations. When these parameters are taken to be special values, the solitary wave solutions are derived from the exact traveling wave solutions. The validity and reliability of the method are tested by its applications to Nano-ionic solitons wave’s propagation along microtubules in living cells and Nano-ionic currents of MTs which play an important role in biology.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"04 1","pages":"25-36"},"PeriodicalIF":0.0,"publicationDate":"2015-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337867","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}
引用次数: 12
Possible Magnetic Resonance Signal Due to the Movement of Counterions around a Polyelectrolyte with Rotational Symmetry 旋转对称聚电解质周围反离子运动可能产生的磁共振信号
纳米粒子(英文) Pub Date : 2015-01-27 DOI: 10.4236/ANP.2015.41002
J. Fornés
{"title":"Possible Magnetic Resonance Signal Due to the Movement of Counterions around a Polyelectrolyte with Rotational Symmetry","authors":"J. Fornés","doi":"10.4236/ANP.2015.41002","DOIUrl":"https://doi.org/10.4236/ANP.2015.41002","url":null,"abstract":"Experimental, theoretical and computational studies revealed that the characteristic time scales involved in counterion dynamics in polyelectrolytes systems might span several orders of magnitude ranging from subnanosecond times to time scales corresponding to acoustic-like phonon mode frequencies, with an structural organization of counterions in charge density waves (CDWs). These facts raise the possibility of observing Magnetic Resonance (MR) signals due to the movement of counterions in polyelectrolytes. In case that this signal is detected in macroions or other biological systems, like micelles, vesicles, organeles, etc. with rotational symmetry, this method opens a new tool to measure with precission the counterions velocity.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"04 1","pages":"11-16"},"PeriodicalIF":0.0,"publicationDate":"2015-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337727","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}
引用次数: 0
RETRACTED: Extensive Studies on X-Ray Diffraction of Green Synthesized Silver Nanoparticles 撤下:绿色合成纳米银的x射线衍射的广泛研究
纳米粒子(英文) Pub Date : 2015-01-27 DOI: 10.4236/ANP.2015.41001
Satish Bykkam, M. Ahmadipour, Sowmya Narisngam, Venkateswara Rao Kalagadda, S. Chidurala
{"title":"RETRACTED: Extensive Studies on X-Ray Diffraction of Green Synthesized Silver Nanoparticles","authors":"Satish Bykkam, M. Ahmadipour, Sowmya Narisngam, Venkateswara Rao Kalagadda, S. Chidurala","doi":"10.4236/ANP.2015.41001","DOIUrl":"https://doi.org/10.4236/ANP.2015.41001","url":null,"abstract":"Short \u0000Retraction Notice \u0000 \u0000 \u0000 The \u0000substantial portions of the text came from T.Theivanthi et.al., \u0000\"Electrolytic Synthesis and Characterization of Silver Nanopowder\". \u0000 \u0000 \u0000 This \u0000article has been retracted to straighten the academic record. In making this \u0000decision the Editorial Board follows COPE's Retraction Guidelines. Aim is to \u0000promote the circulation of scientific research by offering an ideal research \u0000publication platform with due consideration of internationally accepted \u0000standards on publication ethics. The Editorial Board would like to extend its \u0000sincere apologies for any inconvenience this retraction may have caused. \u0000 \u0000 \u0000 Guiding \u0000this retraction: ANP Editorial Office \u0000 \u0000 \u0000 The full \u0000retraction notice in PDF is preceding the original paper which is \u0000marked \"RETRACTED\".","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"04 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2015-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4236/ANP.2015.41001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337658","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}
引用次数: 83
Synthesis of Tantalum Hydride Using Mechanical Milling and Its Characterization by XRD, SEM, and TGA 机械铣削合成氢化钽及其XRD、SEM、TGA表征
纳米粒子(英文) Pub Date : 2014-11-11 DOI: 10.4236/ANP.2014.34020
J. L. Iturbe-García, B. López-Muñoz
{"title":"Synthesis of Tantalum Hydride Using Mechanical Milling and Its Characterization by XRD, SEM, and TGA","authors":"J. L. Iturbe-García, B. López-Muñoz","doi":"10.4236/ANP.2014.34020","DOIUrl":"https://doi.org/10.4236/ANP.2014.34020","url":null,"abstract":"In this paper, we report the results obtained from different phases of metal hydrides. The synthesis and characterization of tantalum hydrides were obtained “in situ” during mechanical milling. Elemental Ta with purity of 99.8% was used in this investigation to obtain the hydrides. A highenergy ball milling technique was utilized to prepare hydrogenated phases. Ta hydrides and oxides were formed as function of milling process time. Milling times of 5, 10 and 20 hours were programmed, and the ball-to-powder weight ratio was 10:1. The material was first characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Before and after hydrogenation process the material was also analyzed by TGA. X-ray diffraction analysis demonstrated that only tantalum hydrides (Ta2H and TaH0.5) were obtained after 20 h of milling. We will discuss the effect of the ball-milling process about formation “in situ” of nanometric tantalum hydrides with methanol as a hydrogen source.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"03 1","pages":"159-166"},"PeriodicalIF":0.0,"publicationDate":"2014-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337592","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}
引用次数: 4
Synthesis of Niobium Doped ZnO Nanoparticles by Electrochemical Method: Characterization, Photodegradation of Indigo Carmine Dye and Antibacterial Study 铌掺杂ZnO纳米颗粒的电化学合成:表征、靛蓝胭脂红染料的光降解及抗菌研究
纳米粒子(英文) Pub Date : 2014-11-11 DOI: 10.4236/ANP.2014.34018
Rakesh nbsp, S. Ananda, N. Gowda, K. Raksha
{"title":"Synthesis of Niobium Doped ZnO Nanoparticles by Electrochemical Method: Characterization, Photodegradation of Indigo Carmine Dye and Antibacterial Study","authors":"Rakesh nbsp, S. Ananda, N. Gowda, K. Raksha","doi":"10.4236/ANP.2014.34018","DOIUrl":"https://doi.org/10.4236/ANP.2014.34018","url":null,"abstract":"Niobium doped Zincoxide nanoparticles has been synthesized through electrochemical method and characterized by UV-Visible spectroscopy, IR Spectroscopy, SEM, XRD, ICPMS and EDAX data. The UV-Visible spectroscopy result reveals that the band gap energy of ZnO/Nb2O5 nanoparticles to be 3.8 eV. The XRD results show that the crystallite size is to be 31.9 nm. The ICPMS data indicate the presence of 3,3461,328 counts of 93 Nb and 577,906,390 counts of 66 Zn. An improvement in the photocatalytic degradation of Indigocarmine dye (IC) in comparison to commercially available pure ZnO was observed. The photodegradation efficiency for ZnO/Nb2O5 and ZnO were found to be 97.4% and 52.1% respectively. The enhancement in photocatalytic activity of ZnO/ Nb2O5 was ascribed to the extended light absorption range and suppression of electron hole pair recombination upon Nb loading. The antibacterial activity of ZnO/Nb2O5 nanoparticles was investigated. These particles were shown to have an effective bactericide.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"03 1","pages":"133-147"},"PeriodicalIF":0.0,"publicationDate":"2014-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4236/ANP.2014.34018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337830","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}
引用次数: 23
Synthesis and Biological Activity of Drug Delivery System Based on Chitosan Nanocapsules 壳聚糖纳米胶囊给药系统的合成及其生物活性研究
纳米粒子(英文) Pub Date : 2014-11-11 DOI: 10.4236/ANP.2014.34019
M. Gouda, U. el-Ayaan, M. Youssef
{"title":"Synthesis and Biological Activity of Drug Delivery System Based on Chitosan Nanocapsules","authors":"M. Gouda, U. el-Ayaan, M. Youssef","doi":"10.4236/ANP.2014.34019","DOIUrl":"https://doi.org/10.4236/ANP.2014.34019","url":null,"abstract":"Chitosan nanocapsules containing naproxen as an active ingredient were synthesized by ionic ge- lation method in presence of polyanion tripolyphosphate as a crosslinker. The morphology and diameter of the prepared chitosan nanoparticles was characterized using scanning electron mi- croscopy and transition electron microscopy. Different factors affecting on the size diameter of chitosan nanoparticles such as stirring time and temperature, pH values as well as chitosan con- centration were studied. Different factors affecting on the immobilization of naproxen into chito- san nanoparticles such as time, temperature and pH values were optimized. Synthesized naprox- en/chitosan nanocapsules were assessed against both Gram positive bacterial strain such as Ba- cillus subtilis and Staphylococcus aureus and Gram negative bacterial strain such as Pseudomonas aeruginosa and Escherichia coli. Also, the antifungal activity of the naproxen/chitosan nanocap- sules against Saccharomyces cerevisiae was demonstrated. Super oxide dismutase like activity of naproxen/chitosan nanocapsules will be determined.","PeriodicalId":71264,"journal":{"name":"纳米粒子(英文)","volume":"03 1","pages":"148-158"},"PeriodicalIF":0.0,"publicationDate":"2014-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70337875","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}
引用次数: 16
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