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Characterization and Application of Nanomaterials最新文献

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Synthesis of ZnO nanometer powders doped with Ce4+ ions and the photocatalytic degradation of dying wastewater Ce4+掺杂氧化锌纳米粉体的合成及光催化降解印染废水
Characterization and Application of Nanomaterials Pub Date : 2021-11-01 DOI: 10.24294/can.v4i1.1326
Yuanyuan Zhang, Chi Huang, Li Sun, Xueying Wang
{"title":"Synthesis of ZnO nanometer powders doped with Ce4+ ions and the photocatalytic degradation of dying wastewater","authors":"Yuanyuan Zhang, Chi Huang, Li Sun, Xueying Wang","doi":"10.24294/can.v4i1.1326","DOIUrl":"https://doi.org/10.24294/can.v4i1.1326","url":null,"abstract":"Ce4+-doped nanometer ZnO powder was synthesized by so-l gel method. The microstructures and properties of the samples were characterized through XRD, UV-Vis and FTIR. The results indicated that the Ce4+ was successfully incorporated into ZnO, and the diameter of the nanometer was about 10.7nm. It induced the redshifting in the UV-Vis spectra. The photocatalytic activity of the samples was investigated using methylene blue (MB) as the model reaction under irradiation with ultraviolet light. The results showed that the doping of Ce4+ could increase the photocatalytic activities of ZnO nanopowders and that the best molar ratio of Ce4+ was n(Ce)/n(Zn) = 0.05, that the surfactant was sodium dodecyl sulfate, and that the nanometer ZnO was calcinated at 550 ℃ for 3 hours. Meanwhile, it inspected the effect of photocatalytic efficiency through the pH of MB, the amount of catalyst, and illumination time. The experimental results revealed that the initial mass concentration of MB was 10 mg/L, that the pH value was 7-8, that the dosage of Ce4+/ZnO photo-catalyst was 5 g/L, that the UV-irradiation time was 2 h, and that the removal rate of MB reached above 85%. Under the optimized conditions, the degradation rate of real dye wastewater was up to 87.67% and the removal efficiency of COD was 63.5%.","PeriodicalId":331072,"journal":{"name":"Characterization and Application of Nanomaterials","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124857196","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
A study of electrocatalytic ethanol oxidation of nanoporous PtSi alloy 电催化乙醇氧化纳米多孔PtSi合金的研究
Characterization and Application of Nanomaterials Pub Date : 2021-11-01 DOI: 10.24294/can.v4i1.1325
Nali Lu, Yao Li, Lei Zhang, Yong Fang, B. Qian, Zhida Han, Xuefan Jiang
{"title":"A study of electrocatalytic ethanol oxidation of nanoporous PtSi alloy","authors":"Nali Lu, Yao Li, Lei Zhang, Yong Fang, B. Qian, Zhida Han, Xuefan Jiang","doi":"10.24294/can.v4i1.1325","DOIUrl":"https://doi.org/10.24294/can.v4i1.1325","url":null,"abstract":"In recent years, nanoporous alloys have presented the advantages of a large specific surface area, low density, and simple operation, and they have been widely used in the fields of catalysis, magnetism, and medicine. Nanoporous Pt-Si alloy was prepared by melt-spun and chemical dealloying, and was characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscope, and transmission electron microscopy. Pt-Si alloys possess a three-dimensional bicontinuous structure and an average size of 5 nanometers. Compared with commercial Pt/C catalysts, nanoporous Pt-Si alloys exhibit excellent electrocatalytic activity and stability in ethanol-catalyzed oxidation reactions. It is taken into consideration to be a promising catalyst in direct ethanol fuel cells.","PeriodicalId":331072,"journal":{"name":"Characterization and Application of Nanomaterials","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122805521","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
Synthesis and application of nano-MH/MPB as intumescent flame retardant (IFR) 纳米mh /MPB膨胀阻燃剂的合成及应用
Characterization and Application of Nanomaterials Pub Date : 2021-11-01 DOI: 10.24294/can.v4i2.1332
Aiming Zhao, Yanmao Dong, Q. Ni, Zhiyu Bao
{"title":"Synthesis and application of nano-MH/MPB as intumescent flame retardant (IFR)","authors":"Aiming Zhao, Yanmao Dong, Q. Ni, Zhiyu Bao","doi":"10.24294/can.v4i2.1332","DOIUrl":"https://doi.org/10.24294/can.v4i2.1332","url":null,"abstract":"Magnesium hydroxide/melamine phosphate borate (nano MH/MPB), a novel nano-composition intumescent flame retardant, was synthesized with the in-situ reaction method from MgCl2·6H2O sodium hydroxide (NaOH) and melamine phosphate borate (MPB) in the absence of H2O. The structure of the product was confirmed by EDAX IR and XRD. The effects of reaction temperature and time on the dimension of magnesium hydroxide were observed. The effects of mass ratio of magnesium hydroxide to MPB on the flame retardancy of nano-MH/MPB/EP were examined with the limiting oxygen test. The results show that the optimal condition of synthesis of MH/MPB is mMH/mMPB = 0.25, reacting under 75 ℃ for 30 minutes. Finally, the mechanism for flame retardancy of nano-MH/MPB/EP was pilot studied by means of IR of char layer and TG of MH/MPB.","PeriodicalId":331072,"journal":{"name":"Characterization and Application of Nanomaterials","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114199078","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
Sedimentation of nanoparticle titanium dioxide in the presence of ammonium 纳米二氧化钛在铵存在下的沉降
Characterization and Application of Nanomaterials Pub Date : 2021-11-01 DOI: 10.24294/can.v4i2.1333
Duo Li, Nan Xu
{"title":"Sedimentation of nanoparticle titanium dioxide in the presence of ammonium","authors":"Duo Li, Nan Xu","doi":"10.24294/can.v4i2.1333","DOIUrl":"https://doi.org/10.24294/can.v4i2.1333","url":null,"abstract":"Due to its physicochemical properties, nanoparticles titanium dioxide (nTiO2) is being put into mass production and widespread applications, which inevitably results in their increasing exposure to the water body. After it entering the water body, the chemical properties of nTiO2 can be influenced by ion compositions, ion strength and pH, which affects their ecological risk. Excess of ammonium (NH4+) fertilizer has contaminated soil and water environments. In this paper, the Zeta potentials and hydrodynamic radius of nTiO2 were studied in NH4+ solution compared to those in Na+ solution. In addition, the sedimentation rate of nTiO2 was also investigated. The experiment results show that high pH inhibits the sedimentation of nTiO2. Moreover, NH4+ increases the stability of nTiO2 more than Na+ at the same IS, which was attributed the more negative Zeta potentials and the smaller hydraulic radius. Our results provide a theoretical basis for evaluating the ecological risk of nTiO2 in aqueous solution containing NH4+.","PeriodicalId":331072,"journal":{"name":"Characterization and Application of Nanomaterials","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116319213","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
Spin thermoelectric effects on aluminum or phosphorus doped zigzag silicene nanoribbons 掺杂铝或磷之字形硅纳米带的自旋热电效应
Characterization and Application of Nanomaterials Pub Date : 2021-11-01 DOI: 10.24294/can.v4i2.1336
Jiali Song, Xue Zhang, Xuefeng Wang, Jinfu Feng, Yushen Liu
{"title":"Spin thermoelectric effects on aluminum or phosphorus doped zigzag silicene nanoribbons","authors":"Jiali Song, Xue Zhang, Xuefeng Wang, Jinfu Feng, Yushen Liu","doi":"10.24294/can.v4i2.1336","DOIUrl":"https://doi.org/10.24294/can.v4i2.1336","url":null,"abstract":"Based on the density-functional theory (DFT) combined with nonequilibrium Green’s function (NGF), this paper investigates the effects of either single aluminum (Al) or single phosphorus (P) atom substitutions at different edge positions of zigzag-edged silicene nanoribbons (ZGNRs) in the ferromagnetic state on the spin-dependent transport properties and spin thermoelectric effects. It has been found that the spin polarization at the Fermi level can reach 100% or –100% in the doped ZSiNRs. Meanwhile, the spin-up Seebeck effect (for -100% case) and spin-down Seebeck effect (for 100% case) are also enhanced. Moreover, the spin Seebeck coefficient is much larger than the corresponding charge Seebeck coefficient at a special doping position and electron energy. Therefore, the study shows that the Al or P doped ZSiNRs can be used to prepare the ideal thermospin devices.","PeriodicalId":331072,"journal":{"name":"Characterization and Application of Nanomaterials","volume":"416 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115135114","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
Defocused image restoration method based on micro-nano scale 基于微纳尺度的离焦图像恢复方法
Characterization and Application of Nanomaterials Pub Date : 2021-11-01 DOI: 10.24294/can.v4i2.1335
Yongjun Liu, Qiuyu Wu, Mingxin Zhang, Yi Wang
{"title":"Defocused image restoration method based on micro-nano scale","authors":"Yongjun Liu, Qiuyu Wu, Mingxin Zhang, Yi Wang","doi":"10.24294/can.v4i2.1335","DOIUrl":"https://doi.org/10.24294/can.v4i2.1335","url":null,"abstract":"An image adaptive noise reduction enhancement algorithm based on NSCT is proposed to perform image restoration preprocessing on the defocused image obtained under the microscope. Defocused images acquired under micro-nano scale optical microscopy, usually with inconspicuous details, edges and contours, affect the accuracy of subsequent observation tasks. Due to its multi-scale and multi-directionality, the NSCT transform has superior transform functions and can obtain more textures and edges of images. Combined with the characteristics of micro-nanoscale optical defocus images, the NSCT inverse transform is performed on all sub-bands to reconstruct the image. Finally, the experimental results of the standard 500nm scale grid, conductive probe and triangular probe show that the proposed algorithm has a better image enhancement effect and significantly improves the quality of out-of-focus images.","PeriodicalId":331072,"journal":{"name":"Characterization and Application of Nanomaterials","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126530287","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
Study on synthesis and adsorption property of porous carbon/Ni nanoparticle composites 多孔碳/镍纳米颗粒复合材料的合成及吸附性能研究
Characterization and Application of Nanomaterials Pub Date : 2021-11-01 DOI: 10.24294/can.v4i1.1327
Sailu Xu, Yuxin Du, Meiqi Hui, Zichen Wang, Junfeng Zhao, Gang Yang
{"title":"Study on synthesis and adsorption property of porous carbon/Ni nanoparticle composites","authors":"Sailu Xu, Yuxin Du, Meiqi Hui, Zichen Wang, Junfeng Zhao, Gang Yang","doi":"10.24294/can.v4i1.1327","DOIUrl":"https://doi.org/10.24294/can.v4i1.1327","url":null,"abstract":"The porous carbon/Ni nanoparticle composite was prepared by a freeze-drying method using NaCl as the template. It was applied in the effect of the concentration, adsorption time, and temperature of adsorption on the adsorption behavior. The kinetic model and the adsorption isothermic fitting results show that the adsorption behavior fits with the pseudo-secondary dynamics and the Langmuir isothermal model, indicating that the adsorption process is monolayer adsorption. Thermodynamic results indicate that the adsorption process is spontaneous physicochemical adsorption. The fitting showed that the porous carbon/Ni nanoparticle composites reach 217.17 mg·g-1, at 313 K indicates good adsorption for Congo red.","PeriodicalId":331072,"journal":{"name":"Characterization and Application of Nanomaterials","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121033633","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
From atomic-scale interfaces — To new nanomaterials 从原子尺度的界面到新的纳米材料
Characterization and Application of Nanomaterials Pub Date : 2019-12-25 DOI: 10.24294/can.v2i2.835
N. Plusnin
{"title":"From atomic-scale interfaces — To new nanomaterials","authors":"N. Plusnin","doi":"10.24294/can.v2i2.835","DOIUrl":"https://doi.org/10.24294/can.v2i2.835","url":null,"abstract":"The problem of the synthesis of new type nanomaterials in the form of nano-coatings with sub-nanometric heterogeneity has been formulated. It has been presented an analysis of influences of physical vapor deposition in ultrahigh vacuum on the process of intermixing a film with a substrate, including the results, which has been obtained under the formation of transition metal – silicon interface. The generalization of the obtained experimental results develops an approach to the development of new nano-coatings with low-dimensional heterogeneity. The principles of constructing such low-dimensional nano-coatings, their properties and possible applications are considered. ","PeriodicalId":331072,"journal":{"name":"Characterization and Application of Nanomaterials","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132620805","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
Nano CoO-Cu-MgO catalyst for vapor phase simultaneous synthesis of ortho-chloroaniline and γ-butyrolactone from ortho-cholonitrobenzne and 1,4-butanediol 邻氯硝基苯和1,4-丁二醇气相同时合成邻氯苯胺和γ-丁内酯的纳米cu - cu - mgo催化剂
Characterization and Application of Nanomaterials Pub Date : 2019-07-12 DOI: 10.24294/CAN.V0I0.523
Hari Prasad Reddy Kannapu, Y. Suh, Veeralakshmi Vaddeboina, Anand Narani, David Raju Burri, S. Kamaraju
{"title":"Nano CoO-Cu-MgO catalyst for vapor phase simultaneous synthesis of ortho-chloroaniline and γ-butyrolactone from ortho-cholonitrobenzne and 1,4-butanediol","authors":"Hari Prasad Reddy Kannapu, Y. Suh, Veeralakshmi Vaddeboina, Anand Narani, David Raju Burri, S. Kamaraju","doi":"10.24294/CAN.V0I0.523","DOIUrl":"https://doi.org/10.24294/CAN.V0I0.523","url":null,"abstract":"The article aims at developing an efficient and stable catalysts for simultaneous hydrogenation of o-chloronitrobenzene to o-chloroaniline and 1,4-butanediol dehydrogenation to γ-butyrolactone. A series of CoO-Cu-MgO catalysts, composed of 10 wt% of copper, various amount of cobalt loadings (1, 5 and 10 wt%) and remaining of MgO were developed by co-precipitation followed by thermal treatment. o-Chloroaniline and γ-butyrolactone were the main products with high yield of 85% and 90%, respectively. The advantage of the coupling process is that the hydrogenation reaction was conducted without external hydrogen, demonstrating minimize the hydrogen consumption known as hydrogen economy route. From N2O characterization results, the high activity of 5CoO-10Cu-MgO was found that it has high amount of Cu species (Cu0/Cu+1) which govern the stable activity and selectivity on time on stream study in presence of cobalt in Cu-MgO.","PeriodicalId":331072,"journal":{"name":"Characterization and Application of Nanomaterials","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130074493","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: 1
Nano CoO-Cu-MgO catalyst for vapor phase simultaneous synthesis of ortho-chloroaniline and γ-butyrolactone from ortho-cholonitrobenzne and 1,4-butanediol 邻氯硝基苯和1,4-丁二醇气相同时合成邻氯苯胺和γ-丁内酯的纳米cu - cu - mgo催化剂
Characterization and Application of Nanomaterials Pub Date : 2019-07-12 DOI: 10.24294/can.v2i3.523
Hari Prasad Reddy Kannapu 1,2,3, Young-Woong Suh2,3, Veeralakshmi Vaddeboina 1, Anand Narani 1, David Raju Burri 1, Seetha Rama Rao Kamaraju 1
{"title":"Nano CoO-Cu-MgO catalyst for vapor phase simultaneous synthesis of ortho-chloroaniline and γ-butyrolactone from ortho-cholonitrobenzne and 1,4-butanediol","authors":"Hari Prasad Reddy Kannapu 1,2,3, Young-Woong Suh2,3, Veeralakshmi Vaddeboina 1, Anand Narani 1, David Raju Burri 1, Seetha Rama Rao Kamaraju 1","doi":"10.24294/can.v2i3.523","DOIUrl":"https://doi.org/10.24294/can.v2i3.523","url":null,"abstract":"Aiming at developing an efficient catalysts for simultanoius hydrogenation of o-chloronitrobenzene to o-chloroaniline and 1,4-butanediol dehydrogenation to  γ-butyrolactone. A series of CoO-Cu-MgO catalysts, composed of 10 wt% of copper, various amount of cobalt loadings (1, 5 and 10 wt%) and remaining of MgO were developed by co-precipitation followed by thermal treatment. o-Chloroaniline and γ-butyrolactone were the main products with high yield of 85% and 90%, respectively. The advantage of the coupling process is that the hydrogenation reaction was conducted without external hydrogen, indicating minimise the hydrogen consumption which is also known as hydrogen economy route. From N2O characterization results, the high activtiy of 5CoO-10Cu-MgO was found to have high amount of Cu species (Cu0/Cu+1) species and govern the stable activity and selectivity on time on stream study in presence of cobalt in Cu-MgO.","PeriodicalId":331072,"journal":{"name":"Characterization and Application of Nanomaterials","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121711464","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
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