Nanomaterials and Nanotechnology最新文献_第9页

One-step nitrogen plasma process for bimetallic impregnation to obtain N-TiO2−X /Au/Ag composite 一步氮等离子体双金属浸渍工艺制备N-TiO2−X/Au/Ag复合材料

IF 3.7 3区材料科学

Nanomaterials and Nanotechnology Pub Date : 2020-03-12 DOI: 10.1177/1847980420905426

R. Trejo-Tzab, JA Aguilar-Jiménez, P. Quintana-Owen, A. Ávila-Ortega, M. Álvarez-Lemus, RA Medina-Esquivel

{"title":"One-step nitrogen plasma process for bimetallic impregnation to obtain N-TiO2−X /Au/Ag composite","authors":"R. Trejo-Tzab, JA Aguilar-Jiménez, P. Quintana-Owen, A. Ávila-Ortega, M. Álvarez-Lemus, RA Medina-Esquivel","doi":"10.1177/1847980420905426","DOIUrl":"https://doi.org/10.1177/1847980420905426","url":null,"abstract":"The main motivation of this work is to deposit two different metals (gold and silver) on titanium oxide nanoparticles surface in a one-step simple and fast physical process by applying a nitrogen plasma as the main source of nitrogen atoms to obtain nanostructured N-TiO2 − X /Au/Ag materials. The obtained nanomaterials were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, diffuse reflectance spectroscopy, scanning electron microscopy–energy dispersive X-ray spectroscopy, and high-resolution transmission electron microscopy. Based on the characterization results, we found that gold and silver nanoparticles were uniformly loaded on the titanium oxide nanocomposite surface, showing a surface plasmon absorption band due to the loading of the metal nanoparticles over titania samples. The results of this work have shown that nitrogen plasma technique is a more feasible and simple alternative to obtain the N-TiO2 − X /Au/Ag nanocomposite. Moreover, this plasma technique could be used to impregnate with other kind of metals over the surface of diverse nanomaterials.","PeriodicalId":19018,"journal":{"name":"Nanomaterials and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2020-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1847980420905426","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44162375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Gas-phase elemental mercury removal by nano-ceramic material 纳米陶瓷材料气相单质汞的去除

IF 3.7 3区材料科学

Nanomaterials and Nanotechnology Pub Date : 2020-02-18 DOI: 10.1177/1847980419899759

T. Zhu, Weidong Jing, Xing Zhang, Wenjing Bian, Yiwei Han, Tongshen Liu, Yiming Hou, Zefu Ye

{"title":"Gas-phase elemental mercury removal by nano-ceramic material","authors":"T. Zhu, Weidong Jing, Xing Zhang, Wenjing Bian, Yiwei Han, Tongshen Liu, Yiming Hou, Zefu Ye","doi":"10.1177/1847980419899759","DOIUrl":"https://doi.org/10.1177/1847980419899759","url":null,"abstract":"The nano-ceramic which is mesoporous silica material was applied to test the removal efficiency of gas-phase Hg0 using a fixed-bed reactor. The physical and chemical properties of nano-ceramic were investigated by various techniques such as BET surface area (BET), X-ray diffraction, fourier transform infrared spectrometer (FTIR), and scanning electron microscope (SEM); then, the sample was tested for mercury adsorption under different conditions. The mercury adsorption tests shown that different Hg0 concentration, adsorption temperature, gas flow rate, and different gas components have significant effects on the mercury removal performance of nano-ceramic, and the adsorption removal rate of nano-ceramic can be 75.58% under the optimal experimental conditions. After fitting the experimental data to the adsorption model, it was found that the theoretical maximum mercury adsorption amount q max of nano-ceramic is 1.61 mg g−1 and there were physical and chemical adsorption at the same time. The adsorption kinetics fitting results shown that the adsorption process of nano-ceramic exhibits multi-segment characteristics of “transmembrane–diffusion–adsorption.”","PeriodicalId":19018,"journal":{"name":"Nanomaterials and Nanotechnology","volume":"10 1","pages":""},"PeriodicalIF":3.7,"publicationDate":"2020-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1847980419899759","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"65714662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Strain-induced effects on the electronic properties of 2D materials 应变对二维材料电子性能的影响

IF 3.7 3区材料科学

Nanomaterials and Nanotechnology Pub Date : 2020-01-31 DOI: 10.1177/1847980420902569

S. Postorino, D. Grassano, M. D’Alessandro, Andrea Pianetti, O. Pulci, M. Palummo

{"title":"Strain-induced effects on the electronic properties of 2D materials","authors":"S. Postorino, D. Grassano, M. D’Alessandro, Andrea Pianetti, O. Pulci, M. Palummo","doi":"10.1177/1847980420902569","DOIUrl":"https://doi.org/10.1177/1847980420902569","url":null,"abstract":"Thanks to the ultrahigh flexibility of 2D materials and to their extreme sensitivity to applied strain, there is currently a strong interest in studying and understanding how their electronic properties can be modulated by applying a uniform or nonuniform strain. In this work, using density functional theory (DFT) calculations, we discuss how uniform biaxial strain affects the electronic properties, such as ionization potential, electron affinity, electronic gap, and work function, of different classes of 2D materials from X-enes to nitrides and transition metal dichalcogenides. The analysis of the states in terms of atomic orbitals allows to explain the observed trends and to highlight similarities and differences among the various materials. Moreover, the role of many-body effects on the predicted electronic properties is discussed in one of the studied systems. We show that the trends with strain, calculated at the GW level of approximation, are qualitatively similar to the DFT ones solely when there is no change in the character of the valence and conduction states near the gap.","PeriodicalId":19018,"journal":{"name":"Nanomaterials and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1847980420902569","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43885534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 24

Fabrication of silver-doped zinc oxide nanorods piezoelectric nanogenerator on cotton fabric to utilize and optimize the charging system 在棉织物上制备掺杂银氧化锌纳米棒压电纳米发电机，利用并优化充电系统

IF 3.7 3区材料科学

Nanomaterials and Nanotechnology Pub Date : 2020-01-23 DOI: 10.1177/1847980419895741

S. Rafique, A. K. Kasi, J. Kasi, M. Bokhari, Zafar Shakoor, Leander Tapfer

{"title":"Fabrication of silver-doped zinc oxide nanorods piezoelectric nanogenerator on cotton fabric to utilize and optimize the charging system","authors":"S. Rafique, A. K. Kasi, J. Kasi, M. Bokhari, Zafar Shakoor, Leander Tapfer","doi":"10.1177/1847980419895741","DOIUrl":"https://doi.org/10.1177/1847980419895741","url":null,"abstract":"Textile-based piezoelectric nanogenerator generates electrical energy from human motion. Here a novel type of textile-based piezoelectric nanogenerator is reported which is fabricated using the growth of silver-doped zinc oxide on carton fabric. Along with the optical and structural characterization of silver-doped zinc oxide nanorods, the electrical characterization was also performed for silver-doped zinc oxide piezoelectric nanogenerator. The silver-doped zinc oxide piezoelectric nanogenerator was found to generate three times greater power compared to undoped zinc oxide piezoelectric nanogenerator. By applying external mechanical force of 3 kgf and 31 MΩ of load resistance, the silver-doped zinc oxide piezoelectric nanogenerator generated an output power density of 1.45 mW cm−2. The effect of load resistance and load capacitor was determined and optimum values were calculated. The maximum output power was observed at a load resistance of 31 MΩ. The silver-doped zinc oxide piezoelectric nanogenerator was utilized to charge load capacitors and found that maximum energy could be stored at optimum load capacitance of 22 nF in 600 s (1800 cycles). This research may provide the opportunity to design high-output textile-based nanogenerators for practical applications like powering portable devices and sensors.","PeriodicalId":19018,"journal":{"name":"Nanomaterials and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2020-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1847980419895741","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45630735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 27

Energy efficiency of a flat-plate solar collector using thermally treated graphene-based nanofluids: Experimental study 使用热处理石墨烯基纳米流体的平板太阳能集热器的能效：实验研究

IF 3.7 3区材料科学

Nanomaterials and Nanotechnology Pub Date : 2020-01-01 DOI: 10.1177/1847980420964618

O. A. Alawi, H. Kamar, H. Mohammed, A. Mallah, O. A. Hussein

{"title":"Energy efficiency of a flat-plate solar collector using thermally treated graphene-based nanofluids: Experimental study","authors":"O. A. Alawi, H. Kamar, H. Mohammed, A. Mallah, O. A. Hussein","doi":"10.1177/1847980420964618","DOIUrl":"https://doi.org/10.1177/1847980420964618","url":null,"abstract":"A covalent functionalization approach was utilized for the preparation of highly dispersed pentaethylene glycol-thermally treated graphene-water as the absorbing material inside a flat-plate solar collector. Four mass fractions of nanofluids were prepared (0.025, 0.05, 0.075, and 0.1 wt% pentaethylene glycol-thermally treated graphene-water). Graphene nanoparticles were characterized by energy dispersive X-ray analysis with a scanning electron microscope. Measurements of the thermophysical properties were subsequently carried out for the nanosuspensions. The raw investigation data were collected from an indoor flat-plate solar collector test setup. The experimental procedure included different sets of variables such as input temperatures of 303, 313, and 323 K; fluid mass flow rate of 0.00833, 0.01667, and 0.025 kg s−1; and heat flow density of 500, 750, and 1000 W m−2. The thermophysical tests of pentaethylene glycol-thermally treated graphene-water nanofluids showed a proportional increase against weight concentrations, while the specific heat power was reduced. The tests showed an increment in energy efficiency by increasing the fluid mass flow rate and heat input. By comparison, the thermal efficiency decreased with the increasing temperature of the fluid supply. Relative to the base fluid, the energy efficiency of pentaethylene glycol-thermally treated graphene/water-based flat-plate solar collector increased to 10.6%, 11%, and 13.1% at the three fluid mass flow rates. In conclusion, an exponential form was used to derive the thermal effectiveness of flat-plate solar collector based on the experimental data.","PeriodicalId":19018,"journal":{"name":"Nanomaterials and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1847980420964618","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46267062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Purification of fuel ethanol engine exhaust with platinum-loaded Ce0.5Zr0.5O2 catalyst 载铂Ce0.5Zr0.5O2催化剂净化燃料乙醇发动机尾气

IF 3.7 3区材料科学

Nanomaterials and Nanotechnology Pub Date : 2019-12-06 DOI: 10.1177/1847980419886673

Fei Zhao, Chunyu Wang, Xianjing Liu, Qingyue Luo, Ling Zhu

引用次数: 0

Tunable formation of copper metal, oxide, chloride and hydroxyl chloride nanoparticles from aqueous copper solutions using nanoscale zerovalent iron particles 利用纳米级零价铁颗粒从铜水溶液中可调地形成金属铜、氧化物、氯化物和羟基氯化物纳米颗粒

IF 3.7 3区材料科学

Nanomaterials and Nanotechnology Pub Date : 2019-11-11 DOI: 10.1177/1847980419886173

R. Crane, D. Sapsford

{"title":"Tunable formation of copper metal, oxide, chloride and hydroxyl chloride nanoparticles from aqueous copper solutions using nanoscale zerovalent iron particles","authors":"R. Crane, D. Sapsford","doi":"10.1177/1847980419886173","DOIUrl":"https://doi.org/10.1177/1847980419886173","url":null,"abstract":"The influence of different parameters (solid–liquid ratio, initial pH, initial Cu concentration and anion type) on the cementation of aqueous copper (Cu) with nanoscale zerovalent iron (nZVI) has been studied. The work has been established to study both the influence such parameters have on the kinetics and efficacy of the cementation process but also the physicochemical composition of resultant Cu-bearing products. The nZVI exhibited high Cu removal capacity (maximum removal 905.2 mg/g) due to its high surface area. X-ray diffraction determined the most common Cu-bearing precipitates were Cu2O, CuCl2 and Cu2(OH)3Cl for solutions containing Cl− counterions (CuCl2 salt precursor), while Cu0 and Cu2O were the most common phases for those containing SO 4 2 − counterions (CuSO4 salt precursor). Transmission electron microscopy determined such precipitates were discrete nanoparticles of relatively high purity Cu (e.g. >80 wt% Cu or ≥99.9 wt% Cu and O). Overall the results demonstrate nZVI as effective for the one-pot transformation of aqueous Cu into a range of different high purity Cu-bearing nanoparticles. The methodology developed herein is therefore likely to have important application in the recovery of Cu from wastewater and process solutions where the direct upcycling to high-value Cu-bearing nanoparticles is an advantageous form in which to recover Cu.","PeriodicalId":19018,"journal":{"name":"Nanomaterials and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1847980419886173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48560152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

3-D magnetic graphene balls as sorbents for cleaning oil spills 三维磁性石墨烯球作为清洁漏油的吸附剂

IF 3.7 3区材料科学

Nanomaterials and Nanotechnology Pub Date : 2019-10-11 DOI: 10.1177/1847980419857373

T. Tao, Guangyao Li, Yanli He, Xiufang Yang

引用次数: 7

Synthesis of cadmium hydroxide nanostructure via composite-hydroxide-mediated approach 复合氢氧化物介导合成氢氧化镉纳米结构

IF 3.7 3区材料科学

Nanomaterials and Nanotechnology Pub Date : 2019-05-30 DOI: 10.1177/1847980419852551

J. Adnan, M. Arfan, T. Shahid, Mz Khan, R. Masab, Ah Ramish, S. Ahtasham, AG Wattoo, M. Hashim, A. Zahoor, MF Nasir

{"title":"Synthesis of cadmium hydroxide nanostructure via composite-hydroxide-mediated approach","authors":"J. Adnan, M. Arfan, T. Shahid, Mz Khan, R. Masab, Ah Ramish, S. Ahtasham, AG Wattoo, M. Hashim, A. Zahoor, MF Nasir","doi":"10.1177/1847980419852551","DOIUrl":"https://doi.org/10.1177/1847980419852551","url":null,"abstract":"Polycrystalline cadmium hydroxide nanomaterials have successfully been synthesized by composite-hydroxide-mediated approach with growth time variation. The influence of growth time on structural, morphological, elemental, and optical properties was explored using X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, energy dispersive X-ray spectroscopy, and ultraviolet–visible spectroscopy. X-ray diffraction results revealed the hexagonal and monoclinic phases of cadmium hydroxide along with rhombohedral impurity phase of cadmium carbonate. Fourier transform infrared spectroscopy further endorsed the X-ray diffraction results and confirmed the Cd–O bonding vibrations. Time-dependent uniform distribution of spherical morphology was observed in the scanning electron micrographs of the product. The presence of cadmium and oxygen in the energy dispersive X-ray spectroscopy results fingerprinted the purity and formation of the desired nanomaterials. Crystallite size was decreased with the increase of growth time as estimated by the Debye–Scherrer method. Furthermore, the optical bandgap was measured by Tauc’s relation using ultraviolet–visible absorption spectra and found to be in the range of 3.2–3.5 eV.","PeriodicalId":19018,"journal":{"name":"Nanomaterials and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2019-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1847980419852551","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44839347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Lifetime assessment of high-density polyethylene–silica nanocomposites 高密度聚乙烯-二氧化硅纳米复合材料的寿命评估

IF 3.7 3区材料科学

Nanomaterials and Nanotechnology Pub Date : 2019-05-22 DOI: 10.1177/1847980419849984

A. Dorigato, L. Govaert, A. Pegoretti

{"title":"Lifetime assessment of high-density polyethylene–silica nanocomposites","authors":"A. Dorigato, L. Govaert, A. Pegoretti","doi":"10.1177/1847980419849984","DOIUrl":"https://doi.org/10.1177/1847980419849984","url":null,"abstract":"In this work, the effect of fumed silica on the long-term resistance of high-density polyethylene was investigated. Different amounts of functionalized fumed silica nanoparticles were dispersed in a high-density polyethylene matrix by melt compounding, and compression molded specimens were tested under tensile mode in the quasi-static ramp and creep conditions. In particular, tensile tests at different speeds and temperatures and the subsequent application of the modified Ree–Eyring model allowed the determination of an analytical expression correlating the strain rate with the yield stress and the testing temperature. It was demonstrated that the introduction of fumed silica led to a significant drop in the deformation rate, especially at elevated filler amounts. Creep tests showed that the nanofiller addition led to a progressive reduction of the critical deformation values. The application of this engineering approach evidenced how nanosilica introduction led to a systematic increase of the time-to-failure values, and good accordance between theoretical prediction and experimental measurements was found.","PeriodicalId":19018,"journal":{"name":"Nanomaterials and Nanotechnology","volume":" ","pages":""},"PeriodicalIF":3.7,"publicationDate":"2019-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1847980419849984","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43762019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 32