Journal of Nano Research最新文献_第4页

Heat Transfer Investigation of Laminar Flow Mixed Convection of Nanofluids in a Uniformly Heated Horizontal Annulus: A Combination of Theoretical-Based and Experimental-Based Models of Thermal Conductivity and Viscosity 纳米流体在均匀加热的水平环空中层流混合对流的传热研究:基于理论和实验的导热性和粘度模型的结合

IF 1.7 4区材料科学

Journal of Nano Research Pub Date : 2023-04-17 DOI: 10.4028/p-85299u

Mohammed Benkhedda, T. Tayebi, Ali J. Chamkha

{"title":"Heat Transfer Investigation of Laminar Flow Mixed Convection of Nanofluids in a Uniformly Heated Horizontal Annulus: A Combination of Theoretical-Based and Experimental-Based Models of Thermal Conductivity and Viscosity","authors":"Mohammed Benkhedda, T. Tayebi, Ali J. Chamkha","doi":"10.4028/p-85299u","DOIUrl":"https://doi.org/10.4028/p-85299u","url":null,"abstract":"This present study is intended for a CFD analysis of hydrodynamic and thermal characteristics of water-based fluid containing TiO2 or CuO nanoparticles flowing in laminar regime in a 3D uniformly heated horizontal annulus utilizing several. Four distinct models have been developed using various combinations (A, B, C and D) of the available theorical-based and experimental-based thermal conductivity and viscosity correlations. A CFD-Fortran code based on the finite volume technique was elaborated for the numerical solution of the mathematical model of the problem. The implications of Grashof number, volume fraction, and type of nanoparticle on isovelocity, isotherms, mean and wall temperatures, Nusselt number, heat transfer coefficient, pressure drop, and thermal performance evaluation criteria are explored using these different models. The results demonstrate that the Nusselt number and heat transfer coefficient of all developed models improve with the addition of nanoparticles. For 2% of nanoparticles’ concentration, the largest enhancement was reached for model D by about 23.5% with respect to the based liquid, while the smallest enhancement was obtained for model B by about 1.16%. The highest Performance Evaluation Criteria (PEC) are attained by employing model D by about 1.263, followed by model C by about 1.074.","PeriodicalId":16525,"journal":{"name":"Journal of Nano Research","volume":"55 1","pages":"103 - 144"},"PeriodicalIF":1.7,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73777604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0

Carbon Fibers Doped by Binary Phosphides as an Electrocatalytic Layer for PEM Electrolysers 二元磷化物掺杂碳纤维作为PEM电解槽的电催化层

IF 1.7 4区材料科学

Journal of Nano Research Pub Date : 2023-04-17 DOI: 10.4028/p-o8u8bx

Cyril Bera, Magdalena Streckova

{"title":"Carbon Fibers Doped by Binary Phosphides as an Electrocatalytic Layer for PEM Electrolysers","authors":"Cyril Bera, Magdalena Streckova","doi":"10.4028/p-o8u8bx","DOIUrl":"https://doi.org/10.4028/p-o8u8bx","url":null,"abstract":"Hydrogen evolution reactions (HER) are important in a variety of electrochemical devices, such as electrolysers and fuel cells. To reduce the reaction overpotential and reduce energy consumption, efficient, low-cost, and durable electrocatalysts must be developed. Needle-less electrospinning (NLE) technique was used to prepare the fibrous electrocatalyst. NLE is a user-friendly and adaptable technique for large-scale low-cost fiber production. NLE created transition metal phosphides carbon fibers (TMP CF). The precursor foam was folded between two Al2O3 ceramic plates. The heat treatment was carried out in a tube furnace at 1200 °C in an Ar atmosphere, followed by a reduction in an H2 atmosphere at 780 °C. The electrolyser's membrane electrode assembly can be immediately submerged in the final TMP CF in the form of plates. The created NiCoP catalytic plates could be directly used in electrolyser's membrane electrode assembly of PEM electrolysers. In a three-electrode system, the electrochemical activity of the produced electrocatalysts was evaluated using linear sweep voltammetry. The electrochemical activity of the produced electrocatalysts were evaluated using linear sweep voltammetry. The catalyst's stability and endurance in acidic and alkaline environments were investigated.","PeriodicalId":16525,"journal":{"name":"Journal of Nano Research","volume":"214 1","pages":"97 - 102"},"PeriodicalIF":1.7,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78404741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0

Synthesis and Characterization of Ag/SiO2 Nanocomposite Based on Rice Husk Silica Using Sol-Gel Method 基于稻壳二氧化硅的Ag/SiO2纳米复合材料的溶胶-凝胶法制备及表征

IF 1.7 4区材料科学

Journal of Nano Research Pub Date : 2023-04-17 DOI: 10.4028/p-54swgk

J. Junaidi, Wiwin Sulistiani, Yessi Efridahniar, I. Pratiwi, I. Firdaus, P. Manurung, P. Karo Karo

{"title":"Synthesis and Characterization of Ag/SiO2 Nanocomposite Based on Rice Husk Silica Using Sol-Gel Method","authors":"J. Junaidi, Wiwin Sulistiani, Yessi Efridahniar, I. Pratiwi, I. Firdaus, P. Manurung, P. Karo Karo","doi":"10.4028/p-54swgk","DOIUrl":"https://doi.org/10.4028/p-54swgk","url":null,"abstract":"In this study, silver-silica (Ag/SiO2) was synthesized using the sol-gel method by silica from rice husks. Silica derived from rice husk waste was previously synthesized using the sol gel method. In addition, the Ag material used in this study was also performed into silver nanoparticles (AgNPs). This method was chosen to obtain an Ag/SiO2 composite with nano size and high purity. AgNPs were synthesized using silver nitrate (AgNO3) by reduction method at 90 °C. The reducing agent and stabilizer used is trisodium citrate. UV-Vis, FTIR, XRD, and SEM-EDX were used for the analysis Ag/SiO2 composites. Uv-Vis analysis results Ag/SiO2 has an absorption peak at a wavelength of 412 nm with a bandgap energy of 2.25 eV. These peaks indicate that AgNPs have formed in the SiO2 membrane. The FTIR results revealed the Si-O-Si bonds which indicated the presence of silica and the Ag-O functional group, and the presence of AgNPs. The results of XRD analysis showed that the silica structure formed was cristobalite and silver crystals in the face center cubic (fcc) shape. The results of the SEM-EDX morphological analysis showed that the Ag/SiO2 nanocomposite was shaped like sharp stone chips and the presence of small granules (granules) with different particle sizes and shapes, slightly porous and the composition of the compounds in the Ag/SiO2 nanocomposite indicated the presence of various chemical elements in the sample, including carbon, oxygen, sodium, silica, and silver.","PeriodicalId":16525,"journal":{"name":"Journal of Nano Research","volume":"87 1","pages":"31 - 42"},"PeriodicalIF":1.7,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74591046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0

Tailoring Zeolite-Composite (ZC) Impregnated Thermally Endured Nonporous Cellulose Acetate Membranes for Potential Gas Separation and Antibacterial Performances 定制沸石复合材料(ZC)浸渍耐热无孔醋酸纤维素膜的潜在气体分离和抗菌性能

IF 1.7 4区材料科学

Journal of Nano Research Pub Date : 2023-04-17 DOI: 10.4028/p-c80drd

Zainab Fatima, Amina Afzal, Sakeena Arshad

{"title":"Tailoring Zeolite-Composite (ZC) Impregnated Thermally Endured Nonporous Cellulose Acetate Membranes for Potential Gas Separation and Antibacterial Performances","authors":"Zainab Fatima, Amina Afzal, Sakeena Arshad","doi":"10.4028/p-c80drd","DOIUrl":"https://doi.org/10.4028/p-c80drd","url":null,"abstract":"Cellulose acetate (CA) composite membranes are tailored for potential gas-transportation and antibacterial activity by incorporating various ratios (0-8wt. %) of zeolite-CuO (10:1, ZC) composite. The aim behind this is to develop an anti-biofouling membrane with enhanced CO2 permeation and selection properties. In situ coprecipitation route is adopted to synthesize ZC that imparted morphological, structural, thermal, and performance characteristics of membranes synthesized by solution casting mechanism. FESEM analysis revealed, pores size transformed from 1µm to 1.4 nm as observed in M0 (virgin) and M4 (8wt. % ZC) membranes, respectively. The existence and linkages of impregnated ZC in the developed membranes are verified by FTIR investigations. TGA-tested thermally endured membranes are tested for gas permeation/selectivity. In comparison to virgin CA membrane, three folds enhancements in CO2 permeation and two folds in CO2/N2 selectivity are observed. Membranes are also evaluated for antibacterial test against ‘gram-negative bacteria’ elucidates that increasing ZC content in composite membranes exhibit remarkable results.","PeriodicalId":16525,"journal":{"name":"Journal of Nano Research","volume":"17 1","pages":"43 - 58"},"PeriodicalIF":1.7,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75276130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Magnetic and Structural Properties of Fe-Ni and Fe-Ni-Gr Based Nanostructured Alloys Synthesized by Mechanical Alloying 机械合金化制备Fe-Ni和Fe-Ni- gr基纳米合金的磁性和结构性能

IF 1.7 4区材料科学

Journal of Nano Research Pub Date : 2023-04-17 DOI: 10.4028/p-5h903c

A. Younes, A. Bouamer, Rachid Amraoui, N. Metidji, Mounia Guessoum, A. Abada

{"title":"Magnetic and Structural Properties of Fe-Ni and Fe-Ni-Gr Based Nanostructured Alloys Synthesized by Mechanical Alloying","authors":"A. Younes, A. Bouamer, Rachid Amraoui, N. Metidji, Mounia Guessoum, A. Abada","doi":"10.4028/p-5h903c","DOIUrl":"https://doi.org/10.4028/p-5h903c","url":null,"abstract":"Nanostructured FeNi and FeNiGr alloys were successfully synthesized by the mechanical alloying technique. The alloys formation and different magnetic properties were studied as a function of milling time in the range of 0 to 30h by X-ray diffraction (XRD) technique, Scanning Electron Microscope (SEM) analysis and a Vibrating Sample Magnetometer (VSM) process. The X-ray diffraction study confirmed the apparition of the α-FeNi alloy after 5h of milling with an average crystallite size of 26.80nm. The crystallite size obtained after 30h of milling is 10.13nm, While, the lattice deformation increases from 0.431 to 0.935%. in addition, the analysis of the magnetization curves of the Fe-Ni alloys revealed original magnetic properties: super paramagnetic behavior, and especially saturation magnetization and significant coercivity. Furthermore, the addition of graphene into FeNi alloy, reduced its crystallite size from 11.56 to 6.65 nm, and increases the lattice strain and lattice parameter from 0.631 to 0.748% and from 0.28686 to 0.28704nm, respectively. Which, enhanced these magnetic properties, by increasing its coercivity (Hc) from 16. 07 to 135.42 Oe and Mr from 1.73 to 5.87 emu/g, while the magnetization saturation is decreased from 153.25 to 123.06 emu/g.","PeriodicalId":16525,"journal":{"name":"Journal of Nano Research","volume":"81 1","pages":"1 - 16"},"PeriodicalIF":1.7,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90774879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0

Synthesis of Graphene Oxide/ Poly(Vinyl Alcohol) Composite and Investigation of Graphene Oxide Effect on Diameter and Pore Size of Poly(Vinyl Alcohol) Nanofibers 氧化石墨烯/聚乙烯醇复合材料的合成及氧化石墨烯对聚乙烯醇纳米纤维直径和孔径影响的研究

IF 1.7 4区材料科学

Journal of Nano Research Pub Date : 2023-04-17 DOI: 10.4028/p-y1y1ln

Zeeshan Abdullah, A. W. Anwar, I. Haq, Zunair Arslan, Asifa Mubashar, S. Ahmad, Abdul Waheed, M. Ajmal, Imrza Imran Aziz Baig

引用次数: 0

Enhanced Thermal Diffusivity and Photocatalytic Dye Degradation Capability of Zinc Ferrite/Silver/Silver Chloride Nanocomposites 铁酸锌/银/氯化银纳米复合材料的热扩散性能和光催化降解染料性能

IF 1.7 4区材料科学

Journal of Nano Research Pub Date : 2023-04-17 DOI: 10.4028/p-383q35

Minu Pius, Frincy Francis, S. Joseph

{"title":"Enhanced Thermal Diffusivity and Photocatalytic Dye Degradation Capability of Zinc Ferrite/Silver/Silver Chloride Nanocomposites","authors":"Minu Pius, Frincy Francis, S. Joseph","doi":"10.4028/p-383q35","DOIUrl":"https://doi.org/10.4028/p-383q35","url":null,"abstract":"Herein, we report for the first time the thermal diffusivity of zinc ferrite/ silver/ silver chloride nanocomposite with a four-fold enhancement in comparison with the base fluid. A systematic analysis of the dependence of calcination temperature and synthesis routes on the crystallinity of nanocomposites of zinc ferrite with silver and silver chloride suiting it for diverse applications was done. Synthesized via the co-precipitation method, the samples were characterized using X-ray diffraction, Field emission scanning electron microscopy, Energy dispersive X-ray, Vibration sample magnetometer, ultraviolet-visible Diffusive Reflective spectroscopy and Photoluminescence studies. A zeta potential of -31.1mV was obtained for the sample showing good colloidal stability. The thermal diffusivity of the samples as nanofluids was analyzed using the dual beam thermal lens method. The study also envisages the magnetically retrievable and visible light-active nature of the synthesized samples indicating their suitability for photocatalytic degradation of toxic dyes. The work on photocatalytic degradation of methylene blue stands out in attaining rapid, efficient dye degradation of 98% within 90 minutes of sunlight exposure in comparison with unblended zinc ferrite nanoparticles even without any oxidizing agent.","PeriodicalId":16525,"journal":{"name":"Journal of Nano Research","volume":"32 1","pages":"59 - 72"},"PeriodicalIF":1.7,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85385655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Effect of Nickel Ions Substitution on the Magnetic and Optical Properties of a Nanosized Lithium-Iron Ferrite 镍离子取代对纳米锂铁铁氧体磁性和光学性能的影响

IF 1.7 4区材料科学

Journal of Nano Research Pub Date : 2023-04-17 DOI: 10.4028/p-l3c1ie

J. Mazurenko, L. Kaykan, Antony Żywczak, V. Kotsyubynsky, V. Boychuk, Lilia Turovska, I. Vakaliuk

{"title":"Effect of Nickel Ions Substitution on the Magnetic and Optical Properties of a Nanosized Lithium-Iron Ferrite","authors":"J. Mazurenko, L. Kaykan, Antony Żywczak, V. Kotsyubynsky, V. Boychuk, Lilia Turovska, I. Vakaliuk","doi":"10.4028/p-l3c1ie","DOIUrl":"https://doi.org/10.4028/p-l3c1ie","url":null,"abstract":"This paper reports on the successful synthesis of fine nanoparticles of nickel-substituted lithium-iron ferrites of composition Li0.5-x/2NixFe2.5-x/2O4 (0.2≤ x ≤1.0) by the sol-gel autocombustion method. It has been found that the alternating current (AC) and direct current (DC) conductivity is preferably tuned due to its dependence on temperature and nickel doping. Analysis of the Arrhenius dependences also confirms the appearance of more than one conduction mechanism upon substitution. The predominance of one type of conductivity over another depends on the concentration of the substituting element. Measurement of the magnetic properties has shown that the substitution of Ni2+ can significantly change the saturation and residual magnetization. Samples of composition Li0.4Ni0.2Fe2.4O4 have the highest saturation magnetization (84.08 emu/g), residual magnetization (15.85 emu/g), and the lowest coercive force (0.18 kOe). All the obtained results indicate a significant effect of the substitution of Ni2+ ions on the structure and properties of Li0.5-x/2NixFe2.5-x/2O4 ferrite nanoparticles.Photocatalytic properties have been obtained by the degradation of Methylene Blue dye under illumination with a halogen lamp. It is shown that an increase in the content of nickel ions leads to a change in the type of conductivity: from n-type (unsubstituted lithium pentaferrite) to p-type (with substitution x = 0.8 and higher). These systems are characterized by hopping conduction realized by octa-positions according to the mechanisms Fe3++e-↔Fe2+, and Ni3+↔Ni2++h+. The predominance of one or another mechanism depends on the content of nickel ions. The optical band gap ranges from 1.4 to 2.25 eV. Samples with nickel content x = 0.4 and x = 0.8 have shown the best degradation ability, which is 97% within 160 min for Methylene Blue.","PeriodicalId":16525,"journal":{"name":"Journal of Nano Research","volume":"26 1","pages":"73 - 90"},"PeriodicalIF":1.7,"publicationDate":"2023-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80049561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 0

Influence of Ligands on Physicochemical Characteristics of Magnetic Nanoparticles 配体对磁性纳米颗粒物理化学特性的影响

IF 1.7 4区材料科学

Journal of Nano Research Pub Date : 2023-04-17 DOI: 10.4028/p-2x4090

J. Szűcsová, A. Zeleňáková, Ľuboš Nagy, Michael Barutiak, Eva Beňová, V. Zeleňák, V. Závisová

引用次数: 0

Optimal Enhancement of Power Conversion Efficiency of Monolithic Perovskite Solar Cells by Effect of Methylammonium (MAI) 甲基铵(MAI)对单片钙钛矿太阳能电池功率转换效率的优化

IF 1.7 4区材料科学

Journal of Nano Research Pub Date : 2023-03-30 DOI: 10.4028/p-9ci284

Bhagavanreddy Thokala, Devarapalli Nagendra Prasad, Kumar Manoj

引用次数: 0