Wollastonite is a neutral mineral with a high modulus of elasticity that is composed of two parts of lime and silica in almost equal proportions and the structure of this mineral is fibrous and needle-shaped, which distinguishes it from other minerals. In recent years, extensive research has been conducted on nanomaterials as bitumen modifiers and asphalt mixtures. The effect of morphology and nanoscale wastes mineral wollastonite as bitumen additive on the properties of asphalt mixture was investigated. According to the test findings, the use of nanowollastonite increases the G* sinδ parameter between 2000-3700 kPa at room temperature, resulting in a 45% reduction in the fatigue failure factor. Additionally, the rutting factor, G*/sinδ, increases between 3.75-4.75 kPa, indicating that the presence of nanowollastonite extends the pavement’s rutting life by 20% at the optimal concentration of 4% nanowollastonite. Findings demonstrate that waste nanowollastonite can be introduced as a new waste material to enhance the performance of asphalt pavement, considering the shape and size of its nano-components. Furthermore, incorporating waste nanowollastonite in the present design of asphalt concrete has a significant impact on reducing energy usage. Encouraging the use of these waste nanoparticles is worthwhile in order to reduce global energy consumption and pollution.
{"title":"Effect of nanowollastonite wastes on the bitumen properties and the performance of hot asphalt mixtures","authors":"Hasan Mohammadi Anaei, M. Khabiri, A. Mansourian","doi":"10.1680/jnaen.22.00017","DOIUrl":"https://doi.org/10.1680/jnaen.22.00017","url":null,"abstract":"Wollastonite is a neutral mineral with a high modulus of elasticity that is composed of two parts of lime and silica in almost equal proportions and the structure of this mineral is fibrous and needle-shaped, which distinguishes it from other minerals. In recent years, extensive research has been conducted on nanomaterials as bitumen modifiers and asphalt mixtures. The effect of morphology and nanoscale wastes mineral wollastonite as bitumen additive on the properties of asphalt mixture was investigated. According to the test findings, the use of nanowollastonite increases the G* sinδ parameter between 2000-3700 kPa at room temperature, resulting in a 45% reduction in the fatigue failure factor. Additionally, the rutting factor, G*/sinδ, increases between 3.75-4.75 kPa, indicating that the presence of nanowollastonite extends the pavement’s rutting life by 20% at the optimal concentration of 4% nanowollastonite. Findings demonstrate that waste nanowollastonite can be introduced as a new waste material to enhance the performance of asphalt pavement, considering the shape and size of its nano-components. Furthermore, incorporating waste nanowollastonite in the present design of asphalt concrete has a significant impact on reducing energy usage. Encouraging the use of these waste nanoparticles is worthwhile in order to reduce global energy consumption and pollution.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141229842","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}
The current research focuses on low-carbon alternatives for air conditioning systems that use sustainable and low-power drives. This detailed research takes into account a 1-ton capacity air conditioning system using several refrigerants based on vapor compression. Natural refrigerants should be used instead of all synthetic ones due to their environmentally favorable properties. Using the CoolPack software platform, the comparative analysis was conducted and it was found that the natural refrigerants R290 and R600a exhibit promising results in terms of heat removal from the evaporator (Qe [kW], heat removal from the condenser (Qc [kW], work done by the compressor (W [kW], and Co-efficient of Performance (COP) when fixed temperatures of 10 °C for the evaporator and 50 °C for the condenser are preserved. For refrigerant R600a, superheating at the compressor (inlet) suction by 5°C is necessary to maintain the running cycle within a practical working zone. Given that a 1-ton vapor compression cycle air conditioning system based on R290 has a compressor work consumption of 640 W, the motor power input for a single-phase induction motor will be roughly 1000 W. In contrast, DC motors require about 30% less power (770 W) and can be readily driven by solar photovoltaic systems (DC). Thus, by presenting solar thermal (required for R600a) and solar photovoltaic power (DC) application for natural refrigerants R290 and R600a, the present work will contribute to a sustainable environment and demonstrate the capabilities of dependable operation with optimal power usage.
{"title":"Analysis on feasibility of solar-powered air conditioning systems using natural refrigerants","authors":"Rakesh Naskar, Ratan Mandal","doi":"10.1680/jnaen.23.00101","DOIUrl":"https://doi.org/10.1680/jnaen.23.00101","url":null,"abstract":"The current research focuses on low-carbon alternatives for air conditioning systems that use sustainable and low-power drives. This detailed research takes into account a 1-ton capacity air conditioning system using several refrigerants based on vapor compression. Natural refrigerants should be used instead of all synthetic ones due to their environmentally favorable properties. Using the CoolPack software platform, the comparative analysis was conducted and it was found that the natural refrigerants R290 and R600a exhibit promising results in terms of heat removal from the evaporator (Qe [kW], heat removal from the condenser (Qc [kW], work done by the compressor (W [kW], and Co-efficient of Performance (COP) when fixed temperatures of 10 °C for the evaporator and 50 °C for the condenser are preserved. For refrigerant R600a, superheating at the compressor (inlet) suction by 5°C is necessary to maintain the running cycle within a practical working zone. Given that a 1-ton vapor compression cycle air conditioning system based on R290 has a compressor work consumption of 640 W, the motor power input for a single-phase induction motor will be roughly 1000 W. In contrast, DC motors require about 30% less power (770 W) and can be readily driven by solar photovoltaic systems (DC). Thus, by presenting solar thermal (required for R600a) and solar photovoltaic power (DC) application for natural refrigerants R290 and R600a, the present work will contribute to a sustainable environment and demonstrate the capabilities of dependable operation with optimal power usage.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141233968","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}
F. Copes, J. Fiocchi, S. Gambaro, C. Bregoli, A. Tuissi, C. Biffi, Diego Mantovani
Biodegradable metals represent a valuable solution for the development of temporary vascular implants. These are expected to dissolve in the body over time, avoiding side effects typical of permanent implants such as thrombosis, in-stent restenosis and chronic inflammation. Iron-based alloys, such as Fe-Mn alloys, are of particular interest for cardiovascular applications due to their intrinsic properties. However, their degradation behaviour and biological performances needs to be improved. Femtosecond laser(fs)-induced surface topography could affect both the degradation and cell-material interaction. In the present work, fs laser-induced patterning was performed on a Fe-Mn20 alloy to tune both the material’s degradation behaviour and its interaction with the biological environment for cardiovascular applications. Processing parameters were varied to select an optimized surface morphology, characterized by linear grooves. Profilometric analysis, scanning electron microscopy and degradation rate analysis were performed on the treated samples. Thereafter, endothelial cells viability test and hemocompatibility assessment were carried out on the selected process conditions. The obtained fs laser-induced linear patterns were demonstrated to decrease the degradation rate and to improve the biological response toward both endothelial cells and blood. These results demonstrate how fs laser-induced patterning is a promising solution for the development of biodegradable metal-based vascular implants.
{"title":"Biological performance of femtosecond laser textured Fe-Mn alloys for vascular applications","authors":"F. Copes, J. Fiocchi, S. Gambaro, C. Bregoli, A. Tuissi, C. Biffi, Diego Mantovani","doi":"10.1680/jnaen.23.00009","DOIUrl":"https://doi.org/10.1680/jnaen.23.00009","url":null,"abstract":"Biodegradable metals represent a valuable solution for the development of temporary vascular implants. These are expected to dissolve in the body over time, avoiding side effects typical of permanent implants such as thrombosis, in-stent restenosis and chronic inflammation. Iron-based alloys, such as Fe-Mn alloys, are of particular interest for cardiovascular applications due to their intrinsic properties. However, their degradation behaviour and biological performances needs to be improved. Femtosecond laser(fs)-induced surface topography could affect both the degradation and cell-material interaction. In the present work, fs laser-induced patterning was performed on a Fe-Mn20 alloy to tune both the material’s degradation behaviour and its interaction with the biological environment for cardiovascular applications. Processing parameters were varied to select an optimized surface morphology, characterized by linear grooves. Profilometric analysis, scanning electron microscopy and degradation rate analysis were performed on the treated samples. Thereafter, endothelial cells viability test and hemocompatibility assessment were carried out on the selected process conditions. The obtained fs laser-induced linear patterns were demonstrated to decrease the degradation rate and to improve the biological response toward both endothelial cells and blood. These results demonstrate how fs laser-induced patterning is a promising solution for the development of biodegradable metal-based vascular implants.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141235593","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}
BiDy composite oxide nanoflakes with the thickness of about 50 nm were synthesized by one-step hydrothermal method. The electrodes modified with BiDy composite oxide nanoflakes exhibit superior electrochemical behavior for detecting L-cysteine using cyclic voltammetry (CV) method. The impact of scan rate, electrolyte, and concentration of L-cysteine for electrochemical behaviors were investigated. A pair of strong quasi-reversible CV peaks are observed at +0.03 V (cvp1) and –0.69 V (cvp1′) with peak current of 171.2 μA and 171.3 μA, respectively for the BiDy composite oxide nanoflake-modified GCE in 0.1 M KCl and 2 mM L-cysteine solution. GCE modified with the BiDy composite oxide nanoflakes displays broad range of linearity (0.001-2 mM) and low detection limit (0.29 μM) for L-cysteine. Using a hydrothermal approach as a synthesis technique for nanoflakes, as well as a facile and sensitive electro-chemical sensor based the nanoflakes was developed to detect L-cysteine, makes it a promising approach for practical application.
{"title":"Synthesis of BiDy composite oxide nanoflakes with good electrochemical properties","authors":"Chenxu Feng, Qianmin Cong, Xiaoyu Wang, Jiayin Cui, Lizhai Pei","doi":"10.1680/jnaen.23.00066","DOIUrl":"https://doi.org/10.1680/jnaen.23.00066","url":null,"abstract":"BiDy composite oxide nanoflakes with the thickness of about 50 nm were synthesized by one-step hydrothermal method. The electrodes modified with BiDy composite oxide nanoflakes exhibit superior electrochemical behavior for detecting L-cysteine using cyclic voltammetry (CV) method. The impact of scan rate, electrolyte, and concentration of L-cysteine for electrochemical behaviors were investigated. A pair of strong quasi-reversible CV peaks are observed at +0.03 V (cvp1) and –0.69 V (cvp1′) with peak current of 171.2 μA and 171.3 μA, respectively for the BiDy composite oxide nanoflake-modified GCE in 0.1 M KCl and 2 mM L-cysteine solution. GCE modified with the BiDy composite oxide nanoflakes displays broad range of linearity (0.001-2 mM) and low detection limit (0.29 μM) for L-cysteine. Using a hydrothermal approach as a synthesis technique for nanoflakes, as well as a facile and sensitive electro-chemical sensor based the nanoflakes was developed to detect L-cysteine, makes it a promising approach for practical application.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141230426","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}
P. Sivasamy, P. Pitchipoo, B. Jegan, K. Karthik, D. Mahadevi, N. Gnanakumar
A novel variant of composite phase change materials (PCMs) has been developed by incorporating 0.5 wt% of Al2O3, SiO2, CuO, and Ag nanomaterials into myristic acid. In this formulation, myristic acid serves as the foundational material, while Al2O3, SiO2, CuO, and Ag are employed as supportive components. The morphology and crystalline structure of the nanomaterials were studied using a field emission scanning electron microscope (FESEM) and X-ray diffraction (XRD) analysis, respectively. The composite phase change materials were fabricated using a two-step process. The phase change properties of the composite phase change materials were assessed using Differential Scanning Calorimetry (DSC). The nanomaterials (0.5 wt% of Al2O3, SiO2, CuO, and Ag) were suspended in myristic acid separately to investigate the heat transfer performance of the composite phase change materials during phase change processes (melting and freezing). The results clearly indicate that the duration of the melting and freezing processes of the composite phase change materials decreased compared to that of the pure phase change material. Thus, the newly prepared composite phase change materials are potential candidates for harvesting solar energy for low-temperature heating applications.
通过在肉豆蔻酸中加入 0.5 wt%的 Al2O3、SiO2、CuO 和 Ag 纳米材料，开发出了一种新型的复合相变材料 (PCM)。在这种配方中，肉豆蔻酸是基础材料，而 Al2O3、SiO2、CuO 和 Ag 则是辅助成分。分别使用场发射扫描电子显微镜（FESEM）和 X 射线衍射（XRD）分析法研究了纳米材料的形貌和晶体结构。复合相变材料采用两步法制备而成。使用差示扫描量热法（DSC）评估了复合相变材料的相变特性。将纳米材料（0.5 wt% 的 Al2O3、SiO2、CuO 和 Ag）分别悬浮在肉豆蔻酸中，研究复合相变材料在相变过程（熔化和冻结）中的传热性能。结果清楚地表明，与纯相变材料相比，复合相变材料的熔化和冻结过程持续时间缩短。因此，新制备的复合相变材料是收集太阳能用于低温加热的潜在候选材料。
{"title":"Effect of nanomaterials on the melting and freezing characteristics of phase change material","authors":"P. Sivasamy, P. Pitchipoo, B. Jegan, K. Karthik, D. Mahadevi, N. Gnanakumar","doi":"10.1680/jnaen.24.00021","DOIUrl":"https://doi.org/10.1680/jnaen.24.00021","url":null,"abstract":"A novel variant of composite phase change materials (PCMs) has been developed by incorporating 0.5 wt% of Al2O3, SiO2, CuO, and Ag nanomaterials into myristic acid. In this formulation, myristic acid serves as the foundational material, while Al2O3, SiO2, CuO, and Ag are employed as supportive components. The morphology and crystalline structure of the nanomaterials were studied using a field emission scanning electron microscope (FESEM) and X-ray diffraction (XRD) analysis, respectively. The composite phase change materials were fabricated using a two-step process. The phase change properties of the composite phase change materials were assessed using Differential Scanning Calorimetry (DSC). The nanomaterials (0.5 wt% of Al2O3, SiO2, CuO, and Ag) were suspended in myristic acid separately to investigate the heat transfer performance of the composite phase change materials during phase change processes (melting and freezing). The results clearly indicate that the duration of the melting and freezing processes of the composite phase change materials decreased compared to that of the pure phase change material. Thus, the newly prepared composite phase change materials are potential candidates for harvesting solar energy for low-temperature heating applications.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141408192","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}
A. Vishwakarma, Ashok Kumar Mishra, C. K. Dixit, L. Yadava
This paper studied the structural, morphological, optical, and X-ray absorption near-edge spectroscopy (XANES) and sensing properties of titanium dioxide (TiO2) thin film. The TiO2 thin film is prepared in the thin film laboratory on a clean glass plate using a physical vapor deposition (PVD) method. The structural, morphological, Optical, and electronic properties of the fabricated samples are presented by X-ray diffraction (XRD), atomic force microscope (AFM), UV-visible, and XANES. It is found from XRD the crystallite size was ∼25.66 nm with microstrain ∼0.0064 using the Williamson-Hall (W-H) plot. The fractal terms such as grain size, roughness, kurtosis, and skewness were estimated using AFM. The grain size lies in the nanometric range and found that ∼77.21 nm. The band gap of the fabricated film is ∼3.23 eV. The XANES analysis is well supported by XRD measurement and the result found that the fabricated TiO2 thin film was anatase phase. The sensing properties of TiO2 are studied for the detection of Liquified Petroleum Gas (LPG) concentration (0-5000 ppm) at room temperature. Results found that the TiO2 film is highly sensitive and is the fast response for LPG gas sensors with a maximum sensitivity of ∼198 %.
{"title":"Local structural and sensing properties of TiO2 thin film using the PVD method","authors":"A. Vishwakarma, Ashok Kumar Mishra, C. K. Dixit, L. Yadava","doi":"10.1680/jnaen.23.00087","DOIUrl":"https://doi.org/10.1680/jnaen.23.00087","url":null,"abstract":"This paper studied the structural, morphological, optical, and X-ray absorption near-edge spectroscopy (XANES) and sensing properties of titanium dioxide (TiO2) thin film. The TiO2 thin film is prepared in the thin film laboratory on a clean glass plate using a physical vapor deposition (PVD) method. The structural, morphological, Optical, and electronic properties of the fabricated samples are presented by X-ray diffraction (XRD), atomic force microscope (AFM), UV-visible, and XANES. It is found from XRD the crystallite size was ∼25.66 nm with microstrain ∼0.0064 using the Williamson-Hall (W-H) plot. The fractal terms such as grain size, roughness, kurtosis, and skewness were estimated using AFM. The grain size lies in the nanometric range and found that ∼77.21 nm. The band gap of the fabricated film is ∼3.23 eV. The XANES analysis is well supported by XRD measurement and the result found that the fabricated TiO2 thin film was anatase phase. The sensing properties of TiO2 are studied for the detection of Liquified Petroleum Gas (LPG) concentration (0-5000 ppm) at room temperature. Results found that the TiO2 film is highly sensitive and is the fast response for LPG gas sensors with a maximum sensitivity of ∼198 %.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140085904","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}
Sujubili Narzary, Sanat Das, P. P. Gohain, K. Chakraborty, M. G. Choudhury, Samrat Paul
Massive efforts have been undertaken for better utilization of solar energy in environmental and energy applications. The creation of environmentally friendly, economically viable, and chemically efficient processes is today's key chemistry challenge. The primary goal of this study is to synthesize and confirm the viability of lead-free halide perovskite for photocatalytic efficiency in the degradation of organic dyes namely, Eosin B and Eosin Y in water solutions when exposed to visible light. Lead-free Cesium Titanium halide Cs2TiX6 (X=Cl, Br) double perovskite compound was successfully synthesized by solution process method. The effective synthesis of perovskite photocatalysts was confirmed by various optical, morphological, and structural characterization techniques such as X-ray diffraction (XRD), UV-visible spectrophotometer, Photoluminescence spectroscopy (PL), Zeta potential, Scanning Electron Microscope (SEM), and Transmission Electron Microscope (TEM).Positive zeta values reveal that the generated photocatalyst is functional with the adsorption of anionic dyes. The photodegradation efficiency of Eosin Y by the synthesized perovskite photocatalysts was substantially higher than that of Eosin B.The photocatalytic degradation efficiency of Cs2TiCl6 and Cs2TiBr6 perovskite photocatalysts for Eosin B is 59.12% and 48.77%, respectively, and 72.35% and 89.94% for Eosin Y.
为了在环境和能源应用中更好地利用太阳能，人们付出了巨大的努力。创造环境友好、经济可行、化学效率高的工艺是当今化学界面临的主要挑战。本研究的主要目标是合成并确认无铅卤化物包晶石在可见光照射下光催化降解水溶液中有机染料（即曙红 B 和曙红 Y）的可行性。利用溶液法成功合成了无铅卤化铯钛 Cs2TiX6（X=Cl，Br）双包晶化合物。各种光学、形态和结构表征技术，如 X 射线衍射 (XRD)、紫外可见分光光度计、光致发光光谱 (PL)、Zeta 电位、扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM)，证实了包晶石光催化剂的有效合成。Cs2TiCl6 和 Cs2TiBr6 包晶光催化剂对曙红 B 的光降解效率分别为 59.12% 和 48.77%，对曙红 Y 的光降解效率分别为 72.35% 和 89.94%。
{"title":"Synthesis and characterization of Cs2TiX6(X=Cl, Br) double perovskites forphotocatalytic dye degradation","authors":"Sujubili Narzary, Sanat Das, P. P. Gohain, K. Chakraborty, M. G. Choudhury, Samrat Paul","doi":"10.1680/jnaen.23.00064","DOIUrl":"https://doi.org/10.1680/jnaen.23.00064","url":null,"abstract":"Massive efforts have been undertaken for better utilization of solar energy in environmental and energy applications. The creation of environmentally friendly, economically viable, and chemically efficient processes is today's key chemistry challenge. The primary goal of this study is to synthesize and confirm the viability of lead-free halide perovskite for photocatalytic efficiency in the degradation of organic dyes namely, Eosin B and Eosin Y in water solutions when exposed to visible light. Lead-free Cesium Titanium halide Cs2TiX6 (X=Cl, Br) double perovskite compound was successfully synthesized by solution process method. The effective synthesis of perovskite photocatalysts was confirmed by various optical, morphological, and structural characterization techniques such as X-ray diffraction (XRD), UV-visible spectrophotometer, Photoluminescence spectroscopy (PL), Zeta potential, Scanning Electron Microscope (SEM), and Transmission Electron Microscope (TEM).Positive zeta values reveal that the generated photocatalyst is functional with the adsorption of anionic dyes. The photodegradation efficiency of Eosin Y by the synthesized perovskite photocatalysts was substantially higher than that of Eosin B.The photocatalytic degradation efficiency of Cs2TiCl6 and Cs2TiBr6 perovskite photocatalysts for Eosin B is 59.12% and 48.77%, respectively, and 72.35% and 89.94% for Eosin Y.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140085180","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}
Prakash S., Suvitha A., A. Steephen, Ajay P., Bradha Madhavan
In the present work, LaFeO3/rGO-based nanocomposites were synthesized using a chemical route. The as-prepared samples were subjected to calcination at 700°C. To classify their structural and morphological properties, the nanocomposites were characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The findings show that the nanocomposites obtained are 20 nm and have undergone diameter changes at 700 ° C after calcination. The XRD analysis reveals that the composites have a strongly crystalline single-phase structure. In addition, Voigt’s theory was used to compute elastic constants such as Young’s modulus (E), Bulk modulus (K), Shear modulus (G), Poisson’s ratio, and linear compressibility. LaFeO3 perovskites computational structural characteristics were also examined. These microwave absorption belongings of LaFeO3/rGO nanocomposites make them appropriate for electromagnetic interference (EMI) shielding usage.
{"title":"Perovskite oxides incorporated with reduced graphene oxide (LaFeO3/rGO) for electromagnetic interference (EMI) shielding","authors":"Prakash S., Suvitha A., A. Steephen, Ajay P., Bradha Madhavan","doi":"10.1680/jnaen.23.00049","DOIUrl":"https://doi.org/10.1680/jnaen.23.00049","url":null,"abstract":"In the present work, LaFeO3/rGO-based nanocomposites were synthesized using a chemical route. The as-prepared samples were subjected to calcination at 700°C. To classify their structural and morphological properties, the nanocomposites were characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The findings show that the nanocomposites obtained are 20 nm and have undergone diameter changes at 700 ° C after calcination. The XRD analysis reveals that the composites have a strongly crystalline single-phase structure. In addition, Voigt’s theory was used to compute elastic constants such as Young’s modulus (E), Bulk modulus (K), Shear modulus (G), Poisson’s ratio, and linear compressibility. LaFeO3 perovskites computational structural characteristics were also examined. These microwave absorption belongings of LaFeO3/rGO nanocomposites make them appropriate for electromagnetic interference (EMI) shielding usage.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140085272","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}
Considering the scarcity for portable water, search for an effective and easy purification technology has been of utmost important. Conventional methods have not been able to match the demands which triggered search for an advanced method based on nanotechnology which can fulfil the desired conditions. Magnetic nanomaterials are among the top runners owing to their unique ability to respond in presence of external magnetic field. Due to small size, they can be easily functionalized and surface tuned for targeting specific ions and dyes. One of the biggest advantages of these materials is that they can be easily separated post treatment. This review, summarizes the latest developments in the field of magnetic nanomaterials in waste water treatment.
{"title":"Recent advances on magnetic nanomaterials in waste water treatment: a review","authors":"Sakshi Deole, S. S. Pati","doi":"10.1680/jnaen.23.00105","DOIUrl":"https://doi.org/10.1680/jnaen.23.00105","url":null,"abstract":"Considering the scarcity for portable water, search for an effective and easy purification technology has been of utmost important. Conventional methods have not been able to match the demands which triggered search for an advanced method based on nanotechnology which can fulfil the desired conditions. Magnetic nanomaterials are among the top runners owing to their unique ability to respond in presence of external magnetic field. Due to small size, they can be easily functionalized and surface tuned for targeting specific ions and dyes. One of the biggest advantages of these materials is that they can be easily separated post treatment. This review, summarizes the latest developments in the field of magnetic nanomaterials in waste water treatment.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140090619","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}
A. Biswal, J. P. Dhal, B. R. Das, P. K. Panda, B. C. Tripathy
A simple electrochemical technique was employed to synthesize nanocorn electrolytic manganese dioxide (EMD) in presence of a structure directing agent poly vinyl pyrollidone (PVP) at optimum concentration in the aqueous acidic manganese sulphate bath. XRD and SEM analyses confirm the formation of MnO2 with nano corn shaped crystals at optimum concentration i.e 20 mg.L−1 of PVP. The finely ground material successfully employed for the removal of toxic dyes chicago sky blue (CSB) and malachite green (MG) from aqueous solution. Various process parameters such as different adsorbents, adsorbent dose, contact time, initial dye concentration and pH were varied and optimised for both the dyes. It was found that EMD20PVP showed 99.61% of adsorption efficiency at an optimum dose of 0.04 g / 20 mL of the 100 mg.L−1 chicago sky blue dye solution at room temperature within 20 minutes. However same EMD20PVP sample showed 99.5% adsorption efficiency at an optimum dose 0.07 g / 20 mL of the 100 mg.L−1 Malachite green dye solution at room temperature within 120 minutes. From the adsorption kinetics study it was concluded that, adsorption process follows pseudo-second order kinetics and adsorption isotherm confirms the reaction follows Langmuir adsorption for both the dyes.
采用一种简单的电化学方法，在最佳浓度下，在酸性硫酸锰溶液中，以结构导向剂聚乙烯软锰酸酯(PVP)的存在下合成纳米玉米电解二氧化锰(EMD)。XRD和SEM分析证实，在最佳浓度为20 mg时，MnO2形成纳米玉米状晶体。PVP的L−1。该材料成功地用于去除水中有毒染料芝加哥天蓝(CSB)和孔雀石绿(MG)。对不同吸附剂、吸附剂剂量、接触时间、初始染料浓度和pH等工艺参数进行了优化。结果表明，EMD20PVP的最佳吸附量为0.04 g / 20 mL，吸附效率为99.61%。L−1芝加哥天蓝染料溶液，室温下放置20分钟。而同样的EMD20PVP样品在100mg的最佳剂量0.07 g / 20ml时，其吸附效率为99.5%。L−1孔雀石绿染料溶液，室温下保存120分钟。吸附动力学研究表明，两种染料的吸附过程符合准二级动力学，吸附等温线证实了吸附过程符合Langmuir吸附。
{"title":"One pot synthesis of nano EMD for effective adsorption of toxic dyes","authors":"A. Biswal, J. P. Dhal, B. R. Das, P. K. Panda, B. C. Tripathy","doi":"10.1680/jnaen.22.00061","DOIUrl":"https://doi.org/10.1680/jnaen.22.00061","url":null,"abstract":"A simple electrochemical technique was employed to synthesize nanocorn electrolytic manganese dioxide (EMD) in presence of a structure directing agent poly vinyl pyrollidone (PVP) at optimum concentration in the aqueous acidic manganese sulphate bath. XRD and SEM analyses confirm the formation of MnO2 with nano corn shaped crystals at optimum concentration i.e 20 mg.L−1 of PVP. The finely ground material successfully employed for the removal of toxic dyes chicago sky blue (CSB) and malachite green (MG) from aqueous solution. Various process parameters such as different adsorbents, adsorbent dose, contact time, initial dye concentration and pH were varied and optimised for both the dyes. It was found that EMD20PVP showed 99.61% of adsorption efficiency at an optimum dose of 0.04 g / 20 mL of the 100 mg.L−1 chicago sky blue dye solution at room temperature within 20 minutes. However same EMD20PVP sample showed 99.5% adsorption efficiency at an optimum dose 0.07 g / 20 mL of the 100 mg.L−1 Malachite green dye solution at room temperature within 120 minutes. From the adsorption kinetics study it was concluded that, adsorption process follows pseudo-second order kinetics and adsorption isotherm confirms the reaction follows Langmuir adsorption for both the dyes.","PeriodicalId":44365,"journal":{"name":"Nanomaterials and Energy","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138625117","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：