Performance Vs Convenience of Magnetic Carbon-Metal Nanocomposites: A Low-Cost and Facile Citrate-Derived Strategy for Feco Alloy/Carbon Composites with High-Performance Microwave Absorption

2017 ◽  
Vol 37 (6) ◽  
pp. 301-326 ◽  
Author(s):  
Wenlei Chu ◽  
Chunhua Tian ◽  
Ying Wang ◽  
Jiayu Chu ◽  
Zhigang Li ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
High Performance ◽  
Low Cost ◽  
Carbon Composites ◽  
Feco Alloy ◽  
Magnetic Carbon ◽  
Alloy Carbon ◽  
Metal Nanocomposites

Wheat straw-derived magnetic carbon foams: In-situ preparation and tunable high-performance microwave absorption

Nano Research ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1423-1429 ◽  
Author(s):  
Guangjun Gou ◽  
Fanbin Meng ◽  
Huagao Wang ◽  
Man Jiang ◽  
Wei Wei ◽  
...  
Keyword(s):  
Wheat Straw ◽  
Microwave Absorption ◽  
High Performance ◽  
In Situ Preparation ◽  
Carbon Foams ◽  
Magnetic Carbon

scholarly journals FeCo Nanoparticle-Loaded Nutshell-Derived Porous Carbon as Sustainable Catalyst in Al-Air Batteries

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
A. Sumboja ◽  
B. Prakoso ◽  
Y. Ma ◽  
F. R. Irwan ◽  
J. J. Hutani ◽  
...  
Keyword(s):  
Surface Area ◽  
High Performance ◽  
Nitrogen Doping ◽  
Low Cost ◽  
High Energy ◽  
Large Surface Area ◽  
High Energy Density ◽  
Active Surface Area ◽  
Peanut Shell ◽  
Feco Alloy

Developing a high-performance ORR (oxygen reduction reaction) catalyst at low cost has been a challenge for the commercialization of high-energy density and low production cost aluminium-air batteries. Herein, we report a catalyst, prepared by pyrolyzing the shell waste of peanut or pistachio, followed by concurrent nitrogen-doping and FeCo alloy nanoparticle loading. Large surface area (1246.4 m2 g-1) of pistachio shell-derived carbon can be obtained by combining physical and chemical treatments of the biomass. Such a large surface area carbon eases nitrogen doping and provides more nucleation sites for FeCo alloy growth, furnishing the resultant catalyst (FeCo/N-C-Pistachio) with higher content of N, Fe, and Co with a larger electrochemically active surface area as compared to its peanut shell counterpart (FeCo/N-C-Peanut). The FeCo/N-C-Pistachio displays a promising onset potential of 0.93 V vs. RHE and a high saturating current density of 4.49 mA cm-2, suggesting its high ORR activity. An aluminium-air battery, with FeCo/N-C-Pistachio catalyst on the cathode and coupled with a commercial aluminium 1100 anode, delivers a power density of 99.7 mW cm-2 and a stable discharge voltage at 1.37 V over 5 h of operation. This high-performance, low-cost, and environmentally sustainable electrocatalyst shows potential for large-scale adoption of aluminium-air batteries.

scholarly journals Coaxial MoS2@carbon Hybrid Fibers: A Low-Cost Anode Material for High-Performance Li-Ion Batteries

2017 ◽  
Author(s):  
Rui Zhou ◽  
Jian-Gan Wang ◽  
Hongzhen Liu ◽  
Huanyan Liu ◽  
Dandan Jin ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Specific Capacity ◽  
Rate Capability ◽  
High Rate ◽  
Carbon Substrate ◽  
Carbon Composites ◽  
Li Ion Batteries ◽  
Hybrid Fibers ◽  
Li Ion

A low-cost bio-mass-derived carbon substrate has been employed to synthesize MoS2@carbon composites through a hydrothermal method. Carbon fibers derived from natural cotton provide a three-dimensional and open framework for the uniform growth of MoS2 nanosheets, thus constructing hierarchically coaxial architecture. The unique structure could synergistically benefit fast Li-ion and electron transport from the conductive carbon scaffold and porous MoS2 nanostructures. As a result, the MoS2@carbon composites, when served as anodes for Li-ion batteries, exhibit a high reversible specific capacity of 820 mAh g-1, high-rate capability (457 mAh g-1 at 2 A g-1), and excellent cycling stability. The superior electrochemical performance makes the MoS2@carbon composites to be low-cost and promising anode materials for Li-ion batteries.

A sustainable strategy to fabricate porous flower-like magnetic carbon composites for enhanced microwave absorption

2021 ◽  
Vol 129 (24) ◽  
pp. 244101
Author(s):  
Xihua Wang ◽  
Xiaolin Li ◽  
Jin Cui ◽  
Li Huang ◽  
Ye Yuan
Keyword(s):  
Microwave Absorption ◽  
Carbon Composites ◽  
Magnetic Carbon

V2O3 nanofoam@activated carbon composites as electrode materials of supercapacitors

2017 ◽  
Vol 10 (06) ◽  
pp. 1750077 ◽  
Author(s):  
Xun Zhang ◽  
Zhonglin Bu ◽  
Rui Xu ◽  
Bing Xie ◽  
Hong-Yi Li
Keyword(s):  
Activated Carbon ◽  
Specific Capacitance ◽  
High Performance ◽  
Electrode Materials ◽  
Low Cost ◽  
Rate Capability ◽  
Mesoporous Structure ◽  
Carbon Composites ◽  
Supercapacitor Application ◽  
Ion Intercalation

Electrode materials with high performance and low cost are demanding in supercapacitor applications. Novel V2O3 nanofoam@activated carbon composites have been prepared simply and cost-efficiently. Due to the mesoporous structure and high specific surface of V2O3 nanofoam and the good electric conductivity of activated carbon, the obtained composites exhibit an obviously improved specific capacitance as high as 185[Formula: see text]F/g, which overpasses bulk V2O3 (119[Formula: see text]F/g) and activated carbon (113[Formula: see text]F/g). The rate capability of V2O3 nanofoam@activated carbon composites has also been improved, owing to the increased electron transport accelerated by the activated carbon and the fast electrolyte ion intercalation/deintercalation facilitated by mesopores of V2O3 nanofoam. The composites retain 56% of initial specific capacitance when the current density increases from 0.05[Formula: see text]A/g to 1.0[Formula: see text]A/g. Therefore, the obtained V2O3 nanofoam@activated carbon composites are low-cost electrode materials with obviously improved electrochemical performance, which are idea for supercapacitor application.

Comparison of UV- and Derivative-Spectrophotometric and HPTLC UVDensitometric Methods for the Determination of Amrinone and Milrinone in Bulk Drugs

2020 ◽  
Vol 16 (3) ◽  
pp. 246-253
Author(s):  
Marcin Gackowski ◽  
Marcin Koba ◽  
Stefan Kruszewski
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
High Performance ◽  
Low Cost ◽  
Uv Spectra ◽  
Derivative Spectrophotometry ◽  
Therapeutic Monitoring ◽  
Bulk Drug ◽  
Layer Chromatography ◽  
Standard Solutions

Background: Spectrophotometry and thin layer chromatography have been commonly applied in pharmaceutical analysis for many years due to low cost, simplicity and short time of execution. Moreover, the latest modifications including automation of those methods have made them very effective and easy to perform, therefore, the new UV- and derivative spectrophotometry as well as high performance thin layer chromatography UV-densitometric (HPTLC) methods for the routine estimation of amrinone and milrinone in pharmaceutical formulation have been developed and compared in this work since European Pharmacopoeia 9.0 has yet incorporated in an analytical monograph a method for quantification of those compounds. Methods: For the first method the best conditions for quantification were achieved by measuring the lengths between two extrema (peak-to-peak amplitudes) 252 and 277 nm in UV spectra of standard solutions of amrinone and a signal at 288 nm of the first derivative spectra of standard solutions of milrinone. The linearity between D252-277 signal and concentration of amironone and 1D288 signal of milrinone in the same range of 5.0-25.0 μg ml/ml in DMSO:methanol (1:3 v/v) solutions presents the square correlation coefficient (r2) of 0,9997 and 0.9991, respectively. The second method was founded on HPTLC on silica plates, 1,4-dioxane:hexane (100:1.5) as a mobile phase and densitometric scanning at 252 nm for amrinone and at 271 nm for milrinone. Results: The assays were linear over the concentration range of 0,25-5.0 μg per spot (r2=0,9959) and 0,25-10.0 μg per spot (r2=0,9970) for amrinone and milrinone, respectively. The mean recoveries percentage were 99.81 and 100,34 for amrinone as well as 99,58 and 99.46 for milrinone, obtained with spectrophotometry and HPTLC, respectively. Conclusion: The comparison between two elaborated methods leads to the conclusion that UV and derivative spectrophotometry is more precise and gives better recovery, and that is why it should be applied for routine estimation of amrinone and milrinone in bulk drug, pharmaceutical forms and for therapeutic monitoring of the drug.

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