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by ball milling of graphite with melamine—a nitro-gen-richsolidorganiccompound.Wefoundthatball-milling with N-containing solid organic compounds (e.g., melamine), unlike ball-milling with N-containing inorganic gases, had not only greatly simplified the material fabrication process but also enhanced the doping efficiency. The …
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The invention relates to a method for improving the performance of a YBaCuO bulk superconductor by doping BaCeO3, which is characterized in that BaCe[1-x]GdxO3 powder with the average particle size between 1 and 100 nanometers is added into Y1.8Ba2.4Cu3.4Oy powder; a single axle is used for compression molding forming after grinding and uniform …
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) via ball milling are investigated. The results not only show significant decreases in the decomposition temperatures (T dec) and activation energies (E A) of the first two dehydrogenation reaction steps of LiAlH 4 by doping with TiO 2 or TiCl 3, but also reveal how each Ti precursor affects the dehydrogenation process. Although doping ...
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TiO2 photocatalysis is been widely studied for air and water purification applications; titanium dioxide is the most used semiconductor principally because its low cost, stability and chemical properties. However it only utilizes the UV portion of the solar spectrum as an energy source (less than 4% of the total sunlight energy). This behavior is due to its high band gap value of 3.2 eV.
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MoS 2 was put in a planetary ball-milling machine within steel vessel. The machine was operated at 425 rpm and the rotation direction changed every 30 min. To evaluate the influence of ball-milling time, 1.0 g commercial MoS 2 was blended with 100 g balls for 0, 1, 2, 5 h and named 0-MoS 2, 1-MoS 2 2-MoS 2, and 5-MoS 2, respectively.
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In this paper, we found that the first hydrogenation properties of TiFe alloy can be significantly improved by ball milling, cold rolling and doping. The samples by ball milling for 60 min and doped with (Zr + 2Cr) as additive showed a faster hydrogenation kinetics and the sample cold rolled for 5 passes showed the highest hydrogen capacity.
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Particu- and ball-to-powder mass ratio, the main objective of this larly, doping of TiO2 with transition metal ions was article was to study, in detail, the influence and the corre- reported [14, 15] as being a good strategy to improve lation between milling rotation speeds with structural and photocatalytic properties and for the enhancement ...
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Ball milling [21] is one of them it is a simple, inexpensive, fast method that is easily, produces high-purity nanomaterials and usage in a larger scale for industrial applications. The overarching goal of this work is to investigate diluted magnetic semiconductors, a
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The N-doped biochar was prepared by ball milling 1.8 g biochar samples with 18 mL ammonium hydroxide (29%). The amount of agate balls (180 g), the parameters used for ball milling were all kept the same as the production of ball-milled biochar.
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The critical prerequisite for realizing the industrial application of photocatalytic technology lies on developing efficient photocatalyst through reasonable and large-scale modification strategy. Herein, the rapid and solvent-free high-energy ball-milling procedure was adopted to modify graphitic carbon nitride (g-C3N4) on a large-scale by phosphorus (P) atom doping and …
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Doping metallic particles refined the microstructure and suppressed the growth of interface IMC and resulted in the formation of new compounds. ... Ball milling was performed for 30 h with a 20 min cooling for every 30 min milling. The milled powders were taken every 5 h interval to check the progress of alloying.
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Electrochemical imaging of endothelial permeability using a large-scale integration device containing 400 electrodes. An endothelial monolayer was cocultured with cancer spheroids, and the endothelial permeability was monitored to evaluate the metastasis of the cancer spheroids. The developed method is a promising tool for organs-on-a-chip and drug screening in vitro. …
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A N-enriched porous carbon/SiO 2 (SiO 2 /NC) composite from rice husks was prepared by ball milling and tested as a stable anode for lithium ion batteries (LIBs), in which the homogeneous dispersion of SiO 2 nanoparticles and carbon matrix, and high level of N-doping can be realized simultaneously. The influence of N-doping on a series of SiO 2 /NCs was …
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indicates the occurrence of the ball-milling-induced edge-doping of graphite/graphene [14]. Figure 2b shows Raman spectra of the graphite before and after ball milling. As can be seen, ball-milling dramatically increased the D band with respect to the G band, indicating a significantly increased number of defect sites induced by the ball ...
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Escherichia coli abatement was studied in liquid phase under visible light in the presence of two commercial titania photocatalysts, and of Fe- and Al-doped titania samples prepared by high energy ball-milling. The two commercial titania photocatalysts, Aeroxide P25 (Evonik industries) exhibiting bo …
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The accurate doping of nitrog … Low-cost and efficient multifunctional electrodes play an important part in promoting the practical application of energy conversion and storage. Herein, we report the facile synthesis of N-graphyne, with a novel structure, by one-step ball milling of …
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10%Ball milling is effective in inducing chemical reactions, which do not normally happen at room temperature, 15 and is a versatile technique for the production of a range of materials. 16 In this work, we have systematically studied thermoelectric performance of Ga-doped ZnO thermoelectric oxide as a function of synthesis conditions and techniques.
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Herein, we report the facile synthesis of N-graphyne, with a novel structure, by one-step ball milling of CaC 2 and pyrazine. The accurate doping of nitrogen atoms at the controllable sites of the molecular skeleton of γ-graphyne was achieved using the …
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Dive into the research topics of 'Bismuth doping of induction furnace synthesized Mg2Si, Mg2Sn and Mg2Ge thermoelectric compounds'. ... the most common is a solid-state mechanical alloying, using ball milling. In such synthesis approaches, Mg volatility was compensated upon the introduction of excess Mg into the ...
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graphene materials by ball milling and their applications in energy conversion and storage Functionalized milling graphene nanoplatelets by ball Ball edge-functionalized milling is a simple but efficient approach for produc-graphene nanoplatelets. In a typical experiment, graphite powders are mixed with chemicals xide
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The susceptibility of amorphization in boron carbide with B 4 C stoichiometry could be explained by its atomic configuration. B 4 C can be described using a rhombohedral unit cell, consisting of the 12-atom icosahedra connected via the 3-atom chains. The dominant polymorph is thought to be B 11 C p (CBC), where the C atom in the icosahedra occupies the polar sites …
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ZnO oxide was widely studied for this purpose; however, the doping effect on its antibacterial properties is still not satisfactory. In this context, the present work aimed to prepare a series of mesoporous ZnO doped with different neodymium (Nd) loading using a ball-milling method and examine their antibacterial activities against gram ...
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The fine cathode material of LiFePO4/MWCNTs composite was synthesized by ball milling. XRD demonstrated that the particle size of material was smaller when it was milled more time. And SEM showed that the MWCNTs was decentralized into the grains of LiFePO4. The electrochemical performance of the composite electrodes milled 12h exhibited best …
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Effect of gallium doping and ball milling process on the thermoelectric performance of n-type ZnO . Abstract . We report a systematic investigation of the thermoelectric properties of n-type Ga-doped ZnO synthesized using different ball milling conditions. Samples fabricated by the high-energy ball milling resulted in a
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Ball milling from elemental Ti-Co-Si-B powder mixtures was performed in a planetary Fritsch P-5 mill (Fritsch , Idar-Oberstein, Germany) under argon atmosphere using WC-6Co vials (225 mL) and balls (19 mm diameter), rotary speed of 300 rpm and a ball-to-powder weight ratio of 10:1. To understand the effect of milling time on phase
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CN108493479B CN201810303683.6A CN201810303683A CN108493479B CN 108493479 B CN108493479 B CN 108493479B CN 201810303683 A CN201810303683 A CN 201810303683A CN 108493479 B CN108493479 B CN 108493479B Authority CN China Prior art keywords solid electrolyte sulfide solid quartz tube ball milling lithium Prior art date Legal status …
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range of x = 0 to 1 to study the effect of Ni doping. The mixture was mixed by wet ball milling in acetone, and then subjected to calcination at temperatures of 1000 and 1100 °C for 3 h. The obtained pigments were grounded in a mortar, washed 3 It is evident that the XRD patterns of both pigments are times with de-ionized water and
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In this study Al doping along with ball milling were explored to stabilize the cubic phase of LLZO and improve densification, while reducing the amount of impurity phases. Samples were synthesized from the precursors Li2CO3, Al2O3, La2O3, and ZrO2 by ball milling followed by heat treatment for 12 hours at 1000°C.
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Ball milling of ammonothermally synthesized GaN powders was performed in an ethanol solution for a variety of durations, resulting in average particle sizes of nanometer. The ball milled powders showed an obviously brightened color and improved dispersability, indicating reduced levels of aggregation. X-ray diffraction (XRD) peaks of the ball milled GaN powders …
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L-S) process [21, 22]. Al-doping However, these processes generally require high demands of temperature and, most importantly, time, making the implementation difficult. Furthermore, the low yields from the high-energy ball-milling and S-L-S processes leave reactive hot-pressing the only realistic route for producing X-doped boron carbide.
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Effects of carbon support doping with phosphorus, nitrogen and sulfur, as well as of changes in textural properties by ball milling, on the catalytic activity of palladium catalysts were investigated in the Suzuki–Miyaura and Mizoroki–Heck reactions. Contributions of the heteroatom doping and specific surface area of the carbon supports to ...
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