Designing Fe-carbon catalyst with multiple active sites for persulfate (PS) activation to water purification is challenging. Herein, nitrogen-doped biochar (NBC) loaded with ferrous sulfide (FeS) was synthesized via two-step ball milling. ... effective and low-price characteristics [30]. Ball milling mainly utilizes external mechanical force to ...
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Ball milling is a feasible and promising method of biochar modification that can significantly increase its adsorption ability to methylene blue (). This study synthesized nine biochars derived from water hyacinth under different pyrolysis temperatures and modified with ball milling and Fe3O4. The structural properties of the pristine and ball-milled magnetic biochars …
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A sustainable and green method is presented in this paper to produce highly oxidized carbon black using dry ball milling. The mechanical energy by colliding milling balls is able to easily break and build chemical …
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Furthermore, ammonium hydroxide as the N-containing liquid is for the first time used in the synthesis of N-doped carbon materials via the ball-milling method. The main objective of this paper is to incorporate N-related groups to biochar via balling milling with ammonium hydroxide and evaluate the sorption performance of N-doped biochar to CO ...
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Compared with traditional wet processing, mechanical milling method requires much shorter time and avoids the use of toxic reagents and complicated procedures. ball milling also shows an excellent ability for simple, green, one-pot mechanosynthesis of carbon materials with active sites such as heteroatoms and metal elements.
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In present paper, three innovative ball milling units/machines are developed to crush electrode material into fine powder. The ultra capacitor are manufactured from this crushed electrode …
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Catalytic hydrogenation of CO 2 using renewable hydrogen not only reduces greenhouse gas emissions, but also provides industrial chemicals. Herein, a Co-Fe bimetallic catalyst was developed by a facile reactive ball-milling method for highly active and selective hydrogenation of CO 2 to value-added hydrocarbons. When reacted at 320 °C, 1.0 MPa and …
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This study explores the microstructure modification of commercial activated carbon through mechanical ball milling, proving its efficacy in increasing sodium-ion energy …
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The samples were prepared from commercial available magnesium hydride (sigma-aldrich) and microporous activated carbon (AC) with BET specific surface area of 1174 m 2 g −1 (Calgon Carbon Company). Before being mixed with AC additives, MgH 2 powder was premilled under 5.5 bar H 2 for 2 h in the sealed vial of a high energy SPEX 8000 vibration ball mill with …
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Several TiO 2-carbon nanotube composites were prepared by ball milling procedure. Prepared materials were characterized by several techniques, including N 2 equilibrium adsorption isotherms, thermogravimetric analysis, elemental analysis, X-ray diffraction spectra and transmission emission microscopy, and tested in the mineralization of oxamic acid …
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Uniform distribution of de-agglomerated particles of carbon black on the active material in the slurry is crucial for establishing a conductive network around the active particles and for improving the adhesion of the electrode to the current collector. Herein, we demonstrate that pre-mixing of carbon black and LiFePO 4 via dry ball-milling ...
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A common strategy to enhance electronic conductivity is to employ various routes for carbon coating of the particles of the active material as it can provide facile electron migration through the material to the current collector. ... It is evident that both particle size reduction through ball milling and carbon coating through carbonization ...
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A homogeneous slurry was formed by blending the active material (80%), activated carbon (10%), and PVDF (10%) with a suitable quantity of N-methyl-2-pyrrolidone (NMP). ... After ball milling process the sp 2 carbon network in graphite disrupts creating defects and a significant amount of it gets bonded to the oxygen groups.
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In this work, a cost effective and easy method to prepare N-doped carbon nanotubes by ball milling was developed, which avoids the use of solvents and production of wastes. ... Metal-free carbon nanomaterials become more active than metal catalysts and last longer. J Phys Chem Lett, 1 (14) (2010), pp. 2165-2173. Crossref View in Scopus Google ...
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N-doped, defect-rich activated carbons (ACs) were prepared using high-energy ball milling (BM) followed by a heat treatment to prepare metal-free, highly active carbon-based electrocatalysts. To investigate the effect of milling process on the physicochemical and electrochemical properties, a series of milling durations ranging from 2.5 to 15 min were …
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With the extension of ball milling time, the AN removal rate showed an upward trend. When the ball milling time was 50 min, the AN removal rate reached higher than 80%, and the residual TPH content decreased significantly. Prolonging ball milling time could break PROS more completely and expose more active sites.
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The functionalized ACs could be simply obtained by the addition of modifiers during a ball milling process. Carbon quantum dots prepared by ball milling a mixture of ACs and KOH followed by an ultrafiltration purification had a large amount of oxygen-containing functional groups confirmed by the stretching vibrations of –OH, –C=O, and –C ...
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In this study, ball milling was employed to adjust the microstructure of activated carbon to enhance sodium storage capacity. Post-ball milling, there is a notable increase in closed-pore volume from 0.024 to 0.105 cm 3 g −1 and a significant enhancement in the graphitized structure. Consequently, the sodium storage capacity of the platform ...
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Iron- and nitrogen-doped carbon-based catalysts are one of the most promising alternatives to platinum-group metal-based ones currently used in the fuel cell industry. Here, we study the effect of ball-milling conditions and compositions of catalyst precursors comprising a silicon carbide-derived carbon (CDC) on the properties of the final catalysts, most importantly …
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Ball-milling transforms the highly porous and disordered lattice of activated carbon to graphitic structure simultaneously introduce bulk-phase oxygen due to the carbon atom …
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Activated carbon (AC) with a very high specific surface area of >3000 m2 g−1 and a number of course particles (average size: 75 µm) was pulverized by means of planetary ball milling under ...
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Ball milling is considered as a scalable solvent-free technique for introducing S atom into a carbon matrix, owing to its low energy input [1], [16], [17]. During the ball milling process, cleavage of C–C bonds and formation of C–S bonds can be easily achieved via energy transfer from the fast-moving balls to the mixture system.
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Abstract: Designing Fe-carbon catalyst with multiple active sites for persulfate (PS) activation to water purification is challenging. Herein, nitrogen-doped biochar (NBC) loaded with ferrous sulfide (FeS) was synthesized via two-step ball milling. In FeS@NBC BM /PS system, both electron transfer process and reactive oxygen species (ROSs) including SO 4 ⋅ −, O ⋅ H, …
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Recently, a ball-milling method has been devised to eco-friendly produce N-doped carbon materials (e.g., graphene) [19], [20], [21]. Ball milling uses the kinetic energy of moving balls to break chemical bonding and produce new surfaces by fracturing feedstock particles [22], [23]. To the best of the authors' knowledge, none of the previous ...
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In this work, a simple, low-cost and energy-saving ball milling method is developed for the synthesis of material that CuS anchored on reduced graphene oxide. During the milling process, the formation of CuS and the reduction of GO occurred simultaneously, which ensured the dispersion of CuS on rGO and obtained CuS@rGO.
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The possible mechanism of the ball milling in a nitrogen atmosphere to act as an effective process in the synthesis of a N-doped graphite catalyst is that the mechanical ball milling process introduces active sites such as unpaired bonds during the milling, resulting in nitrogen covalent bonding to the carbon surface. 8
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In this work, we synthesized new materials based on Fe(II) phthalocyanine (FePc), urea and carbon black pearls (BP), called Fe-N-C, as electrocatalysts for the oxygen reduction reaction (ORR) in neutral solution. The electrocatalysts were prepared by combining ball-milling and pyrolysis treatments, which affected the electrochemical surface area (ECSA) and …
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This study investigates the short time ball milling effect on surface properties of activated carbon. (AC) produced from mangosteen peels (MP) waste and its subsequent …
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After the ball milling, the viscous mixture was dried in an oven at 120 °C for 12 h, and then heated to 280 °C for 20 h at a heating rate of 2 °C/min in air to obtain a ball-milling precursor. The precursor was heated to 500 °C at a heating rate of 3 °C/min in an 5 % H 2 /Ar atmosphere and kept for 10 h to obtain Na 4 Fe 3 (PO 4) 2 P 2 O 7 ...
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The surface properties and coordination environment of carbon support often impact the interface structure between the carbon support and active Pt species, ... As ball-milling time rose, the sp 3 C component increased from 12.2% (G) to 21.9% (DG-30), ...
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In addition, it was adjusted to 2.5, 5.0, 10.0, and 20.0 wt% to optimize the carbon content according to each ball milling method. As a result, the ball-milling method and carbon content functioned as factors that significantly influenced the performance of the thermal cell cathode material, FeF 3 /AB. In particular, (L) displayed a remarkable ...
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We propose a sustainable route to produce nanoporous carbon materials with a high−surface area from commercial graphite using a dry ball−milling procedure through a …
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We report the design and fabrication of Co, N-doped carbon nanocages by the ball milling-hard template method. This synthesis method consists of two key points. First, potassium chloride (KCl) with a cubic crystal structure is used as the hard template. Second, ball milling is an effective method to uniformly cover the precursor on the surface ...
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Activated carbon (AC) with a very high specific surface area of >3000 m2 g−1 and a number of course particles (average size: 75 µm) was pulverized by means of planetary ball milling under ...
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Ball milling significantly stimulated the activity of endogenous components in carbon sands and exposed metal oxides, OFGs and structural defects on the surface of the material. The MnO 2-assisted ball milling further increased the above active sites and enhanced the catalytic activity of MnBMCS. This work proposes a simple and environmentally ...
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Activated carbon (AC) with a very high specific surface area of >3000 m2 g−1 and a number of course particles (average size: 75 µm) was …
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Although it provides more active sites, it also causes the lithium ions embedded in the anode are unable to be removed and also low conductivity, further resulting in the cycle performance and rate performance are poor. ... In summary, ferrous oxalate was used to reduce the oxidized spend carbon cathode by ball milling-roasting method.
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The milling process gave rise to activated carbon with higher iodine number and methylene blue adsorption compared to non-milling activated carbon. The ball milling process also decreased …
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The findings confirm that the combination of the ball-milling mixing and the use of PVP carbon precursor enables the optimal Si@C-2 composite to have a N-doped carbon embedding structure and a robust interface Si-O-C chemical bond bonding, hence obtaining enhanced conductivity, high electrochemical kinetics and superb structure stability during ...
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