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Effect of Ball-Milling on the Oxygen Reduction Reaction Activity of

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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Simple ball milling-assisted method enabling N-doped carbon …

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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N-doped biochar synthesized by a facile ball-milling method for

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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Hydrogenation/dehydrogenation in MgH2-activated carbon …

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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Easy method to prepare N-doped carbon nanotubes by ball milling

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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Recent advances in mechanochemical production of chemicals and carbon

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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Beneficial utilization of ball-milled carbon sand to activate

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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Increased chemisorption onto activated carbon after ball-milling

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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Prepared Fe3O4/rSCCO-700 by ball milling-roasting method from …

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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Mechanism of ball milled activated carbon in improving the

We adopted a simple processing method, ball milling, to produce ball milled AC (BAC) to improve the physical and electrochemical properties of the original AC and …

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N-doped biochar synthesized by a facile ball-milling method for

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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Reactive ball-milling synthesis of Co-Fe bimetallic catalyst for

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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Ball milling-assisted preparation of N-doped biochar loaded with

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. ... Obvious peak of carbon at 18.23° of BC was corresponded to non-crystalline carbon. After ball milling ...

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Green Oxidation of Carbon Black by Dry Ball Milling

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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High-efficiency synthesis of Co, N-doped carbon nanocages by ball

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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Effect of Ball Milling on the Electrochemical …

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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(PDF) Characterization of Ball-Milled Bamboo-Based Activated Carbon

Ball-milling treatment for 150 min produced activated carbon of 449 nm in size and a particle distribution index (PDI) score of 0.66. Ball milled activated carbon from the experiment had a pore ...

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Ball milling of pyrolytic residue from oil sands with MnO

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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Effect of ball milling energy and carbon content on …

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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Ball milling combined with activation preparation of honeycomb …

After ball milling, combined with KOH activation, a honeycomb-like porous carbon with a cellular porous cavity structure can be observed from the SEM images of the PSMC-x samples (Fig. 3a–f) due to the increase in specific surface area of PSMC and uniform contact with KOH, which is favorable for the efficient utilization of the active surface ...

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Sustainable Preparation of Nanoporous Carbons via Dry Ball …

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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Effect of Ball Milling on the Electrochemical …

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-assisted preparation of N-doped biochar loaded with

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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Improving capacity and rate capability of Li-ion cathode materials

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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CuS loaded on reduced graphene oxide prepared by ball milling …

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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Innovative methods of ball milling to grind activated carbon as an

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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Preparation of defect-rich, N-doped activated carbons via

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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Ball milling-assisted synthesis and electrochemical performance of

In a typical process, 0.520 g of C 6 H 12 N 4, 1.0–7.0 g of FeCl 3 ·6H 2 O and 5 mL of acetone were firstly mixed by ball-milling for 1 h at 320 rpm. The obtained mixture was then dried at room temperature for 1 h and dried at 60 °C for 3 h to form the precursors, which were denoted as Ps-x, where x represents the amount of FeCl 3 ·6H 2 O. Afterward, Ps-x were …

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Synthesis of TiO2-Carbon Nanotubes through ball-milling method …

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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Recent Advances in Ball-Milled Materials and Their Applications …

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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