A facile and eco-friendly approach using in situ-generated 4-benzenediazonium sulfonate (BDS) was applied to prepare highly functionalized carbon nanotubes (CNTs). The effectiveness of this …
Traditional TiO2 semiconductor is a promising photocatalyst. However, the extended application of this material for nitrogen oxide (NO) removal under sunlight conditions is becoming an emerging topic in materials science. Combining and modifying TiO2 with carbon materials such as carbon nanotube (CNT) towards applying a …
A facile and eco-friendly approach using in situ-generated 4-benzenediazonium sulfonate (BDS) was applied to prepare highly functionalized carbon nanotubes (CNTs). The effectiveness of this functionalization was additionally enhanced by a green and short-time ball milling process applied beforehand. …
Ball-Milling Modification of Single-Walled Carbon Nanotubes: Purification, Cutting, and Functionalization. Noelia Rubio, Noelia Rubio. ... Single-walled carbon nanotubes (SWNTs) can be successfully cut with relatively homogeneous sizes using a planetary mill. The optimized conditions produce highly dispersible SWNTs that can be …
Stainless steel 304L alloy powder and multiwalled carbon nanotubes were mixed by ball-milling under ambient atmosphere and in a broad range of milling times, which spans from 0 to 120 min.
To promote the research on BM-CNMs, this work provides a comprehensive review on recent research development in (1) synthesis of various types of BM-CNMs, (2) effects of ball milling on …
In epoxy nanocomposites with ball milling, Young's modulus and tensile strength were increased by 653% and 150%, respectively, when CNT loading was 1.0 vol%. Additionally, the ball milling of CNTs …
Ball milling of carbon nanotubes. Ball milling was carried out in an agate mortar with a single 5 cm diameter agate ball. The ball milling amplitude was 3 mm and the. Results and discussion. Two different types of nanotube ends can be readily identified using high-resolution TEM; one with open end and the other with closed end. Typical …
The effects of ball milling on cup-stacked carbon nanotubes are summarized as follows. Two different cleavage modes are considered, based on TEM observations. It is expected that the bending mode plays the main role in cleaving carbon nanotubes from the viewpoint of the cup-stacked morphology of these carbon …
Carbon nanotubes (CNTs) are easy to agglomerate, which results in poor structure reproducibility, and seriously restricts the improvement of conductivity and electromagnetic interference (EMI) shielding properties of CNTs composites. ... The ball milling method to achieve a uniform dispersion of CNTs in composites has been …
In Fig. 3. we present the mean nanotube length as a function of milling time.The length decreased from over 2 μm to approx. 950 nm in the first 2 h of the milling, then the rate of change became lower and quasi linear.We could achieve mean lengths of 500, 200 and 140 nm after 120, 170 and 200 h of grinding, respectively.The whole …
During dry ball milling, MWNTs tended to be compacted by the balls and form large agglomerates. The aggregates formed by flattening of nanotubes even after dry milling for 1/2 h, showing multi-layered carbon structures (Fig. 1 a).After 10 h, the nanotubes near the edge of the agglomerates became very smooth (Fig. 1 b). This …
Short multi-wall carbon nanotubes (MWNTs) with open tips were obtained by mechanical ball milling.The microstructure characteristics of MWNTs before and after ball milling were checked by transmission electron microscopy (TEM). The effect of ball milling on the hydrogen adsorption behavior of the MWNTs was studied. The hydrogen …
Carbon nanotubes reinforced pure Al (CNT/Al) composites were produced by ball-milling and powder metallurgy. Microstructure and its evolution of the mixture powders and the fabricated composites were examined and the mechanical properties of the composites were tested.
Semantic Scholar extracted view of "Ball-milling synthesis of ZnO@sulphur/carbon nanotubes and Ni(OH)2@sulphur/carbon nanotubes composites for high-performance lithium-sulphur batteries" by Xingxing Gu et al.
In this paper, we report the use of ball milling with longer time of treatment to reduce the length of the single-walled carbon nanotubes (produced in this case by a …
Therefore, ball-milling is an effective and simple method to increase the surface area of commercial carbon nanotubes without significant changes of their …
Single-walled carbon nanotubes (SWNTs) can be successfully cut with relatively homogeneous sizes using a planetary mill. The optimized conditions produce highly dispersible SWNTs that can be efficiently functionalized in a variety of synthetic ways. As clearly shown by Raman spectroscopy, the millin …
The dependence of multiwall carbon nanotube (MWCNT) length distribution and some nitrogen derived morphological descriptors on various planetary ball milling process parameters was investigated.
Unwound carbon nanotubes: The unwinding of carbon nanotubes (CNTs) is based on wall breaker crushing and ball milling combined, as shown in Figure 1. Briefly, 0.1 g of multi-walled CNTs were dispersed in 200 mL of deionized water in a wall breaker for 30 min, with a 1 min break every 1 min, to avoid overheating.
High-pressure can strongly modify the structural, physical, and chemical characteristics of materials 1,2,3,4, thus has served as a powerful tool for the investigation in materials science 5,6,7 ...
Effect of ball milling on microstructure of carbon nanotubes TEM images of MWNTs before and after ball milling are shown in Fig. 1 in which (a) displayed that the unmilled MWNTs are curved and entangled tubular fibres with outer diameter of 30–40 nm and length of few microns, (b–f) displayed TEM images of the MWNTs underwent ball …
DOI: 10.1016/J.CARBON.2015.04.050 Corpus ID: 93997619; Easy method to prepare N-doped carbon nanotubes by ball milling @article{Soares2015EasyMT, title={Easy method to prepare N-doped carbon nanotubes by ball milling}, author={Olivia Salome G.P. Soares and Raquel P. Rocha and Alexandra Gonçalves and Jos{'e} Lu{'i}s …
Functionalization of the nanotubes was carried out by ball milling multiwalled carbon nanotubes (MWCNTs) in the presence of ammonium bicarbonate. It has been found that the mechanical properties ...
The average length of the ball milled MWNTs, obtained in gram scale, is ca. 0.8 μm. The cleavage was caused by collision between one agate ball and the nanotube powder contained in an agate mortar. The ball milling effect on the morphology of cup-stacked carbon nanotubes have also been studied [15].
Ball milling of carbon nanotubes Ball milling was carried out in an agate mortar with a single 5 cm diameter agate ball. The ball milling 2002 Z. K onya et al. / Carbon 42 (2004) 2001–2008 Fig. 1. HRTEM images of …
The results show that CNTs milled with NH4HCO3 were more effectively disentangled and shortened than those without the chemical. A simple chemo-mechanical method is proposed for in-situ amino functionalization of carbon nanotubes (CNTs). Ball milling in the presence of ammonium bicarbonate (NH4HCO3) allowed introduction of …
In this work, a novel methodology to dope carbon nanotubes with nitrogen by ball milling is proposed. This simple method of obtaining N-CNT can be easily scaled …
indicate that ball milling of carbon nanotubes is a rather complex process and that it can cause several morphological changes to samples besides the well-known cutting effect. 2004 Elsevier Ltd.
Different ball-milling processes for preparing BM-CNMs and modified BM-CNMs with desired particle size, structure, and surface properties are summarized and …
It is demonstrated that unique carbon nanostructures including carbon nanotubes and carbon onions are synthesized by high-speed ball-milling of steel balls. It is considered that the gas-phase reaction takes place around the surface of steel balls under local high temperatures induced by the collision-friction energy in ball-milling process ...
