Cr as a key factor for direct synthesis of multi-walled carbon nanotubes on industrial alloys

Sano, Noriaki; Yamamoto, S.; Tamon, Hajime

doi:10.1016/j.cej.2013.12.073

Cited by 22 publications

(17 citation statements)

References 32 publications

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“…Summary Pretreatment Oxidation-reduction Oxidation of substrate in air [13,[39][40][41]/O 2 [14]/humid air [9] in the temperature range of 500-1000 °C, followed by heat treatment in H 2 or in an inert atmosphere.…”

Section: Methodsmentioning

confidence: 99%

“…Carbon nanotube on metal substrate materials have been developed on sheet or powder substrates or mesh screens with large openings [2,8,9]. A substantial number of studies have been conducted to understand the CNT growth mechanism, characterize the quality of CNT, and evaluate potential applications of CNTM by considering their mechanical and electrical properties [7,[9][10][11][12][13][14]. However, to the best of our knowledge, the development of CNTM on suitable porous or mesh screen substrates, as a method for membrane fabrication, has not been investigated.…”

Section: Introductionmentioning

confidence: 99%

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Robust carbon nanotube membranes directly grown on Hastelloy substrates and their potential application for membrane distillation

Ashraf

Salih

Nam

et al. 2016

Carbon

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A new class of robust carbon nanotube (CNT) membranes is developed using a scalable chemical vapor deposition method by direct growth of the CNT on a nickel alloy (Hastelloy) mesh with micrometer-sized openings. The developed membranes have a dense, entangled network of CNT with 50-500 nm pore openings and are superhydrophobic. These CNT membranes are resistant to air oxidation up to ~500 °C and chemical corrosion in concentrated HCl or NaCl solutions. Adhesion and utrasonication tests suggest that the developed CNT membranes are resistant to delamination and demonstrate a high interfacial bonding of the grown CNT with the alloy substrate. Potential application of the developed CNT-Hastelloy membranes for separation is explored by conducting membrane distillation tests using a 10,000 mg/L NaCl solution. The developed membranes show similar salt rejection performance compared with a carbon bucky paper membrane. These robust carbon nanotube membranes are reusable and expected to be less susceptible to fouling because of their superhydrophobic properties. Furthermore, if fouled, they can be regenerated by heating in air or using an acid wash.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Robust carbon nanotube membranes directly grown on Hastelloy substrates and their potential application for membrane distillation

Ashraf

Salih

Nam

et al. 2016

Carbon

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“…Hierarchical structured reactors based on the growth of CNTs and CNFs on different metallic host matrix has been reported by several groups nowadays. [130][131][132][133][134][135][136] The advantages of As specified before the use of metallic substrates has the advantage that it is not necessary to deposit additional metal catalyst for CNT/CNF growth. The metallic substrate itself after appropriate pre-treatment, such as calcination, is able to catalyze the growth of CNTs/CNFs.…”

Section: Cnf/cnt On Metallic or Oxide Ceramic Foammentioning

confidence: 99%

Hierarchically structured reactors containing nanocarbons for intensification of chemical reactions

García‐Bordejé

Liu

et al. 2017

J. Mater. Chem. A

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“…Modifying the synthesis conditions allows tuning of the geometry, alignment, density, and structure of CNTs, which offers control over their mechanical performance [5,6,7,8,9,10]. CNT forests grown directly on metal substrates, and specifically on steels, are particularly interesting because they offer a conformal coating solution, which is independent from the substrate’s geometry [11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36]. Direct growth avoids the need for intermediate adhesive layers, thus enabling a robust contact interface between the CNTs and the metal [12].…”

Section: Introductionmentioning

confidence: 99%

“…This method is commonly used for CNT forest growth on metal substrates [12,15,25,34]. Most literature on CNTs grown on metallic substrates, either in the form of aligned forests or non-aligned CNTs, focuses on the synthesis methods [11,15,18,19,20,21,22,23,24,25,37]. Few reports characterize the super-hydrophobicity of CNTs [33,34,35], their corrosion resistance [33,38], field-emission properties [27,32], and electrochemical performance as capacitors [12,26,28].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Vertically Aligned Carbon Nanotube Forests Grown on Stainless Steel Surfaces

et al. 2019

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Vertically aligned carbon nanotube (CNT) forests are a particularly interesting class of nanomaterials, because they combine multifunctional properties, such as high energy absorption, compressive strength, recoverability, and super-hydrophobicity with light weight. These characteristics make them suitable for application as coating, protective layers, and antifouling substrates for metallic pipelines and blades. Direct growth of CNT forests on metals offers the possibility of transferring the tunable CNT functionalities directly onto the desired substrates. Here, we focus on characterizing the structure and mechanical properties, as well as wettability and adhesion, of CNT forests grown on different types of stainless steel. We investigate the correlations between composition and morphology of the steel substrates with the micro-structure of the CNTs and reveal how the latter ultimately controls the mechanical and wetting properties of the CNT forest. Additionally, we study the influence of substrate morphology on the adhesion of CNTs to their substrate. We highlight that the same structure-property relationships govern the mechanical performance of CNT forests grown on steels and on Si.

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Cr as a key factor for direct synthesis of multi-walled carbon nanotubes on industrial alloys

Cited by 22 publications

References 32 publications

Robust carbon nanotube membranes directly grown on Hastelloy substrates and their potential application for membrane distillation

Robust carbon nanotube membranes directly grown on Hastelloy substrates and their potential application for membrane distillation

Hierarchically structured reactors containing nanocarbons for intensification of chemical reactions

Characterization of Vertically Aligned Carbon Nanotube Forests Grown on Stainless Steel Surfaces

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