Nawal Berrada

Institut Jean Lamour

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Co-Authors

Brigitte Vigolo

Centre National de la Recherche Scientifique

Alexandre Desforges

Université de Lorraine

Jérôme Gleize

Université de Lorraine

Jaâfar Ghanbaja

Institut Jean Lamour

Patrice Estellé

Laboratoire de génie civil et génie mécanique

Samah Hamze

Laboratoire de Mécanique et Génie Civil

C. Bellouard

Centre National de la Recherche Scientifique

Dominique Bégin

Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé

Thierry Maré

Laboratoire de génie civil et génie mécanique

Jaafar Ghanbaja

Institut Jean Lamour

Cooperative Institutions

Centre National de la Recherche Scientifique

Université de Lorraine

Institut Jean Lamour

Délégation Centre-Est

Laboratoire Réactions et Génie des Procédés

Laboratoire de Chimie Physique

Laboratoire de Chimie Physique et Microbiologie pour l'Environnement

Laboratoire de Mécanique et Génie Civil

Laboratoire de génie civil et génie mécanique

Université de Rennes

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Protecting Carbon Nanotubes from Oxidation for Selective Carbon Impurity Elimination

The Journal of Physical Chemistry C (2019)

Nawal Berrada Alexandre Desforges C. Bellouard Emmanuel Flahaut Jérôme Gleize

Purity of carbon nanotubes (CNTs) is essential to avoid a dramatic decrease in their performances. In addition to metallic impurities, carbonaceous impurities have been shown to be responsible for pronounced effects. However, they are highly difficult to be selectively removed from CNT samples because of the similar chemical reactivity of these two kinds of carbon species. The existing purification methods often lead to high CNT consumption (>90 wt %). The proposed method consists of a one-pot gas-phase treatment combining chlorine and oxygen. The CNT powder maintained in a chlorine stream is submitted to oxygen at moderate temperature [350 and 500 °C for single-walled CNTs (SWCNTs) and double-walled CNTs (DWCNTs), respectively], and the thermal treatment is then pursued at 900–1000 °C under chlorine alone. Our work reveals that this approach is able to significantly improve the selectivity of elimination of carbonaceous impurities. Thanks to the proposed purification treatment, only 19 and 11 wt % of carbon species (mainly carbon impurities) are lost for DWCNTs and SWCNTs, respectively. The mechanism proposed involves a protective effect by grafting of chlorine favored to the CNT walls. Because our simple one-pot purification method is also versatile and scalable, it opens new perspectives for CNT applications in high-added value fields.

Carbon fibers

10.1021/acs.jpcc.8b12554

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Citations (16)

Dynamic Viscosity of Purified Multi-Walled Carbon Nanotubes Water and Water-Propylene Glycol-Based Nanofluids

Heat Transfer Engineering (2020)

Samah Hamze Nawal Berrada Alexandre Desforges Brigitte Vigolo Jérôme Gleize

We report in this study the experimental investigation of the dynamic viscosity of purified multi-walled carbon nanotubes (MWCNT) water and water-propylene glycol-based nanofluids in the temperature range 10–80 °C. Four weight concentrations of MWCNTs are considered, between 0.005 and 0.1 wt.%. Triton X-100, a common nonionic surfactant, is used to disperse the nanotubes and stabilize the nanofluids as evidenced by optical characterization. Purified and non-damaged MWCNTs are used for nanofluid preparation by the two-step method. MWCNT characterization is deeply investigated from a set of complementary techniques such as thermogravimetric analysis, transmission electron microscopy, and Raman spectroscopy. The studied nanofluids behave as Newtonian fluids for low nanotube content while a shear-thinning behavior is noticed for higher concentration. Finally, the viscosity enhancement of nanofluids with MWCNT loading is compared to the modified Maron–Pierce model considering the presence of aggregates and their size obtained from optical observations.

Thermogravimetric analysis

Shear thinning

Polyvinyl Alcohol

10.1080/01457632.2020.1818382

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Citations (8)

Chlorine for a high selective elimination of metallic and carbonaceous impurities from carbon nanotubes

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

Nawal Berrada

Carbon fibers

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From 2D Graphene Nanosheets to 3D Graphene‐based Macrostructures

Chemistry - An Asian Journal (2020)

Rabita Mohd Firdaus Nawal Berrada Alexandre Desforges Abdul Rahman Mohamed Brigitte Vigolo

Abstract The combination of exceptional functionalities offered by 3D graphene‐based macrostructures (GBMs) has attracted tremendous interest. 2D graphene nanosheets have a high chemical stability, high surface area and customizable porosity, which was extensively researched for a variety of applications including CO 2 adsorption, water treatment, batteries, sensors, catalysis, etc. Recently, 3D GBMs have been successfully achieved through few approaches, including direct and non‐direct self‐assembly methods. In this review, the possible routes used to prepare both 2D graphene and interconnected 3D GBMs are described and analyzed regarding the involved chemistry of each 2D/3D graphene system. Improvement of the accessible surface of 3D GBMs where the interface exchanges are occurring is of great importance. A better control of the chemical mechanisms involved in the self‐assembly mechanism itself at the nanometer scale is certainly the key for a future research breakthrough regarding 3D GBMs.

Interface (matter)

Nanometre

10.1002/asia.202000747

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Citations (37)

Multiwalled Carbon Nanotube Purification Probed by Electrochemistry: Low‐Temperature Chlorine Gas Treatment Meets High‐Temperature Annealing

ChemNanoMat (2022)

Nawal Berrada Wassim El Housseini Alexandre Desforges Jérôme Gleize Jaâfar Ghanbaja

Abstract The metal‐based residues in carbon nanotube samples can have an enormous impact to their properties which hinders their transfer to practical applications. Development of high‐performance purification methods and high sensitive approaches to detect and quantify the remaining impurities within the nanotube samples are still an active research field. Here, commercial multiwalled carbon nanotubes have been purified thanks to a non‐standard one‐step gas phase treatment using chlorine. Its facile reaction with the metal based impurities located inside and outside the carbon nanotubes allows to efficiently remove them at 1000 °C, with a sample yield of 79%. Raman spectroscopy and X‐ray photoelectron spectroscopy show that the carbon nanotube quality is preserved after purification. The quantity of magnetic residues is accurately evaluated by magnetic measurements, their outcome content is below 500 ppm (weight %). Finally, the redox behavior probed with hydrogen peroxide reduction is competitive with that obtained with a commercial sample thermally purified at 2400 °C. These two techniques were combined for the first time for high sensitivity characterization of ultra‐pure multiwalled carbon nanotubes. The used chlorine‐based treatment fulfills the requirements of an alternative tool to develop low energy processes for large scale industrial production of purified carbon nanotubes.

Carbon fibers

10.1002/cnma.202200275

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Citations (2)

Few-Layer Graphene-Based Nanofluids with Enhanced Thermal Conductivity

Nanomaterials (2020)

Samah Hamze Nawal Berrada David Cabaleiro Alexandre Desforges Jaafar Ghanbaja

High-quality graphene is an especially promising carbon nanomaterial for developing nanofluids for enhancing heat transfer in fluid circulation systems. We report a complete study on few layer graphene (FLG) based nanofluids, including FLG synthesis, FLG-based nanofluid preparation, and their thermal conductivity. The FLG sample is synthesized by an original mechanical exfoliation method. The morphological and structural characterization are investigated by both scanning and transmission electron microscopy and Raman spectroscopy. The chosen two-step method involves the use of thee nonionic surfactants (Triton X-100, Pluronic® P123, and Gum Arabic), a commercial mixture of water and propylene glycol and a mass content in FLG from 0.05 to 0.5%. The thermal conductivity measurements of the three FLG-based nanofluid series are carried out in the temperature range 283.15-323.15 K by the transient hot-wire method. From a modeling analysis of the nanofluid thermal conductivity behavior, it is finally shown that synergetic effects of FLG nanosheet size and thermal resistance at the FLG interface both have significant impact on the evidenced thermal conductivity enhancement.

Nanosheet

Exfoliation joint

10.3390/nano10071258

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Citations (36)

Non-covalent and covalent immobilization of Candida antarctica lipase B on chemically modified multiwalled carbon nanotubes for a green acylation process in supercritical CO2

Catalysis Today (2019)

Mohamed Chafik Bourkaib Yann Guiavarc’h Isabelle Chevalot Stéphane Delaunay Jérôme Gleize

Candida antarctica

Biocatalysis

Surface Modification

Potassium permanganate

10.1016/j.cattod.2019.08.046

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Citations (48)

Graphene-based nanofluids: structural quality of graphene vs. dispersion quality

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

Nawal Berrada Alexandre Desforges Jaâfar Ghanbaja Jérôme Gleize Dominique Bégin

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Front Cover: From 2D Graphene Nanosheets to 3D Graphene‐based Macrostructures (Chem. Asian J. 19/2020)

Chemistry - An Asian Journal (2020)

Rabita Mohd Firdaus Nawal Berrada Alexandre Desforges Abdul Rahman Mohamed Brigitte Vigolo

The assembly of nanomaterials such as graphene into 3D hierarchized macrostructures is definitely of great interest for a wide range of environmental applications. The main challenge of the present research remains to transfer the properties of a nanomaterial to a macroscopic material in a controlled manner so that the designed materials can have their own properties multiplied. More information can be found in the Minireview by Brigitte Vigolo, Abdul Rahman Mohamed et al.

Front cover

Nanomaterials

10.1002/asia.202000950

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Multiwalled Carbon Nanotube Purification Probed by Electrochemistry: Low Temperature Chlorine Gas Treatment Meets High Temperature Annealing

SSRN Electronic Journal (2021)

Nawal Berrada Wassim El Housseini Alexandre Desforges Jérôme Gleize Jaâfar Ghanbaja

Commercial multiwall carbon nanotubes have been purified thanks to a one pot gas phase treatment using chlorine. Its facile reaction with the metal based impurities located inside and outside the carbon nanotubes walls allows to remove them at 1000°C, with a sample yield of 79 %. Raman spectroscopy and X-ray photoelectron spectroscopy show that the carbon nanotubes quality is improved compared to the raw sample. The quantity of magnetic residue is accurately evaluated thanks to magnetic measurements, their content is below 500 ppm (weight %). Finally, the redox behavior probed with hydrogen peroxide reduction is competitive with those obtained with a commercial, thermally purified sample at 2400°C. The chlorine - based treatment then fulfills all the requirements of an alternative tool to develop lower energy processes for large scale industrial production of purified carbon nanotubes.

Carbon fibers

10.2139/ssrn.3970802

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Citations (0)