Molybdenum anchoring effect in Fe–Mo/MgO catalyst for multiwalled carbon nanotube synthesis

Panić, Sanja; Bajac, Branimir; Rakić, Slavko; Kukovecz, Ákos; Srdić, Vladimir V.; Bošković, Goran

doi:10.1007/s11144-017-1291-y

Cited by 13 publications

(6 citation statements)

References 43 publications

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“…The TEM images of pristine MWCNTs ( Figure 1 a) testified to a very high aspect ratio and the highly warped and interwoven tube structures that formed a dense network, which is typical for such a material [ 49 ]. Many of the nanotubes (90%) had external diameters, which mostly ranged within 5–30 nm.…”

Section: Resultsmentioning

confidence: 99%

Comparative Study on the Removal Efficiency of Clomazone and Amitriptyline via Adsorption and Photocatalysis in Aqueous Media: Kinetic Models and Toxicity Assessment

Tot,

Despotović,

Panić

et al. 2024

Materials

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This study aimed to compare the effectiveness of adsorption and photocatalysis techniques at removing the herbicide clomazone (CLO) and the antidepressant known as amitriptyline (AMI) from water. This study employed kinetic models to analyze the removal processes and assess the potential toxicity of the treated water. The structure and morphology of the prepared multi-walled carbon nanotubes were characterized as adsorbents by transmission electron microscopy, X-ray diffraction, Fourier transform infrared techniques, and Raman spectroscopy. The adsorption kinetics of CLO and AMI were studied on the pristine and functionalized multi-walled carbon nanotubes. Kinetic studies were performed by modeling the obtained experimental data using three kinetic models: pseudo-first-order, pseudo-second-order, and Elovich kinetic models. On the other hand, the efficiency of CLO and AMI photodegradation was examined as a function of the type of irradiation (UV and simulated solar irradiation) and type of TiO2 photocatalyst (Aeroxide and Kronos). Under the experimental conditions employed, the reaction followed pseudo-first-order kinetics. Additionally, in order to assess the toxicity of water containing CLO, AMI, and their intermediates, toxicity assessments were conducted using human fetal lung fibroblast cells. The results obtained indicate the effectiveness of both methods and provide valuable insights into their removal mechanisms, contributing to the advancement of sustainable water treatment strategies.

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Section: Resultsmentioning

confidence: 99%

Comparative Study on the Removal Efficiency of Clomazone and Amitriptyline via Adsorption and Photocatalysis in Aqueous Media: Kinetic Models and Toxicity Assessment

Tot,

Despotović,

Panić

et al. 2024

Materials

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“…The key aspect of this work was the monolayer assembly of premade Fe 3 O 4 catalyst and Al 2 O 3 catalyst support nanoparticles for the synthesis of VA-CNTs. It has been reported that the synthesis of CNTs with a specific chirality mostly depends on the interactions between the metal catalyst, catalyst support, and hydrocarbon [36][37][38]. Figure 1A shows a schematic diagram of the process for assembling the catalyst support and catalyst films for VA-CNT growth.…”

Section: Resultsmentioning

confidence: 99%

Premade Nanoparticle Films for the Synthesis of Vertically Aligned Carbon Nanotubes

Hoque

Ullah

Guiton

et al. 2021

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Carbon nanotubes (CNTs) offer unique properties that have the potential to address multiple issues in industry and material sciences. Although many synthesis methods have been developed, it remains difficult to control CNT characteristics. Here, with the goal of achieving such control, we report a bottom-up process for CNT synthesis in which monolayers of premade aluminum oxide (Al2O3) and iron oxide (Fe3O4) nanoparticles were anchored on a flat silicon oxide (SiO2) substrate. The nanoparticle dispersion and monolayer assembly of the oleic-acid-stabilized Al2O3 nanoparticles were achieved using 11-phosphonoundecanoic acid as a bifunctional linker, with the phosphonate group binding to the SiO2 substrate and the terminal carboxylate group binding to the nanoparticles. Subsequently, an Fe3O4 monolayer was formed over the Al2O3 layer using the same approach. The assembled Al2O3 and Fe3O4 nanoparticle monolayers acted as a catalyst support and catalyst, respectively, for the growth of vertically aligned CNTs. The CNTs were successfully synthesized using a conventional atmospheric pressure-chemical vapor deposition method with acetylene as the carbon precursor. Thus, these nanoparticle films provide a facile and inexpensive approach for producing homogenous CNTs.

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“…Since we focus on the catalytic function of the graphitization of nanoparticles, minor differences in the size and shape of nanoparticles can be ignored. The exclusion of the size and shape effects was justified by [44][45][46][47] those reported that multi-walled carbon nanotube (MWCNT) could be synthesized using nanoparticles with any shape when the size is smaller thañ 100 nm. Therefore, the catalytic activities of Fe 1−x Mn x O particles were examined merely by tuning the composition ratio of the nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Carbon Nanotubes by Plasma-Enhanced Chemical Vapor Deposition Using Fe1−xMnxO Nanoparticles as Catalysts: How Does the Catalytic Activity of Graphitization Affect the Yields and Morphology?

Yanase

Miura

Shiratori

et al. 2019

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The choice of a catalyst for carbon nanotube (CNT) growth is critical to controlling the morphology and chirality of the final product. Plasma-enhanced chemical vapor deposition (PECVD) can alleviate the requirements of the catalyst, i.e., they must be active for both the decomposition of the source gas and graphitization in the conventional thermal CVD. However, it is still not well understood how the catalytic activity of the graphitization affects the yield and quality of CNTs. In this paper, we systematically investigated the influence of the catalytic activity of graphitization by tuning the composition of Fe 1−x Mn x O (x = 0-1) nanoparticles as catalysts. As the Mn component increased, the number of CNTs decreased because Mn has no catalytic function of the graphitization. The quality of CNTs also affected by the inclusion of the Mn component. Our study may provide useful information to develop a new catalyst for CNT growth in PECVD.

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Molybdenum anchoring effect in Fe–Mo/MgO catalyst for multiwalled carbon nanotube synthesis

Cited by 13 publications

References 43 publications

Comparative Study on the Removal Efficiency of Clomazone and Amitriptyline via Adsorption and Photocatalysis in Aqueous Media: Kinetic Models and Toxicity Assessment

Comparative Study on the Removal Efficiency of Clomazone and Amitriptyline via Adsorption and Photocatalysis in Aqueous Media: Kinetic Models and Toxicity Assessment

Premade Nanoparticle Films for the Synthesis of Vertically Aligned Carbon Nanotubes

Synthesis of Carbon Nanotubes by Plasma-Enhanced Chemical Vapor Deposition Using Fe1−xMnxO Nanoparticles as Catalysts: How Does the Catalytic Activity of Graphitization Affect the Yields and Morphology?

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