Peierls-type metal-insulator transition in carbon nanostructures

Zhang, Bing; Zhang, Ting; Pan, Jie; Chow, Tsz Pong; Aboalsaud, Ammar M.; Lai, Zhiping; Sheng, Ping

doi:10.1016/j.carbon.2020.10.037

Cited by 2 publications

(1 citation statement)

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“…It can be seen from Figure 6 that the optimal excitation wavelength of the three spherical carbon nanostructures was 420 nm; when the excitation wavelength increased from 360 nm to 420 nm, the emission wavelengths of samples a and c were similarly concentrated between 430 nm and 700 nm, and the emission wavelength of sample b was concentrated between 330 nm and 600 nm. At the same time, with the increase in the excitation wavelength, the three spherical carbon nanostructures all had different degrees of red-shift, indicating that the fluorescence of the three spherical carbon nanostructures was closely related to the excitation wavelength, which may be the result of the surface defects of the spherical carbon nanostructures [ 14 , 15 , 16 ]. This indicates that the polar functional groups on the surface of the spherical carbon nanostructures reduced the energy level difference of the π−π* transition.…”

Section: Resultsmentioning

confidence: 99%

Nanoarchitectonics of Carbon Nanostructures: Sodium Dodecyl Sulfonate @ Sodium Chloride System

Chen

2022

Nanomaterials

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Carbon nanostructures (carbon nanotubes, nano carbon spheres, layered carbon nanostructures) were prepared from a sodium dodecyl sulfonate @ sodium chloride system. Sodium dodecyl sulfonate was used as a carbon source. A sodium chloride crystal in the carbonization procedure was used to separate ordered aggregates of sodium dodecyl sulfonate. The results show that different carbon nanostructures were prepared at low concentrations (1CMC~5CMC) by controlling the concentration of sodium dodecyl sulfonate, such as nano carbon spheres and carbon nanotubes, and that layered carbon nanostructures were formed at high concentrations (10CMC). The prepared carbon nanostructures were characterized by transmission electron microscopy, fluorescence spectrometry and Raman spectrometry. The results of this experiment show that the surfactant @ salt system is a potential method for the preparation of carbon nanostructures.

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Section: Resultsmentioning

confidence: 99%

Nanoarchitectonics of Carbon Nanostructures: Sodium Dodecyl Sulfonate @ Sodium Chloride System

Chen

2022

Nanomaterials

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Aromatics Alkylated with Olefins Utilizing Zeolites as Heterogeneous Catalysts: A Review

Al-Sultani,

Al-Shathr,

Al-Zaidi

2024

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The alkylation reaction of aromatic compounds gains considerable attention because of its wide application in bulk and fine chemical production. Aromatics alkylated with olefins is a well-known process, particularly for linear alkylbenzene, phenyloctanes, and heptyltoluene production. As octane boosters and precursors for various petrochemical and bulk chemical products, a wide range of alkylated compounds are in high demand. Numerous unique structures have been proposed in addition to the usual zeolites (Y and beta) utilized in alkylation procedures. The inevitable deactivation of industrial catalysts over time on stream, which is followed by a decrease in catalytic activity and product selectivity, is one of their disadvantages. Therefore, careful consideration of catalyst deactivation regarding the setup and functioning of the process of catalysis is necessary. Although a lot of work has been carried out to date to prevent coke and increase catalyst lifespan, deactivation of the catalyst is still unavoidable. Coke deposition can lead to catalyst deactivation in industrial catalytic processes by obstructing pores and/or covering acid sites. It is very desirable to regenerate inactive catalysts in order to remove the coke and restore catalytic activity at the same time. Depending on the kind of catalyst, the deactivation processes, and the regeneration settings, each regeneration approach has pros and cons. In this comprehensive study, the focus was on discussing the reaction mechanism of 1-octene isomerization and toluene alkylation as an example of isomerization and alkylation reactions that occur simultaneously, shedding light in detail on the catalysts used for this type of complex reaction, taking into account the challenges facing the catalyst deactivation and reactivation procedures.

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Peierls-type metal-insulator transition in carbon nanostructures

Cited by 2 publications

References 29 publications

Nanoarchitectonics of Carbon Nanostructures: Sodium Dodecyl Sulfonate @ Sodium Chloride System

Nanoarchitectonics of Carbon Nanostructures: Sodium Dodecyl Sulfonate @ Sodium Chloride System

Aromatics Alkylated with Olefins Utilizing Zeolites as Heterogeneous Catalysts: A Review

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