UV-assisted functionalization of carbon nanotube for synthesis of efficient desulfurization catalysts (NH2/COOH)-MWNT/MoO3

Dini, Zahra; Afsharpour, Maryam; Tabar‐Heydar, Kourosh

doi:10.1016/j.diamond.2018.11.026

Cited by 23 publications

(23 citation statements)

References 47 publications

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“…However, unlike zein, the absorption of AM-zein in the range 200-400 nm always increased with the increase in the illumination time, imparting AM-zein excellent UV shielding performance in the later stage. 45 In some reports, 46,47 the chemical reactivity of some functional groups increases under UV radiation, which makes it easier for them to react with other functional groups to form new chemical bonds. AM-zein contains a large number of highly reactive amino and hydroxyl groups, so we speculate that the formation of new chemical bonds may be responsible for the increase of UV absorption intensity at 200-230 nm.…”

Section: Photodegradation Of Avmmentioning

confidence: 99%

A stable polyamine‐modified zein‐based nanoformulation with high foliar affinity and lowered toxicity for sustained avermectin release

Chen¹,

Lin²,

Zhou³

et al. 2021

Pest Management Science

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BACKGROUND: A large amount of pesticides that are not deposited on desired locations due to drift and rolling, endangering the ecological environment and human health. Therefore, it is urgent to develop environmentally friendly and foliar affinity formulations. The design and construction of pesticide nano-delivery system is considered to be an effective way to solve this problem.RESULTS: In this research, polyamine-modified zein (AM-zein) was synthesized by incorporating ethylenediamine-terminated polyethyleneimine into zein to improve its stability as a nanocarrier, enhance electrostatic force between the carrier and pesticides and plant foliage. Avermectin (AVM)-loaded nanoparticles, containing a high positive charge, were prepared by the anti-solvent method using AM-zein as carrier. The nanoparticles can be stored for 30 days without any significant change in the particle size and stably dispersed at pH 5-9. Compared to the commercial emulsifiable concentrate (EC), nanoparticles dispersions exhibited better leaf affinity, and the retention of dispersion increased from 7.82 to 13.86 mg/cm 2 . Interestingly, we have discovered for the first time that the ultraviolet (UV) barrier effect of zein increases while prolonging the UV exposure time; 30.47% of the encapsulated AVM remained intact after exposure to UV for 60 min, compared to only 17.13% for the EC. Insecticidal activity of AVM nanoparticles did not improve compared to EC, but they demonstrated significantly lower toxicity against zebrafish.CONCLUSION: This research opens up a new idea for improving the stability of zein nanoparticles, providing a novel path to deliver pesticides efficiently and eco-friendly.

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Section: Photodegradation Of Avmmentioning

confidence: 99%

A stable polyamine‐modified zein‐based nanoformulation with high foliar affinity and lowered toxicity for sustained avermectin release

Chen¹,

Lin²,

Zhou³

et al. 2021

Pest Management Science

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“…Functional groups on the carbon material can impact the coordination of active species (metallic centers) [109][110][111]. Dini, Afsharpour, and Tabar-Heydar (2019) argued that the oxidation of DBT undergoes an electrophilic attack of the peroxo group (LUMO) on the catalyst surface to the sulfur compound (HOMO) [110]. Thus, efficient oxidation needs to overcome the LUMO-HOMO barrier.…”

Section: L-l Biphasic Systemsmentioning

confidence: 99%

Carbon-Based Materials for Oxidative Desulfurization and Denitrogenation of Fuels: A Review

et al. 2021

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Sulfur (S) and nitrogen (N) are elements naturally found in petroleum-based fuels. S- and N-based compounds in liquid fuels are associated with a series of health and environmental issues. Thus, legislation has become stricter worldwide regarding their content and related emissions. Traditional treatment systems (namely hydrodesulfurization and hydrodenitrogenation) fail to achieve the desired levels of S and N contents in fuels without compromising combustion parameters. Thus, oxidative treatments (oxidative desulfurization–ODS, and oxidative denitrogenation-ODN) are emerging as alternatives to producing ultra-low-sulfur and nitrogen fuels. This paper presents a thorough review of ODS and ODN processes applying carbon-based materials, either in hybrid forms or as catalysts on their own. Focus is brought to the role of the carbonaceous structure in oxidative treatments. Furthermore, a special section related to the use of amphiphilic carbon-based catalysts, which have some advantages related to a closer interaction with the oily and aqueous phases, is discussed.

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“…Novel CNT hybrids with good catalytic properties can be obtained by a facile and fast method for immobilization of WO 3 /MoO 3 on the surface and into the cavity of CNTs. The best oxidative desulfurization results (99.2%) have been obtained on the 2WO 3 /MoO 3 -CNT with the 16.5 : 8.5 wt% of WO 3 : MoO 3 in Afsharpour's group [29]. However, both of these composites with high desulfurization performance need a relatively expensive catalyst, high temperature or longer reaction time.…”

Section: Optimization Of the Desulfurization Processmentioning

confidence: 99%

Deep desulfurization performance of thiophene with deep eutectic solvents loaded carbon nanotube composites

et al. 2021

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One source of air pollution is the combustion of sulfur compounds in fuel oil. Reducing sulfur content in fuel oil has become a hot issue demanding timely solutions. Using ionic liquids and deep eutectic solvents (DESs) to remove sulfides in fuel oil has achieved good results presently. However, since DESs are liquid and their transportation and separation are inconvenient, a new way is proposed that the DESs are loaded on the carbon nanotubes (CNTs) with large specific surface area and good chemical stability. A series of composites materials (DESs/CNTs) were prepared. Finally, they are applied to the removal of sulfides in fuel oil. This loading method, which imparts introduced unique physico-chemical properties of the DESs to the carrier materials, preserves both advantages while overcoming some of the problems with DESs. The interaction between DESs and CNTs is mutual promotion. Therefore, this study has important theoretical significance and industrial application value. Under optimal conditions, when the reagent ChCl/p-TsOH (1 : 2) was loaded on multi-walled CNTs (OD = 30–60 nm) to prepare the composite material (ChCl/p-TsOH)/CNTs, the single desulfurization rate of the composite material was 95.8%. Finally, the catalytic/oxidation mechanism was studied systematically and this work would provide a green route for the desulfurization of fuels.

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UV-assisted functionalization of carbon nanotube for synthesis of efficient desulfurization catalysts (NH2/COOH)-MWNT/MoO3

Cited by 23 publications

References 47 publications

A stable polyamine‐modified zein‐based nanoformulation with high foliar affinity and lowered toxicity for sustained avermectin release

A stable polyamine‐modified zein‐based nanoformulation with high foliar affinity and lowered toxicity for sustained avermectin release

Carbon-Based Materials for Oxidative Desulfurization and Denitrogenation of Fuels: A Review

Deep desulfurization performance of thiophene with deep eutectic solvents loaded carbon nanotube composites

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