Synthesis of surface-modified iron oxide nanocrystals using supercritical carbon dioxide as the reaction field

Orita, Yasuhiko; Kariya, Keito; Wijakmatee, Thossaporn; Shimoyama, Yusuke

doi:10.1039/d1ra08580h

Cited by 13 publications

(4 citation statements)

References 32 publications

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“…[ 48 ] Apart from the above‐mentioned applications, SC‐CO 2 also can be widely used in food chemistry, reaction medium, drying aid, and so forth. [ 49–53 ]…”

Section: Principles Of Sc‐co2 Technologymentioning

confidence: 99%

“…[48] Apart from the abovementioned applications, SC-CO 2 also can be widely used in food chemistry, reaction medium, drying aid, and so forth. [49][50][51][52][53] So far, there are many reviews on the application of SC-CO 2 technology in food chemistry, [50] environmental corrosion, [54] pharmacy, [55] and so forth. However, SC-CO 2 technology used in battery fields is rarely reported.…”

Section: Sc-co 2 Low Cost With High Efficiencymentioning

confidence: 99%

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Supercritical carbon dioxide technology in synthesis, modification, and recycling of battery materials

Han

Zhou

Fang

et al. 2023

Carbon Neutralization

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For pursuing the ambitious goals in the burgeoning electric vehicles, portable electronic devices, and energy storage sectors, Li-ion batteries (LIBs) are considered as one of the most promising electrochemical power sources because of their high energy density and moderate cost. Particularly, the improvement of battery materials and recycling of spent LIBs are receiving great attention since the sustainable approaches for the synthesis, modification, and recycling of battery materials are the crucial factors to the successful large-scale implementation of LIBs. In this regard, supercritical carbon dioxide (SC-CO 2 ), which possesses many merits, such as environmentally friendly, low-cost, individual chemical environment, and especially its unique physical properties, has been employed as solvent and reaction medium in the synthesis and modification of diverse functional materials. In this review, we mainly aim at compiling the applications of SC-CO 2 technology in the synthesis and modification of electrode materials as well as the recycling of LIBs. First, the unique properties and principles of SC-CO 2 technology are highlighted. Second, the latest progresses of the electrode materials design and recycling with the assistance of SC-CO 2 technique are summarized. Finally, the challenges, future directions, and perspectives on the design and development of battery materials and battery recycling by SC-CO 2 technology are proposed.

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“…[ 48 ] Apart from the above‐mentioned applications, SC‐CO 2 also can be widely used in food chemistry, reaction medium, drying aid, and so forth. [ 49–53 ]…”

Section: Principles Of Sc‐co2 Technologymentioning

confidence: 99%

Section: Sc-co 2 Low Cost With High Efficiencymentioning

confidence: 99%

Supercritical carbon dioxide technology in synthesis, modification, and recycling of battery materials

Han

Zhou

Fang

et al. 2023

Carbon Neutralization

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“… 21 Additionally, scCO 2 has high solubility of metal organic precursor and high diffusivity while the synthesis in scCO 2 is substantially solventless process because scCO 2 is easily removed only by reducing the pressure. 22,23 Furthermore, it is revealed in our recent research that scCO 2 can be used as not only synthesis medium but also washing and drying solvents for the particle production. 24 These appealing characteristics enable the simple production process without using an organic solvent and a post-treatment.…”

Section: Introductionmentioning

confidence: 99%

Low temperature synthesis of ZnO particles using a CO₂-driven mechanism under high pressure

Furuya,

Shimoyama,

Orita

2024

RSC Adv.

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“…In recent years, supercritical technology has attracted great attention from researchers due to its unique advantages ( Zeng et al, 2014 ; Li et al, 2015 ; Malaret et al, 2020 ; Liu et al, 2021 ; Yang et al, 2021 ; Orita et al, 2022 ). Compared with conventional methods, solvents exhibit many unique properties under supercritical conditions, such as low viscosity, high dispersion, strong solvent solubility, and high thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

Preparation of tobacco pyrolysis liquids in subcritical/supercritical ethanol and their application in the aroma enhancement of heated cigarettes

Zhao,

et al. 2024

Front. Chem.

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For the aroma enhancement research of heated cigarettes, it is worth exploring whether tobacco can be pyrolyzed into pyrolysis liquids containing a large number of volatile aroma components. In this study, tobacco pyrolysis liquids were prepared in subcritical/supercritical ethanol, and their applications in the aroma enhancement of heated cigarettes were investigated. The optimal conditions of supercritical liquefaction reactions were determined by optimizing the reaction time, liquid/solid mass ratio and temperature conditions. Moreover, the effect of supercritical liquefaction conditions on volatile aroma components in tobacco pyrolysis liquids was investigated by GC-MS. The results indicated that the reaction temperature had the most significant impact on the tobacco pyrolysis reaction, and higher reaction temperature promoted the pyrolysis conversion of tobacco, resulting in enhanced tobacco conversion and a high content of volatile components in the tobacco pyrolysis liquid. The optimal reaction conditions for the preparation of tobacco pyrolysis liquid were found to be a temperature of 220°C, a liquid/solid mass ratio = 15, and a 2-h reaction time. Meanwhile, the content of ester compounds and nicotine in the tobacco pyrolysis liquid increased significantly with the increase of reaction temperature. Sub/supercritical ethanol treatment significantly destroyed the surface structure of tobacco, and the degree of tobacco depolymerization increased when temperature rised. The analysis of aroma compounds in the smoke of heated cigarettes indicated that the tobacco pyrolysis liquid could significantly increase the release of aromatic substances and has a significant aroma-enhancing effect. This article proposed and prepared tobacco pyrolysis liquid in subcritical/supercritical ethanol and explored its potential application in the aroma enhancement of heated cigarettes, offering a new route for flavor enhancement technology for this type of product.

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Synthesis of surface-modified iron oxide nanocrystals using supercritical carbon dioxide as the reaction field

Abstract: We applied the supercritical CO2 technology, which is an excellent solventless process, to the synthesis of surface-modified iron oxide nanocrystals.

Cited by 13 publications

References 32 publications

Supercritical carbon dioxide technology in synthesis, modification, and recycling of battery materials

Supercritical carbon dioxide technology in synthesis, modification, and recycling of battery materials

Low temperature synthesis of ZnO particles using a CO₂-driven mechanism under high pressure

Preparation of tobacco pyrolysis liquids in subcritical/supercritical ethanol and their application in the aroma enhancement of heated cigarettes

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Synthesis of surface-modified iron oxide nanocrystals using supercritical carbon dioxide as the reaction field

Abstract: We applied the supercritical CO2 technology, which is an excellent solventless process, to the synthesis of surface-modified iron oxide nanocrystals.

Cited by 13 publications

References 32 publications

Supercritical carbon dioxide technology in synthesis, modification, and recycling of battery materials

Supercritical carbon dioxide technology in synthesis, modification, and recycling of battery materials

Low temperature synthesis of ZnO particles using a CO2-driven mechanism under high pressure

Preparation of tobacco pyrolysis liquids in subcritical/supercritical ethanol and their application in the aroma enhancement of heated cigarettes

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Product

Resources

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Low temperature synthesis of ZnO particles using a CO₂-driven mechanism under high pressure