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CO2-Responsive Materials
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CO2-Responsive Materials

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (30 November 2023) | Viewed by 4372

Special Issue Editors

Dr. Zhehui Jin

E-Mail Website
Guest Editor
School of Mining and Petroleum Engineering, Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
Interests: oil/gas; energy storage; chemical additives; “smart” materials; environment; simulation
Dr. Yi Lu

E-Mail Website
Guest Editor
Chemical and Biological Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
Interests: colloids and interfaces; foams and emulsions; living soft matter; bio-based materials; stimuli-responsive materials; blue energy harvesting; machine learning
Dr. Rui Li

E-Mail Website
Guest Editor
Petroleum Engineering School, Southwest Petroleum University China, Chengdu 610500, China
Interests: colloids and interfaces; oilfield chemistry; “smart” materials; unconventional oil and gas recovery; in-situ hydrogen production

Special Issue Information

Dear Colleagues,

CO2-responsive materials have been an emerging field of study for the development of “smart” materials in the past decade. CO2-responsive materials change their physiochemical properties upon the introduction or removal of CO2 gas, such that they could exhibit multi-functionalities with fine controls. Therefore, CO2-responsive materials have drawn numerous attentions from the oil & gas industry, water treatment, food science, pharmaceutical and biological applications. Notably, the switching process triggered by CO2 gas is facile, cheap, reversible, versatile, and non-accumulative, compared to common triggers (e.g., temperature, pH, ionic strength), which endows CO2-responsive materials with promising potentials in large-scale scenarios. The utilization of CO2 gas by CO2-responsive materials, especially direct capture from exhaust gases, also brings opportunities for carbon neutrality.

Dr. Zhehui Jin
Dr. Yi Lu
Dr. Rui Li
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • CO2-responsive materials
  • smart materials
  • CO2 capture
  • CO2 utilization
  • carbon neutrality

Published Papers (3 papers)

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Research

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16 pages, 5035 KiB  
Article
Incorporation of Amino Acid-Functionalized Ionic Liquids into Highly Porous MOF-177 to Improve the Post-Combustion CO2 Capture Capacity
by Firuz A. Philip and Amr Henni
Molecules 2023, 28(20), 7185; https://doi.org/10.3390/molecules28207185 - 20 Oct 2023
Cited by 1 | Viewed by 1304
Abstract
This study presents the encapsulation of two amino acid-based ionic liquids (AAILs), 1-ethyl-3-methylimidazolium glycine [Emim][Gly] and 1-ethyl-3-methylimidazolium alanine [Emim][Ala], in a highly porous metal–organic framework (MOF-177) to generate state-of-the-art composites for post-combustion CO2 capture. Thermogravimetric analysis (TGA) demonstrated a successful encapsulation of [...] Read more.
This study presents the encapsulation of two amino acid-based ionic liquids (AAILs), 1-ethyl-3-methylimidazolium glycine [Emim][Gly] and 1-ethyl-3-methylimidazolium alanine [Emim][Ala], in a highly porous metal–organic framework (MOF-177) to generate state-of-the-art composites for post-combustion CO2 capture. Thermogravimetric analysis (TGA) demonstrated a successful encapsulation of the AAILs, with a dramatic reduction in the composites’ surface areas and pore volumes. Both [Emim][Gly]@MOF-177 and [Emim][Ala]@MOF-177 had close to three times the CO2 uptake of MOF-177 at 20 wt.% loading, 0.2 bar, and 303 K. Additionally, 20-[Emim][Gly]@MOF-177 and 20-[Emim] [Ala]@MOF-177 enhanced their CO2/N2 selectivity from 5 (pristine MOF-177) to 13 and 11, respectively. Full article
(This article belongs to the Special Issue CO2-Responsive Materials)
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16 pages, 6663 KiB  
Article
Corrosion Inhibition in CO2-Saturated Brine by Nd3+ Ions
by Jorge Canto, Roberto Ademar Rodríguez-Díaz, Lorenzo Martinez Martinez-de-la-Escalera, Adrian Neri and Jesus Porcayo-Calderon
Molecules 2023, 28(18), 6593; https://doi.org/10.3390/molecules28186593 - 13 Sep 2023
Cited by 1 | Viewed by 857
Abstract
This study reports the use of an inorganic corrosion inhibitor to mitigate dissolved CO2-induced corrosion. Using electrochemical techniques (polarization curves, open circuit potential, polarization resistance, and electrochemical impedance), the effect of adding Nd3+ ions on the corrosion resistance of X52 [...] Read more.
This study reports the use of an inorganic corrosion inhibitor to mitigate dissolved CO2-induced corrosion. Using electrochemical techniques (polarization curves, open circuit potential, polarization resistance, and electrochemical impedance), the effect of adding Nd3+ ions on the corrosion resistance of X52 steel immersed in CO2-saturated brine at 20 °C and 60 °C was evaluated. The polarization curves showed that the Icorr values tend to decrease with increasing Nd3+ ion concentration, up to the optimal inhibition concentration, and that the corrosion potential increases at nobler values. Open circuit potential measurements showed a large increase in potential values immediately after the addition of the Nd3+ ions. Similarly, polarization resistance measurements showed similar trends. It was observed that regardless of temperature, Nd3+ ions can reduce the corrosion rate by more than 97% at doses as low as 0.001 M. Electrochemical impedance measurements confirmed the formation of a protective layer on the steel surface, which caused an increase in the magnitude of the impedance module and phase angle, which indicates an increase in the resistance to charge transfer and capacitive properties of the metallic surface. The characterization of the metallic surface showed that the protective layer was formed by Nd carbonates, whose formation was due to a CO2 capture process. Full article
(This article belongs to the Special Issue CO2-Responsive Materials)
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Review

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25 pages, 728 KiB  
Review
Ionic Liquids Hybridization for Carbon Dioxide Capture: A Review
by Asyraf Hanim Ab Rahim, Normawati M. Yunus and Mohamad Azmi Bustam
Molecules 2023, 28(20), 7091; https://doi.org/10.3390/molecules28207091 - 14 Oct 2023
Cited by 5 | Viewed by 1454
Abstract
CO2 absorption has been driven by the need for efficient and environmentally sustainable CO2 capture technologies. The development in the synthesis of ionic liquids (ILs) has attracted immense attention due to the possibility of obtaining compounds with designated properties. This allows [...] Read more.
CO2 absorption has been driven by the need for efficient and environmentally sustainable CO2 capture technologies. The development in the synthesis of ionic liquids (ILs) has attracted immense attention due to the possibility of obtaining compounds with designated properties. This allows ILs to be used in various applications including, but not limited to, biomass pretreatment, catalysis, additive in lubricants and dye-sensitive solar cell (DSSC). The utilization of ILs to capture carbon dioxide (CO2) is one of the most well-known processes in an effort to improve the quality of natural gas and to reduce the green gases emission. One of the key advantages of ILs relies on their low vapor pressure and high thermal stability properties. Unlike any other traditional solvents, ILs exhibit high solubility and selectivity towards CO2. Frequently studied ILs for CO2 absorption include imidazolium-based ILs such as [HMIM][Tf2N] and [BMIM][OAc], as well as ILs containing amine groups such as [Cho][Gly] and [C1ImPA][Gly]. Though ILs are being considered as alternative solvents for CO2 capture, their full potential is limited by their main drawback, namely, high viscosity. Therefore, the hybridization of ILs has been introduced as a means of optimizing the performance of ILs, given their promising potential in capturing CO2. The resulting hybrid materials are expected to exhibit various ranges of chemical and physical characteristics. This review presents the works on the hybridization of ILs with numerous materials including activated carbon (AC), cellulose, metal-organic framework (MOF) and commercial amines. The primary focus of this review is to present the latest innovative solutions aimed at tackling the challenges associated with IL viscosity and to explore the influences of ILs hybridization toward CO2 capture. In addition, the development and performance of ILs for CO2 capture were explored and discussed. Lastly, the challenges in ILs hybridization were also being addressed. Full article
(This article belongs to the Special Issue CO2-Responsive Materials)
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