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Khodov I, Sobornova V, Mulloyarova V, Belov K, Dyshin A, de Carvalho LB, Tolstoy P, Kiselev M. Exploring the Conformational Equilibrium of Mefenamic Acid Released from Silica Aerogels via NMR Analysis. Int J Mol Sci 2023; 24:ijms24086882. [PMID: 37108046 PMCID: PMC10138679 DOI: 10.3390/ijms24086882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/04/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
This study examines the influence of mefenamic acid on the physical and chemical properties of silica aerogels, as well as its effect on the sorption characteristics of the composite material. Solid state magic angle spinning nuclear magnetic resonance (MAS NMR) and high-pressure 13C NMR kinetic studies were conducted to identify the presence of mefenamic acid and measure the kinetic rates of CO2 sorption. Additionally, a high-pressure T1-T2 relaxation-relaxation correlation spectroscopy (RRCOSY) study was conducted to estimate the relative amount of mefenamic acid in the aerogel's pores, and a high-pressure nuclear Overhauser effect spectoscopy (NOESY) study was conducted to investigate the conformational preference of mefenamic acid released from the aerogel. The results indicate that mefenamic acid is affected by the chemical environment of the aerogel, altering the ratio of mefenamic acid conformers from 75% to 25% in its absence to 22% to 78% in the presence of aerogel.
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Affiliation(s)
- Ilya Khodov
- G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo 153045, Russia
| | - Valentina Sobornova
- G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo 153045, Russia
| | - Valeriya Mulloyarova
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 198504, Russia
| | - Konstantin Belov
- G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo 153045, Russia
| | - Alexey Dyshin
- G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo 153045, Russia
| | - Luís Batista de Carvalho
- Molecular Physical-Chemistry R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Peter Tolstoy
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 198504, Russia
| | - Michael Kiselev
- G.A. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo 153045, Russia
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Nazir G, Lee SY, Lee JH, Rehman A, Lee JK, Seok SI, Park SJ. Stabilization of Perovskite Solar Cells: Recent Developments and Future Perspectives. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2204380. [PMID: 36103603 DOI: 10.1002/adma.202204380] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2022] [Revised: 08/25/2022] [Indexed: 06/15/2023]
Abstract
Exceptional power conversion efficiency (PCE) of 25.7% in perovskite solar cells (PSCs) has been achieved, which is comparable with their traditional rivals (Si-based solar cells). However, commercialization-worthy efficiency and long-term stability remain a challenge. In this regard, there are increasing studies focusing on the interface engineering in PSC devices to overcome their poor technical readiness. Herein, the roles of electrode materials and interfaces in PSCs are discussed in terms of their PCEs and perovskite stability. All the current knowledge on the factors responsible for the rapid intrinsic and external degradation of PSCs is presented. Then, the roles of carbonaceous materials as substitutes for noble metals are focused on, along with the recent research progress in carbon-based PSCs. Furthermore, a sub-category of PSCs, that is, flexible PSCs, is considered as a type of exceptional power source due to their high power-to-weight ratios and figures of merit for next-generation wearable electronics. Last, the future perspectives and directions for research in PSCs are discussed, with an emphasis on their commercialization.
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Affiliation(s)
- Ghazanfar Nazir
- Department of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Seul-Yi Lee
- Department of Chemistry, Inha University, Incheon, 22212, Republic of Korea
- Department of Mechanical Engineering and Institute for Critical Technology and Applied Science, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Jong-Hoon Lee
- Department of Chemistry, Inha University, Incheon, 22212, Republic of Korea
| | - Adeela Rehman
- Department of Chemistry, Inha University, Incheon, 22212, Republic of Korea
| | - Jung-Kun Lee
- Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Sang Il Seok
- Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Soo-Jin Park
- Department of Chemistry, Inha University, Incheon, 22212, Republic of Korea
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Vinayakumar K, Palliyarayil A, Kumar NS, Sil S. Processing of aerogels and their applications toward CO 2 adsorption and electrochemical reduction: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:47942-47968. [PMID: 35545748 DOI: 10.1007/s11356-022-20355-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 04/15/2022] [Indexed: 06/15/2023]
Abstract
Aerogels are a unique class of nanoporous ultralight materials exhibiting wide range of textural characteristic properties and tunable porosities. Due to their remarkable features such as low density, high surface area, low refractive index, small thermal conductivity, low dielectric constant and low sound velocity, they exhibit a wide range of applications in different areas such as electronics, thermal and acoustic insulation, chemistry, biomedicine and optics. The special advantages of these materials are that they can be produced in different forms such as monoliths/granular, bead/microspheres, thin films or sheets and as blankets. Aerogels are found to be potential materials for the removal of CO2 through adsorption or electrochemical reduction. There is a plethora of research on different kinds of aerogels used for CO2 adsorption process. Research has been going on toward the development of aerogel-based electrocatalyst, which can be used for valorization of CO2 through electrochemical reduction methods. Although most of the review papers have covered applications of aerogels in CO2 capture, very few discuss the processing of aerogels, more so on their applications in CO2 valorization. In this review, we have collated literature of different forms of aerogels currently available and the steps involved in their fabrication process. In addition, we have covered applications of aerogels in CO2 capture. Furthermore, we focussed on the basic principles involved in the development of an aerogel electrocatalyst as well as recent developments of aerogels in electrochemical CO2 reduction.
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Affiliation(s)
- Karthika Vinayakumar
- Department of Environmental Protection (DEP), Defence Bioengineering and Electromedical Laboratory (DEBEL), C V Raman Nagar, 560 093, Bangalore, India
| | - Ansari Palliyarayil
- Department of Environmental Protection (DEP), Defence Bioengineering and Electromedical Laboratory (DEBEL), C V Raman Nagar, 560 093, Bangalore, India
| | - Nallaperumal Shunmuga Kumar
- Department of Environmental Protection (DEP), Defence Bioengineering and Electromedical Laboratory (DEBEL), C V Raman Nagar, 560 093, Bangalore, India
| | - Sanchita Sil
- Department of Environmental Protection (DEP), Defence Bioengineering and Electromedical Laboratory (DEBEL), C V Raman Nagar, 560 093, Bangalore, India.
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Li ZL, Zhou YL, Yan W, Luo L, Su ZZ, Fan MZ, Wang SR, Zhao WG. Cost-Effective Monolithic Hierarchical Carbon Cryogels with Nitrogen Doping and High-Performance Mechanical Properties for CO 2 Capture. ACS APPLIED MATERIALS & INTERFACES 2020; 12:21748-21760. [PMID: 32294381 DOI: 10.1021/acsami.0c04015] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Cost-effective nitrogen-doped monolithic hierarchical carbon cryogels with excellent mechanical properties and carbon dioxide (CO2) adsorption performance were prepared from phenol, melamine, and formaldehyde (PMF) by the sol-gel, freeze-drying, and then, pyrolysis processes under an inert atmosphere. The morphology, mechanical properties, pore structure, and chemical characteristics of these cryogels were investigated. The results showed that the dilution ratio played a crucial role in the preparation of nitrogen-doped PMF carbon cryogels with controlled structures. The prepared carbon cryogels were a kind of monolithic materials composed of a hierarchical pore structure and had high compression properties (0.67 and 9.4 MPa for strength and modulus), porosity (97.6%), surface area (1406 m2/g), and heteroatom nitrogen content (0.98-2.09%). CO2 adsorption capacities up to 5.75 mmol/g at 0 °C and 4.50 mmol/g at 25 °C under 1 bar were obtained, which is at a high level among N-doped carbon materials and far better than resorcinol-based carbon gels reported. These superior CO2 adsorption capacities, high isosteric adsorption heat (Qst), and good CO2/N2 adsorption selectivity were ascribed to the synergistic effect of high surface area, appropriate pore size, and also heteroatom doping.
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Affiliation(s)
- Ze-Liang Li
- College of Material Engineering, Fujian Agriculture and Forestry University, No. 63 Xiyuangong Road, Fuzhou 350002, People's Republic of China
| | - Ya-Lan Zhou
- College of Material Engineering, Fujian Agriculture and Forestry University, No. 63 Xiyuangong Road, Fuzhou 350002, People's Republic of China
| | - Wen Yan
- College of Material Engineering, Fujian Agriculture and Forestry University, No. 63 Xiyuangong Road, Fuzhou 350002, People's Republic of China
| | - Lu Luo
- College of Material Engineering, Fujian Agriculture and Forestry University, No. 63 Xiyuangong Road, Fuzhou 350002, People's Republic of China
| | - Zhi-Zhong Su
- College of Material Engineering, Fujian Agriculture and Forestry University, No. 63 Xiyuangong Road, Fuzhou 350002, People's Republic of China
- School of Resources and Chemical Technology, Sanming University, Sanming 365004, Fujian People's Republic of China
| | - Mi-Zi Fan
- College of Engineering, Design and Physical Sciences, Brunel University, Uxbridge UB8 3PH, United Kingdom
| | - Shi-Rui Wang
- College of Material Science and Engineering, Xi'an Shiyou University, 18 Dianzier Road, Xi'an 710065, People's Republic of China
| | - Wei-Gang Zhao
- College of Material Engineering, Fujian Agriculture and Forestry University, No. 63 Xiyuangong Road, Fuzhou 350002, People's Republic of China
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Liu Q, Han Y, Qian X, He P, Fei Z, Chen X, Zhang Z, Tang J, Cui M, Qiao X. CO
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Adsorption over Carbon Aerogels: the Effect of Pore and Surface Properties. ChemistrySelect 2019. [DOI: 10.1002/slct.201900137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Qing Liu
- College of Chemical EngineeringNanjing Tech University Nanjing 210009 PR China, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Yu Han
- College of Chemical EngineeringNanjing Tech University Nanjing 210009 PR China, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Xingchi Qian
- College of Chemical EngineeringNanjing Tech University Nanjing 210009 PR China, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Pingping He
- College of Chemical EngineeringNanjing Tech University Nanjing 210009 PR China, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Zhaoyang Fei
- College of Chemical EngineeringNanjing Tech University Nanjing 210009 PR China, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Xian Chen
- College of Chemical EngineeringNanjing Tech University Nanjing 210009 PR China, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Zhuxiu Zhang
- College of Chemical EngineeringNanjing Tech University Nanjing 210009 PR China, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Jihai Tang
- College of Chemical EngineeringNanjing Tech University Nanjing 210009 PR China, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing 210009 PR China
| | - Mifen Cui
- College of Chemical EngineeringNanjing Tech University Nanjing 210009 PR China, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
| | - Xu Qiao
- College of Chemical EngineeringNanjing Tech University Nanjing 210009 PR China, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 210009, PR China
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing 210009 PR China
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Abstract
Understanding the transport behavior of fluid molecules in confined spaces is central to the design of innovative processes involving porous materials and is indispensable to the correlation of process behavior with the material structure and properties typically used for structural characterizations such as pore dimension, surface texture, and tortuosity. [...]
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