Article
Chemistry, Multidisciplinary
Sonia La Cognata, Riccardo Mobili, Chiara Milanese, Massimo Boiocchi, Mattia Gaboardi, Donatella Armentano, Johannes C. Jansen, Marcello Monteleone, Ariana R. Antonangelo, Mariolino Carta, Valeria Amendola
Summary: Two novel imide/imine-based organic cages were prepared and studied as materials for selective separation of CO2 from N-2 and CH4. The cages showed selectivity for CO2 over N-2 and CH4 in gas adsorption and membrane filling, leading to improved gas transport properties and CO2 selectivity in mixed-matrix membranes.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Wei Wu, Chunyuan Feng, Mantao Chen, Qin Tan, Yue Deng, Chao Zeng, Lixiang Zhong, Chunhui Dai
Summary: In this study, two new benzimidazole-linked conjugated microporous polymers were synthesized and one of them showed excellent selectivity and high productivity in the photocatalytic reduction of low-content CO2.
Article
Chemistry, Applied
Yucong Zu, Jiawen Li, Xilin Li, Tongyi Zhao, Hao Ren, Fuxing Sun
Summary: Porous organic frameworks composed of organic building blocks have attracted attention for their tunable porosity, lightweight, and hydrolytic stability. Three new porous aromatic frameworks based on the [4 + 3] design strategy have been synthesized. These frameworks have high surface areas and exhibit excellent CO2 adsorption performance, making them promising candidates for CO2 capture.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Gernot Rother, Uma Tumuluri, Kuan Huang, William T. Heller, Sheng Dai, Jan-Michael Carrillo, Bobby G. Sumpter
Summary: Efficient carbon capture can be achieved using hybrid adsorbents comprising nanoporous substrates coated with imine polymers. The interactions between the CO2-adsorbing polymers and the substrates impact their capture capacity. Strong densification of imine polymers in mesoporous carbon and the formation of plugs at high loadings influence the accessible porosity and CO2 adsorption capacity. PEI in carbon shows highest capture capacity at low temperatures, making it suitable for temperature swing adsorption applications.
Article
Chemistry, Physical
Xiao-Yu Dong, Fang-Qin Yan, Qian-You Wang, Peng-Fei Feng, Ru-Yi Zou, Shan Wang, Shuang-Quan Zang
Summary: In this study, a novel Ni,Co-based bimetallic covalent organic framework (NiPc-CoPor-imi-COF) was synthesized by connecting metallic porphyrin and phthalocyanine moieties through a unique benzimidazole linkage. The NiPc-CoPor-imi-COF exhibited excellent activity and selectivity for electrocatalytic CO2 conversion, with a maximum CO faradaic efficiency (FECO) of 97.1%. Mechanistic studies revealed that efficient charge transport along the COF backbone promoted electronic communication between the bimetallic active sites, enabling regulation of the intrinsic activity of each catalytic center and achieving high CO2 conversion efficiency.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Polymer Science
Jinsoo Yoon, Jaeseon Lee, Seong-Geun Oh
Summary: Bicomponent nanofibers of cellulose acetate (CA) and polyethylene imine (PEI) were successfully fabricated using electrospinning technique for CO2 gas capture. The nanofibers were characterized and their morphology was studied using FT-IR, XRD, TGA, and SEM. The CO2 adsorption capacity of the nanofiber membranes was investigated and found to increase with higher PEI content and lower temperature. The CA/PEI electrospun membrane showed 99% retention of its initial CO2 adsorption capacity after 5 cycles of adsorption and desorption.
Article
Nanoscience & Nanotechnology
R. L. S. Canevesi, S. Schaefer, M. T. Izquierdo, A. Celzard, V Fierro
Summary: This study investigates the impact of surface chemistry and pore structure on CO2 adsorption at different pressures. The findings suggest that surface chemistry primarily controls CO2 adsorption below atmospheric pressure, while pore structure becomes more significant as pressure increases. This study demonstrates that adsorption capacity is closely related to total pore volume and adsorbed density can be higher than liquid CO2 in ultramicropores at pressures above 15 bar.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Xiao-Lian Wang, Li-Tian Zhang, Shan He, Xiao-Xian Chen, Xiao-Chun Huang, Hao-Long Zhou
Summary: Covalent organic frameworks (COFs) are a class of crystalline porous materials with promising applications. However, the lack of an efficient and scalable synthesis protocol hinders their further application. This study proposes a synthesis method based on dynamic covalent chemistry, using imine exchange reactions, to rapidly prepare high-quality COFs with desirable structures.
CHEMISTRY OF MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Chaehoon Kim, Yejee Ha, Minkee Choi
Summary: Carbon dioxide (CO2) capture and storage (CCS) is crucial for enabling the use of fossil fuels while addressing environmental concerns. Among the CO2 capture technologies, postcombustion CO2 capture using solid adsorbents has gained attention due to its noncorrosive nature and low energy demand. However, the design of efficient and stable amine-containing adsorbents for postcombustion CO2 capture is a complex challenge. This article focuses on the development of energy-efficient adsorbents for CO2 capture via temperature swing adsorption (TSA). The key challenges include improving CO2 adsorption capacity, suppressing coadsorption of water, and enhancing the stability of the adsorbents. By combining macroporous silica hosts, alkyl-epoxide-functionalized poly(ethylenimine) (PEI), and phosphate-based oxidative stabilizers, the authors have synthesized adsorbents that exhibit low energy demands and high thermochemical stability. The discussions provide important insights for the practical design of adsorbents for CO2 capture.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Chemistry, Physical
Minji Jung, Jaewoo Park, Se Yeon Cho, Sally E. A. Elashery, Nour F. Attia, Hyunchul Oh
Summary: Novel and efficient flexible carbon sieves for landfill gas and biogas upgrading have been developed, showing enhanced and selective adsorption of CO2 over CH4. These carbon sieves exhibit the highest specific surface area and specific pore volume, with rich nitrogen and oxygen elemental composition.
SURFACES AND INTERFACES
(2021)
Article
Engineering, Environmental
Md A. Wahab, Jongbeom Na, Mostafa Kamal Masud, Md Shahriar A. Hossain, Asma A. Alothman, Ahmed Abdala
Summary: Nanoconfined graphitic nanoporous carbon nitride (gNPCN) adsorbents with a high content of inbuilt basic nitrogen were synthesized for efficient CO2 adsorption, showing superior performance compared to other adsorbents under identical conditions. The organized mesoporosity and tunable surface-structural properties contribute to the enhanced CO2 adsorption capacity of gNPCN materials, highlighting their potential for effective CO2 capture.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Energy & Fuels
Zhizhong Lin, Lang Liu, Chao Liu, Yang Liu
Summary: Through investigating the adsorption of CO2/N-2 mixtures in different carbon materials at varying temperatures, it was found that reducing pore size can enhance CO2 adsorption and selectivity, but may reduce selectivity for entropy effects; morphology significantly impacts adsorptive separation performance; increasing CO2 mole fraction can improve separation performance, while increasing temperature decreases it.
Article
Engineering, Chemical
D. Petukhov, M. A. Komkova, Ar A. Eliseev, A. A. Poyarkov, An A. Eliseev
Summary: The study reviews the performance of nanoporous gas-liquid polypropylene membrane contactors with NaOH absorbents for removing H2S and CO2 from gas streams. Experimental results show that operation conditions, absorbent saturation levels, and membrane parameters significantly affect the contactor efficiency. The mass transfer rates and removal efficiencies differ for H2S and CO2, allowing selective removal of H2S with high H2S/CO2 selectivity.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Chemistry, Physical
Wei Chen, Jianyu Gong, Xin Bi, Xin Huang, Zhihong Yang, Yunhui Wang
Summary: The ability of metal-embedded CN nanosheets to capture carbon dioxide was evaluated using Density Functional Theory (DFT) and Grand Canonical Monte Carlo (GCMC) simulations. The study found that Ca-embedded CN nanosheets could evenly adsorb six CO2, with a capture amount of 57.52 wt% according to computational results. The average adsorption energy of CO2 ranged from -0.204 eV to -0.452 eV. Therefore, the Ca@CN monolayers are considered ideal materials for CO2 capture.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Zhun Dong, Wenda Hu, Hongjun Liu, Zhenzhen Yang, Debabrata Moitra, De-en Jiang, Sheng Dai, Jian Zhi Hu, Di Wu, Hongfei Lin
Summary: It is found that treating UiO-66 with methanol solvent and thermal activation can significantly enhance its CO2 adsorption capacity. Methanol treatment effectively removes residual impurities in the micropores of UiO-66 and improves its surface area, pore volume, and void fraction, leading to a close-to-ideal CO2 adsorption capacity.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Minji Jung, Jaewoo Park, Raeesh Muhammad, Jin Yeong Kim, Veronika Grzimek, Margarita Russina, Hoi Ri Moon, Jitae T. Park, Hyunchul Oh
Summary: Kinetic-quantum-sieving-assisted H-2:D-2 separation in flexible porous materials is more effective than traditional methods like cryogenic distillation. Experimental observation shows significantly faster diffusion of deuterium compared to hydrogen in flexible pore structures, suggesting a new strategy for efficient isotope separation at higher temperatures. Further research is needed to explore this area in more depth.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Suhwan Kim, Raeesh Muhammad, Peter Schuetzenduebe, Suresh Babu Kalidindi, Gisela Schuetz, Hyunchul Oh, Kwanghyo Son
Summary: The combination of magnetic Pd NPs with UiO-66(Hf) results in enhanced magnetic properties, leading to strongly ferromagnetic hybrid structures with high magnetization and coercivity. The magnetization of the hybridized structure is analyzed using a modified Langevin function, showing a 2 to 3 times increase in magnetic property.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Raeesh Muhammad, Seohyeon Jee, Minji Jung, Jaewoo Park, Sung Gu Kang, Kyung Min Choi, Hyunchul Oh
Summary: The use of cobalt formate in isotope-responsive separation showed a promising potential, with a D-2/H-2 selectivity of up to 44 at 25 K/1 bar. The discovery of a D-2-responsive third sorption step enhanced the uptake difference between D-2 and H-2, making the separation performance more efficient. Scaling up the synthesis of cobalt formate on a gram-scale presents a prospect for commercialization.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Materials Science, Paper & Wood
Sudiksha Aggrawal, Debabrata Pradhan, Paritosh Mohanty
Summary: In this study, CuO nanoflakes with dimensions of 50-150 nm x 200 nm were successfully immobilized on cellulose fibers using an ultrafast microwave assisted method. The high retention rate of CuO up to 70% without the use of any linker, binder, or retention aid is remarkable. The research also demonstrated the antimicrobial activity of CuO immobilized paper matrices.
Article
Chemistry, Applied
Sarika Yadav, Naveen Beniwal, Pawan Rekha, Lovjeet Singh
Summary: The prospective applications of porous zirconium phosphate (ZrP) have attracted much attention due to its high surface area and various potential uses. This review discusses the general synthesis approaches for manufacturing porous ZrP materials, their benefits and drawbacks, as well as the current development trends and future perspectives based on different components and applications.
JOURNAL OF POROUS MATERIALS
(2022)
Article
Polymer Science
Anuj Rawat, Raeesh Muhammad, Vimal Chandra Srivastava, Paritosh Mohanty
Summary: The hypercrosslinking of benzene using formaldehyde dimethyl acetal as the crosslinker, anhydrous ferric chloride as the catalyst, and 1,2 dichloroethane as the solvent for the synthesis of poly-benz is reported. Microwave-assisted synthesis resulted in the formation of nanoporous poly-benz with a specific surface area of 1168 m2 g-1 within 60 minutes. Thorough analysis using NMR and XPS revealed the hypercrosslinking at the meta position of the benzene ring. The synthesized poly-benz showed a high CO2 capture capacity of 65.3 wt % at 298 K and 30 bar, and different adsorption isotherm models were fitted to represent the equilibrium CO2 adsorption data at various temperatures.
Article
Energy & Fuels
Arun Kumar, Bhisma Narayan Mahanty, Anuj Rawat, Raeesh Muhammad, Rajib Kumar Panigrahi, Debabrata Pradhan, Paritosh Mohanty
Summary: Transition-metal-substituted manganese ferrites, Mn0.95M0.05Fe2O4 (M: Co, Cu, and Zn), synthesized by combustion method, exhibit a single-phase cubic spinel structure with high specific surface area and controlled pore size distribution and volume. These ferrites are useful as active electrode materials for electrochemical supercapacitors, with Mn0.95Zn0.05Fe2O4 showing the best capacitance in nonaqueous electrolytes. The effect of redox additive electrolytes on capacitance was also studied. A symmetric pouch cell supercapacitor device fabricated using Mn0.95Zn0.05Fe2O4 and a redox-active electrolyte provides high energy and power densities, demonstrating stability and high Coulombic efficiencies.
Article
Chemistry, Inorganic & Nuclear
Suhwan Kim, Raeesh Muhammad, Kwanghyo Son, Hyunchul Oh
Summary: Heterogenized metal-organic frameworks (MOFs) obtained from the reaction of Gd3+ and Dy3+ ions exhibit high magnetic entropy change and temperature for magnetic refrigeration, providing the possibility of extending the working temperature of magnetic cooling materials.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Raeesh Muhammad, Yoon-Chae Nah, Hyunchul Oh
Summary: A method for preparing high surface area nanoporous activated carbon fibers from spider silk (a natural biomaterial) using potassium hydroxide activation is reported. The fibers have a high specific surface area and oxygen-rich surface, providing enhanced CO2 capture and storage capacity for energy carrier gases (H-2 and CH4). The fibers also demonstrate easy regeneration and minimal loss in uptake capacity. This study shows that biomaterials can be effectively converted into high surface area activated carbon fibers for advanced energy and environmental applications.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Energy & Fuels
Jasasmita Das, Ruchi Sharma, Sachin Balhara, Paritosh Mohanty
Summary: Heteroatom enriched cyclophosphazene and triazine based hybrid nanoporous material (CTHM-2) is an efficient metal free catalyst for converting CO2 to valuable products under thermochemical and electrochemical conditions. The catalyst shows high conversion rates and selectivity for cyclic and polycarbonate products, as well as good retention of activity after multiple cycles. It also demonstrates versatility as an electrocatalyst for CO2 conversion to methanol with high Faradic efficiency.
Article
Chemistry, Multidisciplinary
Raeesh Muhammad, Suhwan Kim, Jaewoo Park, Minji Jung, Myoung Eun Lee, Jaewoo Chung, Haenam Jang, Hyunchul Oh
Summary: By utilizing calcium-rich porous carbon derived from onion peel, a method to separate D-2 from a hydrogen isotopic mixture was successfully achieved, with the calcium enhancing the material's affinity towards D-2, showing promising selectivity and binding strength.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Physical
Ruchi Sharma, Raeesh Muhammad, Vimal Chandra Srivastava, Paritosh Mohanty
Summary: In this study, inexpensive and nontoxic metal-free heteroatom enriched nanoporous materials were used as efficient catalysts for the conversion of epoxides to cyclic carbonates utilizing CO2. The catalysts, HNM and CHNM, were synthesized by condensing heteroatom enriched precursors with melamine and pyrrole. Under mild experimental conditions, almost 100% conversion was achieved using HNM as a catalyst, attributed to the presence of larger heteroatoms compared to CHNM despite its higher specific surface area and pore volume. Discussions were made on Lewis acid-Lewis base interaction, textural properties, and frameworks of the catalysts and reactants in relation to the obtained results.
SUSTAINABLE ENERGY & FUELS
(2021)
