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da Silva ÉFM, Garcia RRP, Rodrigues LA, Napoleão DC, Sanz O, Almeida LC. Enhancement of effluent degradation by zinc oxide, carbon nitride, and carbon xerogel trifecta on brass monoliths. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34770-0. [PMID: 39190249 DOI: 10.1007/s11356-024-34770-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2024] [Accepted: 08/16/2024] [Indexed: 08/28/2024]
Abstract
In recent years, heterogeneous photocatalysis has emerged as a promising alternative for the treatment of organic pollutants. This technique offers several advantages, such as low cost and ease of operation. However, finding a semiconductor material that is both operationally viable and highly active under solar irradiation remains a challenge, often requiring materials of nanometric size. Furthermore, in many processes, photocatalysts are suspended in the solution, requiring additional steps to remove them. This can render the technique economically unviable, especially for nanosized catalysts. This work demonstrated the feasibility of using a structured photocatalyst (ZnO, g-C3N4, and carbon xerogel) optimized for this photodegradation process. The synthesized materials were characterized by nitrogen adsorption and desorption, X-ray diffraction (XRD), and diffuse reflectance spectroscopy (DRS). Adhesion testing demonstrated the efficiency of the deposition technique, with film adhesion exceeding 90%. The photocatalytic evaluation was performed using a mixture of three textile dyes in a recycle photoreactor, varying pH (4.7 and 10), recycle flow rate (2, 4, and 6 L h-1), immobilized mass (1, 2, and 3 mg cm-2), monolith height (1.5, 3.0, and 4.5 cm), and type of radiation (solar and visible artificials; and natural solar). The structured photocatalyst degraded over 99% of the dye mixture under artificial radiation. The solar energy results are highly promising, achieving a degradation efficiency of approximately 74%. Furthermore, it was possible to regenerate the structured photocatalyst up to seven consecutive times using exclusively natural solar light and maintain a degradation rate of around 70%. These results reinforce the feasibility and potential application of this system in photocatalytic reactions, highlighting its effectiveness and sustainability.
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Affiliation(s)
- Émerson Felipe Mendonça da Silva
- Department of Chemical Engineering, Technology and Geoscience Center, Federal University of Pernambuco, Recife, PE, 50740-521, Brazil
| | - Ramón Raudel Peña Garcia
- Pós Graduate Program in Materials Science and Engineering, Federal University of Piauí, Teresina, PI, 64049-550, Brazil
- Academic Unit of Cabo de Santo Agostinho, Federal Rural University of Pernambuco, Cabo de Santo Agostinho, PE, 54518-430, Brazil
| | - Liana Alvares Rodrigues
- Escola de Engenharia de Lorena EEL/USP, Estrada Municipal Do Campinho S/N, Lorena, São Paulo, CEP 12602-810, Brazil
| | - Daniella Carla Napoleão
- Department of Chemical Engineering, Technology and Geoscience Center, Federal University of Pernambuco, Recife, PE, 50740-521, Brazil
| | - Oihane Sanz
- Dept. of Applied Chemistry, Chemistry Faculty, University of the Basque Country, UPV/EHU, P. Lardizabala, 3, 20018, San Sebastian, Spain
| | - Luciano Costa Almeida
- Department of Chemical Engineering, Technology and Geoscience Center, Federal University of Pernambuco, Recife, PE, 50740-521, Brazil.
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Payam AF, Khalil S, Chakrabarti S. Synthesis and Characterization of MOF-Derived Structures: Recent Advances and Future Perspectives. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2310348. [PMID: 38660830 DOI: 10.1002/smll.202310348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 03/11/2024] [Indexed: 04/26/2024]
Abstract
Due to their facile tunability, metal-organic frameworks (MOFs) are employed as precursors and templates to construct advanced functional materials with unique and desired chemical, physical, mechanical, and morphological properties. By tuning MOF precursor composition and manipulating conversion processes, various MOF-derived materials commonly known as MOF derivatives can be constructed. The possibility of controlled and predictable properties makes MOF derivatives a preferred choice for numerous advanced technological applications. The innovative synthetic designs besides the plethora of interdisciplinary characterization approaches applicable to MOF derivatives provide the opportunity to perform a myriad of experiments to explore the performance and offer key insight to develop the next generation of advanced materials. Though there are many published works of literature describing various synthesis and characterization techniques of MOF derivatives, it is still not clear how the synthesis mechanism works and what are the best techniques to characterize these materials to probe their properties accurately. In this review, the recent development in synthesis techniques and mechanisms for a variety of MOF derivates such as MOF-derived metal oxides, porous carbon, composites/hybrids, and sulfides is summarized. Furthermore, the details of characterization techniques and fundamental working principles are summarized to probe the structural, mechanical, physiochemical, electrochemical, and electronic properties of MOF and MOF derivatives. The future trends and some remaining challenges in the synthesis and characterization of MOF derivatives are also discussed.
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Affiliation(s)
- Amir Farokh Payam
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, Ulster University, 2-24 York Street, Belfast, BT15 1AP, UK
| | - Sameh Khalil
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, Ulster University, 2-24 York Street, Belfast, BT15 1AP, UK
| | - Supriya Chakrabarti
- Nanotechnology and Integrated Bioengineering Centre (NIBEC), School of Engineering, Ulster University, 2-24 York Street, Belfast, BT15 1AP, UK
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3
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Briševac D, Gabelica I, Ljubas D, Bafti A, Matijašić G, Ćurković L. Effects of TiO 2 Nanoparticles Synthesized via Microwave Assistance on Adsorption and Photocatalytic Degradation of Ciprofloxacin. Molecules 2024; 29:2935. [PMID: 38930999 PMCID: PMC11207004 DOI: 10.3390/molecules29122935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2024] [Revised: 06/15/2024] [Accepted: 06/18/2024] [Indexed: 06/28/2024] Open
Abstract
In this study, the optimal microwave-assisted sol-gel synthesis parameters for achieving TiO2 nanoparticles with the highest specific surface area and photocatalytic activity were determined. Titanium isopropoxide was used as a precursor to prepare the sol (colloidal solution) of TiO2. Isopropanol was used as a solvent; acetylacetone was used as a complexation moderator; and nitric acid was used as a catalyst. Four samples of titanium dioxide were synthesized from the prepared colloidal solution in a microwave reactor at a temperature of 150 °C for 30 min and at a temperature of 200 °C for 10, 20, and 30 min. The phase composition of the TiO2 samples was determined by X-ray diffraction analysis (XRD) and Fourier-transform infrared spectroscopy (FTIR). Nitrogen adsorption/desorption isotherms were used to determine the specific surface area and pore size distributions using the Brunauer-Emmett-Teller (BET) method. The band-gap energy values of the TiO2 samples were determined by diffuse reflectance spectroscopy (DRS). The distribution of Ti and O in the TiO2 samples was determined by SEM-EDS analysis. The effects of adsorption and photocatalytic activity of the prepared TiO2 samples were evaluated by the degradation of ciprofloxacin (CIP) as an emerging organic pollutant (EOP) under UV-A light (365 nm). The results of the photocatalytic activity of the synthesized TiO2 nanoparticles were compared to the benchmark Degussa P25 TiO2. Kinetic parameters of adsorption and photocatalysis were determined and analyzed. It was found that crystalline TiO2 nanoparticles with the highest specific surface area, the lowest energy band gap, and the highest photocatalytic degradation were the samples synthesized at 200 °C for 10 min. The results indicate that CIP degradation by all TiO2 samples prepared at 200 °C show a synergistic effect of adsorption and photocatalytic degradation in the removal process.
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Affiliation(s)
- Debora Briševac
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
| | - Ivana Gabelica
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
| | - Davor Ljubas
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
| | - Arijeta Bafti
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (A.B.); (G.M.)
| | - Gordana Matijašić
- Faculty of Chemical Engineering and Technology, University of Zagreb, 10000 Zagreb, Croatia; (A.B.); (G.M.)
| | - Lidija Ćurković
- Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10000 Zagreb, Croatia; (D.B.); (I.G.); (D.L.)
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4
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Kikkinides ES, Enke D, Valiullin R. Gas Sorption Characterization of Porous Materials Employing a Statistical Theory for Bethe Lattices. J Phys Chem A 2024; 128:4573-4587. [PMID: 38787333 PMCID: PMC11163428 DOI: 10.1021/acs.jpca.4c02185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 05/16/2024] [Accepted: 05/16/2024] [Indexed: 05/25/2024]
Abstract
In the present work, a recently developed statistical theory for adsorption and desorption processes in mesoporous solids, modeled by random Bethe lattices, has been applied to obtain pore size distributions and interpore connectivity from sorption isotherms in real random porous materials, employing a robust and validated methodology. Using the experimental adsorption-desorption N2 isotherms at 77.4 K on Vycor glass, a porous material with random pore structure, we demonstrate the solution of the inverse problem resulting in extracted pore size distribution and interpore connectivity, notably different from the predictions of earlier theories. The results presented are corroborated by the analysis of 3D digital images of reconstructed Vycor porous glass, showing excellent agreement between the predictions of geometric analysis and the new statistical theory.
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Affiliation(s)
- E. S. Kikkinides
- Department
of Chemical Engineering, Aristotle University
of Thessaloniki, 54124 Thessaloniki, Greece
| | - D. Enke
- Faculty
of Chemistry and Mineralogy, Leipzig University, 04103 Leipzig, Germany
| | - R. Valiullin
- Faculty
of Physics and Earth System Sciences, Leipzig
University, 04103 Leipzig, Germany
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5
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Sei H, Oka K, Hori Y, Shigeta Y, Tohnai N. Network topology diversification of porous organic salts. Chem Sci 2024; 15:8008-8018. [PMID: 38817574 PMCID: PMC11134405 DOI: 10.1039/d4sc01218f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 04/29/2024] [Indexed: 06/01/2024] Open
Abstract
Hydrogen-bonded organic frameworks (HOFs) are porous organic materials constructed via hydrogen bonds. HOFs have solubility in specific high-polar organic solvents. Therefore, HOFs can be returned to their components and can be reconstructed, which indicates their high recyclability. Network topologies, which are the frameworks of porous structures, control the pore sizes and shapes of HOFs. Therefore, they strongly affect the functions of porous materials. However, hydrogen bonds are usually weak interactions, and the design of the intended network topology in HOFs from their components has been challenging. Porous organic salts (POSs) are an important class of HOFs, are hierarchically constructed via strong charge-assisted hydrogen bonds between sulfonic acids and amines, and therefore are expected to have high designability of the porous structure. However, the network topology of POSs has been limited to only dia-topology. Here, we combined tetrasulfonic acid with the adamantane core (4,4',4'',4'''-(adamantane-1,3,5,7-tetrayl)tetrabenzenesulfonic acid; AdPS) and triphenylmethylamines with modified substituents in para-positions of benzene rings (TPMA-X, X = F, methyl (Me), Cl, Br, I). We changed the steric hindrance between the adamantane and substituents (X) in TPMA-X and obtained not only the common dia-topology for POSs but also rare sod-topology, and lon- and uni-topologies that are formed for the first time in HOFs. Changing template molecules under preparation helped in successfully isolating the porous structures of AdPS/TPMA-Me with dia-, lon-, and sod-topologies which exhibited different gas adsorption properties. Therefore, for the first time, we demonstrated that the steric design of HOF components facilitated the formation, diversification, and control of the network topologies and functions of HOFs.
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Affiliation(s)
- Hiroi Sei
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamadaoka, Suita Osaka 565-0871 Japan
| | - Kouki Oka
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamadaoka, Suita Osaka 565-0871 Japan
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University 2-1-1 Katahira, Aoba-ku Sendai Miyagi 980-8577 Japan
| | - Yuta Hori
- Center for Computational Sciences, University of Tsukuba 1-1-1 Tennodai Tsukuba Ibaraki 305-8577 Japan
| | - Yasuteru Shigeta
- Center for Computational Sciences, University of Tsukuba 1-1-1 Tennodai Tsukuba Ibaraki 305-8577 Japan
| | - Norimitsu Tohnai
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University 2-1 Yamadaoka, Suita Osaka 565-0871 Japan
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6
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Tritean N, Trică B, Dima ŞO, Capră L, Gabor RA, Cimpean A, Oancea F, Constantinescu-Aruxandei D. Mechanistic insights into the plant biostimulant activity of a novel formulation based on rice husk nanobiosilica embedded in a seed coating alginate film. FRONTIERS IN PLANT SCIENCE 2024; 15:1349573. [PMID: 38835865 PMCID: PMC11148368 DOI: 10.3389/fpls.2024.1349573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 04/17/2024] [Indexed: 06/06/2024]
Abstract
Seed coating ensures the targeted delivery of various compounds from the early stages of development to increase crop quality and yield. Silicon and alginate are known to have plant biostimulant effects. Rice husk (RH) is a significant source of biosilica. In this study, we coated mung bean seeds with an alginate-glycerol-sorbitol (AGS) film with embedded biogenic nanosilica (SiNPs) from RH, with significant plant biostimulant activity. After dilute acid hydrolysis of ground RH in a temperature-controlled hermetic reactor, the resulting RH substrate was neutralized and calcined at 650°C. The structural and compositional characteristics of the native RH, the intermediate substrate, and SiNPs, as well as the release of soluble Si from SiNPs, were investigated. The film for seed coating was optimized using a mixture design with three factors. The physiological properties were assessed in the absence and the presence of 50 mM salt added from the beginning. The main parameters investigated were the growth, development, metabolic activity, reactive oxygen species (ROS) metabolism, and the Si content of seedlings. The results evidenced a homogeneous AGS film formation embedding 50-nm amorphous SiNPs having Si-O-Si and Si-OH bonds, 0.347 cm3/g CPV (cumulative pore volume), and 240 m2/g SSA (specific surface area). The coating film has remarkable properties of enhancing the metabolic, proton pump activities and ROS scavenging of mung seedlings under salt stress. The study shows that the RH biogenic SiNPs can be efficiently applied, together with the optimized, beneficial alginate-based film, as plant biostimulants that alleviate saline stress from the first stages of plant development.
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Affiliation(s)
- Naomi Tritean
- National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Bucharest, Romania
- Faculty of Biology, University of Bucharest, Bucharest, Romania
| | - Bogdan Trică
- National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Bucharest, Romania
| | - Ştefan-Ovidiu Dima
- National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Bucharest, Romania
| | - Luiza Capră
- National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Bucharest, Romania
| | - Raluca-Augusta Gabor
- National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Bucharest, Romania
| | | | - Florin Oancea
- National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Bucharest, Romania
- Faculty of Biotechnologies, University of Agronomic Sciences and Veterinary Medicine of Bucharest, Bucharest, Romania
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7
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Wang Q, Li M, Xi M, Zhao M, Wang X, Chen X, Ding L. Recovery of Ag(I) from Wastewater by Adsorption: Status and Challenges. TOXICS 2024; 12:351. [PMID: 38787130 PMCID: PMC11125793 DOI: 10.3390/toxics12050351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 05/08/2024] [Accepted: 05/09/2024] [Indexed: 05/25/2024]
Abstract
Untreated or inadequately treated silver-containing wastewater may pose adverse effects on hu-man health and the ecological environment. Currently, significant progress has been made in the treatment of Ag(I) in wastewater using adsorption methods, with adsorbents playing a pivotal role in this process. This paper provides a systematic review of various adsorbents for the recovery and treatment of Ag(I) in wastewater, including MOFs, COFs, transition metal sulfides, metal oxides, biomass materials, and other polymeric materials. The adsorption mechanisms of these materials for Ag(I) are elaborated upon, along with the challenges currently faced. Furthermore, insights into optimizing adsorbents and developing novel adsorbents are proposed in this study.
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Affiliation(s)
- Qiang Wang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
- National−Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China
| | - Mengling Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
- National−Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China
| | - Meng Xi
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
- National−Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China
| | - Mengyuan Zhao
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
- National−Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China
| | - Xiaotong Wang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
- National−Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China
| | - Xiaoyu Chen
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
- National−Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China
| | - Lin Ding
- Key Laboratory of Jiangxi Province for Persistent Pollutants Prevention Control and Resource Reuse, Nanchang Hangkong University, Nanchang 330063, China
- National−Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang 330063, China
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8
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Zelenka T, Zelená L, Abreu-Jaureguí C, Silvestre-Albero J, Zelenková G, Slovák V. On the Low-Pressure Hysteresis (LPH) in Gas Sorption Isotherms of Porous Carbons. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2311990. [PMID: 38712451 DOI: 10.1002/smll.202311990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 04/08/2024] [Indexed: 05/08/2024]
Abstract
This study investigates the origin of low-pressure hysteresis (LPH) in the adsorption and desorption of three different probe molecules: carbon dioxide, nitrogen, and argon, across various adsorption temperatures (from cryogenic to room temperature), and within five different carbon materials: synthetic carbons (pristine and one post-synthetically oxidized) and natural coal. Significant attention is dedicated to elucidating LPH in oxidized samples outgassed at various temperatures (120-350 °C). Experimental results show that insufficient outgassing temperature can lead to unreliable data due to artificial LPH and significantly underestimated textural properties, primarily caused by porosity blockage from substances like moisture. Conversely, in samples where heteroatoms have a stabilizing effect on texture, such as natural coal, careful consideration of outgassing temperature is crucial due to the risk of thermal degradation. Other factors contributing to LPH are adsorption temperature, and especially, kinetic limitations at cryogenic temperatures for cellulose-based carbons. Minor factors responsible for LPH are the physical state of the sample (monolith vs powder) and the flexibility of the porous system, both studied by carbon dioxide sorption. This study constitutes an important piece in the evaluation of LPH, providing practical recommendations and underlining the importance of experimental design, with implications for further research in this complex field.
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Affiliation(s)
- Tomáš Zelenka
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. dubna 22, Ostrava, CZ-702 00, Czech Republic
| | - Lucie Zelená
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. dubna 22, Ostrava, CZ-702 00, Czech Republic
- Department of Inorganic Chemistry, Faculty of Science, P. J. Šafárik University, Moyzesova 11, Košice, SK-041 01, Slovak Republic
| | - Coset Abreu-Jaureguí
- Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica-Instituto Universitario de Materiales, Universidad de Alicante, San Vicente del Raspeig, E-03690, Spain
| | - Joaquin Silvestre-Albero
- Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica-Instituto Universitario de Materiales, Universidad de Alicante, San Vicente del Raspeig, E-03690, Spain
| | - Gabriela Zelenková
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. dubna 22, Ostrava, CZ-702 00, Czech Republic
| | - Václav Slovák
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. dubna 22, Ostrava, CZ-702 00, Czech Republic
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9
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Garvie LAJ, Trif L, Cotto-Figueroa D, Asphaug E, Hoover CG. High surface area and interconnected nanoporosity of clay-rich astromaterials. Sci Rep 2024; 14:10358. [PMID: 38710781 DOI: 10.1038/s41598-024-61114-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 05/02/2024] [Indexed: 05/08/2024] Open
Abstract
Porosity affects key astromaterial processes from disruption in our atmosphere and impact with the ground, to the comminution of boulders by thermal and impact processes and slope mechanics on asteroid surfaces, to access and utilization of in-situ resources. Whereas the bulk porosity of clay-rich meteorites is well established, the magnitude of their surface area and nano-scale porosity is poorly known. Here we use N2 BET gas adsorption to measure the specific surface area and nanoscale pore distribution in several clay-rich meteorites. Two recent falls Tarda (C2-ung) and Aguas Zarcas (CM2) have specific surface areas of 72.5 and 16.5 m2/g, respectively. However, the specific surface area of Tarda ranges from 33.7 to 81.6 m2/g depending on outgassing conditions. The Tarda surface area is dominated by an interconnected network of ~ 3-nm-sized pores, whereas Aguas Zarcas shows a lower density of ~ 3 nm pores and broader size distribution around 40 nm. In contrast, Ivuna and Orgueil (CI1) have surface areas of ~ 15 to 18 m2/g: the low values compared to Tarda are likely due to the neoformation of pore-blocking minerals during atmospheric exposure. These data suggest that returned samples from asteroids Ryugu and Bennu, which are mineralogically and texturally similar to Tarda, also have interconnected nano-scale porosity with high surface area.
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Affiliation(s)
- Laurence A J Garvie
- Buseck Center for Meteorite Studies, Arizona State University, 781 East Terrace Rd., Tempe, AZ, 85287‑6004, USA.
- School of Earth and Space Exploration, Arizona State University, 781 East Terrace Rd., Tempe, AZ, 85287‑6004, USA.
| | - László Trif
- Institute of Materials and Environmental Chemistry, Research Center for Natural Sciences, Magyar tudósok körútja 2, Budapest, 1117, Hungary
| | - Desireé Cotto-Figueroa
- Department of Physics and Electronics, The University of Puerto Rico at Humacao, Call Box 860, Humacao, PR, 00792, USA
| | - Erik Asphaug
- Lunar and Planetary Laboratory, University of Arizona, PO Box 210092, Tucson, AZ, 85721, USA
| | - Christian G Hoover
- School of Sustainable Engineering and the Built Environment, Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, AZ, 85287, USA
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10
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Kostoglou N, Stock S, Solomi A, Holzapfel DM, Hinder S, Baker M, Constantinides G, Ryzhkov V, Maletaskic J, Matovic B, Schneider JM, Rebholz C, Mitterer C. The Roles of Impurities and Surface Area on Thermal Stability and Oxidation Resistance of BN Nanoplatelets. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:601. [PMID: 38607135 PMCID: PMC11013371 DOI: 10.3390/nano14070601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 03/22/2024] [Accepted: 03/24/2024] [Indexed: 04/13/2024]
Abstract
This study considers the influence of purity and surface area on the thermal and oxidation properties of hexagonal boron nitride (h-BN) nanoplatelets, which represent crucial factors in high-temperature oxidizing environments. Three h-BN nanoplatelet-based materials, synthesized with different purity levels and surface areas (~3, ~56, and ~140 m2/g), were compared, including a commercial BN reference. All materials were systematically analyzed by various characterization techniques, including gas pycnometry, scanning electron microscopy, X-ray diffraction, Fourier-transform infrared radiation, X-ray photoelectron spectroscopy, gas sorption analysis, and thermal gravimetric analysis coupled with differential scanning calorimetry. Results indicated that the thermal stability and oxidation resistance of the synthesized materials were improved by up to ~13.5% (or by 120 °C) with an increase in purity. Furthermore, the reference material with its high purity and low surface area (~4 m2/g) showed superior performance, which was attributed to the minimized reactive sites for oxygen diffusion due to lower surface area availability and fewer possible defects, highlighting the critical roles of both sample purity and accessible surface area in h-BN thermo-oxidative stability. These findings highlight the importance of focusing on purity and surface area control in developing BN-based nanomaterials, offering a path to enhance their performance in extreme thermal and oxidative conditions.
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Affiliation(s)
- Nikolaos Kostoglou
- Department of Materials Science, Montanuniversität Leoben, 8700 Leoben, Austria; (A.S.); (C.R.); (C.M.)
| | - Sebastian Stock
- Department Physics, Mechanics and Electrical Engineering, Montanuniversität Leoben, 8700 Leoben, Austria;
| | - Angelos Solomi
- Department of Materials Science, Montanuniversität Leoben, 8700 Leoben, Austria; (A.S.); (C.R.); (C.M.)
- Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia 2109, Cyprus
| | - Damian M. Holzapfel
- Materials Chemistry, RWTH Aachen University, 52074 Aachen, Germany; (D.M.H.); (J.M.S.)
| | - Steven Hinder
- Department of Mechanical Engineering Sciences, University of Surrey, Guildford GU2 7XH, UK; (S.H.); (M.B.)
| | - Mark Baker
- Department of Mechanical Engineering Sciences, University of Surrey, Guildford GU2 7XH, UK; (S.H.); (M.B.)
| | - Georgios Constantinides
- Department of Mechanical Engineering and Materials Science and Engineering, Cyprus University of Technology, Lemesos 3036, Cyprus;
| | - Vladislav Ryzhkov
- Research School of High-Energy Physics, Tomsk Polytechnic University, 634050 Tomsk, Russia;
| | - Jelena Maletaskic
- Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (J.M.); (B.M.)
| | - Branko Matovic
- Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (J.M.); (B.M.)
| | - Jochen M. Schneider
- Materials Chemistry, RWTH Aachen University, 52074 Aachen, Germany; (D.M.H.); (J.M.S.)
| | - Claus Rebholz
- Department of Materials Science, Montanuniversität Leoben, 8700 Leoben, Austria; (A.S.); (C.R.); (C.M.)
- Department of Mechanical and Manufacturing Engineering, University of Cyprus, Nicosia 2109, Cyprus
| | - Christian Mitterer
- Department of Materials Science, Montanuniversität Leoben, 8700 Leoben, Austria; (A.S.); (C.R.); (C.M.)
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11
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Shanmugam P, Parasuraman B, Boonyuen S, Thangavelu P, AlSalhi MS, Zheng ALT, Viji A. Hydrothermal synthesis and photocatalytic application of ZnS-Ag composites based on biomass-derived carbon aerogel for the visible light degradation of methylene blue. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2024; 46:92. [PMID: 38367085 DOI: 10.1007/s10653-024-01871-1] [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: 11/28/2023] [Accepted: 01/12/2024] [Indexed: 02/19/2024]
Abstract
A facile and cost-effective hydrothermal followed by precipitation method is employed to synthesize visible light-driven ZnS-Ag ternary composites supported on carbon aerogel (CA). Extensive studies were conducted on the structural, morphological, and optical properties, confirming the successful formation of ternary nanocomposites. The obtained results evidently demonstrate the successful loading of ZnS and Ag onto the surface of the CA. High-resolution transmission electron microscopy analysis revealed that ZnS and Ag nanoparticles (AgNPs) were uniformly distributed on the surface of the CA with an average diameter of 18 nm. The biomass-derived CA, containing a hierarchical porous nano-architecture and an abundant number of -NH2 functional groups on the surface, can greatly prevent the agglomeration, stability and reduce particle size. Brunauer-Emmett-Teller analysis results indicated specific surface areas of 4.62 m2 g-1 for the CA, 48.50 m2 g-1 for the CA/ZnS composite, and 62.62 m2 g-1 for the CA/ZnS-Ag composite. These values demonstrate an increase in surface area upon the incorporation of ZnS and Ag into the CA matrix. Under visible light irradiation, the synthesized CA/ZnS-Ag composites displayed remarkably improved photodegradation efficiency of methylene blue (MB). Among the tested samples, the CA/ZnS-Ag composites exhibited the highest percentage of photodegradation efficiency, surpassing ZnS, CA, and CA/ZnS. The obtained percentages of degradation efficiency for CA, ZnS, CA/ZnS, and CA/ZnS-Ag composites were determined as 26.60%, 52.12%, 68.39%, and 98.64%, respectively. These results highlight the superior photocatalytic performance of the CA/ZnS-Ag composites in the degradation of MB under visible light conditions. The superior efficiency of the CA/ZnS-Ag composite can be attributed to multiple factors, including its elevated specific surface area, inhibition of electron-hole pair recombination, and enhanced photon absorption within the visible light spectrum. The CA/ZnS-Ag composites displayed consistent efficiency over multiple cycles, confirming their stable performance, reusability, and enduring durability, thereby showcasing the robust nature of this composite material.
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Affiliation(s)
- Paramasivam Shanmugam
- Department of Chemistry, Faculty of Science and Technology, Thammasat University, Pathum Thani, 12120, Thailand
| | - Balaji Parasuraman
- Smart Materials Laboratory, Department of Physics, Periyar University, Salem, Tamilnadu, 636011, India
| | - Supakorn Boonyuen
- Department of Chemistry, Faculty of Science and Technology, Thammasat University, Pathum Thani, 12120, Thailand.
| | - Pazhanivel Thangavelu
- Smart Materials Laboratory, Department of Physics, Periyar University, Salem, Tamilnadu, 636011, India
| | - Mohamad S AlSalhi
- Department of Physics and Astronomy, College of Science, King Saud University, P. O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Alvin Lim Teik Zheng
- Department of Science and Technology, Faculty of Humanities, Management and Science, Universiti Putra Malaysia Bintulu Campus, Bintulu, Sarawak, Malaysia
| | - A Viji
- Department of Physics, Kongunadu College of Engineering and Technology, Thottiyam, Tamil Nadu, 621215, India
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12
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Loi QK, Do DD. Effects of the adsorbate-gas interface at the pore opening on the lower closure point in gaseous adsorption in porous solids. J Colloid Interface Sci 2024; 654:592-601. [PMID: 37862808 DOI: 10.1016/j.jcis.2023.10.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 09/29/2023] [Accepted: 10/08/2023] [Indexed: 10/22/2023]
Abstract
The limit to the lower closure point (LCP) observed experimentally in the desorption isotherm of gases in porous solids has been commonly attributed to the homogeneous cavitation of the condensate in cavities. It was proposed recently that the experimental limit to LCP could be described in simulations with the ink-bottle pore, provided that the length of the uniformly sized conduit connecting the closed cavity to the surrounding is shorter than 2 nm, and the evaporation is by way of pore blocking mechanism, rather than homogeneous cavitation. To substantiate this assertion, that deviates from the commonly belief of homogeneous cavitation, we further investigated in this paper with cavities having wedge-like pore opening, that better mimics real solids, and offer further explanation on the limit of the LCP to the pore blocking as the mechanism of evaporation with simulations of argon and nitrogen adsorption over a range of temperatures that are commonly used experimentally. It was found that simulation results correctly captured the experimental observations for carbon-based materials and silica-based materials in that the limit of LCP shifts to higher reduced pressures for weaker adsorbing silica, compared to stronger adsorbing carbon and for a given adsorbent it also shifts to higher reduced pressure for higher temperatures.
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Affiliation(s)
- Quang K Loi
- Centre for Theoretical and Computational Molecular Science, Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, St Lucia, QLD 4072, Australia
| | - D D Do
- School of Chemical Engineering, The University of Queensland, St Lucia, QLD 4072, Australia.
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13
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Gosch J, Guiotto V, Steinke F, Svensson Grape E, Atzori C, Mertin K, Otto T, Ruser N, Meier C, Morelli Venturi D, Inge AK, Lomachenko KA, Crocellà V, Stock N. Discovery and In Situ Crystallization Studies of Cerium-Based Metal-Organic Frameworks with V-Shaped Linker Molecules. Inorg Chem 2023; 62:20929-20939. [PMID: 38048322 DOI: 10.1021/acs.inorgchem.3c01862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
We report the discovery and characterization of two porous Ce(III)-based metal-organic frameworks (MOFs) with the V-shaped linker molecules 4,4'-sulfonyldibenzoate (SDB2-) and 4,4'-(hexafluoroisopropylidene)bis(benzoate) (hfipbb2-). The compounds of framework composition [Ce2(H2O)(SDB)3] (1) and [Ce2(hfipbb)3] (2) were obtained by using a synthetic approach in acetonitrile that we recently established. Structure determination of 1 was accomplished from 3D electron diffraction (3D ED) data, while 2 could be refined against powder X-ray diffraction (PXRD) data using the crystal structure of an isostructural La-MOF as the starting model. Their framework structures consist of chain-like inorganic building units (IBUs) or hybrid-BUs that are interconnected by the V-shaped linker molecules to form framework structures with channel-type pores. The composition of both compounds was confirmed by PXRD, elemental analysis, as well as NMR and IR spectroscopy. Interestingly, despite the use of (NH4)2[CeIV(NO3)6] in the synthesis, cerium ions in both MOFs occur exclusively in the + III oxidation state as determined by X-ray absorption near edge structure (XANES) and X-ray photoelectron spectroscopy (XPS). Thermal analyses reveal remarkably high thermal stabilities of ≥400 °C for the MOFs. Initial N2 sorption measurements revealed the peculiar sorption behavior of 2 which prompted a deeper investigation by Ar and CO2 sorption experiments. The combination with nonlocal density functional theory (NL-DFT) calculations adds to the understanding of the nature of the different pore diameters in 2. An extensive quasi-simultaneous in situ XANES/XRD investigation was carried out to unveil the formation of Ce-MOFs during the solvothermal syntheses in acetonitrile. The crystallization of the two Ce(III)-MOFs presented herein as well as two previously reported Ce(IV)-MOFs, all obtained by a similar synthetic approach, were studied. While the XRD patterns show time-dependent MOF crystallization, the XANES data reveal the presence of Ce(III) intermediates and their subsequent conversion to the MOFs. The addition of acetic acid in combination with the V-shaped linker molecule was identified as the crucial factor for the formation of the crystalline Ce(III/IV)-MOFs.
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Affiliation(s)
- Jonas Gosch
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Virginia Guiotto
- Dipartimento di Chimica, Università degli Studi di Torino, Via Gioacchino Quarello 15a, 10135 Turin, Italy
| | - Felix Steinke
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Erik Svensson Grape
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91 Stockholm, Sweden
| | - Cesare Atzori
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043 Grenoble Cedex 9, France
| | - Kalle Mertin
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Tobias Otto
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Niklas Ruser
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Christoph Meier
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, 24118 Kiel, Germany
| | - Diletta Morelli Venturi
- Dipartimento di Chimica Biologia e Biotecnologia, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - A Ken Inge
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91 Stockholm, Sweden
| | - Kirill A Lomachenko
- European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38043 Grenoble Cedex 9, France
| | - Valentina Crocellà
- Dipartimento di Chimica, Università degli Studi di Torino, Via Gioacchino Quarello 15a, 10135 Turin, Italy
| | - Norbert Stock
- Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 2, 24118 Kiel, Germany
- Kiel Nano, Surface and Interface Science KiNSIS, Christian-Albrechts-Universität zu Kiel, Christian-Albrechts-Platz 4, 24118 Kiel, Germany
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14
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Prates da Costa E, Huang X, Kübel C, Cheng X, Schladitz K, Hofmann A, Göbel U, Smarsly BM. Tuning Mesopore Accessibility of Ce 0.18Zr 0.64Y 0.15La 0.03O 2-δ by Hydrothermal Post-treatment─A Case Study for Ceria-Based Oxidation Storage Materials. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 38011036 DOI: 10.1021/acs.langmuir.3c02067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
The connectivity and thermal stability of pores in heterogeneous, mesoporous metal oxide catalysts are key properties controlling their (long-term) efficacy. In this study, we investigate the influence of pH and temperature during a common hydrothermal aftertreatment step in the synthesis of mesoporous CexZr1-x-y-zYyLazO2-δ oxides obtained from molecular precursors via hydrothermal synthesis. This study has a strong focus on the methodological approach, elucidating whether and how even the smallest changes in morphology and connectivity may be unraveled and related to the underlying chemical processes to uncover key parameters for the ongoing improvement of material properties. Deep insights into the mesopore space were obtained by state-of-the-art physisorption (including hysteresis scanning), electron tomography, and small-angle X-ray scattering (SAXS) analysis. We also provide a simple tool to simulate SAXS curves from electron tomography data that allow direct comparison to experimentally obtained SAXS curves. Furthermore, the impact on surface-bound nitrate groups and the development during calcination were studied in detail by thermogravimetric analysis coupled with mass spectrometry. The key observations indicate a significant increase in thermal stability at temperatures as high as 1050 °C and improved mesopore accessibility with an increase in pH of the aftertreatment solution. The combined observations from the employed methods suggest a pH-dependent removal of surface-bound nitrate groups as well as a dissolution and reprecipitation-based fusing of the primary particles that constitute the mesopore skeleton. This transformation yields a mechanically and thermally stronger mesopore space with the capability to endure high temperatures.
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Affiliation(s)
- Eric Prates da Costa
- Institute of Physical Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, Giessen 35392, Germany
- Umicore AG & Co. KG, Rodenbacher Chaussee 4, Hanau 63457, Germany
| | - Xiaohui Huang
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen 76344, Germany
- Department of Materials and Earth Sciences, Technical University Darmstadt, Alarich-Weiss-Str. 2, Darmstadt 64287, Germany
| | - Christian Kübel
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen 76344, Germany
- Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen 76344, Germany
- Department of Materials and Earth Sciences, Technical University Darmstadt, Alarich-Weiss-Str. 2, Darmstadt 64287, Germany
| | - Xiaoyin Cheng
- Fraunhofer-Institut für Techno-und Wirtschaftsmathematik, Fraunhofer-Platz 1, Kaiserslautern 67663, Germany
| | - Katja Schladitz
- Fraunhofer-Institut für Techno-und Wirtschaftsmathematik, Fraunhofer-Platz 1, Kaiserslautern 67663, Germany
| | | | - Ulrich Göbel
- Umicore AG & Co. KG, Rodenbacher Chaussee 4, Hanau 63457, Germany
| | - Bernd M Smarsly
- Institute of Physical Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 17, Giessen 35392, Germany
- Center for Materials Research, Heinrich-Buff-Ring 16, Giessen 35392, Germany
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15
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Wang L, Li Z, Li J, Chen Y, Zhang K, Han X, Xu G. Changes in mineral fraction and pore morphology of coal with acidification treatment: contribution of clay minerals to methane adsorption. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:114886-114900. [PMID: 37875755 DOI: 10.1007/s11356-023-30414-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Accepted: 10/08/2023] [Indexed: 10/26/2023]
Abstract
The accurate calculation of the contribution which provided by clay minerals in coal on methane adsorption not only bares a significant importance for evaluating the effectiveness of acid stimulation in improving permeability and estimating the coalbed methane reserves but also serves a guide for the governance and utilization of methane resources. In this study, hydrochloric acid (HCl) and hydrofluoric acid (HF) were used to remove specific minerals in Qingdong coal samples. We firstly analyzed the mineral compositions of coal samples with different acidification treatments based on the X-ray diffraction (XRD) experiments, together with analysis of the changes in pore morphology and adsorption capacity. The results showed that acidification did not significantly change the shape of the pores, which remained slit-/plate-like pore. However, the altered adsorption capacity of the coal samples was attributed to changes in pore structure and mineral distribution. Acid erosion of mesopores promoted the transition from mesopores to macropores, contributing to an increase of 8.4% and 24.36% in the percentage of macropores in coal samples treated with HCl and HF, respectively. Fractal dimension D1 grew from 2.2193 to 2.3888 and 2.2572, respectively, but D2 decreased from 2.6146 to 2.5814 and 2.5433, indicating an increment in pore surface roughness and a simplification of the pore structure. The mineral richness of the coal seams should be taken into consideration when applying acid stimulation to increase permeability due to that the acidification products may block the passage of gas migration when the mineral content is slight, which can hinder gas extraction. The aim of this study is to quantitatively determine the contribution rate of clay minerals in coal to methane adsorption with a calculation method is provided by combining pore parameters and limit adsorption capacity, resulting in a contribution rate of 15%.
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Affiliation(s)
- Liang Wang
- National Engineering Research Center for Coal and Gas Control, China University of Mining and Technology, Xuzhou, 221116, China
- Key Laboratory of Gas and Fire Control for Coal Mines, Ministry of Education, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China
- School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China
| | - Ziwei Li
- Key Laboratory of Gas and Fire Control for Coal Mines, Ministry of Education, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China
- School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China
| | - Jing Li
- Key Laboratory of Gas and Fire Control for Coal Mines, Ministry of Education, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China
- School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China
| | - Yinchang Chen
- Key Laboratory of Gas and Fire Control for Coal Mines, Ministry of Education, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China
- School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221116, China
| | - Kaizhong Zhang
- National and Local Joint Engineering Laboratory of Internet Application Technology On Mine, China University of Mining and Technology, Xuzhou, 221116, China.
| | - Xiwei Han
- Shandong Engineering Research Center of Mine Gas Disaster Control, Qingdao, 266404, China
- The First Prospecting Team of Shandong Bureau of Coal Geology, Qingdao, 266404, China
| | - Guangwei Xu
- Shandong Engineering Research Center of Mine Gas Disaster Control, Qingdao, 266404, China
- The First Prospecting Team of Shandong Bureau of Coal Geology, Qingdao, 266404, China
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16
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Salimi S, F Farnia SM, Akhbari K, Tavasoli A. Engineered Catalyst Based on MIL-68(Al) with High Stability for Hydrogenation of Carbon Dioxide and Carbon Monoxide at Low Temperature. Inorg Chem 2023; 62:17588-17601. [PMID: 37856844 DOI: 10.1021/acs.inorgchem.3c01094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2023]
Abstract
Today, the importance of decreasing and converting COx gases from the atmosphere into value-added chemicals by catalytic hydrogenation reactions has become one crucial challenge. In the current work, to facilitate the hydrogenation of COx, several mesoporous alumina catalysts with high efficiency and stability were synthesized using the MIL-68(Al) platform, a nanoporous MOF with a high surface area as a precatalyst, encapsulating nickel or nickel-iron nanoparticles (NPs). After removing the organic linker of MIL-68(Al) by calcination in air, two types of catalysts, promoted and unpromoted, were obtained with various loads of nickel and iron. A set of analyses (PXRD, BET-N2, TEM, FE-SEM, ICP-OES, EDX-map, CO2-TPD, H2-TPR, and H2-TPD) were performed to evaluate the physicochemical properties of catalysts. Based on the analysis results, the promoted catalyst had smaller particles and pores due to the effective and uniform distribution of nickel NPs. Also, H2-TPR and CO2-TPD results in samples containing Fe promoter demonstrated the facilitation of the reduction process and the adsorption and activation of CO2, respectively. The results of CO2 methanation indicated an improved catalytic performance for promoted samples, especially at low temperatures (200-300 °C), compared to unpromoted catalysts. 5Fe·15Ni@Al2O3 MIL-68(Al) catalyst displayed the best performance compared to other catalysts, with a conversion of 92.4% and selectivity of 99.6% at 350 °C and GHSV = 2500 h-1. Moreover, the 5Fe·15Ni@Al2O3 MIL-68(Al) catalyst facilitated the CO2 methanation reaction by reducing the activation energy to 42.5 kJ mol-1 compared with other reported catalysts. Both types of catalysts performed 100% hydrogenation of CO to CH4 with full selectivity at 250 °C and exhibited high stability for at least 100 h at 300 °C. Notably, such high significant catalytic performance is only achieved by the usage of the "MOFs templating strategy" due to the high surface area for the effective distribution of NPs, the strong metal-support interaction, and the formation of nickel aluminate species, preventing the sintering of NPs.
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Affiliation(s)
- Saeideh Salimi
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455 Tehran, Iran
| | - S Morteza F Farnia
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455 Tehran, Iran
| | - Kamran Akhbari
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455 Tehran, Iran
| | - Ahmad Tavasoli
- School of Chemistry, College of Science, University of Tehran, P.O. Box 14155-6455 Tehran, Iran
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17
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Kikkinides ES, Valiullin R. A New Statistical Theory for Constructing Sorption Isotherms in Mesoporous Structures Represented by Bethe Lattices. J Phys Chem A 2023; 127:8734-8750. [PMID: 37793009 DOI: 10.1021/acs.jpca.3c04993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
In the present work, a new statistical theory is developed to describe adsorption and desorption in mesoporous materials (pore sizes ranging from 2 to 50 nm) represented by pore networks in the form of Bethe lattices. The new theory is an extension of a previous theory applied for Statistically Disordered Chain Model (SDCM) structures and incorporates the cooperative effects emerging during phase transitions in pore networks. The theory is validated against simulations and algorithmic models that describe sorption of lattice and real fluids in Bethe lattices. It is seen that the pore network coordination number, or pore connectivity, z, has a significant impact on two important processes observed in pore networks: pore assisting condensation during adsorption and evaporation by percolation during desorption. The inclusion of pore connectivity in the earlier developed framework accounting for cooperativity effects is an important step, rendering the existing models to mimic fluid behavior in real materials more accurately. Hence, the new theory inherently contains all essential elements that may offer the extraction of more reliable pore size distributions utilizing both the adsorption and desorption branches of the isotherm.
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Affiliation(s)
- Eustathios S Kikkinides
- Department of Chemical Engineering, Aristotle University of Thessaloniki, University Campus, Thessaloniki 54124, Greece
| | - Rustem Valiullin
- Faculty of Physics and Earth Sciences, Felix Bloch Institute for Solid State Physics, Linnestr. 5, Leipzig 04103, Germany
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18
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Jeong JS, Kim BJ. Preparation of Cellulose-Based Activated Carbon Fibers with Improved Yield and Their Methylene Chloride Adsorption Evaluation. Molecules 2023; 28:6997. [PMID: 37836838 PMCID: PMC10574768 DOI: 10.3390/molecules28196997] [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: 08/02/2023] [Revised: 10/05/2023] [Accepted: 10/07/2023] [Indexed: 10/15/2023] Open
Abstract
The recent rapid growth of the battery industry has led to a rapid increase in methylene chloride emissions. Methylene chloride causes health and social problems in humans. In this study, cellulose-based activated carbon fibers (CACFs) with improved yield were prepared for the removal of methylene chloride. The concentration of ammonium phosphate in the pretreatment controlled the crosslink density of cellulose fibers and improved the yield. From the results, the specific surface area and total pore volume of cellulose-based activated carbon fibers pretreated with ammonium phosphate (AP-CACFs) were determined to be 1920-2060 m2/g and 0.83-1.02 cm3/g, respectively, and the total yield improved by 6.78-11.59% compared to that of CACFs (4.97%). In particular, a correlation between the textural properties of CACFs and methylene chloride adsorption/desorption behavior was obtained. This correlation can be used to develop efficient adsorbents for methylene chloride removal.
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Affiliation(s)
- Jin-Soo Jeong
- Materials Application Research Institute, Jeonju University, Jeonju 55069, Republic of Korea
- Department of Carbon Convergence, Composite Materials Engineering, Chonbuk National University, Jeonju 54896, Republic of Korea
| | - Byung-Joo Kim
- Materials Application Research Institute, Jeonju University, Jeonju 55069, Republic of Korea
- Department of Advanced Materials, Chemical Engineering, Jeonju University, Jeonju 55069, Republic of Korea
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19
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Tan X, Gerbelli BB, Fantini MCDA, Oliveira CLP, Bordallo HN, Oseliero Filho PL. Retrieving the size distribution of SBA-15 mesopores from small-angle X-ray scattering data using a Monte Carlo method. J Appl Crystallogr 2023; 56:1381-1391. [PMID: 37791357 PMCID: PMC10543675 DOI: 10.1107/s160057672300691x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 08/05/2023] [Indexed: 10/05/2023] Open
Abstract
A Monte Carlo (MC) method was introduced into a state-of-the-art model used to analyse small-angle X-ray scattering (SAXS) data of SBA-15, an ordered mesoporous material with many applications. With this new procedure, referred to herein as the SBA-15+MC model, it is possible to retrieve the size distribution of the mesopores, D(r), in a free modelling approach. To achieve this, two main points were addressed: (i) based on previous implementations, the method was adapted to work with long core-shell cylinders; (ii) since the MC model requires longer processing times, strategies to speed up the calculations were developed, which included a simplified version of the original model used to analyse SAXS data of SBA-15 (referred to as the SBA-15 model) as well as the determination of several structural features from the SAXS curve prior to the fit. The new model was validated with simulated data and later used to fit experimental SAXS curves of SBA-15. The obtained results show that the SBA-15 model only works well because the mesopore size distribution of SBA-15 is narrow, whereas the new approach can be successfully used in cases where D(r) is wider and/or has a more complex profile, such as SBA-15 with expanded mesopores. Even though a specific SAXS example was chosen to prove the model, the strategies presented herein are general and suitable for inclusion in other models aimed at the analysis of SBA-15 and similar ordered mesoporous materials.
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Affiliation(s)
- Xiangyin Tan
- Niels Bohr Institute, Copenhagen University, Denmark
| | | | | | | | - Heloísa Nunes Bordallo
- Niels Bohr Institute, Copenhagen University, Denmark
- European Spallation Source, Lund, Sweden
| | - Pedro Leonidas Oseliero Filho
- Niels Bohr Institute, Copenhagen University, Denmark
- Instituto de Física, Universidade de São Paulo, São Paulo, SP, Brazil
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20
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Zhang W, Wu CM, Li YR. Determination of the surface properties and adsorption states of nanoporous materials using the zeta adsorption isotherm. Phys Chem Chem Phys 2023; 25:22669-22678. [PMID: 37602389 DOI: 10.1039/d3cp02387g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
The adsorption process of porous materials has always been a popular field of research in interfacial physics, and the surface physical parameters of materials can be obtained from their adsorption characteristics, which has a great influence on the performance of materials. Based on the zeta adsorption isotherm, we propose a method based on the zeta adsorption isotherm to predict the entire adsorption process of porous materials and determine material surface properties from the measured isotherm data in the heterogeneity-free range. We applied the zeta constants of the silica adsorption system to the corresponding adsorption isotherm of the porous material. The results showed that the predicted adsorption isotherms are in good agreement with the experimental measurements before pore filling and can effectively identify the pressure ratios at the beginning and end of pore filling. In the region of high-pressure ratios, the Kelvin equation was utilized to calculate the pressure ratio at a contact angle of 0°. The surface parameters of the materials were determined by geometrically calculating the variation of the adsorption amount and the desorption isotherms in the high-pressure ratio range were calculated from these surface parameters. The predicted desorption isotherms can well reflect the adsorption process of silica porous materials in the region of a high-pressure ratio. In addition, for the surface parameters of the materials, the specific surface area calculated from the adsorption and desorption isotherms, respectively, differed by less than 7.9%, and the reliability of the method was verified by comparing the results with those of the argon adsorption systems.
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Affiliation(s)
- Wei Zhang
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China.
| | - Chun-Mei Wu
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China.
| | - You-Rong Li
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China.
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21
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Phan MV, Tran TKT, Pham QN, Do MH, Nguyen THN, Nguyen MT, Phan TT, To TXH. Controllable Synthesis of Hollow Silica Nanoparticles Using Layered Double Hydroxide Templates and Application for Thermal Insulation Coating. ACS OMEGA 2023; 8:31399-31409. [PMID: 37663482 PMCID: PMC10468985 DOI: 10.1021/acsomega.3c03917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 08/03/2023] [Indexed: 09/05/2023]
Abstract
The innovative hollow silica nanoparticle (HSN) material possesses substantial potential for application in the insulation field. The size and shell thickness of HSN are crucial factors in determining their inherent properties, which, in turn, impact their applicability. This research presents a facile approach to synthesizing HSN in which sodium silicate (Na2SiO3) was utilized as the silica precursor that can be directly deposited onto layered double hydroxide (LDH) nanoparticles without the utilization of any surfactant. A subsequent acid treatment was used to eliminate the templates, resulting in the formation of an HSN devoid of mesopores in silica shells. By utilizing various sizes of LDH cores, obtainable via coprecipitation followed by hydrothermal treatment, we were capable of successfully synthesizing the hollow particles with adjustable diameters ranging from 50 to 200 nm. In addition, the shell thickness is varied from 6.8 to 22.5 nm by varying the silicate solution concentration. Results demonstrate that prepared HSNs have low thermal conductivity and high reflectance in the UV-vis-NIR range (averaging 82.1%). These findings suggest that HSN can be utilized as an effective inorganic filler in the formulation of reflective and thermally insulating coatings.
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Affiliation(s)
- Minh Vuong Phan
- Institute
of Chemical Technology, Vietnam Academy
of Science and Technology, Ho Chi Minh City 700000, Vietnam
- Graduate
University of Science and Technology, Vietnam
Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Thi Kim Thoa Tran
- Institute
of Chemical Technology, Vietnam Academy
of Science and Technology, Ho Chi Minh City 700000, Vietnam
- Graduate
University of Science and Technology, Vietnam
Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Quynh Nhu Pham
- Institute
of Chemical Technology, Vietnam Academy
of Science and Technology, Ho Chi Minh City 700000, Vietnam
| | - Manh Huy Do
- Institute
of Chemical Technology, Vietnam Academy
of Science and Technology, Ho Chi Minh City 700000, Vietnam
| | - Thi Hong No Nguyen
- Institute
of Chemical Technology, Vietnam Academy
of Science and Technology, Ho Chi Minh City 700000, Vietnam
- Graduate
University of Science and Technology, Vietnam
Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Minh Ty Nguyen
- Institute
of Chemical Technology, Vietnam Academy
of Science and Technology, Ho Chi Minh City 700000, Vietnam
| | - Thanh Thao Phan
- Institute
of Chemical Technology, Vietnam Academy
of Science and Technology, Ho Chi Minh City 700000, Vietnam
- Graduate
University of Science and Technology, Vietnam
Academy of Science and Technology, Hanoi 100000, Vietnam
| | - Thi Xuan Hang To
- Institute
for Tropical Technology, Vietnam Academy
of Science and Technology, Hanoi 100000, Vietnam
- Graduate
University of Science and Technology, Vietnam
Academy of Science and Technology, Hanoi 100000, Vietnam
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22
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Ajumobi O, Wang B, Farinmade A, He J, Valla JA, John VT. Design of Nanostraws in Amine-Functionalized MCM-41 for Improved Adsorption Capacity in Carbon Capture. ENERGY & FUELS : AN AMERICAN CHEMICAL SOCIETY JOURNAL 2023; 37:12079-12088. [PMID: 37609064 PMCID: PMC10441579 DOI: 10.1021/acs.energyfuels.3c01318] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Revised: 06/29/2023] [Indexed: 08/24/2023]
Abstract
Polymeric amine encapsulation in high surface area MCM-41 particles for CO2 capture is well established but has the drawback of leaching out the water-soluble polymer upon exposure to aqueous environments. Alternatively, chemical (covalent) grafting amine functional groups from an alkoxysilane such as 3-aminopropyltriethoxysilane (APTES) on MCM-41 offer better stability against this drawback. However, the diffusional restriction exhibited by the narrow uniform MCM-41 pores (2-4 nm) may impede amine functionalization of the available silanol groups within the inner mesoporous core. This leads to incomplete amine functionalization and could reduce the CO2 adsorption capacity in such materials. Our concept to improve access to the MCM-41 interior is based on the incorporation of nanostraws with larger inner diameter (15-30 nm) to create a hierarchical porosity and enhance the molecular transport of APTES. Halloysite nanotubes (HNT) are used as tubular straws that are integrated into the MCM-41 matrix using an aerosol-assisted synthesis method. Characterization results show that the intrinsic structure of MCM-41 remains unaltered after the incorporation of the nanostraws and amine functionalization. At an optimal APTES loading of 0.5 g (X = 2.0), the amine-functionalized composite of MCM-41 with straws (APTES/M40H) has a 20% higher adsorption capacity than the amine-modified MCM-41 (APTES/MCM-41) adsorbent. Furthermore, the CO2 adsorption capacity APTES/M40H doubles that of APTES/MCM-41 when normalized based on the composition of MCM-41 in the composite particle with straws. The facile integration of nanostraws in MCM-41 leading to hierarchical porosities could be effective toward the mitigation of diffusional restriction in porous materials with potential for other catalytic and adsorption technologies.
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Affiliation(s)
- Oluwole Ajumobi
- Department
of Chemical & Biomolecular Engineering, Tulane University, 6823 St. Charles Avenue, New Orleans, Louisiana 70118, United States
| | - Borui Wang
- Department
of Chemical & Biomolecular Engineering, Tulane University, 6823 St. Charles Avenue, New Orleans, Louisiana 70118, United States
| | - Azeem Farinmade
- Department
of Chemical & Biomolecular Engineering, Tulane University, 6823 St. Charles Avenue, New Orleans, Louisiana 70118, United States
| | - Jibao He
- Coordinated
Instrumentation Facility, Tulane University, 6823 St. Charles Avenue, New Orleans, Louisiana 70118, United States
| | - Julia A. Valla
- Department
of Chemical & Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Vijay T. John
- Department
of Chemical & Biomolecular Engineering, Tulane University, 6823 St. Charles Avenue, New Orleans, Louisiana 70118, United States
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23
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Matos J, Amézquita-Marroquín CP, Lozano JD, Zapata-Rivera J, Giraldo L, Poon PS, Moreno-Piraján JC. Experimental and Theoretical Estimations of Atrazine's Adsorption in Mangosteen-Peel-Derived Nanoporous Carbons. Molecules 2023; 28:5268. [PMID: 37446931 PMCID: PMC10343179 DOI: 10.3390/molecules28135268] [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: 06/10/2023] [Revised: 07/02/2023] [Accepted: 07/05/2023] [Indexed: 07/15/2023] Open
Abstract
Nanoporous carbons were prepared via chemical and physical activation from mangosteen-peel-derived chars. The removal of atrazine was studied due to the bifunctionality of the N groups. Pseudo-first-order, pseudo-second-order, and intraparticle pore diffusion kinetic models were analyzed. Adsorption isotherms were also analyzed according to the Langmuir and Freundlich models. The obtained results were compared against two commercially activated carbons with comparable surface chemistry and porosimetry. The highest uptake was found for carbons with higher content of basic surface groups. The role of the oxygen-containing groups in the removal of atrazine was estimated experimentally using the surface density. The results were compared with the adsorption energy of atrazine theoretically estimated on pristine and functionalized graphene with different oxygen groups using periodic DFT methods. The energy of adsorption followed the same trend observed experimentally, namely the more basic the pH, the more favored the adsorption of atrazine. Micropores played an important role in the uptake of atrazine at low concentrations, but the presence of mesoporous was also required to inhibit the pore mass diffusion limitations. The present work contributes to the understanding of the interactions between triazine-based pollutants and the surface functional groups on nanoporous carbons in the liquid-solid interface.
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Affiliation(s)
- Juan Matos
- Instituto de Ciencias Aplicadas, Facultad de Ingeniería, Universidad Autónoma de Chile, Santiago 8900000, Chile
| | - Claudia P. Amézquita-Marroquín
- Escuela de Ingeniería de los Recursos Naturales y del Ambiente, Facultad de Ingeniería, Universidad del Valle, Calle 13 100-00, Cali 760035, Colombia;
- Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Carrera Primera 18A-12, Bogotá 111711, Colombia; (J.D.L.); (J.Z.-R.)
| | - Johan D. Lozano
- Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Carrera Primera 18A-12, Bogotá 111711, Colombia; (J.D.L.); (J.Z.-R.)
| | - Jhon Zapata-Rivera
- Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Carrera Primera 18A-12, Bogotá 111711, Colombia; (J.D.L.); (J.Z.-R.)
| | - Liliana Giraldo
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Carrera 45, Bogotá 111231, Colombia;
| | - Po S. Poon
- Unidad de Desarrollo Tecnológico (UDT), Universidad de Concepción, Barrio Universitario s/n, Concepción 4191996, Chile;
| | - Juan C. Moreno-Piraján
- Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Carrera Primera 18A-12, Bogotá 111711, Colombia; (J.D.L.); (J.Z.-R.)
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24
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HUSSEIN DR, ABBAS KK, AL-GHABAN AMA. Synthesizinge a novel Zr2Al-GNS MAX phase ceramic with superior electrical properties using pressureless sintering technique. Turk J Chem 2023; 47:763-781. [PMID: 38174058 PMCID: PMC10760547 DOI: 10.55730/1300-0527.3577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 08/25/2023] [Accepted: 07/04/2023] [Indexed: 01/05/2024] Open
Abstract
A unique Zr2Al-GNS MAX phase ceramic supported nanographene sheet was prepared using a cost-effective pressureless sintering technique under relatively low temperature. An experimental investigation was conducted to explore the lattice parameters using different temperatures, such as 1000, 1150, and 1300 °C. To characterize the crystal structure of the MAX phase ceramic, X-ray diffraction, field emission scanning electron microscopy imaging, energy-dispersive X-ray spectroscopy (EDX), high-resolution transmission electron microscopy (HRTEM), and selected area diffraction (SAED) were utilized. The results revealed that the pressureless sintering technique was successfully utilized to synthesize the Zr2Al-GNS MAX phase ceramic under 1150 °C with a low impurity ratio of secondary phases such as Zr3AL2, Zr3AL5, and ZrC components. The high percentage of the Zr2Al-GNS MAX phase ceramic was obtained at 49.0% at 1150 °C compared with different temperatures. The BET surface area (SBET), pore volume, and pore size were also investigated. The SBET of the prepared Zr2Al-GNS MAX phase was increased to 30% using graphene nanosheet, while the porosity was highly decreased to 8% from its original value. The electrical properties were also studied in this research for potential applications, such as the absolute value of impedance (Z), absolute value of admittance (Y), induction (L), capacitance (C), resistance (R), conductance (G), susceptibility (B), and phase angle (ϴ). It was found that the capacitance and the phase angle were improved using the prepared Zr2Al-GNS MAX phase ceramic, depending on the frequencies. The results presented here may facilitate the improvements in the features of the MAX phase type of Zr2Al-GNS-enhanced one-layer nanographene sheet for electrical applications ceramic.
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Affiliation(s)
- Dumooa R. HUSSEIN
- Department of Materials Engineering, University of Technology, P.O. Box 19006, Baghdad,
Iraq
| | - Khalid K. ABBAS
- Department of Materials Engineering, University of Technology, P.O. Box 19006, Baghdad,
Iraq
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25
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Stahlfeld KW, Belmont EL. BET and Kelvin Analyses by Thermogravimetric Desorption. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37294886 DOI: 10.1021/acs.langmuir.3c00854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Porous solids with nanometer-sized pores and large surface areas are a highly important class of materials. Uses of such materials include filtration, batteries, catalysts, and carbon sequestration. These porous solids are characterized by their surface areas, typically >100 m2/g, and pore size distributions. These parameters are typically measured using cryogenic physisorption, frequently referred to as Brunauer-Emmett-Teller (BET) analysis when BET theory is applied to interpret experimental results. Cryogenic physisorption and related analysis elucidate how a particular solid interacts with the cryogenic adsorbate, but this can be a poor predictor of how that solid will interact with other adsorbates, limiting the applicability of the results. Additionally, the cryogenic temperatures and deep vacuum required for cryogenic physisorption can cause kinetic limitations and experimental difficulties. This method nevertheless remains the standard technique to characterize porous materials for a wide variety of applications due to limited other options. In this work, a thermogravimetric desorption technique for determining surface areas and pore size distributions of porous solids available to adsorbates having boiling points above ambient temperature at ambient pressure is presented. A thermogravimetric analyzer (TGA) is used to measure temperature-dependent adsorbate mass loss, and isotherms are derived. For systems that exhibit multilayer formation, BET theory is applied to isotherms to derive specific surface areas. For systems that do not exhibit multilayer formation, the Kelvin equation is applied to determine pore size distributions and surface areas for the porous materials. In this study, the thermogravimetric method is applied to four adsorbents and two adsorbates─water and toluene─and results are compared to cryogenic physisorption results.
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Affiliation(s)
- Kurt W Stahlfeld
- Department of Mechanical Engineering, The University of Wyoming, Laramie, Wyoming 82071, United States
| | - Erica L Belmont
- Department of Mechanical Engineering, The University of Wyoming, Laramie, Wyoming 82071, United States
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26
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Ma Y, Kang Z, Lei X, Chen X, Gou C, Kang Z, Wang S. Coupling effect of critical properties shift and capillary pressure on confined fluids: A simulation study in tight reservoirs. Heliyon 2023; 9:e15675. [PMID: 37215859 PMCID: PMC10195854 DOI: 10.1016/j.heliyon.2023.e15675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 04/08/2023] [Accepted: 04/18/2023] [Indexed: 05/24/2023] Open
Abstract
Critical properties shift and large capillary pressure are important contributors for the phase behavior altering of nanopore fluid. However, the effects of critical properties shift and large capillary pressure on the phase behavior are ignored in traditional compositional simulators, leading to inaccurate evaluation results of tight reservoirs. In this study, phase behavior and production of confined fluid in nanopores are studied. First, we developed a method for coupling the effect of critical properties shift and capillary pressure into the vapor-liquid equilibrium calculation base on Peng-Robinson equation of state. Second, a novel fully compositional numerical simulation algorithm considering effect of critical properties shift and capillary pressure on phase behavior is accomplished. Third, we have discussed the alterations of critical properties shift effect, capillary pressure effect and coupling effect on the composition of oil and gas production in detail. The critical properties shift and capillary pressure effects on oil and gas production in tight reservoirs are analyzed quantitatively through four cases, and the influences of the two effects in oil/gas production are compared. Based on the fully compositional numerical simulation, the simulator can rigorously simulate the impacts of component changes during production. The simulation results show that both the critical properties shift effect and the capillary pressure effect reduce the bubble point pressure of Changqing shale oil, and the influence are more prevalent in pores of smaller radius. In pores is larger than 50 nm, the phase behavior altering of the fluid can be ignored. In addition, we devised four cases to comprehensively investigate the effects of critical properties shift and large capillary pressure on production performance of tight reservoirs. The comparisons between the four cases show that the capillary pressure effect impacts the reservoir production performances greater than the critical properties shift effect, such as higher oil production, higher GOR, and lower content of lighter component and higher content of heavier component in the residual oil/gas. The results of coupling effects indicate that the critical properties shift effect would suppress the effect of the capillary pressure effect. In particular, the difference between the simulation results of the coupling effects and the base case is smaller than that between the simulation results of the capillary pressure effect and the base case.
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Affiliation(s)
- Yuhua Ma
- School of Energy Resources, China University of Geosciences, Beijing, 100083, China
| | - Zhihong Kang
- School of Energy Resources, China University of Geosciences, Beijing, 100083, China
| | - Xin Lei
- School of Energy Resources, China University of Geosciences, Beijing, 100083, China
| | - Xiaodong Chen
- Research Institute of Exploration and Development of Changqing Oilfield, PetroChina, Xi'an, 710000, Shaanxi Province, China
| | - Congbo Gou
- Research Institute of Exploration and Development of Changqing Oilfield, PetroChina, Xi'an, 710000, Shaanxi Province, China
- Nation Engineering Laboratory for Exploration and Development of Low Permeability Oil and Gas Field, Xi'an, 710000, Shaanxi Province, China
| | - Zhijiang Kang
- Sinopec Petroleum Exploration and Development Research Institute, Beijing, 100083, China
| | - Shuoliang Wang
- School of Energy Resources, China University of Geosciences, Beijing, 100083, China
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27
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Lu Y, Li MC, Lee J, Liu C, Mei C. Microplastic remediation technologies in water and wastewater treatment processes: Current status and future perspectives. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 868:161618. [PMID: 36649776 DOI: 10.1016/j.scitotenv.2023.161618] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 01/06/2023] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
Microplastics (MPs) are a type of contaminants produced during the use and disposal of plastic products, which are ubiquitous in our lives. With the high specific surface area and strong hydrophobicity, MPs can adsorb various hazardous microorganisms and chemical contaminants from the environment, causing irreversible damage to our humans. It is reported that the MPs have been detected in infant feces and human blood. Therefore, the presence of MPs has posed a significant threat to human health. It is critically essential to develop efficient, scalable and environmentally-friendly methods to remove MPs. Herein, recent advances in the MPs remediation technologies in water and wastewater treatment processes are overviewed. Several approaches, including membrane filtration, adsorption, chemically induced coagulation-flocculation-sedimentation, bioremediation, and advanced oxidation processes are systematically documented. The characteristics, mechanisms, advantages, and disadvantages of these methods are well discussed and highlighted. Finally, the current challenges and future trends of these methods are proposed, with the aim of facilitating the remediation of MPs in water and wastewater treatment processes in a more efficient, scalable, and environmentally-friendly way.
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Affiliation(s)
- Yang Lu
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Mei-Chun Li
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China.
| | - Juhyeon Lee
- College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, China
| | - Chaozheng Liu
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Changtong Mei
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
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28
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Guo Y, Zhao L, Bi M, Zhang B, Guo K, Miao L, Cai C, Chen L, Shi X, Cheng W. Molecular volume-controlled shape-selective catalysis for synthesis of cinnamate over microporous zeolites. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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29
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Yildirim O, Tsaturyan A, Damin A, Nejrotti S, Crocellà V, Gallo A, Chierotti MR, Bonomo M, Barolo C. Quinoid-Thiophene-Based Covalent Organic Polymers for High Iodine Uptake: When Rational Chemical Design Counterbalances the Low Surface Area and Pore Volume. ACS APPLIED MATERIALS & INTERFACES 2023; 15:15819-15831. [PMID: 36926827 PMCID: PMC10064318 DOI: 10.1021/acsami.2c20853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
A novel 2D covalent organic polymer (COP), based on conjugated quinoid-oligothiophene (QOT) and tris(aminophenyl) benzene (TAPB) moieties, is designed and synthesized (TAPB-QOT COP). Some DFT calculations are made to clarify the equilibrium between different QOT isomers and how they could affect the COP formation. Once synthetized, the polymer has been thoroughly characterized by spectroscopic (i.e., Raman, UV-vis), SSNMR and surface (e.g., SEM, BET) techniques, showing a modest surface area (113 m2 g-1) and micropore volume (0.014 cm3 g-1 with an averaged pore size of 5.6-8 Å). Notwithstanding this, TAPB-QOT COP shows a remarkably high iodine (I2) uptake capacity (464 %wt) comparable to or even higher than state-of-the-art porous organic polymers (POPs). These auspicious values are due to the thoughtful design of the polymer with embedded sulfur sites and a conjugated scaffold with the ability to counterbalance the relatively low pore volumes. Indeed, both morphological and Raman data, supported by computational analyses, prove the very high affinity between the S atom in our COP and the I2. As a result, TAPB-QOT COP shows the highest volumetric I2 uptake (i.e., the amount of I2 uptaken per volume unit) up to 331 g cm-3 coupled with a remarkably high reversibility (>80% after five cycles).
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Affiliation(s)
- Onur Yildirim
- Department
of Chemistry and NIS Interdepartmental Centre, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy
| | - Arshak Tsaturyan
- Department
of Chemistry and NIS Interdepartmental Centre, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy
- Institute
of Physical and Organic Chemistry, Southern
Federal University, 344006 Rostov-on-Don, Russia
- Université
Jean Monnet Saint-Etienne, CNRS, Institut d’Optique Graduate
School, Laboratoire Hubert Curien UMR 5516, F-42023 Saintt-Etienne, France
| | - Alessandro Damin
- Department
of Chemistry and NIS Interdepartmental Centre, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy
- INSTM
Reference Centre, Università degli
Studi di Torino, Via
Gioacchino Quarello 15/a, 10125 Torino, Italy
| | - Stefano Nejrotti
- Department
of Chemistry and NIS Interdepartmental Centre, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy
- INSTM
Reference Centre, Università degli
Studi di Torino, Via
Gioacchino Quarello 15/a, 10125 Torino, Italy
| | - Valentina Crocellà
- Department
of Chemistry and NIS Interdepartmental Centre, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy
- INSTM
Reference Centre, Università degli
Studi di Torino, Via
Gioacchino Quarello 15/a, 10125 Torino, Italy
| | - Angelo Gallo
- Department
of Chemistry and NIS Interdepartmental Centre, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy
| | - Michele Remo Chierotti
- Department
of Chemistry and NIS Interdepartmental Centre, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy
- INSTM
Reference Centre, Università degli
Studi di Torino, Via
Gioacchino Quarello 15/a, 10125 Torino, Italy
| | - Matteo Bonomo
- Department
of Chemistry and NIS Interdepartmental Centre, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy
- INSTM
Reference Centre, Università degli
Studi di Torino, Via
Gioacchino Quarello 15/a, 10125 Torino, Italy
| | - Claudia Barolo
- Department
of Chemistry and NIS Interdepartmental Centre, University of Turin, Via Pietro Giuria 7, 10125 Torino, Italy
- INSTM
Reference Centre, Università degli
Studi di Torino, Via
Gioacchino Quarello 15/a, 10125 Torino, Italy
- ICxT
Interdepartmental Centre, Università
degli Studi di Torino, Via Lungo Dora Siena 100, 10153 Torino, Italy
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30
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Park B, Choi SJ. Magnetic biochar modified with crosslinked chitosan and EDTA for removing cobalt from aqueous solutions. J Radioanal Nucl Chem 2023. [DOI: 10.1007/s10967-023-08831-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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31
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Multia J, Kravchenko DE, Rubio-Giménez V, Philip A, Ameloot R, Karppinen M. Nanoporous Metal-Organic Framework Thin Films Prepared Directly from Gaseous Precursors by Atomic and Molecular Layer Deposition: Implications for Microelectronics. ACS APPLIED NANO MATERIALS 2023; 6:827-831. [PMID: 36743856 PMCID: PMC9887593 DOI: 10.1021/acsanm.2c04934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Accepted: 01/05/2023] [Indexed: 06/18/2023]
Abstract
Atomic/molecular layer deposition (ALD/MLD) allows for the direct gas-phase synthesis of crystalline metal-organic framework (MOF) thin films. Here, we show for the first time using krypton and methanol physisorption measurements that ALD/MLD-fabricated copper 1,4-benzenedicarboxylate (Cu-BDC) ultrathin films possess accessible porosity matching that of the corresponding bulk MOF.
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Affiliation(s)
- Jenna Multia
- Department
of Chemistry and Materials Science, Aalto
University, Aalto FI-00076, Finland
| | - Dmitry E. Kravchenko
- Centre
for Membrane Separations, Adsorption, Catalysis and Spectroscopy, Katholieke Universiteit Leuven, Leuven 3001, Belgium
| | - Víctor Rubio-Giménez
- Centre
for Membrane Separations, Adsorption, Catalysis and Spectroscopy, Katholieke Universiteit Leuven, Leuven 3001, Belgium
| | - Anish Philip
- Department
of Chemistry and Materials Science, Aalto
University, Aalto FI-00076, Finland
| | - Rob Ameloot
- Centre
for Membrane Separations, Adsorption, Catalysis and Spectroscopy, Katholieke Universiteit Leuven, Leuven 3001, Belgium
| | - Maarit Karppinen
- Department
of Chemistry and Materials Science, Aalto
University, Aalto FI-00076, Finland
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Frías-Ureña PM, Bárcena-Soto M, Orozco-Guareño E, Gutiérrez-Becerra A, Mota-Morales JD, Chavez K, Soto V, Rivera-Mayorga JA, Escalante-Vazquez JI, Gómez-Salazar S. Porous Structural Properties of K or Na-Co Hexacyanoferrates as Efficient Materials for CO 2 Capture. MATERIALS (BASEL, SWITZERLAND) 2023; 16:608. [PMID: 36676342 PMCID: PMC9863694 DOI: 10.3390/ma16020608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Revised: 12/23/2022] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
The stoichiometry of the components of hexacyanoferrate materials affecting their final porosity properties and applications in CO2 capture is an issue that is rarely studied. In this work, the effect that stoichiometry of all element components and oxidation states of transition metals has on the structures of mesoporous K or Na-cobalt hexacyanoferrates (CoHCFs) and CO2 removal is reported. A series of CoHCFs model systems are synthesized using the co-precipitation method with varying amounts of Co ions. CoHCFs are characterized by N2 adsorption, TGA, FTIR-ATR, XRD, and XPS. N2 adsorption results reveal a more developed external surface area (72.69-172.18 m2/g) generated in samples containing mixtures of K+/Fe2+/Fe3+ ions (system III) compared to samples with Na+/Fe2+ ions (systems I, II). TGA results show that the porous structure of CoHCFs is affected by Fe and Co ions oxidation states, the number of water molecules, and alkali ions. The formation of two crystalline cells (FCC and triclinic) is confirmed by XRD results. Fe and Co oxidation states are authenticated by XPS and allow for the confirmation of charges involved in the stabilization of CoCHFs. CO2 removal capacities (3.04 mmol/g) are comparable with other materials reported. CO2 adsorption kinetics is fast (3-6 s), making CoHCFs attractive for continuous operations. Qst (24.3 kJ/mol) reveals a physical adsorption process. Regeneration effectiveness for adsorption/desorption cycles indicates ~1.6% loss and selectivity (~47) for gas mixtures (CO2:N2 = 15:85). The results of this study demonstrate that the CoHCFs have practical implications in the potential use of CO2 capture and flue gas separations.
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Affiliation(s)
- Paloma M. Frías-Ureña
- Departamento de Química, Universidad de Guadalajara (CUCEI), Boulevard Marcelino García Barragán #1421, Esquina Calzada Olímpica, Guadalajara 44430, Mexico
| | - Maximiliano Bárcena-Soto
- Departamento de Química, Universidad de Guadalajara (CUCEI), Boulevard Marcelino García Barragán #1421, Esquina Calzada Olímpica, Guadalajara 44430, Mexico
| | - Eulogio Orozco-Guareño
- Departamento de Química, Universidad de Guadalajara (CUCEI), Boulevard Marcelino García Barragán #1421, Esquina Calzada Olímpica, Guadalajara 44430, Mexico
| | - Alberto Gutiérrez-Becerra
- Departamento de Ciencias Básicas y Aplicadas, Universidad de Guadalajara (CUTonala), Avenue Nuevo Periférico 555, Tonalá 45425, Mexico
| | - Josué D. Mota-Morales
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de Mexico, Querétaro 76230, Mexico
| | - Karina Chavez
- Departamento de Química, Universidad de Guadalajara (CUCEI), Boulevard Marcelino García Barragán #1421, Esquina Calzada Olímpica, Guadalajara 44430, Mexico
| | - Víctor Soto
- Departamento de Química, Universidad de Guadalajara (CUCEI), Boulevard Marcelino García Barragán #1421, Esquina Calzada Olímpica, Guadalajara 44430, Mexico
- Graduate Program in Materials Science, Departamento de Ingeniería de Proyectos, Universidad de Guadalajara (CUCEI), Boulevard Marcelino García Barragán #1421, Esquina Calzada Olímpica, Guadalajara 44430, Mexico
| | - José A. Rivera-Mayorga
- Departamento de Química, Universidad de Guadalajara (CUCEI), Boulevard Marcelino García Barragán #1421, Esquina Calzada Olímpica, Guadalajara 44430, Mexico
| | - José I. Escalante-Vazquez
- Departamento de Química, Universidad de Guadalajara (CUCEI), Boulevard Marcelino García Barragán #1421, Esquina Calzada Olímpica, Guadalajara 44430, Mexico
| | - Sergio Gómez-Salazar
- Departamento de Ingeniería Química, Universidad de Guadalajara (CUCEI), Boulevard Marcelino García Barragán #1421, Esquina Calzada Olímpica, Guadalajara 44430, Mexico
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33
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Cavallo M, Dosa M, Porcaro NG, Bonino F, Piumetti M, Crocellà V. Shaped natural and synthetic zeolites for CO2 capture in a wide temperature range. J CO2 UTIL 2023. [DOI: 10.1016/j.jcou.2022.102335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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34
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Zelenka T, Horikawa T, Do DD. Artifacts and misinterpretations in gas physisorption measurements and characterization of porous solids. Adv Colloid Interface Sci 2023; 311:102831. [PMID: 36586219 DOI: 10.1016/j.cis.2022.102831] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 12/20/2022] [Accepted: 12/23/2022] [Indexed: 12/27/2022]
Abstract
This contribution provides a critical review of gas physisorption in the textural characterization of porous solids, with the focus on the artifacts in experimental data that lead to serious misinterpretation of the results derived from the analysis of adsorption isotherms. Apart from the problems related to the determination and interpretation of the BET area, we paid particular attention to the issues associated with the determination of pore size distribution; for example, the choice of the correct branch of the hysteresis loop and the network effects. Pitfalls in the analyses using either the classical macroscopic or the advanced microscopic (DFT, GCMC) methodology are addressed. The ultimate aim is to provide guidance for proper calculations and correct interpretation of physisorption data.
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Affiliation(s)
- Tomáš Zelenka
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. dubna 22, 70103 Ostrava, Czech Republic.
| | - Toshihide Horikawa
- Graduate School of Technology, Industrial and Social Sciences, University of Tokushima, 2-1, Minamijosanjima, Tokushima 770-8506, Japan.
| | - D D Do
- School of Chemical Engineering, University of Queensland, St. Lucia, QLD, 4072, Australia.
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Reichinger D, Reithofer M, Hohagen M, Drinic M, Tobias J, Wiedermann U, Kleitz F, Jahn-Schmid B, Becker CFW. A Biomimetic, Silaffin R5-Based Antigen Delivery Platform. Pharmaceutics 2022; 15:pharmaceutics15010121. [PMID: 36678751 PMCID: PMC9866965 DOI: 10.3390/pharmaceutics15010121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/22/2022] [Accepted: 12/24/2022] [Indexed: 01/01/2023] Open
Abstract
Nature offers a wide range of evolutionary optimized materials that combine unique properties with intrinsic biocompatibility and that can be exploited as biomimetic materials. The R5 and RRIL peptides employed here are derived from silaffin proteins that play a crucial role in the biomineralization of marine diatom silica shells and are also able to form silica materials in vitro. Here, we demonstrate the application of biomimetic silica particles as a vaccine delivery and adjuvant platform by linking the precipitating peptides R5 and the RRIL motif to a variety of peptide antigens. The resulting antigen-loaded silica particles combine the advantages of biomaterial-based vaccines with the proven intracellular uptake of silica particles. These particles induce NETosis in human neutrophils as well as IL-6 and TNF-α secretion in murine bone marrow-derived dendritic cells.
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Affiliation(s)
- Daniela Reichinger
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
| | - Manuel Reithofer
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
- Institute of Molecular Biotechnology, Department of Biotechnology, University of Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Vienna, Austria
| | - Mariam Hohagen
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
- Department of Inorganic Chemistry–Functional Materials, Faculty of Chemistry, University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
| | - Mirjana Drinic
- Institute of Specific Prophylaxis and Tropical Medicine, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria
| | - Joshua Tobias
- Institute of Specific Prophylaxis and Tropical Medicine, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria
| | - Ursula Wiedermann
- Institute of Specific Prophylaxis and Tropical Medicine, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria
| | - Freddy Kleitz
- Department of Inorganic Chemistry–Functional Materials, Faculty of Chemistry, University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
| | - Beatrice Jahn-Schmid
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - Christian F. W. Becker
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria
- Correspondence:
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36
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Huang N, Su T, Qin Z, Ji H. Nickel Supported on Multilayer Vanadium Carbide for Dry Reforming of Methane. ChemistrySelect 2022. [DOI: 10.1002/slct.202203873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Nongfeng Huang
- School of Chemistry and Chemical Engineering Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology Guangxi University 100 Daxue Road Nanning 530004 P. R. China
| | - Tongming Su
- School of Chemistry and Chemical Engineering Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology Guangxi University 100 Daxue Road Nanning 530004 P. R. China
| | - Zuzeng Qin
- School of Chemistry and Chemical Engineering Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology Guangxi University 100 Daxue Road Nanning 530004 P. R. China
| | - Hongbing Ji
- Fine Chemical Institute Sun Yat-sen University 135 Xingangxi Road Guangzhou 510275 P. R. China
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Kinnertová E, Slovák V, Zelenka T, Vaulot C, Delmotte L. Carbonaceous Materials Porosity Investigation in a Wet State by Low-Field NMR Relaxometry. MATERIALS (BASEL, SWITZERLAND) 2022; 15:9021. [PMID: 36556827 PMCID: PMC9788483 DOI: 10.3390/ma15249021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/09/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023]
Abstract
The porosity of differently wetted carbonaceous material with disordered mesoporosity was investigated using low-field 1H NMR relaxometry. Spin−spin relaxation (relaxation time T2) was measured using the CPMG pulse sequence. We present a non-linear optimization method for the conversion of relaxation curves to the distribution of relaxation times by using non-specialized software. Our procedure consists of searching for the number of components, relaxation times, and their amplitudes, related to different types of hydrogen nuclei in the sample wetted with different amounts of water (different water-to-carbon ratio). We found that a maximum of five components with different relaxation times was sufficient to describe the observed relaxation. The individual components were attributed to a tightly bounded surface water layer (T2 up to 2 ms), water in small pores especially supermicropores (2 < T2 < 7 ms), mesopores (7 < T2 < 20 ms), water in large cavities between particles (20−1500 ms), and bulk water surrounding the materials (T2 > 1500 ms). To recalculate the distribution of relaxation times to the pore size distribution, we calculated the surface relaxivity based on the results provided by additional characterization techniques, such as thermoporometry (TPM) and N2/−196 °C physisorption.
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Affiliation(s)
- Eva Kinnertová
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. Dubna 22, 701 03 Ostrava, Czech Republic
| | - Václav Slovák
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. Dubna 22, 701 03 Ostrava, Czech Republic
| | - Tomáš Zelenka
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. Dubna 22, 701 03 Ostrava, Czech Republic
| | - Cyril Vaulot
- Institut de Science des Matériaux de Mulhouse (IS2M), CNRS UMR 7361, Université de Haute-Alsace, 15 Rue Jean Starcky, 68057 Mulhouse, France
| | - Luc Delmotte
- Institut de Science des Matériaux de Mulhouse (IS2M), CNRS UMR 7361, Université de Haute-Alsace, 15 Rue Jean Starcky, 68057 Mulhouse, France
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38
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Numpilai T, Donphai W, Du Z, Cheng CK, Charoenchaitrakool M, Chareonpanich M, Witoon T. Fe 2O 3-decorated hollow porous silica spheres assisted by waste gelatin template for efficient purification of synthetic wastewater containing As(V). CHEMOSPHERE 2022; 308:136356. [PMID: 36087737 DOI: 10.1016/j.chemosphere.2022.136356] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/19/2022] [Accepted: 09/02/2022] [Indexed: 06/15/2023]
Abstract
Purification of As(V)-contaminated water through adsorption by Fe2O3-based materials is a promising technology due to its low-cost and high efficiency. Dispersing the Fe2O3 phase on silica supports can improve both the adsorption rate and capacity due to the reduction in Fe2O3 particle sizes and the prevention of clumping of the Fe2O3 particles. However, the clusters in conventional silica materials largely impede the diffusion of As(V) to reach the Fe2O3 sites dispersed inside the clusters. Here, by applying a gelatin template strategy, the structure of silica materials was tailored by changing the gelatin-to-silica ratio (0, 0.6, 1.2 and 1.8) and hydrothermal temperature (60 °C, 100 °C and 140 °C). The silica cluster size could be reduced using either a low gelatin-to-silica ratio (0.6) or a low hydrothermal temperature (60 °C). Increasing the gelatin-to-silica ratio to 1.2 created porous silica spheres with a hollow structure. The Fe2O3-loaded hollow porous silica spheres with a shell thickness of 280 nm had twice the maximum As(V) adsorption capacity (7.66 mg g-1) compared to the Fe2O3-loaded silica product prepared in the absence of gelatin (3.82 mg g-1). The maximum As(V) adsorption capacity could be further enhanced to 9.94 mg g-1 by reducing the shell thickness to 80 nm through increasing the gelatin-to-silica ratio to 1.8 and the hydrothermal temperature to 140 °C. In addition, the best Fe2O3-loaded hollow porous silica spheres had rapid As(V) adsorption and showed excellent durability as the As(V) removal efficiency slightly decreased to 98.9% subsequent to five adsorption-regeneration cycles.
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Affiliation(s)
- Thanapha Numpilai
- Department of Environmental Science, Faculty of Science and Technology, Thammasat University, Pathumthani, 12120, Thailand
| | - Waleeporn Donphai
- Center of Excellence on Petrochemical and Materials Technology, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand; Center for Advanced Studies in Nanotechnology for Chemical, Food and Agricultural Industries, KU Institute for Advanced Studies, Kasetsart University, Bangkok, 10900, Thailand
| | - Zehui Du
- Center of Excellence on Petrochemical and Materials Technology, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand; Center for Advanced Studies in Nanotechnology for Chemical, Food and Agricultural Industries, KU Institute for Advanced Studies, Kasetsart University, Bangkok, 10900, Thailand
| | - Chin Kui Cheng
- Center for Catalysis and Separation (CeCaS), Department of Chemical Engineering, College of Engineering, Khalifa University, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Manop Charoenchaitrakool
- Center of Excellence on Petrochemical and Materials Technology, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand
| | - Metta Chareonpanich
- Center of Excellence on Petrochemical and Materials Technology, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand; Center for Advanced Studies in Nanotechnology for Chemical, Food and Agricultural Industries, KU Institute for Advanced Studies, Kasetsart University, Bangkok, 10900, Thailand
| | - Thongthai Witoon
- Center of Excellence on Petrochemical and Materials Technology, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok, 10900, Thailand; Center for Advanced Studies in Nanotechnology for Chemical, Food and Agricultural Industries, KU Institute for Advanced Studies, Kasetsart University, Bangkok, 10900, Thailand.
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Moreno YP, de Escobar CC, Skovroinski E, Weibel DE, dos Santos JH. TiO2/SiO2 dopant-free nanophotocatalysts for highly efficient photocatalytic water splitting: Challenging traditional TiO2-based systems. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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40
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Effect of Analytical Particle Size on Pore Structure of High Volatile Bituminous Coal and Anthracite Using Low-Pressure N2 and CO2 Adsorption. ADSORPT SCI TECHNOL 2022. [DOI: 10.1155/2022/2548390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
To investigate the effect of analytical particle size on pore structure, mesopore (2-50 nm) and micropore (<2 nm) characteristics of high volatile bituminous coal and anthracite with different particle size were determined using low-pressure N2/CO2 adsorption analyses. Mesopore structure parameters in the two coals increase with decreasing particle size, which are attributed to the opening of closed mesopores during the pulverization process. The closed mesopores with different pore size ranges are opened with a certain percentage in high volatile bituminous coal, but opened irregularly in anthracite during pulverization. Micropore structure parameters of the two coals show different variations with decreasing particle size, which are not related to the reconstituted micropore structure. Mineral matter contributes more mesopores than organic matter in anthracite and exerts the negative effect on micropore in the two coals. An evolution model is established to elaborately describe the change of pore structure during the pulverization process, where mineral matter plays a mediating role in the effect of particle size on pore structure.
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41
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Mutreja V, Sharma MD, Rajput K, Sharma R, Mehta SK, Sareen S. Ag Nanostructures Decorated KIT-6 Meso-Composites for Catalytic Degradation of Nitroaromatics. Top Catal 2022. [DOI: 10.1007/s11244-022-01741-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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42
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Zakaria NZJ, Rozali S, Mubarak NM, Khalid M. Synthesis of magnetic nanocarbon using palm oil as the green precursor via microwave-assisted arc for wastewater treatment. Sci Rep 2022; 12:18698. [PMID: 36333525 PMCID: PMC9636159 DOI: 10.1038/s41598-022-21982-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022] Open
Abstract
The presence of metal with microwave irradiation has always invited controversial arguments as the metal will catch on fire easily. But interestingly, researchers found that arc discharge phenomena provide a promising way for molecule cracking to synthesize nanomaterials. This study developed a single-step yet affordable synthesis approach that combines microwave heating and arcing in transforming crude palm oil into magnetic nanocarbon (MNC), which can be considered a new alternative for the palm oil sectors. It involves synthesizing the medium at a partial inert condition with constant coiled stainless steel metal wire (dielectric media) and ferrocene (catalyst). This approach successfully demonstrates heating at a temperature ranging from 190.9 to 472.0 °C with different synthesis times (10-20 min). The produced MNC shows formations of spheres with average sizes of 20.38-31.04 nm, mesoporous structure (SBET: 14.83-151.95 m2/g), and high content of fixed carbon (52.79-71.24wt%), and the ratio of the D and G bands (ID/IG) is 0.98-0.99. The formation of new peaks in the FTIR spectra (522.29-588.48 cm-1) supports the appearance of the FeO compounds from the ferrocene. The magnetometer shows high magnetization saturation (22.32-26.84 emu/g) in ferromagnetic materials. The application of the MNC in wastewater treatment has been demonstrated by evaluating their adsorbent capability with Methylene Blue (MB) adsorption test at a different concentrations varying between 5 and 20 ppm. The MNC produced at synthesis time (20 min) shows the highest adsorption efficiency (10.36 mg/g) compared to others, with 87.79% removal of MB dye. As a result, the value for Langmuir is not promising compared to Freundlich, with R2 being around 0.80, 0.98, and 0.99 for MNC synthesized at 10 min (MNC10), 15 min (MNC15), and 20 min (MNC20), respectively. Hence, the adsorption system is in a heterogeneous condition. The microwave-assisted arcing thereby presents a promising approach to transforming CPO into MNC that could remove the hazardous dye.
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Affiliation(s)
- Nurul Zariah Jakaria Zakaria
- grid.10347.310000 0001 2308 5949Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Shaifulazuar Rozali
- grid.10347.310000 0001 2308 5949Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Nabisab Mujawar Mubarak
- grid.454314.3Petroleum and Chemical Engineering, Faculty of Engineering, Universiti Teknologi Brunei, Bandar Seri Begawan, BE1410 Brunei Darussalam
| | - Mohammad Khalid
- grid.430718.90000 0001 0585 5508Graphene and Advanced 2D Materials Research Group (GAMRG), School of Engineering and Technology, Sunway University, No. 5, Jalan University, Bandar Sunway, 47500 Subang Jaya, Selangor Malaysia
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Preparation of highly efficient and eco-friendly alumina magnetic hybrid nanosorbent from red mud: Excellent adsorption capacity towards nitrate. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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Dou S, Hao L, Liu H. A mesoscopic model for simulating the physisorption process in nanopores. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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45
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Kryazhev YG, Anikeeva IV, Trenikhin MV, Gulyaeva TI, Melnikov VP, Likholobov VA, Belskaya OB. Porous Carbon-Carbon Composite Materials Obtained by Alkaline Dehydrochlorination of Polyvinyl Chloride. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7636. [PMID: 36363230 PMCID: PMC9653659 DOI: 10.3390/ma15217636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/20/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
Porous carbon-carbon composite materials (PCCCM) were synthesized by the alkaline dehydrochlorination of polyvinyl chloride solutions in dimethyl sulfoxide containing the modifying additives of a nanostructured component (NC): graphite oxide (GO), reduced graphite oxide (RGO) or nanoglobular carbon (NGC), with subsequent two-step thermal treatment of the obtained polyvinylene-NC composites (carbonization at 400 °C and carbon dioxide activation at 900 °C). The focus of the study was on the analysis and digital processing of transmission electron microscopy images to study local areas of carbon composite materials, as well as to determine the distances between graphene layers. TEM and low-temperature nitrogen adsorption studies revealed that the structure of the synthesized PCCCM can be considered as a porous carbon matrix in which either carbon nanoglobules (in the case of NGC) or carbon particles with the "crumpled sheet" morphology (in the case of GO or RGO used as the modifying additives) are distributed. Depending on the features of the introduced 5-7 wt.% nanostructured component, the fraction of mesopores was shown to vary from 11% to 46%, and SBET-from 791 to 1115 m2 g-1. The synthesis of PCCNC using graphite oxide and reduced graphite oxide as the modifying additives can be considered as a method for synthesizing a porous carbon material with the hierarchical structure containing both the micro- and meso/macropores. Such materials are widely applied and can serve as adsorbents, catalyst supports, elements of power storage systems, etc.
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Affiliation(s)
- Yury G. Kryazhev
- Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 644040 Omsk, Russia
| | - Irina V. Anikeeva
- Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 644040 Omsk, Russia
| | - Mikhail V. Trenikhin
- Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 644040 Omsk, Russia
- Petrochemical Institute, Department Chemistry and Chemical Technology, Omsk State Technical University, 644050 Omsk, Russia
| | - Tatiana I. Gulyaeva
- Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 644040 Omsk, Russia
| | - Valeriy P. Melnikov
- N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, 119991 Moscow, Russia
| | - Vladimir A. Likholobov
- Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630090 Novosibirsk, Russia
| | - Olga B. Belskaya
- Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 644040 Omsk, Russia
- Petrochemical Institute, Department Chemistry and Chemical Technology, Omsk State Technical University, 644050 Omsk, Russia
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46
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Wang Z, Cheng Y, Wang G, Zhao W, Wang L, Ni G. Experimental study on geometric parameters of pore structure and quantitative evaluation of complexity of pulverized coal with different metamorphic degrees. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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47
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Sun Z, Kang Y, Li S. Elastic Properties of Confined Fluids in Nanopores: An Acoustic-Propagation Model. J Phys Chem B 2022; 126:8010-8020. [PMID: 36179366 DOI: 10.1021/acs.jpcb.2c05125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Following the compressibility route in statistical mechanics, the local isothermal modulus is derived for nanoconfined fluids. Based on this inhomogeneous modulus, an acoustic-propagation model (APM) is first proposed for averaged isothermal modulus in the pore. By utilizing the density profiles obtained from classical density functional theory, the inhomogeneous modulus of supercritical methane in the graphite slit pore is calculated. It is found that the profile of the modulus in the pore is out of phase with that of density. Further, employing the proposed APM method, the averaged isothermal modulus is calculated, and the effects of pressure, pore size, and temperature on the averaged modulus are investigated. It is found that (i) averaged modulus obtained from APM method still satisfies the Tait-Murnaghan (TM) equation, (ii) the averaged modulus is proportional to the reciprocal pore width for wider pores, while it oscillates with the reciprocal pore width for narrower pores, and (iii) the reciprocal modulus is proportional to temperature, while the linearization coefficient is insensitive to the pore size. These findings bear important implications for understanding the elasticity in fluid-saturated nanoporous media and may shed light on the capture or storage of special gases in the fields of geochemistry and geophysics.
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Affiliation(s)
- Zongli Sun
- Department of Mathematics and Physics, North China Electric Power University, Baoding071003, China.,Hebei Key Laboratory of Physics and Energy Technology, Baoding071003, China
| | - Yanshuang Kang
- College of Science, Hebei Agricultural University, Baoding071001, China
| | - Songtao Li
- Department of Mathematics and Physics, North China Electric Power University, Baoding071003, China.,Hebei Key Laboratory of Physics and Energy Technology, Baoding071003, China
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48
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La Cognata S, Mobili R, Milanese C, Boiocchi M, Gaboardi M, Armentano D, Jansen JC, Monteleone M, Antonangelo AR, Carta M, Amendola V. CO
2
Separation by Imide/Imine Organic Cages. Chemistry 2022; 28:e202201631. [PMID: 35762229 PMCID: PMC9545214 DOI: 10.1002/chem.202201631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Indexed: 11/12/2022]
Abstract
Two novel imide/imine‐based organic cages have been prepared and studied as materials for the selective separation of CO2 from N2 and CH4 under vacuum swing adsorption conditions. Gas adsorption on the new compounds showed selectivity for CO2 over N2 and CH4. The cages were also tested as fillers in mixed‐matrix membranes for gas separation. Dense and robust membranes were obtained by loading the cages in either Matrimid® or PEEK‐WC polymers. Improved gas‐transport properties and selectivity for CO2 were achieved compared to the neat polymer membranes.
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Affiliation(s)
- Sonia La Cognata
- Department of Chemistry University of Pavia Viale Tarquato Taramelli 12 Pavia 27100 Italy
| | - Riccardo Mobili
- Department of Chemistry University of Pavia Viale Tarquato Taramelli 12 Pavia 27100 Italy
| | - Chiara Milanese
- Department of Chemistry University of Pavia Viale Tarquato Taramelli 12 Pavia 27100 Italy
| | - Massimo Boiocchi
- Centro Grandi Strumenti University of Pavia Via Bassi 21 Pavia 27100 Italy
| | - Mattia Gaboardi
- Elettra sincrotrone Trieste S.C.p.a. Area science park Basovizza (TS) 34149 Italy
| | - Donatella Armentano
- Department of Chemistry & Chemical Technologies University of Calabria Via P. Bucci, 13/C 87036 Rende (CS) Italy
| | - Johannes C. Jansen
- Institute on Membrane Technology National Research Council of Italy (CNR-ITM) Via P. Bucci 17/C Rende (CS) 87036 Italy
| | - Marcello Monteleone
- Institute on Membrane Technology National Research Council of Italy (CNR-ITM) Via P. Bucci 17/C Rende (CS) 87036 Italy
| | - Ariana R. Antonangelo
- Department of Chemistry College of Science Swansea University Singleton Park Swansea Wales, SA2 8PP UK
| | - Mariolino Carta
- Department of Chemistry College of Science Swansea University Singleton Park Swansea Wales, SA2 8PP UK
| | - Valeria Amendola
- Department of Chemistry University of Pavia Viale Tarquato Taramelli 12 Pavia 27100 Italy
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49
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Balderas-Xicohténcatl R, Lin HH, Lurz C, Daemen L, Cheng Y, Cychosz Struckhoff K, Guillet-Nicolas R, Schütz G, Heine T, Ramirez-Cuesta AJ, Thommes M, Hirscher M. Formation of a super-dense hydrogen monolayer on mesoporous silica. Nat Chem 2022; 14:1319-1324. [PMID: 36038772 DOI: 10.1038/s41557-022-01019-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 07/06/2022] [Indexed: 11/09/2022]
Abstract
Adsorption on various adsorbents of hydrogen and helium at temperatures close to their boiling points shows, in some cases, unusually high monolayer capacities. The microscopic nature of these adsorbate phases at low temperatures has, however, remained challenging to characterize. Here, using high-resolution cryo-adsorption studies together with characterization by inelastic neutron scattering vibration spectroscopy, we show that, near its boiling point (~20 K), H2 adsorbed on a well-ordered mesoporous silica forms a two-dimensional monolayer with a density more than twice that of bulk-solid H2, rather than a bilayer. Theoretical studies, based on thorough first-principles calculations, rationalize the formation of such a super-dense phase. The strong compression of the hydrogen surface layer is due to the excess of surface-hydrogen attraction over intermolecular hydrogen repulsion. Use of this super-dense hydrogen monolayer on an adsorbent might be a feasible option for the storage of hydrogen near its boiling point, compared with adsorption at 77 K.
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Affiliation(s)
- Rafael Balderas-Xicohténcatl
- Max Planck Institute for Intelligent Systems, Stuttgart, Germany. .,Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
| | - Hung-Hsuan Lin
- Helmholtz Center Dresden-Rossendorf, Institute of Resource Ecology, Leipzig Branch, Leipzig, Germany
| | - Christian Lurz
- Helmholtz Center Dresden-Rossendorf, Institute of Resource Ecology, Leipzig Branch, Leipzig, Germany
| | - Luke Daemen
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Yongqiang Cheng
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | | | - Remy Guillet-Nicolas
- Laboratoire Catalyse et Spectrochemiem, Normandie University, ENSICAEN, CNRS, Caen, France
| | - Gisela Schütz
- Max Planck Institute for Intelligent Systems, Stuttgart, Germany
| | - Thomas Heine
- Helmholtz Center Dresden-Rossendorf, Institute of Resource Ecology, Leipzig Branch, Leipzig, Germany.,School of Mathematics and Science, TU Dresden, Dresden, Germany.,Department of Chemistry, Yonsei University, Seodaemun-gu, Seoul, Republic of Korea
| | - Anibal J Ramirez-Cuesta
- Neutron Scattering Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Matthias Thommes
- Institute of Separation Science and Technology, Department of Chemical and Biological Engineering (CBI), Friedrich-Alexander University, Erlangen, Germany
| | - Michael Hirscher
- Max Planck Institute for Intelligent Systems, Stuttgart, Germany.
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50
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Antonangelo AR, Hawkins N, Tocci E, Muzzi C, Fuoco A, Carta M. Tröger's Base Network Polymers of Intrinsic Microporosity (TB-PIMs) with Tunable Pore Size for Heterogeneous Catalysis. J Am Chem Soc 2022; 144:15581-15594. [PMID: 35973136 PMCID: PMC9437925 DOI: 10.1021/jacs.2c04739] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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Heterogeneous catalysis plays a pivotal role in the preparation
of value-added chemicals, and it works more efficiently when combined
with porous materials and supports. Because of that, a detailed assessment
of porosity and pore size is essential when evaluating the performance
of new heterogeneous catalysts. Herein, we report the synthesis and
characterization of a series of novel microporous Tröger’s
base polymers and copolymers (TB-PIMs) with tunable pore size. The
basicity of TB sites is exploited to catalyze the Knoevenagel condensation
of benzaldehydes and malononitrile, and the dimension of the pores
can be systematically adjusted with an appropriate selection of monomers
and comonomers. The tunability of the pore size provides the enhanced
accessibility of the catalytic sites for substrates, which leads to
a great improvement in conversions, with the best results achieving
completion in only 20 min. In addition, it enables the use of large
benzaldehydes, which is prevented when using polymers with very small
pores, typical of conventional PIMs. The catalytic reaction is more
efficient than the corresponding homogeneous counterpart and is ultimately
optimized with the addition of a small amount of a solvent, which
facilitates the swelling of the pores and leads to a further improvement
in the performance and to a better carbon economy. Molecular dynamic
modeling of the copolymers’ structures is employed to describe
the swellability of flexible chains, helping the understanding of
the improved performance and demonstrating the great potential of
these novel materials.
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Affiliation(s)
- Ariana R Antonangelo
- Department of Chemistry, Faculty of Science and Engineering, Swansea University, Grove Building, Singleton Park, Swansea SA2 8PP, U.K
| | - Natasha Hawkins
- Department of Chemistry, Faculty of Science and Engineering, Swansea University, Grove Building, Singleton Park, Swansea SA2 8PP, U.K
| | - Elena Tocci
- Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), via P. Bucci 17/C, Rende (CS) 87036, Italy
| | - Chiara Muzzi
- Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), via P. Bucci 17/C, Rende (CS) 87036, Italy
| | - Alessio Fuoco
- Institute on Membrane Technology, National Research Council of Italy (CNR-ITM), via P. Bucci 17/C, Rende (CS) 87036, Italy
| | - Mariolino Carta
- Department of Chemistry, Faculty of Science and Engineering, Swansea University, Grove Building, Singleton Park, Swansea SA2 8PP, U.K
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