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Ma Y, Cai K, Xu G, Xie Y, Huang P, Zeng J, Zhu Z, Luo J, Hu H, Zhao K, Chen M, Zheng K. Large-Scale and Highly Efficient Production of Ultrafine PVA Fibers by Electro-Centrifugal Spinning for NH 3 Adsorption. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2903. [PMID: 37049196 PMCID: PMC10095733 DOI: 10.3390/ma16072903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 03/23/2023] [Accepted: 03/31/2023] [Indexed: 06/19/2023]
Abstract
Ultrafine Polyvinyl alcohol (PVA) fibers have an outstanding potential in various applications, especially in absorbing fields. In this manuscript, an electrostatic-field-assisted centrifugal spinning system was designed to improve the production efficiency of ultrafine PVA fibers from PVA aqueous solution for NH3 adsorption. It was established that the fiber production efficiency using this self-designed system could be about 1000 times higher over traditional electrospinning system. The produced PVA fibers establish high morphology homogeneity. The impact of processing variables of the constructed spinning system including rotation speed, needle size, liquid feeding rate, and voltage on fiber morphology and diameter was systematically investigated by SEM studies. To acquire homogeneous ultrafine PVA fiber membranes, the orthogonal experiment was also conducted to optimize the spinning process parameters. The impact weight of different studied parameters on the spinning performance was thus provided. The experimental results showed that the morphology of micro/nano-fibers can be well controlled by adjusting the spinning process parameters. Ultrafine PVA fibers with the diameter of 2.55 μm were successfully obtained applying the parameters, including rotation speed (6500 rpm), needle size (0.51 mm), feeding rate (3000 mL h-1), and voltage (20 kV). Furthermore, the obtained ultrafine PVA fiber mat was demonstrated to be capable of selectively adsorbing NH3 gas relative to CO2, thus making it promising for NH3 storage and other environmental purification applications.
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Affiliation(s)
- Youye Ma
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China; (Y.M.); (K.C.); (Y.X.); (P.H.); (H.H.); (K.Z.); (M.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, Foshan University, Foshan 528000, China
| | - Kanghui Cai
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China; (Y.M.); (K.C.); (Y.X.); (P.H.); (H.H.); (K.Z.); (M.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, Foshan University, Foshan 528000, China
- China Foshan Nanofiberlabs Co., Ltd., Foshan 528225, China; (G.X.); (J.Z.); (Z.Z.)
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530005, China
| | - Guojie Xu
- China Foshan Nanofiberlabs Co., Ltd., Foshan 528225, China; (G.X.); (J.Z.); (Z.Z.)
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Yueling Xie
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China; (Y.M.); (K.C.); (Y.X.); (P.H.); (H.H.); (K.Z.); (M.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, Foshan University, Foshan 528000, China
| | - Peng Huang
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China; (Y.M.); (K.C.); (Y.X.); (P.H.); (H.H.); (K.Z.); (M.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, Foshan University, Foshan 528000, China
| | - Jun Zeng
- China Foshan Nanofiberlabs Co., Ltd., Foshan 528225, China; (G.X.); (J.Z.); (Z.Z.)
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Ziming Zhu
- China Foshan Nanofiberlabs Co., Ltd., Foshan 528225, China; (G.X.); (J.Z.); (Z.Z.)
- State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
| | - Jie Luo
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China; (Y.M.); (K.C.); (Y.X.); (P.H.); (H.H.); (K.Z.); (M.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, Foshan University, Foshan 528000, China
| | - Huawen Hu
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China; (Y.M.); (K.C.); (Y.X.); (P.H.); (H.H.); (K.Z.); (M.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, Foshan University, Foshan 528000, China
| | - Kai Zhao
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China; (Y.M.); (K.C.); (Y.X.); (P.H.); (H.H.); (K.Z.); (M.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, Foshan University, Foshan 528000, China
| | - Min Chen
- School of Materials Science and Hydrogen Energy, Foshan University, Foshan 528000, China; (Y.M.); (K.C.); (Y.X.); (P.H.); (H.H.); (K.Z.); (M.C.)
- Guangdong Key Laboratory for Hydrogen Energy Technologies, Foshan University, Foshan 528000, China
| | - Kun Zheng
- Department of Hydrogen Energy, Faculty of Energy and Fuels, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland
- AGH Centre of Energy, AGH University of Science and Technology, ul. Czarnowiejska 36, 30-054 Krakow, Poland
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Yuan F, Yang Z, Zhang X, Tong C, Gahungu G, Li W, Zhang J. Judicious design functionalized 3D-COF to enhance CO 2 adsorption and separation. J Comput Chem 2021; 42:888-896. [PMID: 33713464 DOI: 10.1002/jcc.26510] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 01/20/2021] [Accepted: 02/13/2021] [Indexed: 02/02/2023]
Abstract
The effects of functional groups (including OH, OCH3 , NH2 , CH2 NH2 , COOH, SO3 H, OCO(CH2 )2 COOH(E-COOH), and (CH2 )4 COOH(c-COOH)) in 3D covalent organic frameworks (3D-COFs) on CO2 adsorption and separation are investigated by grand canonical Monte Carlo (GCMC) simulations and density functional theory calculations. The results indicate that interaction between CO2 and the framework is the main factor for determining CO2 uptakes at low pressure, while pore size becomes the decisive factor at high pressure. The binding energy of CO2 with functionalized linker is correlated to CO2 uptake at 0.3 bar and 298 K on 3D-COF-1, suggesting functional groups play a key role in CO2 capture in microporous 3D-COFs. Moreover, CO2 selectivity over CH4 , N2 , and H2 can be significantly enhanced by functionalization, where CH2 NH2 , COOH, SO3 H, and E-COOH enhance CO2 adsorption more effectively at 1 bar. Among them, SO3 H is the most promising functional group in 3D-COFs for CO2 separation.
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Affiliation(s)
- Fang Yuan
- Faculty of Chemistry, Northeast Normal University, Changchun, China
| | - Zhifang Yang
- Faculty of Chemistry, Northeast Normal University, Changchun, China
| | - Xiaoying Zhang
- Faculty of Chemistry, Northeast Normal University, Changchun, China
| | - Cuiyan Tong
- Faculty of Chemistry, Northeast Normal University, Changchun, China
| | - Godefroid Gahungu
- Faculté des Sciences, Centre de Recherche en Sciences Naturelles et Environnementales (CRSNE), Université du Burundi, Bujumbura, Burundi
| | - Wenliang Li
- Faculty of Chemistry, Northeast Normal University, Changchun, China
| | - Jingping Zhang
- Faculty of Chemistry, Northeast Normal University, Changchun, China
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Guo F, Liu Y, Hu J, Liu H, Hu Y. Fast screening of porous materials for noble gas adsorption and separation: a classical density functional approach. Phys Chem Chem Phys 2018; 20:28193-28204. [PMID: 30395136 DOI: 10.1039/c8cp03777a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The design and screening of porous materials for noble gas adsorption and separation are an important issue in the production and utilization of gases. The conventional method to do this is via molecular simulation. In this work, we introduced a classical density functional theory (CDFT) to replace molecular simulation because CDFT is more efficient. A molecular dynamics (MD)/CDFT combined method was proposed to consider the flexibility of the adsorbent. The theory was first examined by comparing it to reported experiments and simulations. Then, the theory was applied to determine the most favorable adsorbents for noble gas adsorption/separation from 4764 real adsorbents and 1200 hypothetical adsorbents. A series of favorable adsorbents was identified, and some of them seemed promising. The macroscopic adsorption isotherms and microscopic density profiles of the most favorable adsorbents were examined, and the adsorption mechanisms were revealed. The specific separation of Kr/Xe was examined, and two of the adsorbents showed higher adsorption efficiency than shown in previously reported data.
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Affiliation(s)
- Fangyuan Guo
- State Key Laboratory of Chemical Engineering and School of Chemistry, East China University of Science and Technology, Shanghai 200237, China
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Abstract
A novel type of trivalent BNg five-membered cational species B5Ngn3+(Ng = He~Rn, n = 1~5) has been found and investigated theoretically using the B3LYP and MP2 methods with the def2-QZVPPD and def2-TZVPPD basis sets. The geometry, harmonic vibrational frequencies, bond energies, charge distribution, bond nature, aromaticity, and energy decomposition analysis of these structures were reported. The calculated B-Ng bond energy is quite large (the averaged bond energy is in the range of 209.2~585.76 kJ mol-1) for heavy rare gases and increases with the Ng atomic number. The analyses of the molecular wavefunction show that in the BNg compounds of heavy Ng atoms Ar~Rn, the B-Ng bonds are of typical covalent character. Nuclear independent chemical shifts display that both B53+ and B5Ngn3+(n=1~5) have obvious aromaticity. Energy decomposition analysis shows that these BNg compounds are mainly stabilized by the σ-donation from the Ng valence p orbital to the B53+ LUMO. These findings offer valuable clues toward the design and synthesis of new stable Ng-containing compounds.
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