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学者姓名：王乃鑫
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摘要 ：
Two-dimensional nanosheets are considered promising materials for membranes. However, the excessively long interlayer channels parallel to the membrane surface are not conducive to molecular transport. Creating defects on the nanosheets is an effective method to shorten the transport distance in the membrane. This study involved exfoliating and etching several commonly used layered double hydroxide (LDH) nanosheets using an alkali solution in a single step. This process resulted in porous oligolayered nanosheets modified layered double hydroxide (MgAl-MLDH) with an average pore size of approximately 18 +/- 2 nm and a thickness of around 8 nm. These ultrathin porous MgAl-MLDH nanosheets were used to create a composite membrane using a vacuumassisted filtration method. The structure of the MgAl-MLDH membrane was optimized by adjusting the etching conditions. The water flux of MgAl-MLDH membrane in Eriochrome black T aqueous solution was 530 L/ m2 h MPa. Compared with the non-etched LDH membrane (179 L/m2 h MPa), the permeance of MLDH membrane was increased by 2 to 3 times, while the rejection rate remained at approximately 99 %. Furthermore, due to the excellent strength of LDH, the membrane exhibited good stability in both structure and separation performance.
关键词 ：
Modified layered double hydroxide Modified layered double hydroxide Nanofiltration Nanofiltration Alkali etching Alkali etching High permeance High permeance Two-dimensional materials Two-dimensional materials
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| GB/T 7714 | Lu, Yahua , He, Yafei , Li, Jie et al. One-step exfoliation and etching of layered double hydroxide nanosheets to construct nanofiltration membranes with high water permeance [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2024 , 354 . |
| MLA | Lu, Yahua et al. "One-step exfoliation and etching of layered double hydroxide nanosheets to construct nanofiltration membranes with high water permeance" . | SEPARATION AND PURIFICATION TECHNOLOGY 354 (2024) . |
| APA | Lu, Yahua , He, Yafei , Li, Jie , Wang, Naixin , An, Quan-Fu . One-step exfoliation and etching of layered double hydroxide nanosheets to construct nanofiltration membranes with high water permeance . | SEPARATION AND PURIFICATION TECHNOLOGY , 2024 , 354 . |
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摘要 ：
The separation of aromatic/aliphatic hydrocarbon mixtures is crucial in the petrochemical industry. Pervaporation is regarded as a promising approach for the separation of aromatic compounds from alkanes. Developing membrane materials with efficient separation performance is still the main task since the membrane should provide chemical stability, high permeation flux, and selectivity. In this study, the hyperbranched polymer (HBP) was deposited on the outer surface of a polyvinylidene fluoride (PVDF) hollow-fiber ultrafiltration membrane by a facile dip-coating method. The dip-coating rate, HBP concentration, and thermal cross-linking temperature were regulated to optimize the membrane structure. The obtained HBP/PVDF hollow-fiber-composite membrane had a good separation performance for aromatic/aliphatic hydrocarbon mixtures. For the 50%/50% (mass) toluene/n-heptane mixture, the permeation flux of optimized composite membranes could reach 1766 g center dot m-2 center dot h-1, with a separation factor of 4.1 at 60 degrees C. Therefore, the HBP/PVDF hollow-fiber-composite membrane has great application prospects in the pervaporation separation of aromatic/aliphatic hydrocarbon mixtures. (c) 2024 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.
关键词 ：
Aromatic/aliphatic hydrocarbons Aromatic/aliphatic hydrocarbons Pervaporation Pervaporation Hollow fiber membrane Hollow fiber membrane Dip-coating Dip-coating Hyperbranched polymer Hyperbranched polymer
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| GB/T 7714 | Liu, Tong , Sun, Hao , Wang, Xiangqiong et al. Hyperbranched polymer hollow-fiber-composite membranes for pervaporation separation of aromatic/aliphatic hydrocarbon mixtures [J]. | CHINESE JOURNAL OF CHEMICAL ENGINEERING , 2024 , 69 : 13-22 . |
| MLA | Liu, Tong et al. "Hyperbranched polymer hollow-fiber-composite membranes for pervaporation separation of aromatic/aliphatic hydrocarbon mixtures" . | CHINESE JOURNAL OF CHEMICAL ENGINEERING 69 (2024) : 13-22 . |
| APA | Liu, Tong , Sun, Hao , Wang, Xiangqiong , Li, Jie , Zhang, Zhanquan , Wu, Pei et al. Hyperbranched polymer hollow-fiber-composite membranes for pervaporation separation of aromatic/aliphatic hydrocarbon mixtures . | CHINESE JOURNAL OF CHEMICAL ENGINEERING , 2024 , 69 , 13-22 . |
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摘要 ：
一种具有取向性的单颗粒层MOF复合膜及制备方法，属于膜制备技术领域，首先利用调制剂合成具有规则形貌且粒径均一的MOF晶体颗粒，然后将其配制为MOF分散液；使用旋涂法将MOF分散液涂覆于多孔基底的表面后干燥一定时间得到具有取向性的单颗粒MOF层。然后将一定浓度的聚合物溶液通过旋涂法涂覆于膜表面以填充单颗粒MOF晶体的间隙。最后通过热交联得到单颗粒层取向MOF复合膜，该方法可以有效构建具有贯通孔道结构的新型MOF复合膜，并且所得到的膜可用于有机溶剂混合物等高耗能、难分离体系的高效分离。
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| GB/T 7714 | 王乃鑫 , 孙皓 , 程子洋 et al. 一种具有取向性的单颗粒层MOF复合膜及制备方法 : CN202310792134.0[P]. | 2023-06-29 . |
| MLA | 王乃鑫 et al. "一种具有取向性的单颗粒层MOF复合膜及制备方法" : CN202310792134.0. | 2023-06-29 . |
| APA | 王乃鑫 , 孙皓 , 程子洋 , 王湘琼 , 王丰恺 , 安全福 . 一种具有取向性的单颗粒层MOF复合膜及制备方法 : CN202310792134.0. | 2023-06-29 . |
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摘要 ：
一种用于优先透醇的聚合物/MOF衍生物复合膜的制备方法，属于复合材料和渗透汽化技术领域。将具有适宜粘度的含硅聚合物旋涂在MOF衍生物膜上表面和缝隙处，然后经真空干燥后制得聚合物/MOF衍生物复合膜。其中MOF衍生物膜是通过原位生长以及随后采用硫代乙酰胺(TAA)进行原位硫化两步法所制备。本发明制备方法简单可控，所制备的聚合物/MOF衍生物复合膜具有超薄的厚度，并有效防止聚合物孔渗，此外基于MOF衍生物中超快的渗透路径，在60℃分离5wt.％乙醇‑水溶液时，复合膜表现出超高的渗透汽化性能和稳定性，有效改善了分离膜领域此消彼长trade‑off的瓶颈问题。
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| GB/T 7714 | 王乃鑫 , 王丰恺 , 孙皓 et al. 一种用于优先透醇的聚合物/MOF衍生物复合膜的制备方法 : CN202310836526.2[P]. | 2023-07-09 . |
| MLA | 王乃鑫 et al. "一种用于优先透醇的聚合物/MOF衍生物复合膜的制备方法" : CN202310836526.2. | 2023-07-09 . |
| APA | 王乃鑫 , 王丰恺 , 孙皓 , 沈梦鑫 , 李杰 , 安全福 . 一种用于优先透醇的聚合物/MOF衍生物复合膜的制备方法 : CN202310836526.2. | 2023-07-09 . |
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摘要 ：
Pervaporation has been considered a promising technique in seawater desalination. Developing new and efficient pervaporation membrane material remains the main challenge. In this study, the layered double hydroxides (LDH) nanosheet array composite membranes were prepared on a commercial polyacrylonitrile ultrafiltration membrane through the hydrothermal method. The structure and morphology of the LDH array was regulated by the hydrolysis of the substrate and the hydrothermal conditions. The obtained LDH composite membrane had a good pervaporation desalination performance due to its unique water molecular transport channel and high hydrophilicity. When the salt concentration in the feed solution increased from 3 to 10 wt%, the rejection of the composite membrane could maintain at 99.8 %. The real seawater was also used to evaluate the membrane. The results indicated the LDH composite membrane had a good desalination performance in a relatively wide range. Moreover, the LDH composite membrane exhibited excellent flexibility and stability. We anticipated that the membrane may have great potential in pervaporation desalination.
关键词 ：
Pervaporation Pervaporation Flexible Flexible Composite membrane Composite membrane Desalination Desalination Layered double hydroxide Layered double hydroxide
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| GB/T 7714 | Yang, Yuye , Sun, Hao , Wang, Xiangqiong et al. Flexible layered double hydroxides array composite membrane for efficient pervaporation desalination [J]. | JOURNAL OF MEMBRANE SCIENCE , 2023 , 692 . |
| MLA | Yang, Yuye et al. "Flexible layered double hydroxides array composite membrane for efficient pervaporation desalination" . | JOURNAL OF MEMBRANE SCIENCE 692 (2023) . |
| APA | Yang, Yuye , Sun, Hao , Wang, Xiangqiong , Li, Jie , Wang, Naixin , An, Quan-Fu . Flexible layered double hydroxides array composite membrane for efficient pervaporation desalination . | JOURNAL OF MEMBRANE SCIENCE , 2023 , 692 . |
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摘要 ：
Pervaporation is considered to have great potential for application in the field of organic-solvent dehydration. In this study, a type of keto-enamine-linked covalent organic framework TpPa (synthesized using the Schiff-base reaction of 1,3,5-triformylphloroglucinol [Tp] with p-phenylenediamine [Pa]), was fabricated on commercial polyacrylonitrile (PAN) ultrafiltration membranes through an oxygen-plasma assisted contra-diffusion self-assembly strategy for organic-solvent dehydration. The PAN membranes with a glycerol exhibited a better separation factor for dehydration of organic solvents than those without a glycerol layer. The influence of oxygen plasma and glycerol on the formation of the TpPa membrane was investigated. The best plasma treatment condition and optimum glycerol impregnation concentration were determined as a device power of 60 W and 30 wt%, respectively. Defect-free TpPa membrane formation took only 24 h. The as-prepared TpPa membrane exhibited a separation factor of 1491 and a high permeation flux of 2530 g m(-2) h(-1) for a 90 wt% isopropanol-water mixture. The separation performance of the TpPa membrane was stable for >100 h, exhibiting great potential in organic-solvent dehydration.
关键词 ：
Covalent organic framework Covalent organic framework Organic-solvent dehydration Organic-solvent dehydration Contra-diffusion self-assembly Contra-diffusion self-assembly Pervaporation Pervaporation Oxygen plasma etching Oxygen plasma etching
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| GB/T 7714 | Wang, Xiangqiong , Wang, Naixin , Ni, Hongxu et al. Oxygen plasma-assisted contra-diffusion self-assembly of covalent organic framework pervaporation membranes for organic-solvent dehydration [J]. | JOURNAL OF MEMBRANE SCIENCE , 2023 , 665 . |
| MLA | Wang, Xiangqiong et al. "Oxygen plasma-assisted contra-diffusion self-assembly of covalent organic framework pervaporation membranes for organic-solvent dehydration" . | JOURNAL OF MEMBRANE SCIENCE 665 (2023) . |
| APA | Wang, Xiangqiong , Wang, Naixin , Ni, Hongxu , Liu, Tong , An, Quan-Fu . Oxygen plasma-assisted contra-diffusion self-assembly of covalent organic framework pervaporation membranes for organic-solvent dehydration . | JOURNAL OF MEMBRANE SCIENCE , 2023 , 665 . |
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摘要 ：
Zeolitic imidazolate framework (ZIF) membranes have great potential applications in nanofiltration. However, preparing continuous and intact ZIF membranes on the surface of a substrate remains challenging. In this study, we assembled ZIF-8 nanoparticles in situ in the pores of a porous alumina substrate via a freezing-assisted counter-diffusion method. Although a continuous ZIF-8 membrane was not formed on the surface of the sub-strate, the obtained nano-confined composite membrane was dense enough to separate antibiotics and salt. The rejection rate of tetracycline was above 99 %, while that of sodium chloride was below 20 %, demonstrating good antibiotic desalination performance. The permeance of the ZIF-8 membrane reached 23.5 LMH/bar. Due to the nano-confined structure, the obtained ZIF-8 composite membrane was robust. Besides, polishing the surface layer did not reduce the separation performance. Moreover, sulfurizing the ZIF-8 membrane improved its sta-bility in water. It also improved the permeance to 31.3 LMH/bar, which remained stable for 100 h. Therefore, the obtained robust ZIF-8 membrane and its derivative composite membrane fabricated via freezing-assisted counter-diffusion have great potential in antibiotic desalination.
关键词 ：
ZnS membrane ZnS membrane ZIF-8 membrane ZIF-8 membrane Counter-diffusion Counter-diffusion Freezing assistance Freezing assistance Antibiotic desalination Antibiotic desalination
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| GB/T 7714 | Wang, Chengcheng , Sun, Hao , Wang, Naixin et al. Robust ZIF-8 and its derivative composite membrane for antibiotic desalination with high performance [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2023 , 307 . |
| MLA | Wang, Chengcheng et al. "Robust ZIF-8 and its derivative composite membrane for antibiotic desalination with high performance" . | SEPARATION AND PURIFICATION TECHNOLOGY 307 (2023) . |
| APA | Wang, Chengcheng , Sun, Hao , Wang, Naixin , An, Quan-Fu . Robust ZIF-8 and its derivative composite membrane for antibiotic desalination with high performance . | SEPARATION AND PURIFICATION TECHNOLOGY , 2023 , 307 . |
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摘要 ：
As an important resource, lithium is abundant in Salt Lake. The high Mg2+/Li+ ratio is the main obstacle to lithium extraction. Positively-charged nanofiltration membrane has shown great potential in the separation of Mg2+/Li+. Herein, we report a facile method to construct positively-charged nanofiltration membrane by polyethyleneimine (PEI) and layered double hydroxide (LDH) nanosheets on hydrolyzed polyacrylonitrile ultrafiltration membrane. Subsequently, the PEI-LDH composite membrane was crosslinked with glutaraldehyde (GA) to improve its stability. The incorporation of LDH could improve the positive charge of the membrane. Then, the obtained PEI-LDH/GA membrane showed an enhanced separation performance for separating Mg2+/Li+ in an aqueous solution. When the Mg2+/Li+ ratio was 10, the membrane showed a separation factor (SMg2+/Li+) of 18.7. Moreover, the membrane could maintain the separation performance for 100 h, which exhibited a potential application in Mg2+/Li+ separation.
关键词 ：
Nanofiltration Nanofiltration Positively charged membrane Positively charged membrane Mg2+/Li+ separation Mg2+/Li+ separation Layered double hydroxides Layered double hydroxides
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| GB/T 7714 | Ni, Hongxu , Wang, Naixin , Yang, Yuye et al. Positively-charged nanofiltration membrane constructed by polyethyleneimine/layered double hydroxide for Mg2+/Li+ separation [J]. | DESALINATION , 2023 , 548 . |
| MLA | Ni, Hongxu et al. "Positively-charged nanofiltration membrane constructed by polyethyleneimine/layered double hydroxide for Mg2+/Li+ separation" . | DESALINATION 548 (2023) . |
| APA | Ni, Hongxu , Wang, Naixin , Yang, Yuye , Shen, Mengxin , An, Quan-Fu . Positively-charged nanofiltration membrane constructed by polyethyleneimine/layered double hydroxide for Mg2+/Li+ separation . | DESALINATION , 2023 , 548 . |
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摘要 ：
Acetic acid, as one of the top 50 important chemicals, has been broadly applied for production of cellulose acetate, polyvinyl acetate, as well as synthetic fibers and fabrics, and so on. However, the acetic acid production always involves in water which should be removed. Thus, energy-efficient and environmental-friendly dehydration of acetic acid is highly required in current chemical industry. In this study, we proposed a 'hard-crosslinking-soft' strategy to construct a kind of organic-inorganic hybrid membrane by doping aminated silica (SiO2-NH2) nanoparticles into the polyelectrolyte complex (PEC) membrane for dehydration of acetic acid. The addition of SiO2-NH2 nanoparticles plays two roles: one is as the 'hard' part to overcome the over-swelling issue of 'soft' PEC membrane; another is creation of more free volume for water passing through. As a result, the proposed hybrid membrane could simultaneously augment the permeability and selectivity of the pervaporation membrane, breaking the notorious 'trade-off' restriction of separation membranes. The preparation parameters and operation condition on the performance of the membrane were detailed studied. The optimized membrane offers a flux of 1225 g/m2h and a separation factor of 1442 in dehydration of 10 wt% water/acetic acid mixtures at 50 degrees C, with pervaporation separation index of 1.77 x 106 g/m2h, among the top-tier separation performance. Besides, the prepared membrane could stably work for 144 h due to the chemical crosslinking by glyoxal, promising for the practical application for acetic acid dehydration.
关键词 ：
Acetic acid dehydration Acetic acid dehydration Organic-inorganic hybridization Organic-inorganic hybridization Pervaporation Pervaporation Polyelectrolyte complex Polyelectrolyte complex
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| GB/T 7714 | Jin, Cheng-Gang , Yin, Ming-Jie , Wu, Jia-Kai et al. Development of high-performance and robust membrane via 'hard-crosslinking-soft' technique for dehydration of acetic acid [J]. | JOURNAL OF MEMBRANE SCIENCE , 2022 , 643 . |
| MLA | Jin, Cheng-Gang et al. "Development of high-performance and robust membrane via 'hard-crosslinking-soft' technique for dehydration of acetic acid" . | JOURNAL OF MEMBRANE SCIENCE 643 (2022) . |
| APA | Jin, Cheng-Gang , Yin, Ming-Jie , Wu, Jia-Kai , Zhang, Wen-Hai , Wang, Naixin , An, Quan-Fu . Development of high-performance and robust membrane via 'hard-crosslinking-soft' technique for dehydration of acetic acid . | JOURNAL OF MEMBRANE SCIENCE , 2022 , 643 . |
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摘要 ：
In this study, a facile strategy for in situ growth of covalent triazine frameworks (CTFs) membrane on alpha-Al2O3 substrate was presented. An intact CTFs based composite membrane was obtained in a solvothermal growth process. The structure and property of the CTFs composite membranes were investigated. The results indicated that CTFs could grow in the pores of the alpha-Al2O3 substrate to modify the transport channel. Due to the sieving effect of the CTFs aperture, the prepared CTFs composite membrane exhibited superior rejection for different types of dyes (>97%) with extremely low rejection for salts (<20%). Moreover, the CTFs composite membrane had a high permeability (448 L m(-2)h(-1) MPa-1) and good stability for dye desalination. This approach demonstrated the great potential of CTFs membranes for dye/salt separation.
关键词 ：
Dye/salt separation Dye/salt separation High permeability High permeability In situ growth In situ growth Covalent triazine frameworks Covalent triazine frameworks Nanofiltration Nanofiltration
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| GB/T 7714 | Wang, Xiangqiong , Wang, Naixin , Ni, Hongxu et al. In situ growth of covalent triazine frameworks membrane on alumina substrate for dye/salt separation [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2022 , 280 . |
| MLA | Wang, Xiangqiong et al. "In situ growth of covalent triazine frameworks membrane on alumina substrate for dye/salt separation" . | SEPARATION AND PURIFICATION TECHNOLOGY 280 (2022) . |
| APA | Wang, Xiangqiong , Wang, Naixin , Ni, Hongxu , An, Quan-Fu . In situ growth of covalent triazine frameworks membrane on alumina substrate for dye/salt separation . | SEPARATION AND PURIFICATION TECHNOLOGY , 2022 , 280 . |
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