JOURNAL OF MEMBRANE SCIENCE
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2020
·
IF 7.183
Rong Rong,Yanwei Sun,Taotao Ji,Yi Liu
Zirconium-based MOF (Zr-MOF) membranes have attracted widespread attention due to their highly tailorable pore aperture and adsorption behavior achieved by functional group decoration and ligand/cluster-missing defect regulation as well as extraordinary chemical/thermal stability. Nevertheless, it has remained a great challenge to further improve the separation performance of Zr-MOF membranes due to very limited available zirconium sources and heating modes. In this study, we prepared polycrystalline UiO-66 membranes exhibiting unprecedented CO 2 /N 2 selectivity (31.3). The use of layered ZrS 2 , a representative of transition-metal dichalcogenides (TMDCs), as zirconium source during tertiary solvothermal growth was found to be indispensable for improving the separation performance of UiO-66 membranes. As far as we know, the CO 2 /N 2 selectivity reported in this study was the highest among all pristine polycrystalline MOF membranes measured under ambient conditions. More importantly, our study highlighted the importance of concurrent metal source and fabrication process innovation in performance enhancement of polycrystalline MOF membranes.
研究领域:
材料科学
·
化学工程
·
膜技术
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DOI
高影响因子
POLYMER SCIENCE SERIES A
·
2018
·Vol. 60
·期 5
·612-617
·
IF 0.729
Wang Jinjing,Wang Huifeng,Li Yan,Tian Li,Chen Shanmin,Liu Qiang,Guo Zhen
A novel copolymer surfactant has been prepared via a free radical copolymerization of CO 2 -switchable monomer N , N -diethylaminoethyl methacrylate and the hydrophilic monomer sodium vinyl-sulfonate and characterized. The results of conductivity, dynamic light scattering and cryogenic transmission electron microscopy study showed the change of the microstructure of copolymer in water by adding or removing of CO 2 . The copolymer aqueous solution was found to exhibit reversible switchability by the bubbling of CO 2 /N 2 .
研究领域:
高分子化学
·
材料科学
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DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Cong Jiang,Zong Meng
The development of green and efficient catalytic systems is crucial for sustainable chemical processes. This study engineered shellac nanoparticle-lipase conjugates for biphasic biocatalysis. Taking advantage of the inherent amphiphilicity and pH-triggered interfacial behavior of the shellac, the conjugates exhibited dual functionality as intelligent Pickering emulsifiers and interfacial biocatalysts. The covalent conjugation strategy achieved a protein loading capacity of 107.97 ± 5.24 mg/g under optimized conditions while preserving interfacial responsiveness. Reversible emulsification/breaking transitions were precisely regulated at least 30 times through pH adjustment or alternating CO₂/N₂ treatments, enabling convenient catalyst recovery. When applied to the esterification of phytosterols with oleic acid, the conjugates exhibited a higher esterification rate (78.93 %, 1.5-fold enhancement compared with the free lipase), retained 85.0 % initial catalytic activity after six consecutive cycles. The responsive Pickering system combined exceptional recyclability and enhanced catalytic performance, providing an innovative pathway for the development of Pickering interfacial catalysis.
研究领域:
绿色化学
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生物催化
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纳米技术
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胶体与界面科学
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酶工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2025
·
IF 4.5
Shuang Wang,Dudu Li,Zelong Xu,Fan Zhou,Zhihua Qiao,Zibo Yang,Zhi Wang
Coordination polymer (CP) glasses offer high processability and permanent accessible pores, having promising potential in gas separation. However, their low porosity makes it difficult to prepare high-performance gas separation membranes. In this work, we combined the advantages of CP glasses and inorganic fillers, and selected ag Zn-P-dmbIm as the continuous phase and hydroxylated multi-walled carbon nanotubes (HMWCNTs) as the dispersed phase to prepare HMWCNTs/ ag Zn-P-dmbIm mixed matrix membranes (MMMs). The very favorable interfacial compatibility and excellent CO 2 /N 2 gas separation performance of the MMM-2 membrane were demonstrated by a series of characterizations. The test results revealed that the CO 2 permeability and ideal CO 2 /N 2 selectivity of MMM-2 membrane were 9776.8 Barrer and 31.1, respectively, which exceeded the Robeson 2019 upper bound. In addition, the well-defined long-term stability of the MMM-2 membrane lays the foundation for realizing gas separation membranes for industrial applications in practice. This provides a strategy for the subsequent preparation of CP glasses-based MMMs.
研究领域:
材料科学
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膜技术
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气体分离
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高分子化学
·
纳米复合材料
✓ 已验证
产品关联
DOI
高影响因子
Green Chemical Engineering
·
2021
·
IF 0
Qingping Xin,Xueting Cao,Dandan Huang,Shuo Li,Xinghui Zhang,Guangyu Xuan,Mengting Wei,Lei Zhang,Xiaoli Ding,Yuzhong Zhang
One type of new light-responsive hierarchical metal organic framework (MOF) has been successfully prepared using Co(NO 3 ) 3 ·6H 2 O as the metal salt and 4,4′-azobenzenedicarboxylic acid as the ligand by microwave method for the first time. It is found that MOF [Co(AzDC)] exhibits a light-responsive characteristic to SO 2 adsorption due to the presence of azo group from the ligand. The light-responsive hierarchical MOFs are incorporated into Matrimid® 5218 (PI) matrix to prepare mixed matrix membranes (MMMs) for gas separation application. The morphology, crystallinity, chain mobility and thermal stability of MMMs are explored. Results show that Co(AzDC) may elevate both the CO 2 (SO 2 ) permeability and CO 2 (SO 2 )/N 2 selectivity of the MMMs. In particular, the Co(AzDC) doped MMMs exhibit the significantly improved CO 2 (SO 2 )/N 2 selectivity from 33 (123) for PI control membrane to 78 (420) for MMMs, overcoming the 2008 Robeson upper bound for CO 2 /N 2 system. Size-sieving effect of Co(AzDC) with pore size 0.35 nm enhances the selectivity, while the –N=N– group from Co(AzDC) shows affinity to CO 2 molecular rather than N 2 , also elevating selectivity of MMMs. In brief, enhanced selectivity of high-performance membrane is attributed to incorporation of Co(AzDC) particles, which displays synergistic effects both in size-sieving and CO 2 -philic interaction for CO 2 /N 2 separation. Smart highly selective interface is constructed in MMMs by switching the configuration of MOFs from cis to trans . The SO 2 permeability and SO 2 /N 2 selectivity of MMMs are investigated under both visible light and ultraviolet light states, and the SO 2 /N 2 separation performance under visible light is notably improved in comparison with that under ultraviolet light state.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wenhan Wang,Wenqiang Li,Zijian Wang,Bo Liu,Bing Wang,Jingui Duan,Rongfei Zhou
Carbon dioxide capture is an effective method to mitigate climate change . Highly CO 2 -selective and highly moisture-resistant absorbent is essential for energy-efficient carbon capture by absorption. Herein, a highly CO 2 -selective and high-silica CHA zeolite in a pure lithium form (Li-SSZ-13) was synthesized using a direct synthesis method for the first time. The effects of gel n (SiO 2 )/ n (Al 2 O 3 ) ratio, gel n (SiO 2 )/ n (Li 2 O) ratio and synthesis time on the crystallinity , yield, micropore volume and CO 2 loading of the crystals were systematically investigated. The adsorption isotherms of CO 2 and N 2 were measured for directly synthesized Li-SSZ-13, conventional Na-SSZ-13 and ion-exchanged Li-Na-SSZ-13 zeolites. The dynamic breakthrough adsorption properties were measured for Li-SSZ-13 in comparison with Na-SSZ-13 and Li-Na-SSZ-13. The obtained Li-SSZ-13 exhibited a high CO 2 adsorption capacity of 4.48 mmol/g and a high CO 2 /N 2 IAST selectivity of 310 at 100 kPa and 273 K, which were 45.0 % and 441 % higher than Na-SSZ-13 zeolite, 24.8 % and 179 % higher than Li-Na-SSZ-13 zeolite, respectively. It suggests that directly synthesized Li-SSZ-13 zeolite has great potential for efficient CO 2 capture from flue gas .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Juanjuan Dai,Danyan Xie,Ying Liu,Zhiguo Zhang,Yiwen Yang,Qiwei Yang,Qilong Ren,Zongbi Bao
Supramolecular metal–organic frameworks (SMOFs) are emerging as a new family of porous materials. In this work, a SMOF, [Cu2(ade)4(H2O)2](SiF6)2 (SMOF-SIFSIX-1, ade = adenine) was successfully synthesized from the cationic complex of copper and adenine and hexafluorosilicate anions by a slow diffusion method and was demonstrated for trapping carbon dioxide in preference to methane and nitrogen. With one-dimensional pores of about 3.6 × 3.6 Å to induce their distinguishing interactions with the three components, SMOF-SIFSIX-1 exhibited excellent selective gas sorption behaviors for CO2/CH4 (50:50) and CO2/N2 (15:85) gas mixtures with ideal adsorbed solution theory selectivities of 21.1 and 131.7 at 273 K and 100 kPa pressure, respectively, outperforming most of reported hydrogen-bonded organic frameworks so far. Neutron powder diffraction and DFT-D calculations were also carried out to investigate the CO2 adsorption configuration on SMOF-SIFSIX-1a, which suggested that this framework catch CO2 due to “C···F” and “O···H” supramolecular interactions between CO2 molecules and SMOF-SIFSIX-1a. This study demonstrates that the rarely studied SMOF material shows promising potential in gas adsorption separation.
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2020
·
IF 3.693
Lai Nanjun,Zhu Qingru,Qiao Dongyu,Chen Ke,Wang Dongdong,Tang Lei,Chen Gang
During CO2 flooding, serious gas channeling occurs in ultra-low permeability reservoirs due to the high mobility of CO2. The chief end of this work was to research the application of responsive nanoparticles for mobility control to enhance oil recovery. Responsive nanoparticles were developed based on the modification of nano-silica (SiO2) by 3-aminopropyltrimethoxysilane (KH540) via the Eschweiler-Clark reaction. The proof of concept for responsive nanoparticles was investigated by FT-IR, 1H-NMR, TEM, DLS, CO2/N2 response, wettability, plugging performance, and core flooding experiments. The results indicated that responsive nanoparticles exhibited a good response to control nanoparticle dispersity due to electrostatic interaction. Subsequently, responsive nanoparticles showed a better plugging capacity of 93.3% to control CO2 mobility, and more than 26% of the original oil was recovered. Moreover, the proposed responsive nanoparticles could revert oil-wet surfaces to water-wet, depending on surface adsorption to remove the oil from the surface of the rocks. The results of this work indicated that responsive nanoparticles might have potential applications for improved oil recovery in ultra-low permeability reservoirs.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yonghong Wang,Zhuo Jin,Xinru Zhang,Jinping Li
The incorporation of lamellar materials into polymer matrix can improve the gas separation performance of mixed matrix membranes (MMMs), which have great potential in chemical separation process. However, few intrinsic selectivity sites on MoS 2 sheets suppress further employment in the membrane separation. In this work, the vacancies and defects-containing MoS 2 sheets were prepared by high temperature oxidation and hydrothermal reaction in NaOH solution, and then L-cysteine-functionalized MoS 2 (Cys-MoS 2 ) was synthesized by a thiol-click chemistry reaction between S vacancies and thiol groups as confirmed by transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and N 2 absorption. After blending with polyether-block-amide (Pebax), the as-prepared MMMs showed outstanding mechanical properties as a result of the homogeneous dispersion of Cys-MoS 2 and hydrogen bonding between two phases as evidenced by attenuated total reflectance-FTIR, scanning electron microscope (SEM), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The highest permeability of 297 Barrer accompanied with a CO 2 /N 2 selectivity of 120 was obtained for MMMs loaded with 1.5 wt% Cys-MoS 2 , which were enhanced by 206.2 % and 124.7 % over the pristine Pebax membrane, respectively. Meanwhile, this value was superior to that of the previously reported Pebax-based MMMs, transcending 2019 upper bound. The enhanced gas separation performance is due to the improved CO 2 adsorption selectivity by the vacancies and defects of Cys-MoS 2 , while the amine groups carrier enhanced CO 2 reactivity selectivity.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2011
·
IF 3.673
Shuangjie Yuan,Zhi Wang,Zhihua Qiao,Mingming Wang,Jixiao Wang,Shichang Wang
In this work, the idea of modifying the fixed carrier membrane for CO 2 separation by a cross-linking agent containing carriers to simultaneously improve the CO 2 -induced plasticization resistance, the CO 2 permeance and the CO 2 /N 2 selectivity of the membrane was suggested and confirmed. Polyvinylamine (PVAm), a polymer to prepare fixed carrier membrane for CO 2 separation, was synthesized by partial acidic hydrolysis of poly(N-vinylformamide) and further modified by using ethylenediamine (EDA). Elemental analysis, ATR-FTIR, XPS and XRD were employed to characterize the EDA modified PVAm. The result of ATR-FTIR and XPS showed that the EDA can effectively cross-link PVAm by the hydrogen bonds formed between amine groups of EDA and either amine or amide groups in PVAm. The composite membranes were developed by coating the PVAm–EDA mixed solutions with different mass ratio of EDA/PVAm ( m EDA / m PVAm ) on polysulfone (PS) ultrafiltration membrane. The effects of m EDA / m PVAm in coating solution and wet coating thickness on the gas performance of the PVAm–EDA/PS composite membranes were investigated. The PVAm–EDA/PS membrane prepared by using coating solution with proper m EDA / m PVAm (from 1 to 3) showed higher CO 2 permeance and much higher CO 2 /N 2 selectivity as well as better CO 2 -induced plasticization resistance than that of the PVAm/PS membrane. It is attributed to two factors: (1) the densification of polymer matrix by moderate hydrogen bond cross-linking; and (2) the increase of total carrier content in membrane. As CO 2 -induced plasticization resistance improves, the selective layer thickness of the PVAm–EDA/PS membrane can be further reduced to obtain a higher CO 2 permeance and a proper CO 2 /N 2 selectivity simultaneously. For CO 2 /N 2 gas mixture (20/80 by volume), the PVAm–EDA/PS membrane prepared by using coating solution with m EDA / m PVAm of 3 and 50 μm wet coating thickness displayed a CO 2 permeance of 607 GPU and CO 2 /N 2 selectivity of 106 at CO 2 partial pressure of 0.02 MPa. The separation performance stability of the PVAm–EDA/PS membranes was investigated for 300 h and no deterioration in membrane permselectivity was observed. Moreover, the PVAm–EDA/PS membrane had no obvious degradation after exposure to H 2 O-saturated SO 2 of 300,000 ppm h.
研究领域:
高分子科学
·
气体分离
·
膜技术
·
材料化学
·
环境工程
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
·
2012
·Vol. 59
·期 1
·215-228
·
IF 2.261
Zhihua Qiao,Zhi Wang,Chenxin Zhang,Shuangjie Yuan,Yaqun Zhu,Jixiao Wang,Shichang Wang
Polyvinylamine (PVAm) was modified using a cross-linking agent containing carriers piperazine (PIP). Attenuated total reflectance fourier transform infrared, elemental analyzer, and X-ray diffraction were used to characterize the PIP-modified PVAm. The PVAm–PIP/polysulfone (PS) composite membrane was developed by coating PVAm–PIP mixed solutions with different mass ratios of PIP/PVAm (m PIP /m PVAm ) on the PS ultrafiltration membrane. The effects of m PIP /m PVAm (from 0.715 to 2.860) in the coating solutions and wet coating thickness on the gas performance of the PVAm–PIP/PS composite membrane were investigated. The PVAm–PIP/PS composite membrane prepared showed higher performance than other membranes reported in the literature due to the large increase of the introducing carrier concentration and low crystallinity. Moreover, the separation performance stability of the PVAm–PIP/PS composite membrane was investigated and no deterioration in the membrane permselectivity was observed. Finally, the economic evaluation of the membrane with the highest performance prepared was carried out. © 2012 American Institute of Chemical Engineers AIChE J, 59: 215–228, 2013
研究领域:
材料科学
·
化学工程
·
气体分离膜
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Heyang Liu,Shichen Zeng,Zhenyang Li,Da Zhang,Xu Liang,Hanze Ma,Jianyu Wang,Qianfeng Pan,Jinyue Wang,Jingqi Fu,Guangwei He,Zhongyi Jiang
Covalent organic framework (COF) materials exhibit considerable potential for membrane separation applications due to their long-range ordered pore structures, tunable pore chemical microenvironments, and excellent thermochemical stability. However, the intrinsic pore sizes of COF materials often exceed the kinetic diameters of target gas molecules, thereby limiting their efficacy in gas separation. In this study, we present a strategy for the functionalization of ionic COF nanosheets using ionic liquids. The immobilization of ionic liquids within the pores and interlayers of ionic COF nanosheets was accomplished through a straightforward physical blending method, which leverages the electrostatic interactions between the abundant charged groups from the ionic COF nanosheets and the ionic liquids. Subsequently, we prepared CO 2 separation membranes with a thickness of less than 100 nm. The resulting COF membranes demonstrated excellent separation performance with a CO 2 permeance of up to 1116 GPU and a CO 2 /N 2 selectivity of 20.3 as well as good stability. This study offers a simple and effective approach for developing high-performance COF membranes for carbon capture.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）