MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Peng Yan,Jucai Yang,Deyun Ma,Siyun Zhang,Shigong Zeng,Liting Feng,Sihui Zhan,Qiaquan Lin
A water-stable porous cobalt(II)–organic framework functionalized by ethoxyl groups with a chemical formula, {[Co 6 (5-EIA) 5 (tmbpy)(OH) 2 (H 2 O) 2 ]∙4(H 2 O)} n ( 1 ) (5-H 2 EIA = 5-ethoxy-isophthalic acid; tmbpy = 3,3′-dimethyl-4,4′-bipyridine) has been constructed and studied in terms of structure and performance. 1 shows a 3D framework, and has a 1D channel of 8.1 × 6.0 Å 2 along the a axis. The framework 1 exhibits high humid and thermal stability according to PXRD and TGA results. The C 2 H 2 and CO 2 uptakes of the activated 1 ( 1a ) were up to 2.07 mmol g −1 and 1.89 mmol g −1 at 273 K (100 kPa), respectively. More importantly, 1a shows excellent C 2 H 2 /CH 4 (1:1) and CO 2 /CH 4 (1:1) separations with IAST selectivity of 23.7 and 11.4 at 298 K (100 kPa), respectively. Furthermore, 1a showed good reuse performance, suggesting that 1a could be applied to the separation of C 2 H 2 /CH 4 or CO 2 /CH 4 .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Li Yin,Meiling Li,Hailun Xia,Shanshan Mao,Fangyuan Gai,Hao Wang
The gas separation performance of hybrid carbon molecular sieve membranes is critically influenced by the particle size of the fillers. Herein, ZIF-8 crystals of different sizes (≈50 nm, ≈500 nm, and ≈1 µm) are used as fillers to synthesize a series of ZIF-8-derived-carbon hybrid carbon molecular sieve membranes with high filler loading. As the ZIF-8 crystal size increases from nanoscale to microscale, the CO 2 permeability of the resulting hybrid carbon molecular sieve membrane for a CO 2 /CH 4 binary mixture increases, reaching 9965 Barrer with a selectivity of 28.05. This trend highlights a clear correlation between filler size and gas separation performance of the hybrid carbon molecular sieve membranes. Microscale ZIF-8-derived-carbon offers synergistic advantages by providing abundant hierarchical pores for molecular sieving and continuous, long pathways for efficient gas transport, while preventing particle aggregation under high loading. Our finding provides valuable insights for the further development of high-performance hybrid carbon molecular sieve membranes.
研究领域:
材料科学
·
膜分离技术
·
化学工程
·
气体分离
·
纳米材料
·
多孔材料
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yingying Cheng,Yuanye Zhuang,Shiyang Bai,Meng Ge,Jihong Sun,Jingjing Sun,Xufeng Gong
The removal of CO2 from biogas is critically important for environmental protection and energy applications yet remains technically challenging in the chemical industry. In this work, novel composite adsorbents featuring ZIF-8 uniformly dispersed on randomly oriented clinoptilolite lamellae (LCP) were designed and fabricated through a straightforward composite method. The synthesis sequentially incorporated metal precursors into LCP via ion exchange and salt addition and then introduced organic ligands to generate ZIF-8. Comprehensive characterizations, including XRD, FT-IR, N2 adsorption–desorption isotherms, SEM, and TG analyses, confirmed the physicochemical properties and structural features of the composites. The synthesized Zn-LCP/ZIF-8 materials exhibited exceptional CO2/CH4 separation performance, demonstrating ultralow CH4 adsorption capacity (<0.1 mmol/g) coupled with superior CO2/CH4 selectivity (≈28). Complementary molecular simulations using Material Studio software provided mechanistic insights into the adsorption and separation behavior, which further confirmed the superiority of the composite structure in CO2/CH4 separation. These results establish an effective strategy for biogas purification, while offering new perspectives for enhancing the CO2/CH4 adsorption selectivity.
研究领域:
环境科学
·
能源技术
·
材料科学
·
化学工程
·
吸附
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Shaocan Dong,Weiqiu Huang,Xufei Li,Xinya Wang,Baoyou Yan,Zhen Zhang,Jing Zhong
In response to global climate change, most countries have set carbon reduction targets. Mixed matrix membranes (MMMs), which combine the characteristics of inorganic nanofillers and organic matrices, have received wide attentions because of their good permeability and selective performance for the separation of CO 2 from industrial waste gases. However, the poor dispersion, compatibility and interfacial defects often lead to poor gas separation performance. In this paper, according to the dissolution-diffusion and Lewis acid-base theories, inorganic filler of amino-functionalized Bentonite (APTES-Bentonite) with -NH 2 was firstly synthesized to improve the affinity of CO 2 . Then, the dual-functionalized MMMs of APTES-Bentonite/PVDF (A-B/P MMMs) was prepared and adopted for the separation of CO 2 /CH 4 and CO 2 /N 2 , showing the increase of 87.76% and 75.31% compared to the pristine PVDF membrane, respectively. These excellent performances were attributed to the synergistic effect of APTES-Bentonite with -NH 2 groups and PVDF with -F groups, which provide a dual-functional transport pathway for CO 2 molecules due to the interactions of host-guest. Overall, the customized A-B/P MMMs offer superior CO 2 separation performance, which provides some valuable references for large-scale CO 2 capture studies.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Qilong Peng,Yu Chen,Diyi Fang,Chuanlei Liu,Kongguo Wu,Yuxiang Chen,Hao Jiang,Yuanyuan Sun,Qiumin Wu,Di Wu,Hui Sun
ETS-4 shows great potential to achieve effective separation of challenging mixtures due to its promising tunability of pores. However, the regulation of pore size is largely limited by its low thermal stability. Here, Na-ETS-4 was synthesized by the hydrothermal method and additionally modified via ion exchange coupled with thermal treatment. Structures of all synthesized samples were examined using a variety of characterization techniques. Both adsorption equilibrium and kinetics of CO2 and CH4 on these adsorbents were evaluated on custom-made adsorption units. In addition, the mechanism of CO2 adsorption on different structural models of ETS-4 was revealed via combining with the molecular dynamics (MD) simulations. Ion exchange largely improves the thermal stability of ETS-4 and its adsorption capacities for CO2 and CH4. Ba-ETS-4-350 exhibits the largest equilibrium selectivity of 12.42 and the greatest Henry’s selectivity of 2178.51. The radial distribution function (RDF) results reveal the main adsorption sites of CO2 in different ETS-4 structures.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Minmin Gou,Weifang Zhu,Yanyong Sun,Ruili Guo
Two-dimensional (2D) MOF named Cu(BPY) 2 (OTF) 2 (OTF = trifluoromethanesulfonic acid anion (CF 3 SO 3 − ), BPY = 4,4-bipyridine) possessing axial coordination anion was prepared, and then combined into Pebax® MH 1657 (Pebax) polymer to fabricate mixed matrix membranes (MMMs) for the separation of CO 2 /CH 4 gas mixtures. The inherent microporous structure and interlayer nanochannel that constructed by axial coordination anion CF 3 SO 3 − of Cu(BPY) 2 (OTF) 2 nanosheets provide selective transfer channels for CO 2 . In addition, the group that has an affinity for CO 2 , such as pyridine group and CF 3 SO 3 − anion, locating in the surface and the interlayer of Cu(BPY) 2 (OTF) 2 nanosheets, present better binding affinity and molecule selectivity for CO 2 . Owing to the synergistic effect between structure and functional groups of Cu(BPY) 2 (OTF) 2 nanosheets, the optimized CO 2 separation performance (permeability and selectivity) of the MMMs compared with that of pure Pebax were increased by 86.65% and 47.59%, respectively, under the conditions of pure gas, 0.1 MPa and 25 °C. The open narrow nanochannels and axial coordination anion in Cu(BPY) 2 (OTF) 2 nanosheet, making Cu(BPY) 2 (OTF) 2 a promising material to prepare efficient mixed matrix membrane.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Zhihao Song,Xinrui Liu,De Ao,Zhihua Qiao,Zhi Wang,Song Zhao
Metal-organic framework glass shows great promise in gas separation applications, however, its inherent low porosity poses significant challenges to achieve the enhanced membrane permeability. In this work, we developed novel self-standing crystal-glass composite membrane via melt quenching process of porous organic cages and coordination polymer glasses. The resulting (CC3) n /( a g Zn-P-dmbIm) 1-n membranes effectively combines the high porosity of CC3 with the excellent film-forming property of Zn–P-dmbIm glass, enabling efficient CO 2 /CH 4 separation. Specifically, CO 2 molecules are preferentially adsorbed into the CC3 channels, followed by rapid permeation through the membrane, while the size exclusion restricts CH 4 molecules transport through the membranes. The obtained (CC3) 0.05 /( a g Zn-P-dmbIm) 0.95 membrane achieves a high CO 2 permeability of 9358 Barrer, a CO 2 /CH 4 selectivity of 24.2, and demonstrates 24-h operational stability. This study not only broadens the application scope of coordination polymer glasses in gas separation membranes but also provides novel insights for the design of high-performance crystal-glass composite membranes.
研究领域:
材料科学
·
膜技术
·
气体分离
·
可持续能源
·
聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Ming Liu,Nan Sun,Ruohan Xu,Tallat Munir,Shiyang Bai,Jihong Sun
The surfactant involvement in hydrothermal synthesis system of clinoptilolite (CP) is an effective strategy for regulating self-assemble of the aluminosilicate species. Herein, using cetyltrimethylammonium bromide (CTAB) as surfactant, the CTAB-assisted influences on nucleation behavior of CP were demonstrated via various characterizations. Especially, small angle X-ray scattering patterns were used to investigate the fractal structural evolutions of aluminosilicate species in their sol-gel phase. The results indicated that the primary building structural units with 8- and 10-membered rings appeared in the early induced stage gradually aggregated into the worm-liked particles with the prolonged crystallization time. Among them, the nucleation process was initiated by reorganization via the solution-mediated transport and thereafter appeared the pseudo-layered structures with the core (aluminosilicate species)-shell (CTAB) features at the liquid-solid interfaces. The irregulated lamellas with the heulandite structures increased in size of around 70 nm until reaching the maximum of 90 nm, then followed the occurrences of the re-dissolving and repaid growth. Especially, the lamellar nuclei growth showed the transformations from loose mass fractals to dense surface fractals with the extensions of the induced time. In which, the interfacial solvation layer thickness increased from 1.04 to 2.87 nm for CTAB-assisted CP, thicker than that (0.63–2.08 nm) for pure-CP. These demonstrations suggested that the additive CTAB in the induced stage inhibited the agglomeration of the aluminosilicate species and following growth of the crystal nuclei via the solvated attachments pathway. Finally, using the irregulated particle as an adsorbent, the CO 2 adsorption and CO 2 /CH 4 selectivity were preliminarily explored.
研究领域:
材料科学
·
化学工程
·
物理化学
·
纳米技术
·
吸附科学
·
矿物学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Xionghui Liu,Jianfeng Du,Yu Ye,Yuchuan Liu,Shun Wang,Xianyu Meng,Xiaowei Song,Zhiqiang Liang,Wenfu Yan
Nitrogen-rich porous organic polymers have shown great potentials in gas adsorption/separation, photocatalysis , electrochemistry, sensing and so on. Herein, 1,2,3-triazole functionalized triazine-based porous organic polymers (TT-POPs) have been synthesized by the copper-catalyzed azide-alkyne cycloaddition (Cu-AAC) polymerization reactions of 1,3,5-tris(4-azidophenyl)-triazine with 1,4-diacetylene benzene and 1,3,5-triacetylenebenzene, respectively. The characterizations of N 2 adsorption at 77 K show TT-POPs possess permanent porosity with BET surface areas of 666 m 2 ·g −1 (TT-POP-1) and 406 m 2 ·g −1 (TT-POP-2). The adsorption capacities of TT-POPs for CO 2 , CH 4 , C 2 H 2 and C 2 H 4 , as well as the selective separation abilities of CO 2 /N 2 , CO 2 /CH 4 , C 2 H 2 /CH 4 and C 2 H 4 /CH 4 were evaluated. The gas selective separation ratio of TT-POPs was calculated by the ideal adsorbed solution theory (IAST) method, wherein the selective separation ratios of C 2 H 2 /CH 4 and C 2 H 4 /CH 4 of TT-POP-2 was 48.4 and 13.6 (298 K, 0.1 MPa), which is comparable to other adsorbents (5.6–120.6 for C 2 H 2 /CH 4 , 10–26 for C 2 H 4 /CH 4 ). This work shows that the 1,2,3-triazole functionalized triazine-based porous organic polymer has a good application prospect in natural gas purification.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Shahid Hussain,Haifeng Dong,Yanqiang Zhang,Guoxiong Zhan,Shaojuan Zeng,Huifang Duan,Xiangping Zhang
The efficient capture of carbon dioxide (CO2) has industrial, economic, and environmental significance. Here, CO2 capture performance in terms of CO2/CH4 selectivity for the zeolitic imidazolate framework (ZIF-8) is enhanced by impregnation of 1-n-butyl-3-methylimidazolium dicyanide [BMIM][DCA]. The preparation of ionic liquids (ILs)/ZIF-8 composites, their comprehensive characterization, and the impact of IL impregnation are all investigated. The crystal structure and morphology of ZIF-8 remained intact even after the impregnation of ILs, according to X-ray diffraction and scanning electron microscopy studies. The infrared spectroscopy known as Fourier transform infrared spectroscopy determines the interaction between ILs and ZIF-8 in the composite. The isotherm fitting was also performed by dual site Langmuir models, which showed good agreement with the experimental results. The CO2/CH4 selectivity results demonstrated that the ideal selectivity for the IL-impregnated ZIF-8 composite has five times higher selectivity than pristine ZIF-8 at 0.05 bar which is the highest reported selectivity. The normalized selectivity of this type of IL/ZIF-8 composite is also higher. This study suggested that the IL/MOF composite with a tunable structure have a strong potential for enhanced acid gas separation performance to meet the environmental challenges.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2017
·
IF 6.035
Ning Zhang,Dongdong Peng,Hong Wu,Yanxiong Ren,Leixin Yang,Xingyu Wu,Yingzhen Wu,Zihan Qu,Zhongyi Jiang,Xingzhong Cao
For high-performance hybrid membranes, it is crucial to design multi-functional filler to rationally manipulate the structure-property relationship. In this study, a novel kind of hybrid membrane was fabricated by incorporating zinc ion loaded sulfonated pitch (SP-Zn 2+ ) nanofillers into poly (ether-block-amide) (Pebax) matrix for CO 2 /CH 4 separation. Sulfonated pitch (SP) with high sulfonate content was functionalized by zinc ion (Zn 2+ ) via complexation reaction to synthesize SP-Zn 2+ nanofillers with high Zn 2+ loading. Mixed gas separation performances of membranes with different SP-Zn 2+ loading were conducted. Meanwhile, the effect of operating pressure on separation performance and long-term operation stability were investigated. The hybrid membranes displayed significantly enhanced permeability and CO 2 /CH 4 selectivity. First, the hydrophilic sulfonate group in SP had good compatibility with Pebax matrix and effectively suppressed interfacial defects. Second, zinc ions and sulfonate group could form zinc-sulfonate complex network. The sulfonated moiety afforded strong affinity toward CO 2 due to multiple interactions whereas the Zn 2+ moiety afforded a transport highway for CO 2 . Third, the incorporation of SP-Zn 2+ nanofillers could disturb the Pebax chain packing and optimize the free volume characteristics. Particularly, Pebax/SP-Zn 2+ (2) membrane exhibited an increment of 104% and 70.2% in CO 2 permeability and CO 2 /CH 4 selectivity respectively, much higher than that of Pebax membrane.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yueyao Liang,Ruquan Zhang,Zhihua Qiao,Chongli Zhong
Supported metal–organic framework (MOF) membranes are promising candidates for energy-efficient natural gas purification, but the preparation of ultrathin MOF membranes supported by polymer substrates remains challenging. Herein, we proposed a polymer collaboration method for preparing ultrathin two-dimensional MOF membranes on polymer support layers. Cu(II) meso-tetra (4-carboxyphenyl) porphyrin (CuTCPP) membranes having thicknesses as low as <10 nm were formed in situ because of the high density of heterogeneous nucleation sites in a polyvinyl alcohol-Cu 2+ interface layer and the controlled anisotropic growth of nanocrystals enabled by a polyvinylpyrrolidone (PVP) surfactant. The prepared CuTCPP membranes showed excellent CO 2 /CH 4 separation performance, yielding a high permeance of 4560 GPU and a moderate selectivity of 31.8. Furthermore, the prepared CuTCPP membranes also displayed good CO 2 /N 2 separation performance, having a CO 2 permeance of 3200 GPU and a CO 2 /N 2 selectivity of 36. The thickness of CuTCPP membranes can be controlled by varying the concentration of metal ions in the organic interface layer. This preparation method can not only fix the active sites for membrane formation but also control the morphology of crystal growth and is applicable to membrane fabrication using other porous MOFs.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）