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摘要 ：
Given the promise of energy efficiency, metal -organic frameworks (MOFs) for separation applications have made significant progress through fine-tuning of their pore size and environment. An emerging focus in the field is the one-step separation of multicomponent gas mixtures. Compared with binary mixture separation, multicomponent gas mixtures are more relevant to industrial demand and their separation is more challenging. In this review, the unique features of multicomponent mixture separation are analyzed and new strategies for such a challenging task critically discussed. The separation mechanisms are discussed from a molecular level to provide insights for MOF design. To conclude, fundamental questions for performance optimization have been proposed.
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| GB/T 7714 | Zhang, Xin , Li, Yi , Li, Jian-Rong . Metal-organic frameworks for multicomponent gas separation [J]. | TRENDS IN CHEMISTRY , 2024 , 6 (1) : 22-36 . |
| MLA | Zhang, Xin 等. "Metal-organic frameworks for multicomponent gas separation" . | TRENDS IN CHEMISTRY 6 . 1 (2024) : 22-36 . |
| APA | Zhang, Xin , Li, Yi , Li, Jian-Rong . Metal-organic frameworks for multicomponent gas separation . | TRENDS IN CHEMISTRY , 2024 , 6 (1) , 22-36 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Global warming has become a growing concern over decades, prompting numerous research endeavours to reduce the carbon dioxide (CO2) emission, the major greenhouse gas (GHG). However, the contribution of other non-CO2 GHGs including methane (CH4), nitrous oxide (N2O), fluorocarbons, perfluorinated gases, etc. should not be overlooked, due to their high global warming potential and environmental hazards. In order to reduce the emission of non-CO2 GHGs, advanced separation technologies with high efficiency and low energy consumption such as adsorptive separation or membrane separation are highly desirable. Advanced porous materials (APMs) including metal-organic frameworks (MOFs), covalent organic frameworks (COFs), hydrogen-bonded organic frameworks (HOFs), porous organic polymers (POPs), etc. have been developed to boost the adsorptive and membrane separation, due to their tunable pore structure and surface functionality. This review summarizes the progress of APM adsorbents and membranes for non-CO2 GHG separation. The material design and fabrication strategies, along with the molecular-level separation mechanisms are discussed. Besides, the state-of-the-art separation performance and challenges of various APM materials towards each type of non-CO2 GHG are analyzed, offering insightful guidance for future research. Moreover, practical industrial challenges and opportunities from the aspect of engineering are also discussed, to facilitate the industrial implementation of APMs for non-CO2 GHG separation.
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| GB/T 7714 | Zhao, Yan-Long , Zhang, Xin , Li, Mu-Zi et al. Non-CO2 greenhouse gas separation using advanced porous materials [J]. | CHEMICAL SOCIETY REVIEWS , 2024 , 53 (4) : 2056-2098 . |
| MLA | Zhao, Yan-Long et al. "Non-CO2 greenhouse gas separation using advanced porous materials" . | CHEMICAL SOCIETY REVIEWS 53 . 4 (2024) : 2056-2098 . |
| APA | Zhao, Yan-Long , Zhang, Xin , Li, Mu-Zi , Li, Jian-Rong . Non-CO2 greenhouse gas separation using advanced porous materials . | CHEMICAL SOCIETY REVIEWS , 2024 , 53 (4) , 2056-2098 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Modulating the pore chemistry and introducing ideal binding sites in MOFs to achieve one-step purification of C2H4 from ternary C2H2/C2H4/C2H6 mixture is promising but challenging. Herein, we report a post-synthetic fluorinated anions exchange strategy to access C2H4 adsorbents from a stable metal-organic framework (MOF) Fe-BDC-TPT-Cl of the acs topology (H2BDC=terephthalic acid; TPT=2,4,6-tri(4-pyridyl)-1,3,5-triazine). Introduction of BF4- and SiF62- anions gave rise to two new MOFs, Fe-BDC-TPT-BF4 and Fe-BDC-TPT-SiF6 with retained topology but different pore chemistry. Fe-BDC-TPT-BF4 exhibits the highest C2H2 uptake of 210.1 cm(3) g(-1) at 298 K and 100 kPa among porous adsorbents reported by now. Strong BF4-/SiF62-& mldr;HC affinity enhances host-guest interaction, enabling high separation potential (Delta Q) for C2H2/C2H4 and C2H6/C2H4. Both static sorption isotherms and dynamic breakthrough experiments revealed good performance of Fe-BDC-TPT-BF4 and Fe-BDC-TPT-SiF6 for the C2H2/C2H4/C2H6 separation. The productivity of C2H4 (purity > 99.95 %) recovered from (1/92/7) C2H2/C2H4/C2H6 over Fe-BDC-TPT-SiF6 outperforms that of Fe-BDC-TPT-Cl by more than two times. This work demonstrates that fluorinated anions exchange is an efficient strategy to regulate the pore chemistry of MOF adsorbents for one-step purification of C2H4.
关键词 ：
Separation potential Separation potential Ion exchange Ion exchange Metal-organic frameworks Metal-organic frameworks C(2)H(4 )purification C(2)H(4 )purification Pore chemistry Pore chemistry
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| GB/T 7714 | Li, Muzi , Zhang, Xin , He, Tao et al. Modulation of pore chemistry through fluorinated anions exchange in a metal-organic framework for C2H4 purification [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2024 , 355 . |
| MLA | Li, Muzi et al. "Modulation of pore chemistry through fluorinated anions exchange in a metal-organic framework for C2H4 purification" . | SEPARATION AND PURIFICATION TECHNOLOGY 355 (2024) . |
| APA | Li, Muzi , Zhang, Xin , He, Tao , Kong, Xiang-Jing , Chen, Qiancheng , Li, Jian-Rong . Modulation of pore chemistry through fluorinated anions exchange in a metal-organic framework for C2H4 purification . | SEPARATION AND PURIFICATION TECHNOLOGY , 2024 , 355 . |
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摘要 ：
The emission of volatile organic compounds (VOCs) significantly contributes to air pollution and poses a serious threat to human health. Benzene, one of the most toxic VOCs, is difficult for the human body to metabolize and is classified as a Group 1 carcinogen. The development of efficient adsorbents for removing trace amounts of benzene from ambient air is thus of great importance. In this work, we studied the benzene adsorption properties of four Zr-based metal-organic frameworks (Zr-MOFs) through static volumetric and dynamic breakthrough experiments. Two previously reported Zr-MOFs, BUT-12 and STA-26, were prepared with a tritopic carboxylic acid ligand (H3L1) functionalized with three methyl groups, and STA-26 is a 2-fold interpenetrated network of BUT-12. Two new isoreticular Zr-MOFs, BUT-12-Et and STA-26-Et, were synthesized using a similar ligand, H3L2, where the methyl groups are replaced with ethyl groups. There are mesopores in BUT-12 and BUT-12-Et and micropores in STA-26 and STA-26-Et. The four Zr-MOFs all showed high stability in liquid water and acidic aqueous solutions. The microporous STA-26 and STA-26-Et showed much higher benzene uptakes than mesoporous BUT-12 and BUT-12-Et at room temperature under low pressures. Particularly, the benzene adsorption capacity of STA-26-Et was high up to 2.21 mmol/g at P/P-0 = 0.001 (P-0 = 12.78 kPa), higher than those of the other three Zr-MOFs and most reported solid adsorbents. Breakthrough experiments confirmed that STA-26-Et could effectively capture trace benzene (10 ppm) from dry air; however, its benzene capture capacity was reduced by 90% under humid conditions (RH = 50%). Coating of the crystals of STA-26-Et with polydimethylsiloxane (PDMS) increased the hydrophobicity of the exterior MOF surfaces, leading to a more than 2-fold improvement in its benzene capture capacity in the breakthrough experiment under humid condition. PDMS coating of STA-26-Et likely slowed down the water adsorption process, and thus, the adsorbent afforded more efficient capture of benzene. This work demonstrates that modifying both the interior and exterior surfaces of MOFs can effectively enhance their performance in capturing trace benzene from ambient air, even under humid conditions. This finding is meaningful for the development of new adsorbents for effective air purification applications.
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| GB/T 7714 | Lv, Jia-Ao , Tang, Zhen-Ling , Liu, Yu-Hui et al. Interior and Exterior Surface Modification of Zr-Based Metal-Organic Frameworks for Trace Benzene Removal [J]. | INORGANIC CHEMISTRY , 2024 , 63 (9) : 4249-4259 . |
| MLA | Lv, Jia-Ao et al. "Interior and Exterior Surface Modification of Zr-Based Metal-Organic Frameworks for Trace Benzene Removal" . | INORGANIC CHEMISTRY 63 . 9 (2024) : 4249-4259 . |
| APA | Lv, Jia-Ao , Tang, Zhen-Ling , Liu, Yu-Hui , Zhao, Rui-Chao , Xie, Lin-Hua , Liu, Xiao-Min et al. Interior and Exterior Surface Modification of Zr-Based Metal-Organic Frameworks for Trace Benzene Removal . | INORGANIC CHEMISTRY , 2024 , 63 (9) , 4249-4259 . |
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摘要 ：
As a unique subclass of metal-organic frameworks (MOFs), MOFs with open metal site (OMS) are demonstrated efficient gas separation performance through pi complexation with unsaturated hydrocarbons. However, their practical application faces the challenge of humidity that causes structure degradation and completive binding at the OMS. In this work, the effect of linker methylation of a copper MOF (BUT-155) on the C2H2/CO2 separation performance under humid condition is evaluated. The water adsorption isotherm, adsorption kinetics, and breakthrough under dry and humid conditions are performed. The BUT-155 with methylated linker exhibits lower water uptake and adsorption kinetics under humid condition (RH = 20%), in comparison with HKUST-1. Therefore, the C2H2/CO2 separation performance of BUT-155 is much less affected by water, especially under higher gas flow rate. Moreover, the dynamic C2H2/CO2 separation performance of BUT-155 can maintain five breakthrough cycles under humid conditions (RH = 20% and RH = 80%) without obvious performance degradation.
关键词 ：
open metal site open metal site metal-organic frameworks metal-organic frameworks separation separation humidity humidity linker alkylation linker alkylation
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| GB/T 7714 | Zhao, Yan-Long , Chen, Qiancheng , Zhang, Xin et al. Enabling C2H2/CO2 Separation Under Humid Conditions with a Methylated Copper MOF [J]. | ADVANCED SCIENCE , 2024 , 11 (17) . |
| MLA | Zhao, Yan-Long et al. "Enabling C2H2/CO2 Separation Under Humid Conditions with a Methylated Copper MOF" . | ADVANCED SCIENCE 11 . 17 (2024) . |
| APA | Zhao, Yan-Long , Chen, Qiancheng , Zhang, Xin , Li, Jian-Rong . Enabling C2H2/CO2 Separation Under Humid Conditions with a Methylated Copper MOF . | ADVANCED SCIENCE , 2024 , 11 (17) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
MOF-on-MOF composites are deemed promising candidates to accomplish synergistic CO2 capture and photoreduction thanks to their plentiful active sites, extended light response range, timely separation of photoexcited electron-hole pairs, and large CO2 adsorption capacities. Unfortunately, the controllable growth of the designed MOF-on-MOF heterostructure is challenging. Deficient interphase contact and the consequent mass transfer deprivation is one of the primary obstacles severely impairing the catalytic efficiency. Herein, the contact between two widely-employed MOFs of Ni-BDC and NH2-MIL-125 was significantly strengthened by exploiting a self-assembled array of Ni-BDC microsheets. In contrast to the spontaneously formed spheroidal aggregate, the loosely-packed array exhibits amplified accessible surfaces to interact with NH2-MIL-125, contributing to a radically improved interfacial built-in electric field and 7 similar to 9 times rises in the product yields. Moreover, the preferably thin thickness of Ni-BDC microsheets prompts its macroscopic flexibility, permitting intensified deformation for enhanced interphase contact. Coupled with the additional contribution from its copious Lewis acid sites, the developed NH2-MIL-125@Ni-BDC array simultaneously converted CO2 into CO and CH4 at rates that cannot be matched by its isostructural Co counterpart with declined acidity and flexibility. This work innovatively reveals the immense importance of morphology tailoring and assembly tactic to interphase contact modulation and the upgrade of catalyst performances.
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| GB/T 7714 | He, Bing , Wang, Ying-Jie , Bai, Xuefeng et al. Rational construction of MOF-on-MOF heterojunction with an array of flexible two-dimensional microsheets for efficient CO2 photoreduction [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 482 . |
| MLA | He, Bing et al. "Rational construction of MOF-on-MOF heterojunction with an array of flexible two-dimensional microsheets for efficient CO2 photoreduction" . | CHEMICAL ENGINEERING JOURNAL 482 (2024) . |
| APA | He, Bing , Wang, Ying-Jie , Bai, Xuefeng , Bian, He , Xie, Yabo , Li, Rui et al. Rational construction of MOF-on-MOF heterojunction with an array of flexible two-dimensional microsheets for efficient CO2 photoreduction . | CHEMICAL ENGINEERING JOURNAL , 2024 , 482 . |
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摘要 ：
Adsorption -based C2H2 purification is a promising technology in the petrochemical industry, but the seeking or design of suitable adsorbents faces the challenge of merging excellent separation properties with other implementable advantages. Here, we reported a cost-effective and easily scalable metal-organic framework (MOF), BUT-316-a (BUT = Beijing University of Technology), with unprecedented local-molecule-trap (LMT) for the preferential adsorption of C2H2 over CO2. Attributed to the existence of the LMT, high density of open metal sites (OMSs), and microporous pore structure, BUT-316-a combines high uptake (117.6 cm3 cm -3) and packing density of C2H2 (0.36 g mL-1), coupled with good C2H2/CO2 selectivity (17.2). The practical separation performance of BUT-316-a toward C2H2/CO2 mixture and the associated host-guest interactions within the LMT were further unveiled by dynamic breakthrough experiments and theoretical calculations, respectively. This study may provide valuable insights into designing more advanced adsorbents with an optimal binding environment for gas separation.
关键词 ：
Acetylene purification Acetylene purification Metal-organic framework Metal-organic framework Adsorptive separation Adsorptive separation Local-molecule trap Local-molecule trap
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| GB/T 7714 | Wu, Xue-Qian , He, Tao , Zhang, Peng -Dan et al. Introducing local-molecule trap in a cost-effective metal-organic framework for C2H2/CO2 separation [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 482 . |
| MLA | Wu, Xue-Qian et al. "Introducing local-molecule trap in a cost-effective metal-organic framework for C2H2/CO2 separation" . | CHEMICAL ENGINEERING JOURNAL 482 (2024) . |
| APA | Wu, Xue-Qian , He, Tao , Zhang, Peng -Dan , Yu, Jiamei , Li, Jian-Rong . Introducing local-molecule trap in a cost-effective metal-organic framework for C2H2/CO2 separation . | CHEMICAL ENGINEERING JOURNAL , 2024 , 482 . |
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摘要 ：
Atmospheric ozone (O-3) has long been a threat to human health, however, rational design of dual-function materials for straightforward sensing and removal of trace O-3 in the environment (air, water, etc.) remains challenging. Herein, we present a highly stable and hydrophobic two-dimensional Mn(II)-based metal-organic framework (denoted as BUT-82), which shows distinctive color change on exposure to O-3 in air or in liquid water due to the oxidation of Mn2+. The O-3 concentration could be quantified by analyzing the color changes of BUT-82 using UV/Vis spectroscopy or more facilely using smartphone photography, and the limits of detection for O-3 of the two methods were 47 and 274 ppb, respectively. In addition, BUT-82 showed apparently higher capacity for the removal of O-3 from dry or highly humid air flows than its starting materials, namely MnCl24H(2)O and a dicarboxylic acid ligand containing a long alkyl chain (3,3 '-bis(dodecyloxy)-[1,1 '-biphenyl]-4,4 '-dicarboxylic acid). Isoreticular expansion of the MOF to tune its performance was also proven feasible. This work offers new insights into the development of new materials for O-3 pollution control.
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| GB/T 7714 | Dong, Chen , He, Tao , Wu, Wei et al. Visible ozone detection and removal in two-dimensional Mn(II)-based metal-organic frameworks [J]. | JOURNAL OF MATERIALS CHEMISTRY A , 2024 , 12 (25) : 15055-15062 . |
| MLA | Dong, Chen et al. "Visible ozone detection and removal in two-dimensional Mn(II)-based metal-organic frameworks" . | JOURNAL OF MATERIALS CHEMISTRY A 12 . 25 (2024) : 15055-15062 . |
| APA | Dong, Chen , He, Tao , Wu, Wei , Si, Guang-Rui , Xie, Lin-Hua , Li, Jian-Rong . Visible ozone detection and removal in two-dimensional Mn(II)-based metal-organic frameworks . | JOURNAL OF MATERIALS CHEMISTRY A , 2024 , 12 (25) , 15055-15062 . |
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摘要 ：
一种精确提高贵金属催化氧化CO稳定性及其制备方法，属于催化剂领域。采用静电吸附‑共沉淀‑浸渍方法结合的方式。采用磷钼酸对TiO2改性，将将Pt的前驱体溶液倒入到含有改性TiO2载体的容器中60℃‑80℃搅拌，然后烘干；将烘干的催化剂研成粉末后放入马弗炉400℃‑600℃煅烧。所得催化剂对SO2和H2O的抗性好坏决定了催化剂的稳定性。
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| GB/T 7714 | 李坚 , 何俊达 , 于泽辉 et al. 一种精确提高贵金属催化氧化CO稳定性及其制备方法 : CN202310847421.7[P]. | 2023-07-11 . |
| MLA | 李坚 et al. "一种精确提高贵金属催化氧化CO稳定性及其制备方法" : CN202310847421.7. | 2023-07-11 . |
| APA | 李坚 , 何俊达 , 于泽辉 , 蔡建宇 , 苑靳钰 . 一种精确提高贵金属催化氧化CO稳定性及其制备方法 : CN202310847421.7. | 2023-07-11 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
一种波纹板式玻璃纤维材料负载钒钼钛低温催化剂的制备方法，属于催化剂领域。制备方法：1)配置催化剂浆液，将特制溶剂(主要成分为硅溶胶、硫酸铝和聚乙二醇400)与钒钼钛催化剂粉体、水混合，搅拌均匀；采用浸渍法将波纹板单元置于浆液中处理；4)浸渍后完成后，控出负载催化剂块体，气泵吹扫清理波纹板表面及孔隙内的多余浆液，干燥后完成整体式催化剂制备。采用该浸渍方式制备的波纹板式催化剂具有较好的粉体上载率，且整体质量较轻，降低了成本，减轻了维护压力。进一步煅烧处理后，该装置具有较高的低温活性，适用于160～320℃工厂烟气脱硝。
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| GB/T 7714 | 李坚 , 王若楠 , 张艳丽 et al. 一种波纹板式玻璃纤维材料负载钒钼钛低温催化剂的制备方法 : CN202310309268.2[P]. | 2023-03-27 . |
| MLA | 李坚 et al. "一种波纹板式玻璃纤维材料负载钒钼钛低温催化剂的制备方法" : CN202310309268.2. | 2023-03-27 . |
| APA | 李坚 , 王若楠 , 张艳丽 , 樊星 . 一种波纹板式玻璃纤维材料负载钒钼钛低温催化剂的制备方法 : CN202310309268.2. | 2023-03-27 . |
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