MOLECULES
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2019
·Vol. 24
·期 16
·2972
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IF 3.06
Jiang-Zhen Qiu,Long-Fei Wang,Jiuxing Jiang
Two-dimensional aluminophosphate is an important precursor of phosphate-based zeolites; a new Sun Yat-sen University No. 6 (SYSU-6) with |Hada|2[Al2(HPO4)(PO4)2] has been synthesized in the hydrothermal synthesis with organic structure-directing agent (OSDA) ofN,N,3,5-tetramethyladamantan-1-amine. In this paper, SYSU-6 is characterized by single-crystal/powder X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray analysis, transmission electron microscopy, infrared and UV Raman spectroscopy, solid-state27Al,31P and13C magic angle spinning (MAS) NMR spectra, and elemental analysis. The single-crystal X-ray diffraction structure indicates that SYSU-6 crystallized in the space groupP21/n, with a = 8.4119(3), b = 36.9876(12), c = 12.5674(3), α = 90°, β = 108.6770(10)°, γ = 90°, V = 3704.3(2) Å3, Z = 4, R = 5.12%, for 8515 observed data (I > 2σ(I)). The structure has a new 4,12-ring layer framework topology linked by alternating AlO4and PO4tetrahedra. The organic molecules reside between the layers and are hydrogen-bonded to the inorganic framework. The new type of layer provides a greater opportunity to construct zeolite with novel topology.Keywords:aluminophosphate;2-D zeolite;SYSU-6
研究领域:
材料科学
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化学
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PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Dandan Diao,Haoyi Zhang,Jingui Wang,Qiang Xiao
Two-dimensional (2D) zeolite nanosheets open exciting opportunities for the application in catalysis and separations. Exfoliation of layered zeolite shows a promising way for the preparation of 2D zeolite nanosheets. Herein, non-swollen MCM-22P with ordered layer spacing was successfully exfoliated to dispersible MWW nanosheets. Firstly, a wet-oxidization method, i.e., heating in a mixture of H 2 SO 4 and H 2 O 2 (called piranha solution) was adopted to remove the template of pyridine (PI) from as-synthesized MCM-22P zeolite. IR, TG, XRD , N 2 adsorption confirmed that the wet-oxidization could efficiently remove PI from MCM-22P zeolite while preserving the MWW crystal structure. Exfoliation of the detemplated MCM-22P zeolite was successfully achieved by an ultrasonic treatment in water. After purification by sedimentation, 2D MWW zeolite nanosheets dispersed in aqueous solution were obtained. The monolayer MWW nanosheets with high purity are confirmed by SEM and TEM observations. The wet oxidation followed by the sonication method provides an alternative way for the exfoliation of layered zeolite to dispersed nanosheets.
研究领域:
材料科学
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催化与分离技术
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 14
·6720-6728
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IF 3.925
Jie Shen,Qi Sun,Jun Cao,Peng Wang,Weilin Jia,Suyang Wang,Ping Zhao,Zepeng Wang
Zeolite LTA, with high porosity and uniform pore distribution, has been widely used in the gas adsorption field. In this paper, a 1.38 nm thick two-dimensional zeolite LTA was synthesized from kaolin, changing the cubic morphology of the traditional zeolite LTA. SEM and TEM images showed that the zeolite LTA exhibited a lamellar structure. In a comparative experiment with CO2 adsorption at different temperatures, the 2D zeolite LTA with a large specific surface area could capture more CO2 than the conventional 3D zeolite LTA. In addition, the CO2/CH4 selectivity of the 2D Zeolite LTA was 76.78 at 298 K.
研究领域:
材料科学
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环境科学
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Zimei Zhang,Jing Wei,Min Deng,Lin Yang,Lu Yao,Wenju Jiang,Xuezhong He,Kaifang Wang,Jiali Tang,Bo Tang,Junfeng Zheng,Zhongde Dai
Mixed matrix membranes (MMMs) combine the desirable properties of polymers and inorganic fillers, yet interfacial incompatibility frequently results in non-selective voids that compromise selectivity. Here, we report a straightforward heat treatment (200–400 °C) to enhance interfacial compatibility in MMMs composed of 6FDA-DAM-AB-TFMB polyimide (PI) and two-dimensional zeolite (MFI) fillers. Incorporating porous zeolite fillers increases gas permeability, particularly for polar molecules such as CO 2 , while heat treatment induces crosslinking and polymer chain rearrangement, effectively eliminating non-selective voids and boosting selectivity. Moreover, partial carbonization during the thermal process generates a microporous structure that substantially increases overall gas permeability. Consequently, the MFI/PI-30 % membrane treated at 400 °C achieves exceptional CO 2 and H 2 permeabilities of 2220.8 Barrer (12.7 × higher) and 1767.2 Barrer (10.3 × higher), respectively, while retaining CO 2 /CH 4 and H 2 /CH 4 selectivity—surpassing the 2008 Robeson upper bound. The key innovation of this study is leveraging a moderate-temperature heat treatment that simultaneously mitigates interfacial incompatibility and creates micropores, thereby significantly enhancing both permeability and selectivity. This simple, scalable strategy holds great promise for the development of high-performance MMMs in advanced gas separation applications.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Yi Zheng,Jinyue Song,Junzhou Men,Hui Xian,Yating Wang,Tao Jiang
Metal organic frameworks (MOFs) are regarded as the promising potential photocatalytic materials because of its high specific surface area , regular morphology and highly adjustable structure. Herein, introducing different addition percentage of 1-vinylimidazole to two-dimensional zeolite imidazole framework (ZIF-L) with leaf-shaped morphology was successfully prepared via water-assisted strategy and applied in the photocatalytic hydrogen evolution experiments. The results indicate that VZ-12 shows the highest photocatalytic activity with hydrogen production rate of 162.7 μmol g −1 h −1 , which is 3 times than that in VZ-0 (pure ZIF-L, 56.33 μmol g −1 h −1 ) under simulated sunlight. The enhanced performance is ascribed to the increased specific surface area observed via BET, narrow band gap ( E g ) explored through UV–vis DRS and decreased recombination of photo-generated charge carriers measured by photoluminescence (PL). In a word, the effort of our study provides a new idea for developing and fabricating efficient hydrogen production photocatalyst via water splitting.
研究领域:
材料科学
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光催化
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高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
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IF 3.898
Yafei Su,Xuke Zhang,Hui Li,Donglai Peng,Yatao Zhang
Layered assembled membranes of 2D leaf-like zeolitic imidazolate frameworks (ZIF-L) nanosheets have received great attention in the field of water treatment due to the porous structure and excellent antibacterial ability, but the dense accumulation on the membrane surface and the low permeate flux greatly hinder their application. Herein, we synthesized mHNTs (modified halloysite nanotubes)/ZIF-L nanocomposites on modified mHNTs by in situ growth method. Interestingly, due to the different size of mHNTs and ZIF-L, mHNTs were packed in ZIF-L nanosheets. The hollow mHNTs provided additional transport channels for water molecules, and the accumulation of the ZIF-L nanosheets was decreased after assembling mHNTs/ZIF-L nanocomposites into membrane by filtration. The prepared mHNTs/ZIF-L membrane presented high permeate flux (59.6 L·m −2 ·h −1 ), which is 2–4 times of the ZIF-L membranes (14.8 L·m −2 ·h −1 ). Moreover, mHNTs/ZIF-L membranes are intrinsically antimicrobial, which exhibit extremely high bacterial resistance. We provide a controllable strategy to improve 2D ZIF-L assembles, and develops novel membranes using 2D package structure as building units.
研究领域:
材料科学
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环境工程
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化学工程
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高影响因子
PROGRESS IN ORGANIC COATINGS
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2024
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IF 6.5
Guangyu Zhu,Fuyan Kang,Qianyun Tan,Huali Li,Gege Zhang,Min Wu,Yong Tan,Fa-Qian Liu
Marine biological pollution restricts the sustainable development of marine economy. Cu 2 O stands as a predominant antifouling agent for developing marine resources engineering. However, the problems of easy aggregation, rapid failure, and explosive release of copper ions limit the practical application of Cu 2 O. In this work, a novel copper-functionalized two-dimensional zeolitic imidazolate framework-7 nanocomposites ZIF-7@Cu 2 O was successfully fabricated by in-situ growth methodology. The emergence of ZIF-7@Cu 2 O nanocomposites solves the above problems in the use of Cu 2 O. Due to the huge specific surface area of the 2D ZIF-7 nanosheets and the electrostatic interactions, the cubic Cu 2 O, with a diameter of 250 nm, can be uniformly and firmly anchored on the surface of 2D ZIF-7 nanosheets, thus effectively avoiding the rapid dissolution of cuprous oxide and reducing the release rate of copper ions. Antibacterial experiments demonstrate that, in comparison to ZIF-7, Cu 2 O, and ZIF-7/Cu 2 O (physical mixture of ZIF-7 and Cu 2 O), ZIF-7@Cu 2 O exhibits superior antibacterial properties with 99.99 % against E. coli and the minimum inhibitory concentration (MIC) of 32 μg/mL. Furthermore, the reactive oxygen species (ROS) assay confirms ZIF-7@Cu 2 O could promote the generation of ROS. Antibiofilm formation results reveal that ZIF-7@Cu 2 O nanocomposites are effective in preventing biofilm formation of E. coli and P. aeruginosa at a low concentration (50 μg/mL). Finally, ZIF-7@Cu 2 O nanocomposites are employed as fillers to prepare ZIF-7@Cu 2 O/EP composite coating, the bactericidal kinetics and bacterial adherence on the coating surface are investigated. We believe this work could provide novel insights into the rational design of 2D ZIF-based material in the field of antifouling.
研究领域:
材料科学
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纳米技术
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生物医学工程
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环境科学
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DOI
高影响因子
ACS Omega
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2024
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IF 3.7
Wenbo Luo,Haoyu Liu,Hong Yuan,Hao Liu
Hierarchical zeolites can provide multidimensional spatial networks and, therefore, have significant potential as catalysts for the cracking of biomass to generate light olefins. The present work synthesized the diquaternary ammonium-type surfactant [C18H37–N+(CH3)2–(CH2)6–N+(CH3)2–C6H13]Br2, incorporating hydrophobic 18-carbon alkyl groups for usage as a structure-directing agent. This compound was subsequently used to prepare nanosheets of a hierarchical ZSM-5 two-dimensional zeolite (HNZSM-5) through a one-pot hydrothermal method. The crystal phase, morphology, and hierarchical structure of the HNZSM-5 were analyzed using various techniques, including X-ray diffraction, electron microscopy, and N2 adsorption/desorption. When applied to the catalytic cracking of a waste cooking oil model compound, the HNZSM-5 exhibited superior activity and stability compared with a conventional ZSM-5. This performance was attributed to the more accessible acid sites and unique lamellar structure of the former material. The HNZSM-5 also outlasted the conventional zeolite, showing deactivation after 45 h of reaction compared with 20 h, indicating exceptional stability and excellent resistance to coking.
研究领域:
材料科学
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催化化学
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Junzhou Men,Yi Zheng,Chen Luo,Hui Xian,Yuxia Zhang,Yating Wang,Tao Jiang
Defect engineering is crucial for optimizing the band structures and charge separation of photocatalysts. Herein, the quantity and distribution (core/shell) of organic ligand defects in leaf-shaped zeolite imidazole framework (ZIF-L) composites were modulated via a multi-step method. VZ-12@ZIF-L (with 12 % 1-vinylimidazole in the core) exhibited the highest carrier separation efficiency and the strongest driving force for the hydrogen evolution reaction (HER), achieving a hydrogen evolution rate of 443.19 μmol·h⁻¹ ·g⁻¹ . This rate is 1.81 times that of VZ-25@ZIF-L (with a high defect quantity) and 1.40 times that of ZIF-L@VZ-12 (with defects in the shell). Mechanistically, core defects facilitated the transport of photogenerated carriers, while shell defects narrowed the band gap. Notably, the impact of carrier transport capacity on photocatalytic activity was more significant than that of light absorption. This study provides new insights for the design of efficient defect-engineered metal-organic frameworks (MOFs).
研究领域:
材料科学
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光催化
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金属有机框架
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能源化学
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纳米材料
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半导体物理
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表面科学
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2025
·
IF 7.3
Chenyang Zhao,Chen Wang,Yue Li,Wenlin Yuan,Yi Huang,Di Cheng,Tao Shen,Ji Zhang,Jie Liu,Libei Jiang,Chao Yang,Qianhong Shen,Hui Yang
Two-dimensional Metal-organic frameworks have recently emerged as promising materials for enhancing the anticorrosion protection performance of polymeric coatings. In this study, ZIF-ZG@PEG-GA nanofiller was synthesized by modifying zeolitic imidazolate framework nanosheets with a polyethylene glycol-gallic acid (PEG-GA) complex shell, and subsequently incorporated into waterborne epoxy matrix. Potentiodynamic polarization analysis revealed that the addition of ZIF-ZG@PEG-GA to a 3.5 wt% NaCl solution reduced the corrosion current density from 5.528×10 −6 A/cm 2 to 1.892 × 10 −6 A/cm 2 . Electrochemical impedance spectroscopy (EIS) analysis revealed that ZGPG/EP exhibited superior protective performance after 42 d of immersion, with the highest |Z| f=0.01Hz (1.87 × 10 9 Ω·cm 2 ), R coat (4.27 × 10 8 Ω·cm 2 ), and R ct (1.43 × 10 9 Ω·cm 2 ). Furthermore, EIS analysis of scratched coatings demonstrated that ZIF-ZG@PEG-GA effectively impeded corrosion propagation and prevented further coating degradation. The enhanced anticorrosion performance is attributed to the passive protection by increasing the diffusion resistance of corrosive species, and the active protection through the release of gallic acid from the PEG-GA complex.
研究领域:
材料科学
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腐蚀工程
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纳米技术
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高分子科学
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电化学
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高影响因子
危险品化学品经营许可证（带存储）