Green Chemical Engineering
·
2020
·
IF 0
Zhengqing Zhang,Xuemeng Jia,Yuxiu Sun,Xiangyu Guo,Hongliang Huang,Chongli Zhong
CO 2 separation performance of polymer membranes can be significantly enhanced by selecting porous fillers with high CO 2 affinity. Ionic liquids incorporation has been recognized as an effective strategy for improving the separation ability of pristine porous fillers. However, the influence of the specific functional groups of ILs in IL@MOF composites on separation performance of MMMs still remains unclear. Herein, we designed three microenvironment-tuned IL@ZIF-8 composites in which the three ILs contain different functional groups (-CH 3, –SO 3 H, and –NH 2 ). Molecular simulation results showed that the NH 2 -IL@ZIF-8 has a commendable CO 2 adsorption capacity and CO 2 /CH 4 adsorptive selectivity, and the results were well confirmed by the following experimental data. More importantly, the prepared NH 2 -IL@ZIF-8 based MMMs also exhibit superior CO 2 separation performance among the three IL@ZIF-8 based MMMs owning to its high CO 2 affinity. Thus, this work can provide guidance for designing IL@MOF composites for MMMs fabrication towards gas separation, and the research mode combining molecular simulation prediction and experimental verification can afford valuable reference for material development in membrane separation field.
研究领域:
材料科学
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化学工程
·
膜分离技术
✓ 已验证
DOI
Crystals
·
2024
·Vol. 14
·期 6
·508
·
IF 2.4
Sumei Li,Jian Ji,Saisai Shan,Sha Chen,Hanbing Li,Qian Xu,Yixuan Liang
Tetrabromobisphenol A (TBBPA) is a kind of widely used brominated flame retardant (BFR), which is proven to be harmful to ecological systems and public health. It is very important to remove TBBPA from the environment. In our study, a magnetic composite named Fe3O4/GO/ZIF-67 was synthesized by a coprecipitation method and applied in the highly efficient adsorption of TBBPA from water. Static adsorption experiments demonstrated that the adsorption capacity could reach 232 mg·g−1within 120 min, which is much higher than those reported in the other literature. The experimental results show that the adsorption of TBBPA on Fe3O4/GO/ZIF-67 followed Langmuir and pseudo-second-order kinetic adsorption models. The main mechanisms for these adsorptions were identified as hydrogen bonds between OH groups in TBBPA and COOHs of Fe3O4/GO/ZIF-67, and π-π stacking between Fe3O4/GO/ZIF-67 and TBBPA. This study provides a method with great promise for the design and synthesis of better adsorbents for the removal of TBBPA from the water environment.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chunxin Jin,Shuai Liu,Rui Zheng,Yanhong Li,Xiaofang Chen,Jürgen Caro,Jianwen Jiang,Aisheng Huang
Metal-organic framework (MOF) membranes have showed great potential in gas separation. To date, it is still a great challenge to precisely control the optimal orientation of MOF membranes with an enhanced gas separation performance. Herein, we prepared a compact and (110) oriented ZIF-8 membrane with a thickness of about 265 nm on graphite substrate within 1 h at room temperature via electric-field-driven strategy. Since the membrane is an intergrown one-crystal layer, grain boundary retardation of the flux is eliminated. Furthermore, due to the reduction of the transport pathways through the oriented structure, the (110) oriented ZIF-8 membrane exhibits a high gas separation performance. At 100 °C and 1 bar for the separation of equimolar binary gas mixtures H 2 /CO 2 , H 2 /CH 4 and H 2 /C 3 H 8 , separation factors of 49.5, 90.9 and 121.8 can be obtained, with H 2 permeance of about 1.7 × 10 -7 mol·m −2 ·s −1 ·Pa −1 . The developed strategy exhibits excellent reproducibility and scalability, and a large area ZIF-8 membrane can be consistently prepared on the graphite substrate, thus facilitating the preparation and application of the ZIF-8 membrane on a large scale. Further, the electric-field-driven strategy is also helpful for the preparation oriented ZIF-67 and ZIF-L membranes, confirming its versatility for the preparation of oriented MOF membranes.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Xinghao Li,Sara Ajmal,Penghui Fang,Xiaoxing Zhou,Maoni Lu,Sichen Li,Ping Chen,Peng Li,Manzhou Zhu
Ultrafine metal nanoclusters have been extensively studied due to their fascinating chemical characteristics. In this work, ultrafine AgCu nanoclusters are synthesized and loaded on the defective ZIF-8 (denoted as AgCu/D-ZIF-8). The findings show that the as-obtained AgCu/D-ZIF-8 catalysts with low AgCu loading (0.387 wt%) exhibit outstanding catalytic performance and recyclability for the reaction of azide–alkyne cycloaddition (click reaction) at 35 °C. Compared with monometallic Ag25/D-ZIF-8 and Cu25/D-ZIF-8 catalysts, bimetallic AgCu/D-ZIF-8 catalysts present exceptional activity for the click reaction. Additionally, AgCu/D-ZIF-8 catalysts display a higher yield of target product for this reaction compared to AgCu/ZIF-8. The experimental results suggest that some defective sites in D-ZIF-8 are occupied by AgCu nanoclusters, which may be key to improving the activity and recyclability of AgCu/D-ZIF-8 catalysts. Consequently, this work provides valuable insights for designing ultrafine bimetallic catalysts with high performance.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 16
·7384-7393
·
IF 2.7
Wanyu Lu,Qijin Tang,Huajing Cheng,Shudi Li,Cailong Zhou,Hao Yang
The potential of bionic-inspired superhydrophobic membranes in the field of oil–water separation is significant. In this study, tannic acid induced the rhombohedral crystal form of ZIF-8 to grow in situ on a nylon membrane, resulting in the formation of a layered micro-nano structure. As a result, we successfully prepared a multifunctional composite membrane with exceptional underwater superoleophobicity and oil anti-adhesion. The composite membrane demonstrated an impressive separation flux for layered oil–water mixtures, reaching up to 4851.2 L m−2 h−1. Furthermore, when dealing with surfactant-free oil-in-water emulsions, the separation efficiency exceeded 99.0%. Because ZIF-8 is positively charged, the composite membrane exhibits different separation fluxes in the presence of different surfactants. For SDS stabilized toluene emulsion in water, the maximum separation flux of the composite membrane is 1307.4 L m−2 h−1. The membrane also has good tolerance to alkali and salt substances and is easy to recycle and reuse. Consequently, the ZIF-8 composite membrane has significant potential in effectively separating oil–water emulsions.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lei Zhang,Yong Zhao,Hao Yu,Liang Chen,Xiang Liu,Ailing Zhang,Zhibin Deng,Jian Zhen Ou
Graphene oxide (GO) membranes hold promise for selective CO 2 adsorption over N 2 due to their carboxyl groups, making them attractive for flue gas CO 2 capture. However, challenges such as limited carboxyl content, flexible nanosheets, and dense layer stacking hinder their N 2 /CO 2 gas selectivity, pressure resistance, and permeability. In this study, we introduce a specific sub-nanometer framework structure within GO membranes by in-situ growing ZIF-8 nanocrystals. This novel approach, achieved through simultaneous infiltration of zinc nitrate and 2-methylimidazole precursors on both sides of the membrane, enhances CO 2 capture and pressure resistance capabilities of resulting ZIF-8@GO composite membranes. Additionally, the incorporation of carboxylated wrinkled graphene (WG) and ethylenediamine (EDA) cross-linking agent molecules improves CO 2 capture capability and introduces reinforced porous structures to enhance permeability. Experimental results demonstrate remarkable permeability, selectivity, and pressure resistance of the prepared ZIF-8@EDA-GO/WG composite membranes. Under a gas pressure of 0.2 MPa, permeability reaches 1850 GPU, with theoretical selectivity for N 2 /CO 2 single gas and separation factors for mixed gases of 18.3 and 32.3, respectively, surpassing conventional GO membranes (3 GPU, 1.1, and 1.2). Even under elevated air pressure conditions (1.2 MPa), the composite membranes maintain a theoretical selectivity of 13.4. Our CO 2 capture membrane design strategy not only advances the development of functional membranes but also contributes to mitigating CO 2 emissions from flue gas, thereby combating global warming.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Enhao Zhang,Sisi Yao,Xiaoxuan Guo,Xinyi Zhou,Yutai Li,Feifan Xie,Yonghang Wei,Dongjiang Yang,Jin Sun,Yun Lu
The advancement of highly efficient bifunctional electrodes tailored for water electrolysis, specifically targeting the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), is pivotal for sustainable hydrogen production. However, sluggish reaction kinetics and elevated overpotentials pose formidable hurdles. In this study, an innovative strategy is introduced by integrating Fe@ZIF-67 onto self-supporting carbonized rattan stem (CR), leveraging its distinctive through-channel macroporous architecture to bolster catalytic efficacy. The self-supporting CR substrate not only enhances mass transport but also facilitates uniform deposition of ZIF-67, ensuring optimal exposure of active sites. A comparative analysis with carbonized basswood (CW) underscores the superior performance of the macroporous CR substrate in augmenting both OER and HER activities. Notably, the Fe@ZIF-CR self-supported electrode achieves an overpotential of 208 mV at 10 mA cm⁻² for oxygen evolution and 317 mV at 100 mA cm⁻² for hydrogen evolution. Additionally, the self-supporting nature of the CR substrate guarantees long-term stability and mitigates catalyst loss during operation. These findings underscore the synergistic advantages of the macroporous structure and ZIF-67 active sites, offering fresh perspectives on the utilization of biomass-derived carbon materials in sustainable energy technologies.
研究领域:
材料科学
·
可再生能源
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2018
·
IF 2.179
Jie Peng,Huiping Zhang,Ying Yan
A new method was employed to synthesize a novel high voidage ZIF-8 membrane over paper-like stainless steel fibers (PSSF). Firstly, paper-like stainless steel fibers (PSSF) were prepared by wet lay-up papermaking and sintering process , then the ZIF-8 membrane was coated on the PSSF support by secondary growth process. The effects of the seed layer growth time, the Hmim (2-methylimidazole)/Zn (Zinc nitrate hexahydrate) molar ratios , the solvothermal synthesis temperature and time on properties of ZIF-8 membrane/PSSF composites were investigated by modern characterization methods. The experimental results indicated that the void volume of ZIF-8 membrane/PSSF composites reached 89%. The optimal specific surface area of composites was 398 m 2 /g and the total pore volume was 0.174 cm 3 /g. Specifically, the size of seeds were approximately 250 nm when Hmim/Zn molar ratios and seed layer deposition time were 80 and 12 h, respectively. Under the condition of optimal seed layer, ZIF-8 membrane/PSSF composites showed outstanding continuity, compactness, free-defect and crystal shape when solvothermal synthesis time and solvothermal synthesis temperature were 24 h and 100 °C, respectively.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF STORED PRODUCTS RESEARCH
·
2025
·
IF 2.8
Dongxiang Li,Gaihuan Ren,Baokui Yuan,Zhenhua Cui,Yunhe Zhang,Shenpeng Hu,Wen Sun,Wenjing Yu,Weijie Zhang,Dongxu Lu,Jianxin He
Foodborne illnesses caused by pathogenic bacteria pose a significant threat to food safety and human health. In this study, a pH-responsive PLA/ZIF-8@CA packaging membrane developed by polylactic acid (PLA) nanofiber as a matrix, where ZIF-8 was loaded via in-situ growth. The membranes were then immersed in CA to produce PLA/ZIF-8@CA nanofiber membrane, effective encapsulation of CA to address issues of volatility of the CA. The deterioration of ZIF-8 in an acidic environment leads to the pH-responsive release of CA from the PLA/ZIF-8@CA nanofiber membrane. The XRD and FT-IR characterization confirmed the successful encapsulation of CA within ZIF-8 and its uniform loading onto the PLA nanofiber matrix. The PLA/ZIF-8@CA nanofiber membrane demonstrated exceptional flexibility, a noteworthy antioxidant activity (radical scavenging rate of 92.05 %), outstanding sustained release performance, and exceptional antibacterial efficacy against Escherichia coli and Staphylococcus aureus (inhibition rates all exceeded 99 %). Furthermore, the PLA/ZIF-8@CA nanofiber membrane exhibited high biological safety, as evidenced by the 100 % survival rate of zebrafish after 15 days. The membrane also exhibited significant soil biodegradability, with complete degradation achieved after 150 days, resulting in a weight loss rate of 100 %. The pH-responsive PLA/ZIF-8@CA nanofiber membrane, which has been demonstrated to exhibit excellent performance, has been utilized as an active packaging in the preservation of broccoli, thereby effectively prolonging its shelf life from 5 to 9 days. The findings underline the potential of this pH-responsive membrane for utilization in active packaging systems for food preservation.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 36
·15459-15466
·
IF 3.288
Lijuan Liu,Yu Ma,Weiting Yang,Chen Chen,Meiling Li,Duoyu Lin,Qinhe Pan
One of the challenges to sustainability is to efficiently and conveniently remove organic dyes from wastewater. Herein, a light ZIF-8@chitosan (CS) composite sponge with bulk density of 0.18 g cm−3 was prepared by an in situ method. The composite sponge possesses a three-dimensional porous structure with abundant chelating sites, which can efficiently and selectively remove congo red (CR). The maximum adsorption capacity (987.01 mg g−1) is higher than most chitosan-based adsorbents. High selective adsorption towards CR over other dyes is also demonstrated. Over 90% adsorption capacity was retained after five adsorption–desorption cycles. In addition, a column-mounted equipment for fixed-bed cycle wastewater treatment was assembled with a freestanding ZIF-8@CS sponge, which exhibited high CR removal efficiency of 99%. Based on the systematic spectroscopy characterization, the dominant role in the superior adsorption performance is attributed to the electrostatic interactions, hydrogen bonds, π–π stacking and metal coordinating interaction between the ZIF-8@CS sponge and CR.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Huiyuan Chu,Jiwei Shen,Chaozhan Wang,Yinmao Wei
Developing nanotherapeutic system with combined antitumor capability has increasingly become a promising strategy for cancer treatment. Herein, we present a biodegradable iron-doped ZIF-8 based nanoconstruct to integrate merits of chemodynamic therapy, photothermal therapy and chemotherapy into ‘‘all-in-one’’ nanoplatform. Specifically, the nanoconstruct is assembled by loading chemotherapeutic drug (doxorubicin, DOX) and photothermal transforming agent (indocyanine green, ICG) into Fe 2+ -doped ZIF-8 nanocrystals . Benefiting from the intrinsic pH-responsive property, the ZIF-8 nanoconstruct can be degraded easily in the typically acidic tumor microenvironment or cancer cells, leading to smart tumor microenvironment-responsive Fe 2+ , DOX and ICG release at high-rate. Particularly, the ZIF-8 nanoconstruct can release Fe 2+ rather than Fe 3+ of lower Fenton catalytic activity, leading to efficient Fenton reaction to generate abundant hydroxyl radical (·OH) for chemodynamic therapy. The released DOX and ICG demonstrate exceptional chemotherapy and near infrared laser triggered photothermal therapy capability with high photothermal conversion efficiency (35.9%), respectively. In turn, the photothermal therapy can significantly enhance the chemodynamic therapy effect. The as-designed nanoconstruct with synergistic therapeutic efficacy provide a fatality rate as high as 93.7% for cancer cells, which is promising for efficient cancer eradication.
研究领域:
纳米医学
·
肿瘤学
·
生物材料学
✓ 已验证
DOI
高影响因子
LUMINESCENCE
·
2019
·Vol. 34
·期 2
·193-199
·
IF 1.691
Nan Liu,Juan Hao,Lili Chen,Yonghai Song,Li Wang
Zeolitic imidazolate framework-8 (ZIF-8) loading rhodamine-B (ZIF-8@rhodamine-B) nanocomposites was proposed and used as ratiometric fluorescent sensor to detect copper(II) ion (Cu 2+ ). Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, nitrogen adsorption/desorption isotherms and fluorescence emission spectroscopy were employed to characterize the ZIF-8@rhodamine-B nanocomposites. The results showed the rhodamine-B was successfully assembled on ZIF-8 based on the π-π interaction and the hydrogen bond between the nitrogen atom of ZIF-8 and –COOH of rhodamine-B. The as-obtained ZIF-8@rhodamine-B nanocomposites were octahedron with size about 150–200 nm, had good water dispersion, and exhibited the characteristic fluorescence emission of ZIF-8 at 335 nm and rhodamine-B at 575 nm. The Cu 2+ could quench fluorescence of ZIF-8 rather than rhodamine-B. The ZIF-8 not only acted as the template to assemble rhodamine-B, but also was employed as the signal fluorescence together with the fluorescence of rhodamine-B as the reference to construct a novel ratiometric fluorescent sensor to detect Cu 2+ . The resulted ZIF-8@rhodamine-B nanocomposite fluorescence probe showed good linear range (68.4 nM to 125 μM) with a low detection limit (22.8 nM) for Cu 2+ combined with good sensitivity and selectivity. The work also provides a better way to design ratiometric fluorescent sensors from ZIF-8 and other fluorescent molecules.
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）