POLYMER TESTING
·
2021
·
IF 4.282
Xuanhe Yang,Shaoping Li,Yanqing Yao,Jia Zhao,Zhiguo Zhu,Chunpeng Chai
A Polypropylene non-woven fabric/ZIF-8 composite film was prepared by in-situ grown method. The loading amount of ZIF-8 of PP non-woven fabric/ZIF-8 composite film increases as the volume of reaction solution and the aging time go up. Scanning electron microscopy (SEM) was used to characterize the microstructure of PP non-woven fabric/ZIF-8 composite film. The results show that ZIF-8 nanoparticles were evenly distributed on the PP fiber. The hydrophobicity of PP non-woven fabric/ZIF-8 composite was characterized by water contact angle. The contact angle was up to 137.45°, when ZIF-8 loading amount was 0.85 g·g −1 . The material can quickly adsorb floating oil and underwater heavy oil without absorbing water, and the gasoline adsorption capacity of the composite was up to 3612% of its mass and maintains a high oil absorption capacity after it was reused 43 times, which proves that PP non-woven fabric/ZIF-8 composite film is a well recyclable oil/water separation material.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Pin Hou,Jiaqi Yan,Xiaoyu Yang,Ridha Djellabi,Xinrui Ge,Xinyu Sun,Jianli Jia,Jianbing Wang
Metal-organic framework (MOF)-derived carbon-based electrodes have demonstrated outstanding capacitive deionization (CDI) performance, owing to their special structures and configurations. Developing novel low-cost controllable protocols to obtain highly efficient Nitrogen-doped carbon-derived MOFs is the most challenging factor to transfer widely the application of these materials at real world. This work aims to develop a low-cost one-step growth route to produce N-doped carbon (NGZC) utilizing N-doped graphene quantum dots (N-GQDs) and zeolitic imidazolate frameworks-8 (ZIF-8) as starting substrates. The surface chemistry, morphology and CDI performance of the as-synthesized NGZC electrode were investigated, compared with conventional materials. The authors found that the introduction of N-doped graphene quantum dots dramatically enhances the mesopore volume (0.742 cm 3 /g) and pyrrolic-N ratio (19.21 %) for NGZC. These improvements effectively shorten the electron and sodium ion transport paths which in turn facilitate the pseudocapacitive activity and charge transfer in NGZC. The specific capacitance and salt adsorption capacity were found to be 283.16 F/g and 17.86 mg/g, respectively, demonstrating superior values than commonly used electrodes. NGZC shows a high stability over 30 adsorption-desorption cycles with a capacity retention of 90 %. DFT results further demonstrate the pseudocapacitive superiority of pyrrolic-N to reinforce the Na + capture. This finding provides new insights into the design of an economical and controllable N-doped carbon electrode for efficient CDI desalination.
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
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Zichen Wang,Yao Dai,Yumeng Wang,Peilu Zhang,Lin Zhou,Yuan Jiang,Ruoke Liu,Sarah Elfadil Ali Adam,Chao Sun,Xiaochun Chen
Polyethylene glycol terephthalate (PET) is widely utilized in industrial applications and everyday life. However, its extensive use has led to substantial environmental challenges. This study presents a highly active and selective [DBU][m-cresol] proton-ionic liquid (PIL)-immobilized ZIF-8 catalyst for PET resource utilization. Using just 15 mg of the ZIF-8@[DBU][m-cresol]-2 catalyst, PET degradation reached 97.72 %, while BHET conversion achieved 86.95 % within 60 min. The Zn 2+ ions in the catalyst decrease the electron density of the m-cresol carbocation, thus improving the nucleophilic substitution capability of [DBU][m-cresol]. The influence of catalyst dosage, the ethylene glycol-to-PET ratio, and temperature on degradation and conversion was investigated. After five cycles, the catalyst retained a degradation efficiency of 77.71%. In practical applications, testing on three commercial PET materials demonstrated degradation efficiencies exceeding 90%. DFT calculations and LC-MS analysis indicate that hydrogen bonding among ethylene glycol (EG), PET, and ZIF-8@[DBU][m-cresol] enhances PET’s electrophilicity, while Zn 2+ decreases the electron density of carbocations, thereby facilitating PET degradation. This work highlights the potential of proton-based ionic liquid-supported catalysts for efficiently converting PET waste into valuable resources.
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
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Chenxin Zhang,Wei Chen,Gary Owens,Zuliang Chen
There is increasing demand and interest in efficient methods for the recovery of rare earth elements (REEs) from wastewater because of the growing concerns associated with the negative impacts of REEs-rich waste discharged on pristine ecosystems. Here, we designed a ZIF-8@ALG composite hydrogel by encapsulating zeolitic imidazolate frameworks-8 (ZIF-8) into sodium alginate and poly (vinyl alcohol) double cross-linked networks (ALG) for the recovery of REEs from mine wastewater. ZIF-8@ALG showed exceptional REEs adsorption performance with the most superior separation factor (Ho/Mn) of 597.5. For the REEs considered, the ZIF-8@ALG composite exhibited a preference for heavy REEs with high adsorption efficiencies (65.3 ∼ 97.2%) and distribution coefficients (2045.5 ∼ 28500.0 mL·g −1 ). Adsorption involved a combination of electrostatic attraction, complexation and ion exchange mechanisms. REEs adsorbed on ZIF-8@ALG could also be desorbed using sodium citrate via ion-exchange and complexation, thus achieving efficient REEs recovery. In addition, ZIF-8@ALG was stable and reusable, maintaining effective adsorption in wastewater over four consecutive cycles, where the optimal adsorption efficiency reached 80.0%. Overall, this study provided an effective and feasible method for the recovery of REEs in mine wastewater, and confirmed that ZIF-8-based materials have significant potential for REEs recovery applications in wastewater engineering treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Rui Ding,Wenji Zheng,Kai Yang,Yan Dai,Xuehua Ruan,Xiaoming Yan,Gaohong He
High permeability and selectivity are desirable for mixed matrix membranes (MMMs) based CO 2 separation. Herein, a microemulsion based mixed linker strategy is proposed to introduce amino groups during the growth of ZIF-8. Compared to post-synthetic modification, this method presents a less reduction in S BET of ZIF-8, which is beneficial for CO 2 adsorption. By controlling the ratio of 2-methylimidazole to 2-aminobenzimidazole, NH 2 -ZIF-8 with various morphologies and sizes were synthesized and serve as the filler to fabricate the MMMs for CO 2 capture. From the scanning electron microscopy (SEM), no obvious agglomerations or defects are observed in ZIF-8/Pebax MMMs, due to the amino groups in ZIF-8 can interact with the amide in Pebax chain, which can improve compatibility between ZIF-8 and Pebax. With the amino groups, NH 2 -ZIF-8 shows higher affinity with CO 2 than that of non-amine-functionalized ZIF-8, leading to an enhancement in the separation performances. When the MMM doped with 6 wt% of NH 2 -ZIF-8(10), the CO 2 permeability reaches up to 163.8 Barrer, which increases by around 53% and 107.6% in contrast with the ZIF-8/Pebax MMM and pure Pebax membrane. Besides, the CO 2 /N 2 selectivity is enhanced by around 10% and 27%, respectively. These results indicate that amine-functional modification by mixed ligands is a useful way to construct MOFs-based MMMs with high performance for CO 2 /N 2 separation.
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
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yongchun Hou,Xiaowei Xu,Yaqin Zhou,Qing Li,Liangliang Zhu,Chang Liu,Su Chen,Jie Pang
Designing a novel biomaterial for wound healing is based on biocompatibility and excellent mechanical strength. In this study, bioactive glass (BG) and zeolitic imidazolate framework-8 (ZIF-8) have been incorporated into poly(ε-caprolactone)/poly(vinyl alcohol) (PCL/PVA) composite skin scaffolds via microfluidic electrospinning. Interestingly, the addition of ZIF-8 further strengthens the BG stability and demonstrates better antibacterial effects. Utilizing the slow release of Zn, Ca, and Si ions, it also significantly promotes growth factor expression and skin regeneration. In addition, it is further demonstrated by in vitro and in vivo studies that the prepared composite skin scaffolds possess excellent biocompatibility, antibacterial capabilities, and mechanical properties. The prepared BG/ZIF-8-loaded scaffold possesses high tensile strength (26 MPa) and excellent antibacterial properties (achieves 89.64 and 78.8% inhibition of E. coli and S. aureus, respectively), and cell viability increased by 51.2%. More importantly, the wound shrinkage of the BG/ZIF-8-loaded scaffold is better than that of an unloaded scaffold, and the shrinkage rates of PCL/PVA@BG/ZIF-8(1 wt %) group is 95% with 2.2 mm granulation growth thickness within 12 days. Thus, the composite skin scaffold loaded with BG/ZIF-8 prepared by microfluidic electrospinning provides a new perspective for accelerating wound healing and is a potential novel therapeutic strategy for efficient wound healing.
研究领域:
生物材料学
·
组织工程学
·
医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Guanzhou Luo,Lanfang Wen,Kai Yang,XinYing Li,Shouping Xu,Pihui Pi,Xiufang Wen
A robust and durable fluorinated 8-MAPOSS-based superamphiphobic fabric (Fabrics-S-MAPOSS-F) was obtained by in situ grafting of 3-Mercaptopropyltriethoxysilane (MPTES), 8-Methacryl polyhedral oligomeric silsesquioxane (8-MAPOSS) and 2-(perfluorooctyl) ethyl methacrylate (FMA) on a cotton fabric. The micropores and mesopores bonding structure with low surface energy on the as-prepared Fabrics-S-MAPOSS-F can capture air, endowing the fabric antifouling, self-cleaning, dehydration resistance, buoyancy boost, drag reduction performance, as well as good durability after UV irradiation, mechanical damage, 300 °C oven heating for 2 h and separately immersion in acid/base/salty solution, even in 98% H 2 SO 4 for 30 min. The Fabrics-S-MAPOSS-F can float on the surface of water or blended oil effortlessly with loading 18.8 times and 15.6 times its own weight of SiO 2 powder, respectively. Compared to untreated fabric, the Fabrics-S-MAPOSS-F exhibits a sailing velocity boost by nearly 2.5 times in both water and blended oil. The drag reduction rate is as high as ~154.7%. This novel smart Fabrics-S-MAPOSS-F can be considered a promising material in life jacket, special garments, package protection or smart device.
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2019
·
IF 2.938
Zhi-Xin Li,Xian-Yong Wei,Guang-Hui Liu,Xing-Long Meng,Zheng Yang,Shuo Niu,Di Zhang,Hua-Shuai Gao,Zhi-Hao Ma,Zhi-Min Zong
Highly selective hydrogenation of furfural and levulinic acid (LA) was studied over Ni 0.09 Zn/NC 600 derived from zeolitic imidazolate frameworks. The existence of active Ni 3 ZnC 0.7 particles in Ni 0.09 Zn/NC 600 was confirmed by multiple characterizations. As a result, over Ni 0.09 Zn/NC 600 , 99.7% of furfural conversion (FC) and 100% of furan-2-ylmethanol selectivity (FMS) were achieved in isopropanol (IP) at 170 °C for 2 h, while FC and (tetrahydrofuran-2-yl)methanol (THFM) selectivity are 97.5% and 86.4% in water at 150 °C for 1 h. Over the same catalyst, LA was completely converted to γ-valerolactone in water at 95 °C for 0.5 h. The catalyst is still highly active after 6 cycles of recycling with 92.8% of FC and 100% of FMS in IP at 170 °C for 1.5 h and 90.1% of LA conversion and 100% of γ-valerolactone selectivity in water at 80 °C for 0.5 h.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
BIOMATERIALS
·
2017
·
IF 8.402
Dan Lin,Yanjun Chai,Yifan Ma,Bing Duan,Yuan Yuan,Changsheng Liu
Initiation of endogenous repair mechanisms, including key steps of stem cell recruitment and cartilage intermediate formation in endochondral ossification , is vital to regeneration of large bone defects. To biomimetically promote a rapid initiation and ensuing osteogenic stimulation, exogenous chemokine IL-8 and growth factor BMP-2 were orchestrated in a mesoporous bioactive glass (MBG)-based spatiotemporal delivery system, to achieve a rapid release of IL-8 followed by a long-term sustained release of BMP-2. The synergistic effect of IL-8 and BMP-2 on initiation stage of bone healing and underlying mechanism were thoroughly investigated in vitro and in vivo . Intriguingly, apart from its superiority in stem cell recruitment to BMP-2, IL-8 not only endowed a histological “prep-state” of endochondral ossification by up-regulating chondrogenic genes and inducing the formation of extensive cartilage tissues, facilitating rapid bone transformation by BMP-2, but also triggered a cellular “prep-state” with high expression of BMP receptors, enhancing the osteoinductivity of BMP-2. With the spatiotemporal delivery system, orchestrated signal stimuli of IL-8 and BMP-2 induced a rapid initiation including efficient stem cell recruitment and a “chondrogenic/osteogenic balance” at the first stage of endochondral ossification, and the scaffold facilitated sufficient osteoconductivity , together resulting in early extensive bone mineralization and an advanced regeneration throughout the repair of large bone defect. We believe this new idea could provide insights toward designing bone-repairing biomaterials with higher regenerative efficiency.
研究领域:
组织工程
·
再生医学
·
生物材料科学
·
骨科
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2019
·
IF 5.107
Atian Xie,Jiuyun Cui,Jin Yang,Yangyang Chen,Jihui Lang,Chunxiang Li,Yongsheng Yan,Jiangdong Dai
The oil/water emulsion separation has become a thorny problem worldwide. Membrane separation based on superwetting materials has attracted immense attention in the domain of oil/water separation, while the single wettability severely limits their applications for treatment of different types oily wastewater. In this work, ZIF-8 modified membrane (RC@PDA/ZIF-8) is prepared via coordination-driven in situ self-assembly ZIF-8 on polydopamine (PDA) coated regenerated cellulose membrane (RC). The surface wettability of resultant membrane can be switched between underwater superoleophobicity and underoil (super)hydrophobicity by water or oils prewetted without additional external stimuli, which is suitable for controllable oil/water emulsion separation. Moreover, this membrane also displays superior separation capacity as high as above 99% and good flux for various oil-in-water and water-in-oil emulsions. Furthermore, the membrane shows good recyclability that it can retain high separation efficiency (98.5%) and flux after at least 10 times cycles. Also, the controllable emulsion separation mechanisms are analyzed and elucidated in detail. This ZIF-8 modified membrane with easy preparation and simple operation exhibits excellent separation efficiency and recyclability for controllable oil/water emulsion separation. Our work demonstrates MOFs-based membrane has potential applications including controllable oil/water separation and fuel purification.
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
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jinhao Gao,Hanwen Wang,Zhiyuan Gao,He Gui,Yanxin Wang,Jianguo Tang,Linjun Huang
The flexibility, wide response range, and ultra-high sensitivity of flexible sensors make them suitable forwearable technology, automated manufacturing, and robotics. The development of raw materials for flexible sensors and the design of their source layer structures can address a range of issues. In this article, we aim to develop flexible sensors for wearable technology by preparing MXene/PVDF@ZIF-8 multilayer nanofiber membranes through electrospinning technology. By incorporating ZIF-8 particles into PVDF fibers through in situ electrospinning technology, flexible sensors with a rough structure were obtained. We similarly employed vacuum filtration technology to introduce MXene nanosheets into PVDF@ZIF-8 nanofibers, further constructing a conductive network with a multidimensional structure in the vertical direction of the film. The performance of the prepared MXene/PVDF@ZIF-8 composite fiber membrane pressure sensor was tested, revealing its wide working range (0–125 kPa), high sensitivity (25.8–77.9 kPa -1 ), load/unload Time (20 ms/30 ms), and strong mechanical stability. Various human movements and lying postures were simulated, confirming that the sensor can effectively provide feedback on external pressure applied to the skin. This also demonstrates the broad application prospects of the flexible sensor in the field of flexible wearables.
研究领域:
材料科学
·
传感器技术
·
纳米科技
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Wei Zeng,Sili luo,Da Rong,Yanlong Li,Yunying Fei,Meng Zhao,Linsheng Huang
A highly sensitive electrochemical sensor based on a composite of two-dimensional (2D) reduced graphene oxide (rGO) and three-dimensional (3D) zeolitic imidazolate framework-8 (ZIF-8) for detecting the NH4+ ion is reported. The ZIF-8/rGO composite electrode is in situ grown to be anchored on the Si/Ag substrate. Here, the rGO layer has high conductivity, while ZIF-8 has a large specific surface area, which provides a large number of active sites. This structure significantly increases the electrical conductivity and enhances the electrochemical performance. With a differential pulse voltammetry measurement at the pH value of 7.00, the multidimensional composite electrode with the optimal ZIF-8 structure exhibits a sensitivity of 9.30 μA μM–1, and a detection range of 5–50 μM with a low detection limit of 3.00 × 10–9 M, as well as high repeatability, stability, and selectivity. These results might be due to the oxidation reaction of NH4+ with the ZIF-8 framework and the special 2D–3D electron transfer channel formed by the composite.
研究领域:
材料科学
·
分析化学
✓ 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）