AICHE JOURNAL
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2015
·Vol. 62
·期 5
·1728-1739
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IF 2.748
Hao Zhang,Yan Wang
Ethanediamine-modified zeolitic imidazolate framework (ZIF)-8 particles (ZIF-8-NH 2 ) is synthesized and incorporated in the poly(vinyl alcohol) (PVA) matrix to fabricate novel PVA/ZIF-8-NH 2 mixed matrix membranes (MMMs) for pervaporation dehydration of ethanol. The PVA/ZIF-8-NH 2 MMMs exhibit enhanced membrane homogeneity and separation performance because of the higher hydrophilicity and restricted agglomeration of the particles, as compared to corresponding MMMs loaded with unmodified particles. The effect of ZIF-8-NH 2 loading in the MMMs is studied and the MMM with a 7.5 wt % ZIF-8-NH 2 loading shows the best pervaporation performance for ethanol dehydration at 40°C. Various characterization techniques (Fourier transform infrared, scanning electron microscope, contact angle, sorption test, etc.) are used to investigate the MMMs loaded with ZIF-8 and ZIF-8-NH 2 particles. The impact of operation conditions on pervaporation performance is also performed. The performance benchmarking shows that the MMMs have superior separation factors and comparable flux to most other PVA hybrid membranes. © 2016 American Institute of Chemical Engineers AIChE J , 62: 1728–1739, 2016
研究领域:
化学工程
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Hongfei Jia,Yangchen Wang,Lizi Yang,Ran Fang
Lithium metal, a pivotal element in modern electric vehicles and electronics, necessitates secure and sustainable supply chains. Extracting lithium from brines presents significant challenges, particularly when dealing with high magnesium-to-lithium ratios, due to the nearly identical ionic radii of lithium and magnesium ions. Herein, we propose an innovative strategy for the selective separation of Li + /Mg 2+ by integrating ZIF-8-NH 2 into polyamide membranes through the interfacial polymerization (IP) of polyethyleneimine (PEI) and trimesoyl chloride (TMC). The synthesized PEI@ZIF-8-NH 2 + TMC membranes exhibit an impressive permeation rate for Li + of 0.863 mol m -2 h -1 , alongside a Li + /Mg 2+ selectivity ratio of 33.06. The unique pore structure of ZIF-8-NH 2 and surface chemistry facilitate efficient Li + /Mg 2+ separation, driven by synergistic interactions such as elevated positive surface charges, subnanometer channels, and strong π-π stacking with polyamide layers. These developments are anticipated to augment both the selectivity and durability of MOF-based membranes, providing new directions for research and practical implementations in ion separation technology.
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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DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
·
IF 5.6
Wenfan Yu,Zhenxuan Liang,Shaoyu Luo,Qian Yan,Yi Sun,Yisheng Zhu,Shifeng Zhang
Metal-organic frameworks (MOFs) are highly advantageous due to their tunable pore size, exceptional thermal and chemical stability, and high specific surface area, making them ideal for applications in formaldehyde adsorption. However, the practical use of powdered MOFs is significantly hindered by their recycling challenges. In this research, wood-based composite aerogels (WAZN-X) were successfully prepared through loading Zeolitic Imidazolate Framework-8-NH 2 (ZIF-8-NH 2 ) inside wood aerogels. Ascribing to the elimination of lignin and hemicellulose, the enlarged pore structures of wood aerogels and the potential interactions (e.g., hydrogen bonding and electrostatic attractions) between components promoted the uniformly depositing of ZIF-8-NH 2 nanocrystals. The WAZN-X aerogels displayed excellent mechanical strength (e.g., the longitudinal Young’s modulus of 68.57 MPa) and promising formaldehyde adsorption performance (e.g., a stable formaldehyde removal rate of 98.11 %), and kept commendable reusability (95.98 % after 5 cycles). This research provides a new insight for developing high-value functional composite adsorbents for efficient formaldehyde purification.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2024
·Vol. 47
·期 7
·1071-1080
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IF 3.5
Sun Liqun,Xu Chaozhong,Tong Shanshan,Gu Xiaoli
This study investigates the immobilization of cellulase on zeolitic imidazolate frameworks (ZIFs) by physical adsorption, specifically the ZIF-8-NH 2 and Fe 3 O 4 @ZIF-8-NH 2 , to enhance enzymatic hydrolysis efficiency. The immobilization process was thoroughly analyzed, including optimization of conditions and characterization of ZIF carriers and immobilized enzymes. The impacts on the catalytic activity of cellulase under various temperatures, pH levels, and storage conditions were examined. Additionally, the reusability of the immobilized enzyme was assessed. Results showed the cellulase immobilized on Fe 3 O 4 @ZIF-8-NH 2 exhibited a high loading capacity of 339.64 mg/g, surpassing previous studies. Its relative enzymatic activity was found to be 71.39%. Additionally, this immobilized enzyme system demonstrates robust reusability, retaining 68.42% of its initial activity even after 10 cycles. These findings underscore the potential of Fe 3 O 4 @ZIF-8-NH 2 as a highly efficient platform for cellulase immobilization, with promising implications for lignocellulosic biorefinery.
研究领域:
生物化学
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酶工程
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DOI
PubMed
高影响因子
TALANTA
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2024
·
IF 5.6
Lei Pan,Fan Yang,Shihao Xu,Dan Lin,Changlong Jiang
Abnormal amount of dopamine (DA) in human body is closely relate to various diseases, such as Parkinson's disease, pheochromocytoma. Real-time monitoring DA is crucial for disease warning, diagnosis and treatment. Currently, most methods rely on invasive blood testing for detecting DA, which is only completed with the aid of the medical staffs in hospitals. Herein, a non-invasive fluorescence visual strategy is developed for the real-time monitoring DA, based on luminescent nanoparticles and modified mesoporous zeolite imidazole framework (ZIF-8-NH 2 ) dodecahedrons. During the reaction process, DA is enriched through the spatial configuration of ZIF-8-NH 2 and hydrogen bonding effect. The luminescence of Cr 3+ -doped zinc gallate (ZnGa 2 O 4 :Cr 3+ , ZGC) is inhibited by the photo-induced electron transfer (PET) mechanism to realize sensitively detecting DA. The intelligent sensing platform based on the designed fluorescence probe and color recognition system is structured for real-time detection of DA in urine. Furthermore, a skin-fitting hydrogel patch is prepared by combining a fluorescent probe with chitosan, which enables sensitive and accurate detection of DA in sweat without the complex sample pretreatment. The non-invasive fluorescence detection method provides an effective strategy for quantitatively monitoring DA in human fluids.
研究领域:
医学诊断
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生物传感
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Bo Xue,Chuanruo Yang,Miao Chang,Dahuan Liu
The development of a green, efficient, and reusable photocatalyst is of great importance for pollution remediation. Herein, a series of core-shell ZIF-8@NH 2 -MIL-125 composites (ZM-X) were prepared by epitaxial growth method. The in-situ homogeneous encapsulation of NH 2 -MIL-125 by ZIF-8 was achieved through the structural modulation, and the formed core-shell architecture exhibited outstanding synergistic effect of adsorption and photocatalysis for eliminating tetracycline hydrochloride (TCH), which dramatically enhanced the photocatalytic reaction rate. The results show that the TCH adsorption capacity of optimized ZIF-8@NH 2 -MIL-125 (ZM-2) is 70.25 mg g –1 , which can be fitted well the pseudo-second-order and Langmuir isotherm modes. Under 100 min of visible light irradiation, the ZM-2 has the best synergistic removal rate on TCH (92.9%) compared with other samples, which is 6.5 times higher than of pristine NH 2 -MIL-125 (14.3%). The results of quenching experiments and ESR analysis clearly demonstrate that the superoxide radical ( · O 2 – ) dominates the TCH photodegradation reaction. In addition, ZM-2 can effectively remove TCH in different types of water systems (e.g., ultrapure water, tap water, lake water and actual pharmaceutical wastewater) through adsorption-photocatalytic synergy. Therefore, the novel core-shell material designed in this study has significant potential for environmental purification applications.
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高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Chunlei Wang,Dawei Ji,Xuyong Tian,Hongye Lv,Xiuping Li,Tai Zhang,Haolong Xue,Chun Wang,Jingjing Yan,Changfa Xiao
Doping metal-organic frameworks into the casting solution is a common method for preparing mixed matrix membranes. However, metal-organic frameworks are prone to agglomeration and poor dispersion. This can lead to a decline in membrane performance. To address these issues, this work proposed “co-solvent synthesis and in-situ doping” strategy. In this strategy, N,N-Dimethylformamide, which was also the solvent in the casting solution, was chosen as the synthesis carrier for ZIF-8-NH 2 nanoparticles. The prepared ZIF-8-NH 2 suspension could be directly doped into the casting solution in situ. This process eliminated the drying and pre-dispersion steps. Research showed that with 0.5 wt% ZIF-8-NH 2 , the membrane's hydrophilicity significantly improved, with the water contact angle of 72.5°. The pure water flux reached 229 Lm −2 h −1 . Moreover, the retention rates of Congo Red and NaCl were 97.3 % and 3.5 % respectively, demonstrating excellent dye/salt separation. In particular, the flux recovery rate was maintained at more than 91 %, demonstrating good anti-fouling performance. This work provides a promising technical strategy for the efficient treatment of textile dyeing wastewater and resource recovery.
研究领域:
材料科学
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膜技术
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环境工程
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纳米材料
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分离科学
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DOI
高影响因子
Polymers
·
2026
·Vol. 18
·期 14
·1699
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IF 5.8
Yangjie Huang,Haixia Wang,Yiyuan Zhang,Yuhang Liu
Natural antioxidants are limited in food packaging due to poor stability and compatibility. A multifunctional film was successfully prepared via the incorporation of functional fillers into a guar gum/polyvinyl alcohol (GP) matrix. ZIF-8 was amino-functionalized to enhance rutin (Rt) loading, and the resulting ZIF-8-NH2@Rt was combined with purple sweet potato anthocyanins (PSPA) to fabricate a composite film for pork freshness monitoring. Compared with neat GP, the ZIF-8-NH2@Rt/PSPA/GP film showed a 30.6% increase in tensile strength and an elongation at break of 36.6%. The composite film also imparted exceptional UV-blocking capabilities, with light transmittance plummeting to 3.22% in the UVA region, 0.40% in the UVB region, and 47.53% within the visible light spectrum. The films displayed significant antioxidant properties, with DPPH and ABTS scavenging activities recorded at 73.27% and 67.64%, respectively. During pork storage, the film exhibited stable color changes. The G/R values corresponding to the limit of edibility were determined to be 0.78 and 0.67 for storage at 25 °C and 4 °C, respectively. The film was reusable for four cycles and extended the shelf life of pork by at least one day. These findings highlight the film’s considerable promise in the realm of smart food packaging and dynamic freshness tracing.
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Xiaoyun Wang,Keyi Wang,Xing Lv,Jiangwei Chen,Qingguo Li,Rizhi Chen,Huiqin Zhang,Yangming Cheng,Ting He,Zhaoliang Cui
The extracorporeal carbon dioxide removal (ECCO 2 R) system is a life-support technique that has been shown to facilitate a protective ventilation strategy. When the lung disease cannot remove carbon dioxide (CO 2 ) in time, resulting in CO 2 retention, ECCO 2 R is used to remove the excess CO 2 . As the key component of the artificial lung, the gas transport performance of the membrane determines the CO 2 removal capacity of the membrane lung, which should present high CO 2 selectivity to increase the efficient CO 2 removal rate. In this study, a biomimetic metalloenzyme, ZIF-8-NH 2 , was prepared to mimic the function of carbonic anhydrase (CA). The pore in ZIF-8-NH 2 was constructed to act as gas channel, in order to enhance the CO 2 /O 2 selectivity. ZIF-8-NH 2 /Pebax, which has functions similar to those of CA and gas channel (AQP1), was coated on the surface of poly(4-methyl-1-pentene) (PMP) membranes to fabricate the composite membrane. The results confirmed that the CO 2 /O 2 selectivity of the ZIF-8-NH 2 /Pebax composite membrane was 7.4, which was 7.5 times higher than that of the pristine PMP membrane (1.0). The protein adsorption and thrombin time were 35.5 % lower and 34.4 % higher than those of PMP hollow fiber membrane (44.9 μg/cm 2 and 27.6 s), respectively. These results demonstrated that the prepared composite membrane possessed good blood compatibility. Additionally, an in-vitro blood circulation device was established to comparatively evaluate the hemocompatibility and CO 2 removal efficiency of PMP and the composite membrane modules under dynamic blood flow. Meanwhile, the corresponding results exhibited that the modified coating has good biosafety, implying that the mentioned materials can be safely applied in clinical trials.
研究领域:
生物医学工程
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膜科学
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仿生材料
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人工肺技术
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气体分离
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DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 26
·68691-68700
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IF 5.8
Liu Yuhao,Wang Jieqi,Wang Xuyi,Chen Jiayue,Zhang Beibo,Chen Liping,Zheng Dan,Cheng Ming
It is a great challenge to develop photocatalysts for the degradation of organic pollutants in the aqueous environment, especially those with excellent catalytic performance under visible light conditions. In this work, using graphene oxide (GO) as an electron shuttle agent and carrier, a hybrid of ZIF-8/NH 2 -MIL-125(Ti) and GO (ZIF-8/NH 2 -MIL-125(Ti)/GO) was prepared by a simple two-step solvothermal method. The morphology, structure, and combination of the synthesized catalysts were studied. The results showed that graphene oxide and ZIF-8 formed an in situ load on NH 2 -MIL-125(Ti). The construction of hybrid materials significantly improved the catalytic activity of NH 2 -MIL-125(Ti) in the visible light range. The degradation activity of the synthesized catalyst was further tested with reactive red dye. The results showed that the catalyst exhibited excellent catalytic removal efficiency for active red, with a degradation rate of 99.8% within 2 h. The prepared hybrid materials have good application prospects in the field of organic pollutant treatment in water. Graphical Abstract
研究领域:
材料科学
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环境科学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）