RSC Advances
·
2020
·Vol. 10
·期 57
·34381-34386
·
IF 3.119
Lele Chen,Jinghao Tian,Huaxing Song,Zhaohua Gao,Haisheng Wei,Wenhua Wang,Wanzhong Ren
Hydroformylation of olefins is one of the most important industrial processes for aldehyde production. Therein, the leaching of active metals for heterogeneous catalysts is an important issue in the hydroformylation reaction, particularly for higher olefins to produce higher alcohols. Here, different Rh/ZnO catalysts with diverse ZnO as a support were investigated and a home-made ZnO50 support was selected to prepare the Rh/ZnO50@ZIF-8 core–shell structure catalyst, which was synthesized by the growth of ZIF-8 with ZnO50 as the sacrificed template to afford Zn source. Compared with the Rh/ZnO50 catalyst, the Rh/ZnO50@ZIF-8 catalyst demonstrated a better cyclic stability in the hydroformylation of 1-dodecene. Combining the experiment and characterization results, it was concluded that the ZIF-8 shell on the Rh/ZnO50 catalyst effectively prevented the leaching of metal Rh into the reaction solution. Moreover, the Rh/ZnO50@ZIF-8 catalyst exhibited good universality for other higher olefins. This work provides a useful guideline for immobilizing the active species in heterogeneous catalysts for the hydroformylation reaction.
研究领域:
催化
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化学工程
·
材料科学
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DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yingying Cheng,Yuanye Zhuang,Shiyang Bai,Meng Ge,Jihong Sun,Jingjing Sun,Xufeng Gong
The removal of CO2 from biogas is critically important for environmental protection and energy applications yet remains technically challenging in the chemical industry. In this work, novel composite adsorbents featuring ZIF-8 uniformly dispersed on randomly oriented clinoptilolite lamellae (LCP) were designed and fabricated through a straightforward composite method. The synthesis sequentially incorporated metal precursors into LCP via ion exchange and salt addition and then introduced organic ligands to generate ZIF-8. Comprehensive characterizations, including XRD, FT-IR, N2 adsorption–desorption isotherms, SEM, and TG analyses, confirmed the physicochemical properties and structural features of the composites. The synthesized Zn-LCP/ZIF-8 materials exhibited exceptional CO2/CH4 separation performance, demonstrating ultralow CH4 adsorption capacity (<0.1 mmol/g) coupled with superior CO2/CH4 selectivity (≈28). Complementary molecular simulations using Material Studio software provided mechanistic insights into the adsorption and separation behavior, which further confirmed the superiority of the composite structure in CO2/CH4 separation. These results establish an effective strategy for biogas purification, while offering new perspectives for enhancing the CO2/CH4 adsorption selectivity.
研究领域:
环境科学
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能源技术
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材料科学
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化学工程
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吸附
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xiqing Liu,Tao Wang,Yongqing Wang
Fluorescence technology enabled highly sensitive, real-time and multi-scenario detection of lysozyme (Lys). However, fluorescent nanomaterials suffer from aggregation-induced quenching, environmental interference and lack of selective recognition capability. In this work, the ZIF-8 was used as a framework to support red and blue fluorescence quantum dots for constructing ratiometric fluorescence sensor. At the same time, combined with molecular imprinting technology, a Molecular Imprinting Polymers (MIPs)-based ratiometric fluorescence sensor was designed for improving the sensitive and selective. The MIPs-based ratiometric fluorescence sensor exhibited highly sensitively and selectively for the detection of lysozyme. Benefited from ratiometric design, the sensor could realize the effect of visual detection of Lys and the limit of detection (LOD) was reached 0.048 mg/L. The HPLC method was used to further confirm the sensor has the potential for practical application. Furthermore, to the demand of an affordable and portable strategy for visual detection Lys, a dexterous and inexpensive test paper was made in this work.
研究领域:
分析化学
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纳米技术
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荧光传感
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材料科学
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生物传感
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Yang Chen,Chengyin Yang,Xiaoqing Wang,Jiangfeng Yang,Jinping Li
Solvent-evaporated conversion (SEC) and steam-assisted conversion (SAC) have been developed to prepare the typical metal-organic frameworks (MOFs) Cu-BTC (HKUST-1) and ZIF-8 using a unique solvent recovery strategy using zeolite. As a green circulation medium, zeolite Na-4A loading and removal of solvent (H 2 O and EtOH) can transport solvent in the vapor phase and avoid solvent condensation, which was the defect in previous SAC syntheses of MOFs, and achieves efficient solvent recovery as well as being an economical and green synthetic process. Moreover, SEC and SAC processes exhibited different mechanisms during the multi-stage reaction and solid diffusion reaction, respectively and both can synthesize the desired products in 12 h. These two methods for MOFs preparation were characterized in detail using XRD, SEM and N 2 adsorption during the different growing stages. According to polar molecules (H 2 O and EtOH) steam-assisted in those synthesis, polar destruction molecules (H 2 O, NH 3 ) adsorption and stability of Cu-BTC and ZIF-8 was investigated.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 13
·1909389
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IF 16.836
Xiaoxue Yao,Guoshuai Zhu,Pingan Zhu,Jing Ma,Wenwen Chen,Zhou Liu,Tiantian Kong
Bacterial adhesion and colonization can result in chronic non-healing wounds. Current hydrophilic wound dressings can release antibacterial agents into the wound exudate, but may result in overhydrated wounds, bacterial overgrowth, and even tissue maceration. Hydrophobic dressings are anti-fouling, though ineffective to encapsulate and release bactericidal agents. Combining the advantages of hydrophilic and hydrophobic dressings seems difficult, until the development of superwettability surfaces offers an opportunity for omniphobic dressings from intrinsic hydrophilic polymers. Herein, omniphobic porous hydrogel wound dressings loaded with a zinc imidazolate framework 8 (ZIF-8) are fabricated by a microfluidic-emulsion-templating method. The fabricated porous hydrogel membrane with its reentrant architecture is repellent to blood and body fluids, though intrinsically hydrophilic. This unique combination not only reduces the adhesion of harmful microbes, but also enables the encapsulation and release of antibacterial ingredients to wounded sites from hydrophilic polymer networks. As such, the omniphobic metal-organic frameworks (MOFs)@hydrogel porous wound dressing can inhibit bacteria invasion and enable the controlled release of the bactericidal, anti-inflammatory, and nontoxic zinc ions. Furthermore, in vivo study of infected full-thickness skin defect models demonstrates that the dressing also accelerates wound closure by promoting angiogenesis and collagen deposition. Therefore, the omniphobic MOFs@hydrogel porous wound dressings are potentially useful for clinical application.
研究领域:
材料科学
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生物医学工程
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伤口护理
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纳米技术
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DOI
高影响因子
MOLECULES
·
2019
·Vol. 25
·期 1
·124
·
IF 3.06
Sufeng Zhang,Yongshe Xu,Dongyan Zhao,Wenqiang Chen,Hao Li,Chen Hou
A facile approach was successfully developed for synthesis of cellulose nanocrystals (CNC)-supported magnetic CuFe2O4@Ag@ZIF-8 nanospheres which consist of a paramagnetic CuFe2O4@Ag core and porous ZIF-8 shell. The CuFe2O4nanoparticles (NPs) were first prepared in the presence of CNC and dispersant. Ag NPs were then deposited on the CuFe2O4/CNC composites via an in situ reduction directed by dopamine polymerization (PDA). The CuFe2O4/CNC@Ag@ZIF-8 nanocomposite was characterized by TEM, FTIR, XRD, N2adsorption-desorption isotherms, VSM, and XPS. Catalytic studies showed that the CuFe2O4/CNC@Ag@ZIF-8 catalyst had much higher catalytic activity than CuFe2O4@Ag catalyst with the rate constant of 0.64 min−1. Because of the integration of ZIF-8 with CuFe2O4/CNC@Ag that combines the advantaged of each component, the nanocomposites were demonstrated to have an enhanced catalytic activity in heterogeneous catalysis. Therefore, these results demonstrate a new method for the fabrication of CNC-supported magnetic core-shell catalysts, which display great potential for application in biocatalysis and environmental chemistry.Keywords:CuFe2O4nanoparticles;cellulose nanocrystals;Ag nanoparticles;ZIF-8 catalysis;4-nitrophenol reduction
研究领域:
材料科学
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环境化学
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催化化学
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产品关联
DOI
PubMed
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2018
·Vol. 645
·期 2
·73-78
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IF 1.179
Xufei Li,Bo Tang,Weiqiu Huang,Haogang Yu
Zeolite imidazolate frameworks (ZIFs) represent a class of metal-organic frameworks (MOFs) for various potential applications due to their outstanding properties. However, to date, the creation of nanoframes with tunable structure faces a challenge. Herein, we develop a facile and efficient physical method that allows the preparation of ZIF-90 with controllable surface area. In this study, the effect of various stirring time and speed in the acceleration of the precursor dissolution are revealed. The study shows that a moderate stirring speed (640 r · min –1 ) and reaction time (6 h) are the optimal conditions to synthesize ZIF-90 with a high adsorption capacity. More importantly, the maximum adsorption amount of n -hexane is up to 211 mg · g –1 by using this as-prepared sample, which increases by 60 % in comparison with that of the minimum from other sample (133 mg · g –1 ).
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Rashida Shahbaz,Tianyou Li,Yongchao Sun,Samrina Sharif,Gaohong He,Canghai Ma
Mixed matrix membranes (MMMs) have emerged as promising materials for hydrogen separation, combining the processability of polymers with enhanced permeability and selectivity offered by inorganic fillers. However, challenges such as filler aggregation and poor polymer-filler interfacial compatibility limit their performance. In this study, amino-modified bimetallic ZIF (Zn/Co-ZIF-NH 2 ) was synthesized and employed as a novel nanofiller to fabricate 6FDA-DAM-based MMMs, aiming to improve interfacial compatibility between the filler and the polymer matrix. The incorporation of Co 2+ ions into ZIF-8-NH 2 introduced a synergistic effect, optimizing the balance between the rigidity and flexibility of metal-to-ligand bond linkage, while amino groups promoted robust interfacial interactions with the polymer matrix. Compared to the pure polymeric membrane, the MMMs incorporating 40 wt% MOF exhibited a significant enhancement in gas permeability, with H 2 permeability rising from 750 to 3273 Barrer and CO 2 permeability increasing from 840 to 2733 Barrer, corresponding to improvements of 336.4 % and 225 %, respectively. Simultaneously, H 2 /CH 4 and CO 2 /CH 4 selectivities increased to 33.7 and 28.1, representing improvements of 88.3 % and 41 % over the pristine polymer. These performance metrics exceed the 2008 Robeson upper bounds, demonstrating the effectiveness of Zn/Co-ZIF-NH 2 nanofillers in overcoming the permeability–selectivity trade-off. This study underscores the effectiveness of amino-modified bimetallic MOFs as advanced fillers for high-performance MMMs, particularly suited for hydrogen purification and CO 2 separation applications.
研究领域:
材料科学
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化学工程
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膜技术
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气体分离
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2025
·
IF 5.2
Siqi Chen,Yizhen Yan,Jiayi Zou,Xin He,Kexin Li
Multi-modal combination therapy for tumors can overcome the limitations of single-modal therapy and bring new opportunities for high-efficient tumor treatment. Nevertheless, how to ingeniously design functionalized nanocarriers to mediate the synergistict effects among various therapeutic approaches remains a core challenge. In this study, we developed a polydopamine (PDA) coated outside and glucose oxidase (GOx) adsorbed inside copper-doped zeolitic imidazolate framework-8 (CZ8) with metformin hydrochloride (MET) / doxorubicin (DOX) as a multifunctional nano-codelivery system, abbreviated as PMDGCZ8, which could focus more on the synergy and continuity of multiple therapies including photothermal therapy (PTT), chemodynamic therapy (CDT), starving tumor therapy (STT) and chemotherapy (CT). Herein, PMDGCZ8 innovatively combined the gating effect of PDA membrane with the pH sensitivity of CZ8 skeleton to form a dual-responsive bomb that could trigger release on demand and significantly improve the accuracy of tumor localization. Furthermore, we also incorporated the strategies of reshaping the tumor hypoxia and immunosuppressive microenvironment into the synergistic treatment process in order to achieve a comprehensive anti-tumor ecological network. Both in vitro and in vivo experiments suggested that PMDGCZ8 significantly enhanced drug accumulation on tumors, reduced systemic toxicity, activated anti-tumor immune response, further inhibited the recurrence and metastasis, and consequently was expected to become a new type of nano-delivery platform with great development potential.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Cai Haopeng,Chen Yangdie,Feng Chaochao,Lin Zhenqin
Aimed to address the poor impedance matching of pure tetra-needle ZnO (T-ZnO) as well as to optimise the structure of the wave-absorbing material, this research focused on constructing a bimetallic Zn/Co-ZIF-coated T-ZnO core–shell structure with T-ZnO as a self-sacrificial template. In this work, T-ZnO@Zn/Co-ZIF composites were synthesized by optimizing shell uniformity via modulating DMF/H 2 O solvent ratios (3:1 to 1:1 v/v) and reaction durations (6/24 h). By further pyrolysis, the formation of hollow structures of the derivatives was investigated and the electromagnetic wave absorption performance of the derived materials were evaluated. Optimal core–shell uniformity was achieved at DMF/H 2 O = 3:1 with 24 h reaction time (DH31-24). Pyrolysis at 800 °C (PDH31-24-800) produced hollow Co/C derivatives with complete ZnO volatilization. This material exhibited superior microwave absorption: minimum RL of − 16.40 dB at 14.00 GHz (3.00 mm thickness) and an effective bandwidth (RL ≤ − 10 dB) of 4.48 GHz (11.12–15.60 GHz).
研究领域:
材料科学
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纳米复合材料
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电磁功能材料
·
无机非金属材料
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 2
·4123-4136
·
IF 5.19
Li Jiacheng,Tian Tian,Jia Yannan,Xu Nannan,Yang Shujun,Zhang Chenyue,Gao Shiwei,Shen Wei,Wang Zheng
Herein, an iron-doped ZIF-8-loaded multi-walled carbon nanotube (FZM) was synthesized and its adsorption performance on tetracycline (TC) was investigated. The experimental conditions (solution pH, temperature, adsorbent dose) were optimized by Box–Behnken design (BBD) in response surface methodology (RSM). The results show that the adsorption effect of TC by FZM is optimal under the conditions of temperature = 298 K, pH = 6, and contact time = 360 min. The adsorption processes of TC by FZM follow the pseudo-second-order (PSO) kinetic and Freundlich isotherm models, indicating that chemisorption is the dominant factor and the adsorption reaction is multi-layer, with a theoretical maximum saturation capacity of 1111.11 mg/g at 298 K. The adsorption thermodynamic results indicate that the adsorption of TC by FZM is a spontaneous and endothermic process. The mechanism of TC adsorption by FZM possibly occurs through hydrogen bonding, surface complexation, π–π interaction, and electrostatic interaction. From the statistical results, the optimal adsorption capacity of TC by FZM is 599.78 mg/g at a pH of 7.1, a temperature of 312.5 K, and an adsorbent dose of 64.43 mg/L, with a deviation of 1.73% from the actual value. Furthermore, regeneration experiments demonstrate that FZM has excellent reusability with a 15% loss of adsorption capacity after four cycles. This study provides some insights to study the adsorption behavior of TC by MOFs and the optimization of the adsorption experimental conditions, and also shows the potential of FZM for TC removal.
研究领域:
环境化学
·
材料科学
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污染控制工程
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吸附科学
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药物去除
·
纳米复合材料
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 16
·24113-24128
·
IF 0
Ma Xiaoxiao,Li Yutong,Du Yile,Chen Shuangli,Bai Yunfan,Li Lin,Qi Chuhua,Wu Pingping,Zhang Sijing
The presence of organic dyes in aquatic systems poses a significant threat to ecosystems and human well-being. Due to recycling challenges, traditional commercial activated carbon is not cost-effective. To address this, an imidazolate acid zeolite framework-8 (ZIF-8)-modified magnetic adsorbent (ZMPLB-800) was synthesized through the in-situ formation of ZIF-8 and subsequent carbonization at 800 °C, using magnetic pineapple leaf biochar (MPLB) as a carrier. The porous structure of ZMPLB-800 facilitates the rapid passage of dye molecules, enhancing adsorption performance. ZMPLB-800 exhibited remarkable adsorption capacity for methylene blue (MB) across a pH range of 3–13, with a maximum adsorption capacity of 455.98 mg g −1 . Adsorption kinetics and thermodynamics followed the pseudo-second-order kinetic model and Langmuir isotherm model. Mechanisms of MB adsorption included pore filling, hydrogen bonding, electrostatic interactions, π-π interactions, and complexation through surface functional groups. Additionally, ZMPLB-800 demonstrated excellent regeneration performance, recording a removal efficiency exceeding 87% even after five adsorption/desorption cycles. This study provides a novel strategy for treating dye wastewater with MOF composites, laying the foundation for waste biomass utilization. Graphical
研究领域:
环境科学
·
材料科学
·
化学工程
·
纳米技术
✓ 已验证
DOI
危险品化学品经营许可证（带存储）