TALANTA
·
2020
·
IF 5.339
Chang Ping Yang,Li He,Cheng Zhi Huang,Yuan Fang Li,Shu Jun Zhen
Due to the ultra-weak and instantaneous chemiluminescence (CL) of luminol–H 2 O 2 system, developing new catalysts to dramatically enhance and produce persistent CL emission is crucial. In this study, the Cu-metal-organic frameworks (Cu–MOFs) with flower morphology converted from Cu-based metal-organic gels (Cu–MOGs) could catalyze luminol–H 2 O 2 system, exhibiting persistent CL. The possible mechanism of this persistent emission of luminol was attributed to the gradual generation of OH˙, O 2 ˙ − and 1 O 2 in Cu–MOFs–catalyzed luminol–H 2 O 2 system. In addition, OH˙ and O 2 ˙− were continuously recombined into singlet oxygen on the surface of Cu–MOFs which further prolonged the duration time of the CL leading to the persistent emission, due to the longer lifetime of 1 O 2 compared to OH˙ and O 2 ˙ − . Furthermore, based on the high-intensity emission of Cu–MOFs–catalyzed luminol–H 2 O 2 system, the strategy for sensitive response to quercetin was established with good linearity within the range of 0.05–1.2 μM and a detection limit of 49.7 nM. This study provides a new idea for developing persistent CL catalysts.
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PubMed
高影响因子
Journal of Energy Chemistry
·
2020
·
IF 7.216
Xiao Liu,Peijie Fan,Liangping Xiao,Jian Weng,Qingchi Xu,Jun Xu
The generation of green hydrogen (H 2 ) energy is of great significance to solve worldwide energy and environmental issues. Reduced Ti based photocatalyst has recently attracted intensive attention due to its excellent photocatalytic activity, while the synthesis of reduced Ti based photocatalysts with high stability is still a great challenge. Here, we report a facile method for synthesis of reduced Ti metal organic frameworks (small amounts of Pt incorporated) encapsulated BP (BP/R-Ti-MOFs/Pt) hybrid nanomaterial with enhanced photocatalytic activity. The strong interaction between Ti and P reduces the valence state of the binding Ti 4+ on the BP surface, forming abundant reduced Ti 4+ within R-Ti-MOFs/BP. Such reduced Ti 4+ render R-Ti-MOFs/BP efficient charge transfer and excellent light absorption capability, thus promote the photocatalytic H 2 production efficiency. Furthermore, the Ti-P interaction stabilizes both reduced Ti 4+ and BP during the photocatalytic reaction, which greatly enhanced the stability of the obtained BP/R-Ti-MOFs/Pt photocatalyst.
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高影响因子
INORGANIC CHEMISTRY
·
2020
·
IF 4.825
Li Zhong,Junyang Ding,Xian Wang,Lulu Chai,Ting-Ting Li,Kongzhao Su,Yue Hu,Jinjie Qian,Shaoming Huang
The rapid development of suitable and cheap water oxidation catalysts is of great significance in energy conversion and storage. In this context, herein we have synthesized two different types of metal–organic frameworks (MOFs, denoted as BMM-11 and BMM-12) constructed from the same metal salts (cobalt nitrate) and organic linkers (H4BPTC) at the similar solvothermal conditions. Interestingly, we learned that both crystalline materials can be conveniently converted into each other by a single-crystal-to-single-crystal transformation method at their corresponding synthetic conditions. Meanwhile, we applied them directly as electrocatalysts into OER application where the pure BMM-11 and BMM-12 can achieve a stable current density of 10 mA cm–2 with an overpotential of 0.362 and 0.393 V, respectively, during which MOF degradation unexpectedly occurs. After electrolysis, the following microscopic, spectroscopic, as well as electrochemical measurements confirm that these initial MOF precursors are rapidly transformed into the mixed phases of CoOxHy species consisting of CoOOH and Co(OH)2, which are essentially active components for OER performance. Finally, we have also considered other strategies to improve MOF-derived composites in oxygen evolution activity, including bimetallic doping and physical grinding strategy. The approach described here can further be extended to other cobalt-based MOFs-derived electrocatalysts for water splitting.
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PubMed
高影响因子
POLYHEDRON
·
2024
·
IF 2.4
Yuxiu Gong,Bei Zhao,Ning Wang,Shuaihua Jiang,Haibin Yu,Peng Liang,Tiantian Jiao,Bu Xu,Xing Fan,Guoming Zhao
The catalytic hydrogenation of aromatic nitro compounds under mild conditions to generate amino compounds is a great challenge in terms of conversion, selectivity and stability. In this paper, two classes of nitrogen-doped carbon coated nickel nanoparticles, coined Ni@NC-P and displaced Ni@NC-T were prepared by high-temperature pyrolysis of MOFs using inexpensive terephthalic acid and high-priced trimesic acid as carbon source, respectively. One from the former class, namely the Ni@NC-P-500 catalyst, exhibits the best catalytic performance, which is superior to Ni@NC-T-500 Samples. For the selective hydrogenation of p -nitrophenol under mild conditions (60 °C, 2 h), the Ni@NC-P-500 catalyst shows >99.9 % conversion of p -nitrophenol and >99.9 % selectivity for p -aminophenol and can be recycled five times without obvious decrease of conversion and selectivity, thanks to its larger specific surface area (382.02 m 2 ·g −1 ), smaller nickel particle size (8.2 nm), higher nitrogen content (especially pyridine nitrogen), higher electron-rich nickel content and less hydrophilic properties than that of the Ni@NC-T-500. The excellent stability and recyclability of the catalysts are mainly attributed to their core–shell structure, i.e., zero-valent nickel nanoparticles encapsulated within a nitrogen-doped carbon layer with an appropriate microporous structure, whereas zero-valent nickel nanoparticles have the ability to activate dihydrogen and block dioxygen.
研究领域:
材料科学
·
催化化学
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DOI
高影响因子
Catalysis Science & Technology
·
2024
·
IF 4.4
Zafar A. K. Khattak,Nazir Ahmad,Hussein A. Younus,Habib Ullah,Baoyi Yu,Khurram S. Munawar,Muhammad Ashfaq,Muhammad Yaseen,Muhammad Danish,Mohammed Al-Abri,Rashid AlHajri,Francis Verpoort
Metal(II)-carboxylate frameworks are an important class of MOF materials finding applications in gas storage, separation, sensing, catalysis, etc. Recently, their design, synthesis and characterization have been established at a very fast pace. Here two novel MOFs based on 5,5′-(([1,1′-biphenyl]-4,4′-dicarbonyl)bis(azanediyl))diisophthalic acid (H4L, an amide containing ligand) and transition metals (copper and zinc) are reported. Several characterization tools e.g., FT-IR, XRD, SEM, TGA, and XPS are used to characterize these MOFs. Single-crystal X-ray diffraction and Hirshfeld surface analyses are used to characterize the 3D structural framework. The void and cavity analysis revealed the strength of the crystal packing. Both MOFs followed multistage thermogravimetric disintegration profiles. The solvent molecules escaped around 200 °C and the structural changes due to decompositions in the frameworks continued till 500 °C. The morphological analysis for Zn-MOF and Cu-MOF showed uniform wedge-shaped rectangular blocks and spherical balls with dimensions around 100 and 50 μm, respectively. The amide functionalized Zn(II)-carboxylate framework exhibited high catalytic activity (85–>99%) towards the solvent-free cycloaddition of CO2 to different epoxides e.g., epichlorohydrin, propylene oxide, allyl glycidyl ether and glycidyl isopropyl ether with 100% selectivity under ambient conditions (i.e., 1 bar at 40 °C for 24 h) at very low catalyst loading. By adjusting the reaction conditions (T, P, and co-catalyst), the catalytic conversion reached 100% within only 2 hours. The results showed Zn-MOF as a superior and efficient catalyst compared to other reported MOFs. Additionally, the catalyst can be easily recovered and regenerated for repeated use without performance loss.
研究领域:
材料科学
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催化化学
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环境科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Chaofan Yao,Qian Wu,Yu Zhao,Hongbin Li,Jinmei He,Li Liu,Yudong Huang,Feng Cheng
Wound bacterial infections not only impede the healing process but can also give rise to a range of serious complications, thereby posing a substantial risk to human health. Developing effective wound dressings incorporating phototherapy functionalities, specifically photothermal therapy (PTT) and photodynamic therapy (PDT), remains a critical area of research in modern wound care. Existing PTT-PDT systems often suffer from challenges such as nanoparticle aggregation and inefficient reactive oxygen species (ROS) generation, which are essential for therapeutic efficacy. This study presents a pioneering approach by combining zeolitic imidazolate framework derivatives (ZIFs) and Au NPs in a silk fibroin (SF) hydrogel for the first time. This combination not only prevents particle aggregation but also significantly enhances photothermal conversion efficiency and ROS generation capacity. The digital light processing (DLP) printability of our hydrogel allows for customized wound dressings tailored to individual patient needs, improving therapeutic efficacy. The hydrogel's effectiveness was evaluated through rigorous in vivo experiments, demonstrating enhanced antibacterial properties and accelerated wound healing. The biocompatibility of our hydrogel ensures its suitability for clinical applications, minimizing adverse reactions while promoting healing. A wound healing rate of 99.06 % represents a substantial improvement over the control groups, indicating markedly enhanced therapeutic efficacy. These findings underscore its multifunctionality in addressing infected wounds, presenting a promising strategy for facilitating the rapid healing of acute complex wounds in clinical applications.
研究领域:
生物医学工程
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材料科学
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医学
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DOI
PubMed
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2024
·
IF 3.9
Nan Jiang,Boyu Du,Di Gao,Zengbin Chai,Chao Liu,Xing Zhu
Herein, we synthesize the ZnAl-LDHs/NH 2 -MIL-125 composite via in situ growth of Ti-based metal–organic framework (MOFs) using layered double hydroxide (LDHs) as a carrier. The composite exhibits excellent performance for As(V) removal, achieving an adsorption capacity of 1634.0 mg/g in wastewater with an As(V) concentration of 1500 mg/L at pH of 10. The porous flower-like structure of the composite inherits the benefits of both the spatial structure of MOFs and the arsenic-affinity of LDHs. This results in an abundant active surface containing –OH, –NH 2 , M–O–M, and –COO– species, collectively contributing to As(V) adsorption. The adsorption progress governing As(V) removal follows the Langmuir isotherm and pseudo-second-order (PSO) kinetic models, revealing a monolayer and chemisorption mechanism. This study showcases the feasibility of the in situ growth of a MOF on LDHs to synthesize high-capacity adsorbents, offering a potential solution for As(V) removal from wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2019
·
IF 3.372
Donghui Liu,Long Xiang,Hao Chang,Ke Chen,Chongqing Wang,Yichang Pan,Yanshuo Li,Zhongyi Jiang
Mixed matrix membranes (MMMs) have attracted tremendous attention in the field of gas separation, which adopts the synergistic advantages of the polymer and inorganic phase. However, the MMMs rarely generate sufficient selectivity for energy-efficient gas separation, even if the dispersed molecular sieve is highly selective. Here, an unprecedented improvement (∼4.5-fold) of both C 3 H 6 /C 3 H 8 permeability and selectivity on the crosslinked poly(ethylene oxide) (XLPEO) membranes containing ZIF-8 nanocrystals. When the ratio of polymer-to-sieve permeability ( R c/d ) is in the range of 0.004–0.36, both C 3 H 6 /C 3 H 8 permeability and selectivity increases with the ZIF-8 loading, and the separation performance on MMMs can approach and surpass the-state-of-the-art polymer upper bound. Besides C 3 H 6 /C 3 H 8 separation, the universality of this proposed polymer-sieve matching law is suitable for other gas-pairs on MOF-based MMMs.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
Acta Biomaterialia
·
2022
·
IF 10.633
Yang Wang,Danni Jing,Jiawen Yang,Shajun Zhu,Jian Shi,Xiru Qin,Wujie Yin,Jin Wang,Yue Ding,Tingting Chen,Bing Lu,Yong Yao
Carbon monoxide (CO) as one of the therapeutic gaseous molecules has been widely applied for treating various diseases, especially in cancer therapy. However, the in situ-triggered and efficient transport of CO to tumors are the primary obstacles that limit its clinical applicability. To address this obstacle, herein, a H 2 O 2 -triggered CO gas releasing nanoplatform has been designed by embedding manganese carbonyl (MnCO) into Zr (IV)-based metal-organic frameworks (MOFs). The porous structures of MOFs provide encapsulation capacity for glucose oxidase (GOx) loading, thereby catalyzing the endogenous glucose into gluconic acid and H 2 O 2 to accelerate CO release and energy depletion. In the meantime, the Mn 2+ produced by MnCO can react with intracellular H 2 O 2 via the Fenton reaction to form cytotoxic •OH. Therefore, the synthesized gas nanogenerator demonstrated a synergistic efficacy of CO gas therapy, reactive oxygen species (ROS)-mediated therapy, and energy starvation to prevent tumor growth. Both in vitro and in vivo studies indicated that this multifunctional nanoplatform not only successfully inhibited tumors through a synergistic effect, but also provided a new technique for the creation of starvation/gas/chemodynamic combination therapy in a single material. Statement of significance In this study, we developed a H 2 O 2 responsive CO gas nanogenerator to augment the in-situ generation of CO gas for combined modality therapy of tumors. The nanogenerator was constructed by encapsulating glucose oxidase (GOx) and manganese carbonyl (MnCO) into UiO-67-bpy, which can catalyze the conversion of intracellular glucose to H 2 O 2 for cutting off energy supply of cancer cells. Meanwhile, the cumulated H 2 O 2 can trigger the release of CO for gas therapy and generation of •OH for chemodynamic therapy (CDT) via the Fenton-like reaction, thereby resulting in apoptosis of the cancer cells. Collectively, our designed nanotherapeutic agent not only displays the synergistic therapy efficacy of starvation-enhanced CO gas therapy and CDT, but also provides an efficient strategy for developing the intelligent nanocarrier for CO gas delivery and release.
研究领域:
癌症治疗
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材料科学
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生物医学工程
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化学
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DOI
PubMed
高影响因子
Materials Research Express
·
2018
·Vol. 5
·期 3
·036416
·
IF 1.151
Yating Wang,Xiu Dai,Xu Li,Xinlong Wang
In this article, metal organic frameworks (MOFs) material is introduced in the poly (lactic acid) (PLA) by electrospinning to fabricate the nanocomposite membrane. The acrylic acid (AA) is grafted onto the membrane under UV light. The prepared membrane is studied by scanning electron microscopy (SEM), x-ray diffraction (XRD), thermogravimetry (TG), contact angle test and tensile strength test. The SEM image and XRD indicate that nano MOFs particles adhere to the membrane. Contact angle test shows that grafting AA on the composite fiber membrane improves its hydrophilicity effectively. TG analyses show that the particulate matter (PM) capture capacity of PLA membrane with 2 wt% ZIF-8 content is 22%, which rises to 37% after grafting.
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
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Wenji Zheng,Ziheng Li,Tianqi Sun,Xuehua Ruan,Yan Dai,Xiangcun Li,Chuling Zhang,Gaohong He
Metal organic frameworks (MOFs) based mixed matrix membrane (MMM) for CO 2 capture shows insufficient CO 2 permeability due to random disperse of MOFs in form of individual particle. Therefore, in this work, a continuous MOFs transport pathway for CO 2 with low resistance was constructed in the MMM by assistance of electrospun nanofiber . Specifically, PAN electrospun nanofiber mat (NFM) was utilized as skeleton to obtain continuous ZIF-8 nanofibers. Then flexible polyethylene glycol (PEG) molecules were photo-polymerized in situ into the inner-voids within ZIF-8@PAN NFM to form dense membrane . As a result, ZIF-8 particles are distributed in PEO matrix continuously, leading to a low-resistance transport pathway for gas molecules in MMM, which is proved by the cross-sectional SEM images. Furthermore, the higher Tg of ZIF-8@PAN-x/PEO MMM by DSC also indicates the good interfacial compatibility between ZIF-8 and PEO. Compared with pure PEO membrane, all the ZIF-8@PAN-x/PEO MMMs present both enhanced CO 2 permeability and CO 2 /N 2 selectivity. The enhanced CO 2 permeability is attributed to the continuous ZIF-8 transport pathway, and the improved selectivity is ascribed to the size screening from nanofibers overlapping and stacking and the tortuous transport pathway. Importantly, compared with ZIF-8/PEO MMM, in which ZIF-8 particles are randomly dispersed into PEO matrix, the ZIF-8@PAN-4/PEO MMM with the same ZIF-8 loading of about 16.6 wt% presents enhanced CO 2 permeability and CO 2 /N 2 selectivity, which are increased by 52.4% and 44.3%, respectively. This is due to the continuous ZIF-8 transport pathway and good interfacial compatibility, which is also confirmed by the result of gas diffusivity and solubility coefficients. Together with the outstanding mechanical strength and stability, the proposed MMM with continuous ZIF-8 transport pathway paves a new way to improve CO 2 permeability.
研究领域:
材料科学
·
环境工程
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DOI
高影响因子
ANALYST
·
2019
·Vol. 144
·期 8
·2523-2530
·
IF 4.019
Xi-Jin Wu,Fan Kong,Chun-Qin Zhao,Shou-Nian Ding
Ratiometric fluorescent nanosensors were developed to detect mercury ions (Hg2+) using enhanced dual emissions from glutathione stabilized gold nanoclusters/indium-based metal–organic frameworks modified with cysteine (AuNCs/MIL-68(In)-NH2/Cys). The nanosensors exhibited bright pink fluorescence with AuNCs evenly distributed on MIL-68(In)-NH2. Under 370 nm excitation, the obtained sensor presented double fluorescence emission around 438 nm and 668 nm, which was attributed to MIL-68(In)-NH2 and GSH-AuNCs, respectively. The fluorescence emission was remarkably enhanced after modification with Cys. In the presence of Hg2+, the red fluorescence peak at 668 nm was quenched, while the blue fluorescence peak at 438 nm was slightly altered. The prepared AuNCs/MIL-68(In)-NH2/Cys nanosensors exhibited two linear ranges for the detection of Hg2+, namely from 20 pM to 0.2 μM and 0.2 μM to 60 μM, with a detection limit of 6.7 pM. They also presented high selectivity towards other ions and good performance in real water samples. Moreover, a radial star-shaped microfluidic paper-based analytical device (μPAD), as a straightforward and convenient platform, was successfully fabricated for the visual detection of Hg2+ with a wide detection range from 5 nM to 50 μM.
研究领域:
分析化学
·
环境科学
·
纳米技术
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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）