SENSORS AND ACTUATORS B-CHEMICAL
·
2024
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IF 8
Weining Liu,Hairong Li,Dandan Huang,Xi Tan,Mingyang Zhao,Qionglin Cheng,Ming Yi,Qi Ding,Yaqian Ren,Guohan Liu
Triethylamine (TEA) poses severe safety hazards to industrial production and human health. To accurately detect TEA concentrations and rapidly warn of leakage, a simple reflux condensation method was deployed to successfully incorporate Zn 2+ in situ into Mo-MOFs precursor in a green, safe, and time-efficient synthesis condition. Subsequently, through calcination, MoO 3 /ZnMoO 4 -X (MMZ-X) were prepared, which exhibited an increased number of defects and enriched porosity, facilitating the access and interaction of TEA with adsorption sites. Simultaneously, rationally built in situ MoO 3 /ZnMoO 4 heterostructures accelerated carrier migration and induced a drastic resistive change. MMZ-2 demonstrated outstanding TEA sensing performance, exhibiting extremely high sensitivity ( R = 572.3, 100 ppm), along with superior selectivity, repeatability and stability, rapid response and recovery times, and a low detection limit. Moreover, the key intrinsic parameters of the heterostructure on the atomic scale were determined by density functional theory (DFT) calculations, providing a detailed elucidation of the sensing enhancement mechanism of the MoO 3 /ZnMoO 4 heterostructure. The simple and efficient synthesis method and the related mechanistic analysis pave a new path for designing high-performance TEA gas sensors with practical applications.
研究领域:
材料科学
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化学传感器
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xiutong Yan,Biyun Lin,Chuangyu Ning,Xin Wang,Zhihong Chen
CdS is a promising candidate for visible-light-driven photocatalytic H 2 -evolution, but its practical application is still limited by self-photo-corrosion and noble co-catalysts needing. Herein, CdS/NiCo-MOFs (CM) heterojunction was synthesized by an in-situ hydrothermal method , where NiCo-MOFs (BMOFs) acted as platform to inhibit the aggregation of CdS nanoparticles . Furthermore, BMOFs provided dual-reaction sites to improve the photocatalytic H 2 -evolution speed and suppress the photo-corrosion of CdS by taking its Ni-linker as catalytic active sites for water splitting and Co-linker as hole trapping sites to suppress the self-oxidation between S 2− and holes. Therefore, the optimal CM-20% exhibited a remarkable photocatalytic H 2 -evolution rate of 1.810 mmol g −1 h −1 under sunlight irradiation, which is 4.55 times higher than that of CdS. Moreover, CM-20% maintained this high photocatalytic H 2 -evolution rate for 100 h reaction, which for CdS is just 50 h. This research provides insight into designing high-efficiency and photo-stable sulfide-based photocatalyst systems for H 2 -evolution.
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
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2015
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IF 2.489
Ling Li,Ya Q. Wu,Ke K. Sun,Run Zhang,Lu Fan,Ke K. Liang,Le B. Mao
By exploring the layer-by-layer self-assembly method and the changes of content of graphene oxide (GO), controllable preparation of a new core–shell microsphere Fe 3 O 4 @MOFs/GO was achieved in this work. The prepared composite material was characterized by the XRD , FTIR, and TEM analysis. The application of Fe 3 O 4 @MOFs/GO as drug carrier for ibuprofen was studied. The results suggested that the properties of drug loading and release can be tuned by different layers and content of GO.
研究领域:
材料科学
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药学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Tian Zhao,Hexin Zhu,Wei Geng,Minmin Zou,Ming Dong,Jie Ying
Propionic acid could efficiently affect the formation of Cr-benzenedicarboxylate metal-organic frameworks (MOFs), giving rise to yielding products with various structures. Generally, nano-sized crystals of MIL-101(Cr) can be prepared with comparatively lower concentration of propionic acid (0.6 M), which possessed high porosity (S BET = 2720 m 2 /g). The hierarchically porous (HP) MIL-101(Cr) was obtained with medium concentration of propionic acid (1.2 M), and micro-rod like crystals of MIL-88B(Cr) was formed in high concentration of propionic acid (1.8 M). Compare to bulk MIL-101(Cr) and nano-sized MIL-101(Cr), HP-MIL-101(Cr) showed much higher uptake of methylene blue (119.1 mg/L) in aqueous. This approach can offer a facile and effective pathway to synthesize stable hierarchically porous Cr-benzenedicarboxylate MOF for the applications in pollutant treatment fields.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Xiao-Lan Zhao,Jia-Li Liu,Fa-Ting Xie,Tong Yang,Rong Hu,Yun-Hui Yang
In this paper, a simple, rapid, and low-cost colorimetric method was designed based on Co/Fe-MOFs-iodide composite for the quantitative detection of H 2 S. It is know that iodide can improve the catalytic activity of bimetallic porous material Co/Fe-MOFs via adsorption into the framework of MOFs. Herein, we demonstrate a novel strategy to enhance the peroxidase-like activity of MOFs. Compared to horseradish peroxidase (HRP), the kinetic measurement results show that Co/Fe-MOFs-iodide exhibits excellent affinity to substrates, promoting electron transfer. Due to the synergetic effect of Co/Fe-MOFs and iodide, and rapid electron transfer process, Co/Fe-MOFs-iodide demonstrates improved peroxidase-like activity. As a proof-of-concept application, a novel, highly sensitive H 2 S colorimetric method is established with a detection limit (LOD) of 0.33 nM. In the absence of iodide, LOD is approx. 200-fold higher than that of the amplified colorimetric assay. The proposed method can also accurately detect traces of H 2 S in serum samples.
研究领域:
生物化学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2023
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IF 5.7
Du Jinsong,Chen Guanping,Yuan Xinyi,Yuan Jiang,Li Li
Although the potential of metal-organic framework (MOF) nanoparticles as drug delivery systems (DDS) for cancer treatment has been established by numerous studies, their clinical applications are still limited due to relatively poor biocompatibility. We fabricated a multifunctional Cu-MOFs@Keratin DDS for loaded drug and chemodynamic therapy (CDT) against tumor cells. The Cu-MOFs core was prepared using a hydrothermal method, and then loaded with the anticancer drug DOX and wrapped in human hair keratin. The Cu-MOFs@Keratin was well characterized by transmission electron microscopy (TEM), fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), and X-ray photoelectron spectroscopy (XPS). Characterization and pharmacokinetic studies of Cu-MOFs@Keratin were performed in vitro and in vivo. The keratin shell reduced the cytotoxicity and potential leakage of Cu-MOFs to normal cells, and allowed the drug-loaded nanoparticles to accumulate in the tumor tissues through enhanced permeability and retention effect (EPR). The particles entered the tumor cells via endocytosis and disintegrated under the stimulation of intracellular environment, thereby releasing DOX in a controlled manner. In addition, the Cu-MOFs produced hydroxyl radicals (·OH) by consuming presence of high intracellular levels of glutathione (GSH) and H2O2, which decreased the viability of the tumor cells.
研究领域:
生物医学工程
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纳米医学
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癌症治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
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2024
·
IF 6.5
Cheng Liu,Huiling Chen,Qi Chen,Jinhong Bi,Jimmy C. Yu,Ling Wu
A series of Al 3+ -doped UiO-66(Ce) MOFs (U(Ce x Al 1−x )) was developed to reveal the roles of metal doping on active site formation and substrate activation in photocatalytic selective transformation of amines to imines. Al 3+ doping induced crystal structure distortion to form coordinately unsaturated metal (Al, Ce) sites as Lewis acid sites to chemisorb and activate benzylamine (BA). In situ FTIR revealed that the Al site with stronger acid strength facilitated BA activation. The activation degree of N–H bonds in BA was evaluated by changes of calculated force constant. The intermediate products were confirmed through time-dependent in situ FTIR. The Al 3+ -doped sample U(Ce 0.90 Al 0.10 ), the optimal catalyst, showed a significantly increased BA conversion (97.6 %) than that (47.5 %) of undoped sample, which was attributed to enough active sites and the optimal charge mobility. Finally, the present study proposes a synergistic photocatalytic mechanism associated with molecular activation to demonstrate selective oxidation pathways at the molecular level.
研究领域:
材料科学
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化学工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2021
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IF 3.383
Xiaodan Li,Xiaoqing Liu,Xinyu Hu,Rui He,Hongyu Liu
A fluorine-functionalized zirconium-based metal organic framework (F 4 -UiO-66) was successfully synthesized via the reflux method, and the F 4 -UiO-66/BT nanocomposites of F 4 -UiO-66 modified bismaleimide-triazine resin (BT resin) were prepared. The effects of F 4 -UiO-66 on the crosslinking structure and properties of BT resin were evaluated for the first time. The investigations showed that the active H in F 4 -UiO-66 effectively catalyzed the self-polymerization of cyanate ester and promoted the formation of more rigid triazine rings which increased the initial storage modulus of nanocomposites. But the steric hindrance effect of F 4 -UiO-66 reduced the crosslinking density, which increased the free volume of nanocomposites. So, the dielectric constants of the nanocomposites were significantly reduced with the increase of F 4 -UiO-66 for the reduction of molecular polarization due to triazine rings and C–F bonds, and the decrease of polarization density caused by the nanopores and free volume. In addition, F 4 -UiO-66 was evenly dispersed in BT resin. On the basis of maintaining the thermal stability, the toughness and hydrophobic properties of nanocomposites were also enhanced. This study provided a novel approach for low-dielectric materials with hydrophobic property through the synergy between the nanopores and the C–F bonds.
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
MOLECULES
·
2024
·Vol. 29
·期 18
·4477
·
IF 4.2
Fuhua Wei,Qin Zhang,Qinhui Ren,Hongliang Chen,Yutao Zhang,Zhao Liang
The Zn/Cr-MOFs/TiO2composites were synthesized using the solvothermal method. XRD, FTIR, and SEM techniques were utilized to characterize the Zn/Cr-MOFs/TiO2composites employed for simulating levofloxacin hydrochloride in wastewater. The impact of the mass of the Zn/Cr-MOFs/TiO2composite, concentration of levofloxacin hydrochloride, solution pH, and temperature on the adsorption performance was investigated. Experimental findings indicated that at pH 6, the maximum removal efficiency of levofloxacin hydrochloride by the Zn/Cr-MOFs/TiO2composite was achieved at 88.8%, with an adsorption capacity of 246.3 mg/g. To analyze the experimental data, both pseudo-first-order and pseudo-second-order kinetics models were applied, revealing that the pseudo-second-order model provided a better fit to the data. Additionally, Langmuir and Freundlich isotherm models were used to study equilibrium adsorption behavior and showed good agreement with both kinetic modeling and Langmuir isotherm analysis results. These observations suggest that monolayer adsorption predominates during the removal process of levofloxacin hydrochloride by Zn/Cr-MOFs/TiO2composites.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2022
·
IF 9.417
Xiao Yang,Ning Zhang,Gen Li,Mingzhe Zhang,Chunli Pang,Shenzhen Ren,Hailong An
Recently, the development of multifunctional nanoplatforms for synergistic therapy is highly attractive in cancer treatment. Herein, a cancer cell membrane-coated biomimetic nanoplatform (termed as mPAGT) was designed through a simple and versatile polyphenol-mediated coating strategy for a catalytic cascades-enhanced tumor targeted combination therapy. Porphyrin MOFs (PCN) were selected as a nano-photosensitizer and then an endogenous nitric oxide (NO) donor l -arginine ( l -Arg) was loaded into the framework to obtain PA nanoplatforms; Subsequently, glucose oxidase (GOx) was coated on the surface through the interactions between protein and polyphenol and the purified murine breast cancer cell membrane was further decorated to form the resulting nanoplatforms mPAGT NPs. The prepared nanoplatforms exhibited an excellent drug loading capability (9.59% for l -Arg and 33.75% for GOx) and homologous targeting ability. Meanwhile, the mPAGT NPs could initiated a cascade reaction included GOx catalyzed oxidation of glucose, nano-photosensitizer based 1 O 2 -producing, and ROS-mediated the release of NO, and induce an obvious apoptosis with the highest apoptotic ratio of 86.2%. Moreover, the in vivo experimental results further confirmed that our multifunctional nanoplatforms possessed negligible systemic toxicity and promising potential for the treatment of tumor through the catalytic cascades-enhanced synergistic therapy.
研究领域:
纳米技术
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癌症治疗
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材料科学
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生物化学
·
药学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2025
·
IF 5.7
Qiao Wang,Yimin Gong,Jianing Li,Xin Zeng,Dan Luo,Yun Ling,Yaming Zhou,Zhenxia Chen
Metal-organic frameworks (MOFs) are crystalline porous materials with tunable structures, where metal ions or clusters serves as magnetic centers and organic ligands offer spatial separation. These characteristics, combined with their diverse topologies, make MOFs promising candidates for contrast agents (CAs) in magnetic resonance imaging (MRI). Herein we synthesized four MOFs based on the same triangular Fe3O clusters with different topologies: MIL-101(Fe) (mtn net), MIL-100(Fe) (moo net), MIL-59(Fe) (pcu net), and MIL-88B(Fe) (acs net). To clarify the relationship between topologies and T2 relaxivities, the MOFs were tailored into uniform, nanoscale spherical morphologies. Notably, the value of T2 relaxivity for MIL-88B(Fe) with acs topology is nearly three times of that for MIL-101(Fe) with mtn topology at 7.0 T. By comparing with the magnetic properties of Fe3O molecular clusters and Ga-doped MIL-88B(Fe), our analysis demonstrated the significant advantage of MOFs with fixed arrays, adjustable component and diverse topologies in enhancing magnetic relaxation. Cellular MRI experiments further revealed that MIL-88B(Fe) could differentiate between M1 and M2 macrophages, highlighting its potential for monitoring tumor progression. These findings offer valuable insights into how MOF topology can be strategically utilized to enhance T2 relaxivities for MRI applications.
研究领域:
材料科学
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医学影像
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生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Siyu Zhou,Xiaoquan Feng,Junyong Zhu,Qiangqiang Song,Guang Yang,Yatao Zhang,Bart Van der Bruggen
Although membrane separations have evinced an enormous potential in the treatment of dye wastewater, the ubiquitous membrane fouling leads to a dramatic decline of separation efficacy and life span, impeding the progress of membrane-based applications. The copper-triazolate MOFs (CuTz-1) exhibit robust thermal and chemical stability with a unique feature of degrading organic molecules under the visible light, rendering them highly promising for construction of self-cleaning membrane. This study presents the utilization of photocatalytic MOFs (CuTz-1) for construction of the CuTz-1/graphene oxide (CuTz-1/GO) composite membranes via filtration-assisted assembly followed by chemical crosslinking. The presence of CuTz-1 among the GO nanosheets promotes an enhancement of the GO interlayer distance, thereby promoting a higher water flux without compromising the dye rejections. The best-performing CuTz-1/GO membranes exhibits the high water permeance of 40.2 L m −2 h −1 bar −1 and superior dye rejections (Congo red: 99.4%, direct red: 98.2%, methyl blue: 94.9%), low salt rejections (e.g., NaCl: 0.3% and Na 2 SO 4 : 19.6%), as well as long-term nanofiltration stability. Furthermore, after visible light irradiation, the treated membrane was nearly recovered to have the original separation efficacy due to effective photocatalytic removal of the attached dyes from the membrane surface. The CuTz-1/GO membrane also exhibits an ultra-high bacteriostasis rate of 100%, probably to be ascribed to the combined antimicrobial effect of CuTz-1 and GO. This work is expected to give a useful guideline for developing loose nanofiltration membranes with favorable photocatalytic and antimicrobial properties, offering an appropriate solution of using self-cleaning membranes for the treatment of dye wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
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