CHEMICAL ENGINEERING SCIENCE
·
2022
·
IF 4.889
Guanghui Zhang,Yan Liu,Chao Chen,Lulu Long,Jinsong He,Dong Tian,Ling Luo,Gang Yang,Xiaohong Zhang,Yanzong Zhang
Superwettability materials with a single function cannot meet the needs of different oil-bearing wastewater separations. This study proposed a preparation method for the swappable superwettability on cotton fabrics. The superhydrophobic fabric surface that was wetted with ethanol transformed from being superhydrophobic/superoleophilic to being superhydrophilic/underwater superoleophobic, and returned to superhydrophobicity after drying. Regardless of whether it is the oil removal process or the water removal process, the flux of the fabric was above 15,300 L·m −2 h −1 , and the separation efficiency was over 98.6%. Although the continuous separation was conducted 50 times, the flux and separation efficiency did not change significantly. The prepared material could exhibit superhydrophobicity after being immersed in solutions of different pH and actual seawater for some time, even after 50 times of sand impact experiments, indicating excellent mechanical durability and chemical stability. Thus, the preparation strategy of the swappable superwettability materials can develop oil–water separation technology.
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
Journal of Computational and Theoretical Nanoscience
·
2017
·Vol. 14
·期 7
·3203-3208
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IF 0
Tang Zhuxing,Lu Guangming,Ai Meimei
With hydrothermal method synthesized Fe3O4@PDA@MOF-199 magnetic nano-materials and the materials were characterized through scanning electron microscopy, energy spectrum diagram, fourier infrared and vibrating sample magnetometer. Metal organic framework materials
has a large surface area and a good adsorption for heavy metal ions, and the magnetic nanomaterial was separated easily via a magnet from a solution. The optimal condition: material consumption of 5 mg, shock time for 1 h, pH = 5 and under the condition saturated adsorption amount of Fe3O4@PDA@MOF-199
magnetic nanomaterials to Pb2+ was 539 mg g−1. And using 0.1 mol L−1 EDTA solution as eluent to desorb the saturated Fe3O4@PDA@MOF-199 magnetic nanomaterials, the elution rate can reach 89.44%. In this paper, Fe3O4@PDA@MOF-199
magnetic nanomaterials were used to absord Pb2+ in actual sample.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yixi Xu,Yufei Huang,Jia Zhao,Xuhui Han,Chunpeng Chai,Huiling Ma
Two-dimensional nanomaterial MXene Ti 3 C 2 T x with excellent electrical conductivity has received extensive attention in the electromagnetic wave (EMW) absorption field. However, the excessively high permittivity of Ti 3 C 2 T x is not conducive to impedance matching and the absorption of EMW. Considering the low permittivity and mesoporous structure of MOF , in this work, Co/La-MOF were in situ growth on the surfaces of Ti 3 C 2 T x by a facile co-solvothermal method. The obtained Co/La-MOF anchored on Ti 3 C 2 T x (Co/La-MOF/Ti 3 C 2 T x ) composite exhibits low density with excellent EMW absorption performance. Co/La-MOF/Ti 3 C 2 T x -2 (Co 2+ /La 3+ mass ratio of 16:3) shows the minimum reflection loss of − 44.15 dB at 4.00 GHz with the effective absorption bandwidth of 3.67 GHz in the frequency range of 14.03–17.70 GHz under 1.3 mm. In addition, the electromagnetic absorption mechanism of Co/La-MOF/Ti 3 C 2 T x was also investigated. It provides an effective strategy for the preparation of a novel absorber with high EMW absorbing performance.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·Vol. 26
·期 44
·6314-6321
·
IF 2.6
Zhen Liu,Danli Song,Wen-Bo Pei,Liquan Wu,Hong Xie,Gaigai Cai,Jiefei Yang,Bing Zheng,Wei-Wei Xiong
Metal–organic frameworks (MOFs), self-assembled by metal ions and organic ligands, have been utilized as active layers in resistive random-access memory (RRAM) devices due to their tunable composition and structure advantages, high porosity, and diverse interactions between guest molecules and host frameworks. As one kind of special MOF, MOF nanosheets not only inherit the benefits of MOFs but also present unique two-dimensional nanoscale thicknesses. Their special properties make them beneficial for fabricating MOF films. Thus, they could be promising materials for RRAM devices. Herein, we synthesized two porphyrin MOF nanosheets and then fabricated MOF films by spin-coating. After that, we used the films for resistive switching (RS) layers in memory devices. The as-fabricated RRAM devices exhibit write-once-read-many-times memory characteristics and good nonvolatile stability. Furthermore, due to the unique luminescence of the porphyrin linker, we investigated the light-induced resistive switching characteristics. The result shows that these porphyrin-based MOF nanosheet films exhibited ternary memory properties. This RS modulation is likely related to the photoinduced electrons and holes forming along channels consisting of porphyrin molecules. This MOF-based light-mediated memory device can be a candidate for achieving environment-responsive devices and has applications in information storage devices.
研究领域:
材料科学
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电子工程
·
光学
✓ 已验证
DOI
高影响因子
Soft Matter
·
2024
·
IF 2.9
Yu Cao,Mingji Wu,Yu Chen,Xiaomiao Feng
Flexible two-dimensional nickel-cobalt metal-organic frameworks/graphene oxide/carbon nanotubes hybrid films (2D NiCo-MOF/GO/CNTs) have been designed and prepared as high-performance supercapacitor electrode materials via vacuum filtration. The 2D NiCo-MOF nanosheets serve as the main source of capacitance for the hybrid films, while CNTs function as both the conductive network, enhancing the electrical conductivity of the MOFs, and the binder, linking the 2D NiCo-MOF nanosheets and GO. When the mass ratio of 2D NiCo-MOF, GO, and CNTs is 2:1:0.5, the hybrid film exhibits a high specific capacitance of 40.3 F g-1 at 0.4 A g-1. Furthermore, the film electrode demonstrates outstanding cycling stability, with a capacitance retention of 96.3% after 2000 cycles at 1 A g-1. Notably, the CV curves of the asymmetric supercapacitor (ASC) show almost no change after multiple bending, indicating excellent flexibility. Additionally, two devices connected in series can light an LED, demonstrating significant potential for practical applications.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Zhehang Tian,Xieyang Zhang,Yuting Zhang,Zimeng Wu,Guanqun Luan,Luqian Bao,Yixin Ji,Mengyao Cui,Chunhua Li
The misuse of tetracyclines in livestock production poses significant health risks. Thus, establishing convenient detection methods to replace complex laboratory tests for food safety is crucial. In this study, a heterostructure Zn-BTC/IRMOF-3 (denoted as ZBI) asynchronous response fluorescence sensor was developed for the qualitative and quantitative detection of tetracyclines in foods. The ZBI solution exhibited blue fluorescence under UV excitation; upon the introduction of tetracyclines, ZBI selectively recognized the tetracycline molecules through electron transfer, π-π stacking, and chelation, resulting in blue fluorescence quenching and green fluorescence enhancement. The ZBI sensor for tetracycline detection achieved recovery rates ranging from 93.91 to 111.91% in food samples, with a detection limit of as low as 0.086 μmol/L. Lastly, a portable sensing device using support vector classifier was constructed for detecting tetracyclines in real-life scenarios. Our findings introduce a new approach for fabricating fluorescence sensors and offer a novel method for detecting tetracyclines.
研究领域:
材料科学
·
分析化学
·
食品安全
·
机器学习
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Dongping Huang,Peng Yong,Shuifa Shen
The sea urchin-like In 2 O 3 material was successfully synthesized through a simple hydrothermal method . Furthermore, the material underwent surface decoration without adding extra indium ions , resulting in the formation of a thin MIL-68(In) layer on the surface of In 2 O 3 . The obtained In 2 O 3 @MIL-68(In) retains the sea urchin-like morphology while acquiring an additional porous structure. Compared to pure In 2 O 3 , the composite exhibits a significant increase in specific surface area, leading to enhanced gas sensitivity. Notably, it demonstrates exceptional sensitivity towards formaldehyde gas, with a response of 18 at 100 ppm at 300 °C, up to six times more than pure In 2 O 3 . Moreover, In 2 O 3 @MIL-68(In) showcases remarkable selectivity and stability. These findings suggest that surface-modified MOF can enhance gas-sensitive properties.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Chunliang Zhao,Jinghui Wu,Yidi Gao,Jialin Zhou,Leilei Zhang,Chi Wang,Yang Huo,Xianze Wang,Mingxin Huo
The rapid increase in PLA product consumption has led to significant environmental challenges. To address this issue, this study focuses on developing efficient catalysts to accelerate PLA alcoholysis, aiming to enhance degradation efficiency. A novel composite catalyst, SiWMn Ⅲ @MIL-125(Ti), was synthesized by encapsulating Keggin-type polyoxometalate (POM) in the octahedral cavities of MOF(MIL-125(Ti)). The compound was comprehensively characterized, while density functional theory (DFT) calculations further confirmed the potential localization of POM within the MOF. The catalyst exhibited excellent efficiency in the alcoholysis of polylactic acid (PLA) using ethylene glycol (EG) under optimum conditions (1 wt% catalyst, 160 °C, 30 min, EG/PLA molar ratio = 4:1, 18 % POM loading), achieving high PLA conversion. The liquid products were systematically analyzed, proposing their oligomeric structures. Notably, this heterogeneous catalyst could be easily retained by filtration and could be reused for more than 10 cycles without significant activity loss. Combined with DFT simulations, a reasonable catalytic mechanism was elucidated, highlighting the synergistic role of POM@MOF in facilitating alcoholysis of PLA. This work not only provides insights into the design of efficient MOF-based catalysts for polymer degradation but also suggests the potential applicability of POM@MOF systems in other depolymerization processes.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·Vol. 30
·期 3
·1615-1625
·
IF 2.4
Dong Jinxiu,Cui Shichuang,Wang Fei,Wei Wei,Yin Ziluo,Zhang Yuqing,Zhu Quanyao
Electrochromism (EC) is a color control technique for providing visual information, in which vanadium pentoxide (V 2 O 5 ) is a promising material for electrochromic applications due to its excellent ionic intercalation/deintercalation properties and cathodic/anodic color-changing properties. However, its poor cycling stability and color change response rate limit its practical application. Metal–organic frameworks (MOFs) combine the rigidity and flexibility of inorganic–organic materials and can meet the requirements of EC materials such as cycle stability, electrical conductivity, and stress-interference resistance. We report here a strategy to modify V 2 O 5 with Cu-MOF. Cu-doped V 2 O 5 and carbon skeleton (Cu 2 V 2 O 7 @C) composites were prepared for electrochromism. In this scheme, Cu doping can facilitate lithium ion migration by broadening and stabilizing the structure of V 2 O 5 , and the distribution of the carbon skeleton can broaden the contact of the active material with the electrolyte and improve the electron conduction. Combining these merits, it exhibits excellent long-term cycle stability (the capacity retention rate reaches 91.78% after 2000 cycles), the light transmission modulation is greatly improved compared with V 2 O 5 (Δ T = 69%, doubled), and the response time is reduced by 30.43%. This study provides a new perspective for improving the light modulation ability and long-term use stability of vanadium oxide EC materials and promotes the development of MOF materials in the field of electrochromism.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 22
·3989-3994
·
IF 3.545
Anqi Li,Xiaofan Ma,Jie Ma,Qingyi Yuan,Jun Zhang,Xiaopeng Xuan
Herein we reported a simple and economical method for fabricating a portable separation device based on exfoliated 2D-metal–organic framework (2D-MOF) nanosheets. This device is composed of a layered Cu-MOF as a filter and a syringe filter as the holder. Benefiting from the structural characteristic of the 2D-MOF nanosheets, the separation experiment reveals that this strategy can exhibit high efficiency and selectivity for dyes with different sizes. This device can be used disposably for a special purpose due to the low cost, simple manufacturing process in an emergency.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Fang Zhang,Lei Wang,Lutao Yang,Yong Dai,Jun Zhang,Lei He,Juqing Cui,Jian Shen,Zhe Wang
Immobilized microbial technology is a simple, cost-effective, and efficient technique to minimize the difficulty and energy consumption of heavy oil extraction, as well as the COD of oilfield wastewater. In this work, PC- g -Mag(Fe-MOF) was prepared to immobilize microorganisms obtained by grafting lecithin after magnetization using Fe-MOF. The orthogonal tests showed that the optimum temperature for immobilized microorganisms was 38 °C, the optimum pH was 7, the optimum inoculum was 7 % and the desired mineralization level was <20,000 ppm. The viscosity of free and immobilized microorganisms decreased by 61.5 % and 76 %. The recovery efficiency of the carrier with two species of bacteria after 5 cycles of experiments was 87.5 % and 73.2 %, respectively. The removal rate of COD in the 5th time was 69.3 %, the viscosity reduction rate of heavy oil was 61.6 %. The recovery efficiency of heavy oil was increased by 25.09 %. Fe-MOF acts as a biocarrier to immobilize bacteria and enhance the metabolic activity of their microbial communities and improves COD removal from oilfield wastewater and viscosity reduction in heavy oil.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2023
·Vol. 148
·期 8
·1838-1847
·
IF 4.2
Zhidong Zhao,Yuan He,Xingrui Qi,Nian Li,Zijian He,Yufang Chen,Tao Jin
Electrochemical determination of synthetic opioids such as fentanyl is meaningful but still challenging no matter from a social or academic perspective. Herein, we report a series of novel electrocatalysts based on Fe-containing metal–organic frameworks and multi-walled carbon nanotubes (Fe-MOF/MWCNTs). The obtained Fe-MOF/MWCNT electrode materials all show ultrasensitivity on fentanyl determination. In particular, MOF-235/MWCNTs even exhibit an ultra-low limit of detection (LOD) of 0.03 μM with a wide linear range from 0.1 to 50 μM. Besides, this series of Fe-MOF/MWCNTs also displays excellent repeatability, selectivity, and stability. Moreover, they show good performance in real sample detection and achieve good recovery of 95.47%–102.41% and 96.62%–103.15% in blood and urine samples, respectively. This high performance in fentanyl determination is mainly contributed by the Fenton-like process and the adsorption function of the Fe-MOF. Therefore, these novel Fe-MOF/MWCNTs are promising electrocatalysts for point-of-care device fabrication and also have potential applications in fentanyl rapid test technology.
研究领域:
分析化学
·
材料科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）