JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Mohan Huang,Kun Zhao,Shuangyan Liu,Ang Bian,Lu Jiang,Dawei He,Jiaqi He,Yongsheng Wang
The design and development of microwave-absorbing materials with excellent performance hold significant importance in both civil and military fields. The combination of magnetic loss materials and dielectric loss materials can achieve complementary performance effects and regulate impedance matching. In this paper, spindle-like α-Fe 2 O 3 was synthesized using MIL-88A as a template, which was then composited with Ti 3 C 2 T x phase possessing excellent electrical conductivity to obtain Fe 2 O 3 /Ti 3 C 2 T x composites. Ti 3 C 2 T x can provide good conductance loss and dipole polarization relaxation, while the incorporation of Fe 2 O 3 between the layers of Ti 3 C 2 T x not only triggers the interfacial polarization effect but also increases layer spacing, thereby enhancing multiple reflection effects. Furthermore, the magnetic-dielectric synergies further optimize the impedance matching. Through the combined action of multiple mechanisms, the Fe 2 O 3 /Ti 3 C 2 T x composites (with a mass ratio of 1:3 for Fe 2 O 3 and Ti 3 C 2 T x ) exhibit a minimum reflection loss of −34 dB and an effective absorption bandwidth of 1.53 GHz at a thickness of 3 mm, as well as an effective absorption bandwidth of 2.805 GHz at a thickness of 1.5 mm. This paper presents a reference strategy for constructing highly efficient microwave absorbers derived from Metal-organic frameworks (MOFs) and MXene based on their outstanding properties.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2018
·Vol. 8
·期 6
·250
·
IF 2.144
Xue-Qing Zhan,Xiao-Yan Yu,Fang-Chang Tsai,Ning Ma,Huan-Li Liu,Yu Han,Lei Xie,Tao Jiang,Dean Shi,Yan Xiong
Owing to their high surface area and porosity, metal-organic frameworks (MOFs) have been gradually employed for a myriad of applications ranging from sensing, pollutant adsorption, and drug delivery to environmental remediation and catalysis. Magnetic nanoparticles-metal-organic frameworks (MMOFs) hybrid materials can facilitate facile removal of MOFs from solutions. In this report, we report the synthesis of Fe3O4@UiO-66 by encapsulation and simulated the drug loading and release by studying the adsorption and release of AO7. Thus, we loaded these MMOFs with AO7 and found that they were able to trigger and control its release by simply applying an external magnetic field. The magnetic field heats the magnets in the MOF, which causes the load to burst from the framework.Keywords:magnetic MOFs;triggered release;targeted delivery;AO7
研究领域:
环境科学
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材料科学
·
药物递送
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Congyi Zhao,Yaxu Zhao,Wei Guo,Xiong Lu,Faming Gao
Multifunctional nanocomposites derived from metallic-organic frameworks @ metallic-organic frameworks (MOFs@MOFs) based on nanoarchitectonics may provide an innovative approach for the design of promising biosensors. A novel electrochemical biosensor based on tribulus-shaped ZrO 2 @Fe 2 O 3 -C nanocomposites for ultra-sensitive determination of organophosphorus pesticides (OPs) was prepared the pyrolysis of UiO-66@MIL-88B. ZrO 2 from the inner UiO-66 displayed an ultrahigh adsorption capability for OPs, and the interface electronic interaction of ZrO 2 @Fe 2 O 3 made Fe 2 O 3 positive, which can fix and enrich acetylcholinesterase (AChE) in the outer layer, since AChE was a negatively-charged enzyme. The dual enrichment property and synergistic effect of ZrO 2 @Fe 2 O 3 -C were responsible for enhanced detection performances toward OPs, including a wide linear range (3.07 × 10 −14 M−3.07 × 10 −8 M) and a low limit of detection (3.9 × 10 −15 M) (S/N = 3). The emergence of the multifunctional nanocomposites, through calcining MOFs@MOFs, opens a new chapter for the construction of biosensors for OPs determination.
研究领域:
分析化学
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环境监测
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纳米材料
·
生物传感器
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 41
·20100-20109
·
IF 9.931
Xia Shi,Aiping Wu,Haijing Yan,Lin Zhang,Chungui Tian,Lei Wang,Honggang Fu
The rational combination of early-transition metal nitrides (ETMNs) with late-transition metals (LTMs) is a promising method for the design of highly efficient catalysts. Herein, we report the design of Co–Mo2N tubes based on a “MOFs plus MOFs” strategy for efficient electrocatalytic water splitting in 1 M KOH. The 1-D Mo-MOFs (Mo source) were prepared in large quantities by the reaction of imidazole with MoO3. ZIF-67 (Zeolitic Imidazolate Framework-67) (Co source) was then grown on the 1-D Mo-MOFs (Mo-based metal–organic frameworks) to obtain ZIF-67/Mo-MOFs by a solution-phase assembly method. The effective combination is due to the similarity of the ligands in the two MOFs. After nitriding, the ZIF-67 was converted into Co metal, and Mo-MOFs were converted into hollow Mo2N, thus giving a hollow Co–Mo2N hybrid with a Co outer layer on the Mo2N inner core. The ratio of Co and Mo in Co–Mo2N can be easily tuned to give optimized catalysts. The tests indicated that the combination of Co and Mo2N can significantly boost the HER performance of materials. At the current density of 10 mA cm−2, the overpotential (η10) on Co–Mo2N was only 76 mV, which is much lower than 296 mV for Mo2N derived from Mo-MOFs and 180 mV for Co–carbon from ZIF-67. The hybrid has also shown improved OER activity in comparison with Mo2N and Co; therefore, the Co–Mo2N can be used as both anode and cathode for an overall water-splitting cell with η10 of 1.576 V. The improved HER activity can be ascribed to the intimate contact between Co and Mo2N for optimized adsorption on reagents, the tube-like structure for easy mass transfer and the good conductivity of Mo2N, which is favourable for transmitting charge.
研究领域:
材料科学
·
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 26
·9076-9087
·
IF 4.39
Yu Qiao,Na Lv,Dong Li,Hongji Li,Xiangxin Xue,Wei Jiang,Zhanlin Xu,Guangbo Che
Metastable Cu2O is an attractive material for the architectural design of integrated nanomaterials. In this context, Cu2O was used as the sacrificial agent to form the core–shell structure of Cu2O@HKUST-1 by in situ growth technology. The MOFs with BOPs adsorption property were gathered together by a Cu2O etching method, and the hollow structure of the HKUST-1 shell material with fast BOP adsorption was successfully constructed. The adsorption experiments showed that the HKUST-1 shell has a good adsorption effect on nitrobenzene pollutants in wastewater. The investigation of various factors affecting the adsorption, thermodynamic and kinetic equations was carried out. The adsorption equilibrium was reached within 30 min, and the maximum adsorption capacity was 94.67 mg g−1 at 298 K. The adsorption capacity of nitrobenzene by the HKUST-1 shell is in good agreement with the Freundlich model and the second-order kinetic model. The possible mechanism of adsorption of nitrobenzene by the HKUST-1 shell was discussed. The experimental results suggested that Cu-BTC materials have potential applications for wastewater treatment involving benzene pollutants.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Fangbing Wang,Jing Ren,Qiwen Peng,Hongyi Sun,Qiankun Zeng,Yongheng Zhang,Guoyue Shi,Min Zhang
Plasma separation, rich in biomarkers crucial for diagnosis, is conventionally achieved via high-speed centrifugation, a method hindered by its blood usage, lengthy processes, and complex operations, which delays detection. We introduced a novel real-time blood sensing method based on a Janus membrane and enzymes @MOFs. Asymmetric driving of the janus membrane can realize spontaneous separation of plasma and prevent hemolysis during direct separation. Glucose oxidase (GOx), uric acid oxidase (UOx) and horseradish peroxidase (HRP) were encapsulated in a hydrophilic organometallic framework (MOFs) to construct an enzyme cascade nanoreactor. Embedding enzyme in hydrophilic MOFs not only retains the natural conformation of free enzyme but also improves the brittleness of enzyme, endows MOFs with new biological functions, and expands its sensing application. Using 3,3′,5,5′-tetramethylbenzidine (TMB) as a chromogen and a custom app for color interpretation, we achieved real-time visualization of glucose (Glu) and uric acid (UA) at a 50 μM limit. The system accurately analyzed serum samples, matching commercial kits and showing promise for portable, personalized diagnostics.
研究领域:
生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 46
·16696-16703
·
IF 4.099
Lifei Xu,Yan Xu,Xianliang Li,Zhuopeng Wang,Ting Sun,Xia Zhang
The rational design strategy to construct lanthanide ion functionalized metal organic frameworks (MOFs) has attracted tremendous attention as they are promising candidates for developing novel luminescence materials and optical sensors owing to their intense, long-lived and tunable luminescence performances. In this work, a series of Eu3+/Tb3+ singly doped or codoped bismuth-based MOFs were prepared under in situ facile solvothermal conditions using BiOBr nanoplates as bismuth resources. A red-green-blue-based trichromatic white-light emission can be finely achieved by modulating the doping ratio of Eu3+/Tb3+ in the blue-emitting Bi-MOF host material and such photoluminescence tuning can also be realized by controlling the excitation wavelength. In addition, the Eu3+/Tb3+ singly incorporated Bi-MOF can serve as a multifunctional fluorescent probe for sensing Fe3+ and Cr2O72− ions in aqueous solution, as well as small organic pollutants of acetone molecules, and their sensing mechanisms have also been analyzed. These lanthanide ion functionalized Bi-MOF materials exhibit great potential in exploring white-light emitting devices and construction of supersensitive multifunctional sensors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yong Wang,Xuanyu Zhao,Shaoxiong Han,Yongzhen Wang
The development of efficient technology for natural gas separation in industrial processes has become imperative. In this regard, the exploration of novel and effective adsorbents has gained significant attention. One promising approach is the metal regulation of metal–organic frameworks (MOFs), particularly heterometallic MOFs, which offer greater potential for gas separation due to their diverse composition. This study presents the synthesis of a series of iron- and vanadium-based heterometallic MOFs (MIL-126), featuring interpenetrated structures, and investigates their adsorption performance for methane (CH4), ethane (C2H6), and propane (C3H8). Experimental results reveal that the choice of metal combinations within the MOF framework significantly influences the adsorption performance of MIL-126. Notably, heterometallic MIL-126(Fe/Ni) exhibits a stronger binding affinity for C3H8, with an impressive uptake of 177 cm3/g. The C3H8/CH4 ideal adsorbed solution theory selectivity of MIL-126(Fe/Ni) surpasses that of MIL-126(Fe) by a factor of 7, reaching a value of 853, second only to the highest reported value. Furthermore, MIL-126(Fe/Ni) exhibits remarkable potential for the recovery of pure CH4 from the equimolar C3H8/CH4 mixture, with the amount of pure CH4 approaching the maximum reported value for MOFs. Insights from isosteric heat at zero loading and Henry’s coefficients indicate that the transformation of metal types leads to a change in the interaction energy between C3H8 and the framework. Furthermore, breakthrough experiments validate the effective separation capability of MIL-126(Fe/Ni) for CH4/C2H6/C3H8 mixtures. These findings underscore the remarkable potential of heterometallic MOFs in constructing a wide range of new MOFs with tailorable properties, thereby enhancing their gas separation performance.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Gongle Shen,Linling Zhong,Yuanhang Bi,Yifan Liu,Jiangqi Zhao,Xin Wen,Yifei Zhu,Lei Feng,Li Geng,Fan Yu,Changjun Hou,Xianfeng Wang
Considering the vital role of sulfide ions (S 2- ) in food safety, environmental pollution and public health, accurate and efficient detection of S 2- is of great importance. In this study, Er-MOFs with the structure of four-pointed star was successfully designed and synthesized using Er(III) as the metal center and TCPP as the ligand. It is found that host-guest effects occur between Er-MOFs and S 2- , blocking the ligand-to-metal charge transfer (LMCT) effect and O-H vibration. This progress leads to the fluorescence signal-on of Er-MOFs and the production of a brown color. In view of this, a Er-MOFs-based sensor was constructed for rapid and on-site monitoring of S 2- in water, which shows the triple-signal outputs including fluorescence, absorbance and smartphone-based RGB analysis with high sensitivity and selectivity. More importantly, the successful measurement of S 2- in real water samples with satisfactory recoveries from 96.26 % to 104.03 %, demonstrating the practicality and effectiveness of Er-MOFs for S 2- recognition. Overall, this assay exhibits the promising applications for S 2- measurement in the fields of environmental pollution and food safety.
研究领域:
材料科学
·
环境科学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
BIOELECTROCHEMISTRY
·
2022
·
IF 5.76
Hao Fan,Ying Wu,Tongfu Huang,Nian Hong,Hanfeng Cui,Guobing Wei,Fusheng Liao,Jing Zhang
As an artificial nanomachine, a DNA walker demonstrates the potential for biosensing. In this study, a highly integrated, biostable, and autonomous electrochemical DNA walker sensor was rationally designed by a simple assembly of a Mn 2+ -dependent DNAzyme-powered DNA walker with nanoscale Mn 2+ @MOFs containing free carboxylic acid groups UiO-66(Zr)-(COOH) 2 . In this study, the release of Mn 2+ from Mn 2+ @MOFs was exploited to drive the autonomous and progressive operation of the DNA walker, and the DNAzyme-driven DNA walker was constructed by the co-modification of walking strands and track strands onto the gold electrode (GE) surface. The walking strand was a single-stranded DNA containing a DNAzyme sequence, which was pre-silenced by the locking strand. The track strand was a specially designed DNA sequence that the target can hybridize with the locking strand; hence, the walking strand is unlocked, and the liberated DNAzyme catalyzes the cleavage of track strands to drive the DNA walker operation, shifting tetraferrocene away from the electrode and producing a significant signal change. A detection limit of 38 fM was obtained with our new system, exhibiting a wide linear range from 1.5625 × 10 −9 M to 1 × 10 −13 M. The proposed approach provided a novel means for constructing an highly integrated, automated, and DNAzyme-driven DNA walker for bioanalysis.
研究领域:
生物传感
·
纳米技术
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2023
·Vol. 28
·期 12
·4789
·
IF 4.6
Xin Yang,Tie Shu,Haoyu Huang,Hongquan Yi,Yanchi Zhang,Wei Xiao,Liang Li,Yuxin Zhang,Minghao Ma,Xingyuan Liu,Kexin Yao
Aqueous zinc ion batteries (AZIBs) are promising electrochemical energy storage devices due to their high theoretical specific capacity, low cost, and environmental friendliness. However, uncontrolled dendrite growth poses a serious threat to the reversibility of Zn plating/stripping, which impacts the stability of batteries. Therefore, controlling the disordered dendrite growth remains a considerable challenge in the development of AZIBs. Herein, a ZIF-8-derived ZnO/C/N composite (ZOCC) interface layer was constructed on the surface of the Zn anode. The homogeneous distribution of zincophilic ZnO and the N element in the ZOCC facilitates directional Zn deposition on the (002) crystal plane. Moreover, the conductive skeleton with a microporous structure accelerates Zn2+transport kinetics, resulting in a reduction in polarization. As a result, the stability and electrochemical properties of AZIBs are improved. Specifically, the ZOCC@Zn symmetric cell sustains over 1150 h at 0.5 mA cm−2with 0.25 mA h cm−2, while the ZOCC@Zn half-cell achieves an outstanding Coulombic efficiency of 99.79% over 2000 cycles. This work provides a simple and effective strategy for improving the lifespan of AZIBs.Keywords:aqueous zinc ion batteries;MOFs;anode;dendrite growth
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Xin Zhang,Xin Xie,Lingjun Zhang,Kaibin Yao,Yingzhou Huang
Optoplasmonic hybrid structures composed of photonic and plasmonic elements with excellent optical properties are of great significance for the development of surface-enhanced Raman spectroscopy (SERS) substrates. In this work, the optoplasmonic hybrid structure is composed of SiO 2 microsphere and two-dimensional (2D) plasmonic- metal organic frameworks (MOF) film. Among them, the 2D plasmonic-MOF film is prepared from silver nanoparticles encapsulated by zeolitic imidazole acid framework (AgNP@ZIF-8) by self-assembly method. This optoplasmonic hybrid structure with gas adsorption properties could be used as a SERS substrate for 4-Mercaptophenol (4-MP) gas detection. Experimental data show that this substrate is dependent on the thickness of the ZIF shell and the size of the SiO 2 microspheres . In addition, it is confirmed by the electromagnetic field simulation of finite-difference time-domain method (FDTD). The optoplasmonic hybrid microstructures exhibit good uniformity for detection of 4-MP gas molecules. This work not only broadens the understanding of our optoplasmonic hybrid structure, but also has broad application prospects in SERS and gas sensing related fields.
研究领域:
材料科学
·
光学
·
分析化学
✓ 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）