SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Lin Chen,Xi Chen,Fei Wang,Yu Tong,Kewei Zhang,Zhengbo Han,Mingzhe Zhang
Metal-organic frameworks (MOFs) are regarded as potential candidate materials with great application prospects in the field of gas sensing. In this study, MOF derivatives were anchored onto MXene sheets through self-assembly technology to prepare a heterojunction material ZnO/Ti 3 C 2 T x MXene with high specific surface area, achieving ultrafast dual gas sensing behavior for H 2 /NO 2 . At a low temperature of 80°C, the ZnO/ Ti 3 C 2 T x MXene heterojunction sensor exhibited an ultrafast response (23.17%) to 500 ppb H 2 within 3.2 s. After a moderate temperature increase to 180°C, it also demonstrated significant sensing performance (46.3%) to 500 ppb NO 2 within 4 s. The electronic interaction mechanism of ZnO/ Ti 3 C 2 T x MXene heterostructures in H 2 and NO 2 detection was revealed through density functional theory calculations and in-situ Raman spectroscopy, clarifying the influence of interfacial charge transfer on sensing performance. Heterogeneous structures achieve the regulation of gas adsorption-induced electron rearrangement and carrier modulation by constructing interface charge-regulating channels, significantly enhancing the response rate, selectivity and reversibility in the detection of H 2 and NO 2 , thereby enabling highly sensitive and trace detection of the two gases.
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GREEN CHEMISTRY
·
2025
·
IF 9.2
Mengran Lou,Ruiying Wang,Luxiang Wang,Yang Wang,Mei Wu,Shengjiao Wen,Xia Kong,Taotao Lv,Bo Ma
Hydrogen has emerged as a promising clean energy source, driving extensive research into efficient electrocatalysts for the hydrogen evolution reaction (HER). This work reports the synthesis of a self-supported Co₂P/nitrogen-doped coal-based carbon fiber catalyst (Co₂P/N-C-CFs(S-ZIF-67)) with cobalt (Co) vacancies via pyrolysis of a nanoscale metal-organic framework (NMOF) precursor. Compared to conventional ZIF-67, NMOF of S-ZIF-67 (40 nm) derives smaller Co2P (7.3 nm), simultaneously generating hierarchical porosity with increased specific surface area. More importantly, the pyrolysis of S-ZIF-67 generates Co vacancies that optimize the electronic structure and increase the active site density of catalyst. Density functional theory (DFT) calculations confirm that these Co vacancies lower the d-band center and promote electron transfer within the catalyst. Furthermore, the N-C-CFs as supporter provides both structural flexibility and tunable hydrogen adsorption Gibbs free energy (ΔGH*). Consequently, Co₂P/N-C-CFs(ZIF-67) exhibits exceptional HER performance in 0.5 M H₂SO₄, requiring only 66 mV overpotential to reach 10 mA cm⁻² current density, and demonstrates remarkable stability for 120 h at 20 mA cm⁻². Notably, it surpasses both Co₂P/N-C-CFs(ZIF-67) and commercial 20% Pt/C under high current densities. This study establishes an effective strategy for designing advanced HER catalysts through precise control of NMOF size and vacancy engineering.
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Materials Today Communications
·
2025
·
IF 4.5
Jiahong Zheng,Yuhan Wang
In order to break the impasse of limited energy storage capacity in supercapacitors, it is essential to develop advanced electrode materials. In this work, a method for the construction of hierarchical Co x Ni 1-x S 2 microspheres based on MOF template derivatization strategy is proposed, with morphology control achieved through an in-situ solid-state sulfurization reaction. NiCo-LDH (NiCo layered double hydroxides) nanosheets were evenly grown on the surface of CoBTC (cobalt-benzene tricarboxylic acid based MOF) as a sacrificial template, and then sulfided to form Ni-Co sulfides with porous wrinkle structure, which effectively promoted the swift transfer of ions and electrons. Moreover, both of vulcanization temperature and sulfur source content were further systematically controlled to optimize the structure design and enhance electrochemical efficiency of the electrode materials. The as-prepared composites exhibit excellent specific capacitance (1 A·g −1 at 1243.69 F·g −1 ), along with reliable cycle stability, maintaining 90 % capacity after 1000 cycles, benefit from the synergistic effect between nickel and cobalt and the construction advantages of MOF-derived framework structures. The assembled ASC (asymmetric supercapacitor cell) device demonstrates an energy density of 38.19 Wh·kg −1 at a power density of 800 W·kg −1 and a cycle stability of 88 % after 1000 cycles. This approach offers a practical and efficient route to developing high-performance bimetallic sulfide electrode materials on a scalable level, demonstrating promising potential for widespread use in future energy storage technologies.
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Materials Today Bio
·
2025
·
IF 10.2
Dongdong Guo,Wenjie Wang,Dongyang Zhao,Tianyu Chen,Xingyu Ma,Yixiao Li,Xiaojun Zhang
Repairing large bone defects effectively requires concurrent osteogenesis and angiogenesis, a significant challenge for conventional biomaterials often limited by suboptimal structural design and an inability to provide spatiotemporally controlled bioactive cues. Here, we report a novel chemophysical dual-responsive system rationally designed to address this osteogenic-angiogenic coupling challenge. This system integrates a structurally engineered bimetallic FeCu-metal-organic framework (FeCu-MOF) within a poly(lactic acid)/hydroxyapatite (PLA/HA) scaffold. The engineered FeCu-MOF architecture enables the programmed and sustained co-release of Fe 3+ and Cu 2+ ions, providing tailored chemical signals. Synergistic pulsed electromagnetic field (PEMF) stimulation was introduced as a physical cue to further enhance the scaffold's bioactivity. The composite scaffolds, featuring interconnected hierarchical porosity and enhanced hydrophilicity due to FeCu-MOF incorporation, demonstrated distinct Fe 3+ /Cu 2+ release profiles. In vitro , these scaffolds exhibited excellent biocompatibility and significantly promoted bone marrow mesenchymal stem cells (BMSCs) proliferation and osteogenic differentiation. Notably, this structure-derived dual-ion release also indicated pro-angiogenic potential. Crucially, daily PEMF treatment synergistically amplified these cellular responses. In vivo evaluation in a rat cranial defect model confirmed the system's efficacy. While FeCu-MOF/PLA/HA scaffolds alone enhanced bone regeneration, their combination with PEMF yielded the most robust outcomes, characterized by markedly superior vascularized bone formation. Comprehensive analysis, including micro-CT, histology, and immunohistochemistry, confirmed these findings by demonstrating improved bone volume, density, and architecture, mature integrated tissue, and enhanced coupled expression of CD31 and osteogenic markers. In summary, the study validates a powerful synergistic strategy for enhanced bone regeneration. This strategy, integrating programmable, structure-derived bimetallic ion release with PEMF stimulation, successfully achieved synergistic angiogenic-osteogenic coupling, offering a promising approach for complex defect scenarios.
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PubMed
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Qinyi Zhang,Jiaqi Liang,Junyi Zhang,Zhidong Chang,Yanjun Zhao,Changyan Sun
Considering the potential risks of ferulic acid (FA), this study developed a novel fluorescent probe based on Zn-MOF for the efficient detection of FA in food. The Zn-MOF was successfully synthesized by solvothermal method, and its structure and stability were confirmed by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and powder X-ray diffraction (PXRD). It exhibited strong fluorescence at 420 nm under 348 nm excitation, and maintained 92.3 % of its fluorescence intensity after 7 days of ethanol immersion and 95.6 % at pH 3–12, demonstrating excellent chemical stability. The Zn-MOF could be used to detect FA and showed high sensitivity with the detection limit of 91.8 nM. The competitive experiments indicated that 17 common interferents had no significant effect on the detection (the fluorescence response change <5 %). The fluorescence of the sensing platform remained at 98.5 % after 5 cycles of use. Mechanism studies revealed that the fluorescence quenching was caused by the synergistic effect of photoinduced electron transfer, inner filter effect and competitive absorption. In the actual detection of corn wine samples, the method had a recovery rate of 100.7–104.1 % and a relative standard deviation (RSD) of less than 2.31 %, verifying its reliability in complex matrices. Furthermore, a fluorescent sensing composite material for FA was successfully developed by physically blending Zn-MOF with polyvinyl alcohol (PVA).
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Yaqiong Zhang,Junping Lv,Qin Zhou,Kaile Chu,Min Li,Yayuan Li,Jie An,Zhifang Wu,Sijin Li
Ratiometric fluorescent (RF) sensors, leveraging their inherent calibration mechanism, can greatly reduce the interference of irrelevant factors and exhibits superior detection sensitivity and more attractive visual detection effects in the process of quantitative analysis. Up to now, there are few probes that can detect fluorine by the proportional fluorescence signal. Herein, we constructed a RF probe for determination of fluorine by confining self-synthesized red emitting organic small molecules 10-(diethylamino)-3-hydroxy-5,6-dihydrobenzo[ c ]xanthen-12-ium (HTD) into the microchannels and cavity structures of UiO-66-NH 2 , exhibiting two emission maxima at 428 nm and 616 nm, respectively. After introducing fluoride into the system of probe, a drastic fluorescence enhancement at 428 nm was emerged, whereas the emission peak at 616 nm underwent minor fluctuations. The probe that has been developed enables the sensitive and selective detection of fluoride ions, exhibiting excellent linear relationships in the range of 0–100 μM. The detection limit value was estimated to be 6.93 μM. This unique ratiometric luminescence behavior of probe toward fluoride resulted from the creation of hydrogen bonds between fluoride and amino groups in HTD@UiO-66-NH 2 . Notably, the probe could utilize as an effective tool for detecting fluoride in cells with high-quality results, which could have important implications for research in biology, toxicology, and related fields. Simultaneously, its corresponding portable online test strips can be easily acquired and employed for fluoride detection through visual colorimetric analysis. The proposed method offers an alternative technology for quantifying fluoride levels in real-life water samples.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
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IF 5.4
Jiaqi Dang,Min Zhen,Jinning Gu,Yuting Niu,Yunfei Zheng
The detection of biomolecules using MOF-based nanozymes is a widely adopted strategy due to their abundant active sites and inherent enzymatic properties. In this study, we have synthesized three types of cerium metal-organic frameworks (Ce-MOFs) with oxidase (OXD)-like activity using a facile one-pot solvothermal method, simply by adjusting the concentrations of the raw ingredients, for the monitoring of biomolecules. The synthesized Ce-MOFs exhibit strong stability, a higher specific surface area, and more active sites, attributed to their MOF structure. These Ce-MOFs, with their excellent OXD-like activity, demonstrate satisfactory analytical performance in the quantitative determination of glutathione (GSH), showing a linear relationship within the range of 4.7 to 32.5 μM and detection limits as low as 42.76 nM. Furthermore, this colorimetric biosensor was successfully applied to monitor the content of GSH in the gingival crevicular fluid of patients with periodontitis. This paper extends the application of Ce-MOFs in bioassays and provides new insights into the application of OXD-like nanozymes in bioassays.
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Biao Li,Yuqi Liu,Baizhuang Li,Yusi He,Yufeng Zhang,Xinying Wang,Yuebin Feng,Wei Li
Tetracycline (TC) antibiotics in aquatic environments pose severe ecological and health risks due to their difficult biodegradability and environmental accumulation. Persulfate-based advanced oxidation process (PS-AOP) has been proven to be a promising method for TC degradation in wastewater treatment but requires efficient, stable catalysts. Herein, three melamine-modified POM@MOF composites WCo@C-1, WCo@C-5 and WCo@C-10 (WCo-PMOFs and melamine in mass ratios of 1:1, 1:5, and1:10, respectively) were synthesized by calcining a mixture of WCo-PMOFs and melamine, which were used as catalysts for peroxymonosulfate (PMS) activation to degrade TC efficiently. The results demonstrated that the TC degradation rate by WCo @ C-10 activated persulfate (PMS) reached 95.83 % within 2 h superior to that of WCo@C-1 and WCo@C-5 under the same experimental conditions. Notably, the WCo@C-10/PMS system exhibited exceptional cycling stability, maintaining a degradation efficiency of 83.51 % even after four consecutive cycles. The X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS) characterization results indicate that the WCo@C-10 composite material exhibits outstanding catalytic performance. This characteristic is mainly attributed to the significant improvement in the material's dispersion and its having the smallest impedance arc radius among a series of materials, which reflects a lower charge transfer resistance and excellent electrical conductivity. These characteristics synergistically promote the efficient conversion of Co(III) to Co(II). The quenching experiment combined with electron paramagnetic resonance (EPR) analysis confirmed that superoxide radicals (O 2 ·- ) and singlet oxygen ( 1 O₂) are the main reactive oxygen species in this system. This study provides a new idea for designing efficient PMS-based advanced oxidation systems.
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Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 6
·2653-2659
·
IF 10.733
Jian-Fang Wu,Xin Guo
Polymer electrolytes usually suffer from low ionic conductivity and poor stability against the lithium electrode. Taking advantage of nanostructured metal–organic frameworks (MOFs), novel nanoporous fillers, i.e., UIO/Li-IL, are developed for polymer electrolytes; in UIO/Li-IL, a Li-containing ionic liquid (Li-IL) is absorbed in UIO-66 MOFs. These fillers are multifunctional: high ionic conductivity and capability to suppress the crystallinity and to improve the stability of polyethylene oxide (PEO) against the lithium electrode. PEO-n-UIO composite polymer electrolytes are formed by dispersing the multifunctional fillers in PEO; the conductivity of the PEO-n-UIO solid electrolytes is increased by a factor of ∼37 to 1.3 × 10−4 S cm−1 at 30 °C with 40% UIO/Li-IL, and the current density for stable Li plating/stripping in PEO-n-UIO solid electrolytes is enhanced to 500 μA cm−2 at 60 °C. Solid-state lithium batteries based on the PEO-n-UIO solid electrolyte show an initial discharge capacity of ∼151 mA h g−1 with a capacity retention of 95% after 100 cycles at 0.5C and 60 °C. Our work pioneers novel multifunctional fillers to boost the performances of composite polymer electrolytes for high energy density, safe and long lifetime energy storage systems.
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DALTON TRANSACTIONS
·
2025
·Vol. 54
·期 44
·16582-16592
·
IF 3.3
Juan Zhang,Bo Jin,Rufang Peng
The high thermal decomposition temperature and non-concentrated exothermicity of ammonium perchlorate (AP) have constrained the advancement of solid propellants. Constructing catalysts with uniformly dispersed catalytic sites is an effective strategy to achieve efficient thermal decomposition of AP. In light of this, we innovatively proposed encapsulating transition metals M(II) (M = Co/Ni/Zn/Mn) into the pores of Pb-BTC, thereby constructing a series of novel bimetallic MOF catalysts (Pb–M-BTC) for the efficient catalytic thermal decomposition of AP. The research results indicate that the uniform dispersion of Pb–M-BTC metal active centers at the molecular level, combined with the unique electronic structure and synergistic effects between the bimetals, ensures high consistency and efficiency in the catalytic thermal decomposition process of AP. The introduction of transition metals further reduces the high-temperature decomposition temperature of AP.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·Vol. 65
·期 29
·15588-15602
·
IF 3.9
Zhang Yanji,Zhu Qicai,Yang Siyi,Han Zhuoxi,Xu Zhiyong,Xie Yuhui,Wu Feng,Mei Yi,Xie Delong,Feng Dong
A key challenge in lightweight broadband electromagnetic
wave (EMW)
absorption is balancing strong attenuation, good impedance matching,
and structural integrity─excessive conductivity enhances dielectric
loss but often causes severe surface reflection that blocks wave penetration.
Herein, a 3D x CuFe/GPC heterostructure was constructed
by anchoring bimetallic CuFe-MOF derivatives onto a G/BPNS/CNT hybrid
conductive framework, where G, P, and C represent graphite, black
phosphorus nanosheets, and carbon nanotubes, respectively. CuFe-MOF
derivatives provide magnetic-dielectric loss, BPNS introduce phosphorus-related
polarization sites, and graphite/CNT meshes build long-range conductive
pathways, with CNTs acting as one-dimensional bridges. This coordinated
design enables the optimized 0.1CuFe/GPC composite to achieve an RL min of −46.3 dB at 2.1 mm and an EAB
of 4.03 GHz at 1.3 mm. RCS simulations based on a PEC plate model
show an RCS reduction exceeding 30 dB. Beyond EMW absorption, 0.1CuFe/GPC
serves as a microwave-to-thermal transducer for rapid expandable polystyrene
(ePS) foaming, producing lightweight multifunctional foams with robust
mechanical integrity. This work provides a practical route toward
integrated electromagnetic protection and lightweight structural-functional
materials.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yong Li,Junjie He,Tianhu Long,Jing Liu,Yulun Nie,Shaowei Li
An MOF-based molecularly imprinted nanozyme was designed and prepared. • The nanozyme was acted as ratiometric sensor for fluorescence detection of carbaryl. • The sensor possessed the highly selectivity and sensitivity for carbaryl recognition. • The detection mechanism of MOF based nanozyme for carbaryl was investigated. Metal-organic framework (MOF) nanozymes are widely utilized in environmental pollutant detection, but their practical application is often restricted by a lack of intrinsic selectivity. To address this challenge, we developed a molecularly imprinted polymer coated Fe-MOF nanozyme (Fe-MOF@MIP) via a metal coordination and hydrogen-bonding assembly strategy. Fe-MOF@MIP integrates the peroxidase activity of Fe-MOF core with the specific recognition capability of the carbaryl-imprinted shell. And the binding of carbaryl to the specific imprinted cavities sterically blocks the surface channels, preventing the generation of reactive oxygen species and thereby modulating the fluorescence signal. Based on this inhibition mechanism, a ratiometric fluorescence sensor was constructed for sensitive detection of carbaryl with a detection limit of 0.039 μM, accompanying with the fluorescence color changing from yellow to blue under a UV lamp. More importantly, Fe-MOF@MIP exhibited high selectivity and anti-interference ability for carbaryl detection. The sensor was successfully applied to the analysis of real water and fruit samples, demonstrating their robustness. This study provides a cost-effective and simple strategy to overcome the selectivity bottleneck of nanozymes, offering a promising platform for carbaryl monitoring. Download: Download high-res image (88KB) Download: Download full-size image
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