Sustainable Materials and Technologies
·
2025
·
IF 9.2
Yingli Yang,Hailiang Zhang,Xiaoxia Jia,Guoli Zhang,Gang Li,Kaiying Wang
Metal-organic frameworks (MOFs) have emerged as promising supercapacitor electrode materials due to their structural tunability and high density of electroactive sites. However, intrinsically low electrical conductivity fundamentally constrains their electrochemical performance. To overcome this limitation, we implement a defect engineering strategy, constructing missing-linker defects and Ni dopants within 2D CoNi-BTC/IPA nanosheets via one-pot solvothermal synthesis. This synergistic strategy simultaneously modulates the electronic structure of MOFs while generating supplementary electroactive sites, thereby enhancing charge transfer kinetics and specific capacity—collectively enabling exceptional electrochemical performance. The optimized architecture achieves a high specific capacity of 1220.4 F g −1 at a current density of 0.5 A g −1 , representing a five-fold improvement compared to Co-BTC (226.9 F g −1 at 0.5 A g −1 ). Even with an increase in current density from 0.5 to 10 A g −1 , it retains an excellent capacity retention rate of 96.8 %. The CoNi-BTC/IPA//AC hybrid supercapacitor device showcases a power density of 687.7 W kg −1 alongside an energy density of 50.4 Wh kg −1 . Furthermore, it maintains 80 % capacity retention after undergoing 8000 cycles of charging and discharging.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Miwan Shi,Yuan Weng,Shengxi Wu,Lu Zhang,Chaoyue Deng,Pengxiang Li,Yunmin Wang,Kui Gu
Utilizing efficient diagnostic methods to assess antibody levels in unexposed individuals and vaccinated populations is of significant importance for the prevention and control of rabies virus (RV). In this study, we developed a novel label-free electrochemical immunosensor based on AgNPs@Co( II )MOFs@PtNPs composite materials for the rapid detection of RV antibodies. The RV nucleocapsid protein (NP) antigen and its nanobodies were firstly prepared using genetic engineering techniques as reagent materials. Next, a bimetallic composite of AgNPs@Co( II )MOFs@PtNPs was synthesized via a mixed solvothermal method, with cobalt-based metal-organic frameworks (Co-MOFs) serving as the substrate. This composite was deposited onto the surface of a glassy carbon electrode, where the RV-NP antigen was covalently attached to the Co-MOF surface, enabling specific binding with RV antibodies. The antigen-antibody interaction resulted in detectable changes in the current, facilitating the sensing process. Finally, the developed immunosensor exhibited a linear detection range for RV NP antibodies from 7.576 × 10 −11 mol/L to 3.788 × 10 −5 mol/L, with a correlation coefficient (R 2 ) of 0.9965 in differential pulse voltammetry, and the limit of detection was defined as 4.508 × 10 −10 mol/L. Furthermore, the newly immunosensor demonstrated excellent repeatability, stability, specificity, and clinical applicability, making it a promising, precise, and cost-effective tool for the early screening of RV antibodies.
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jia Su,Xinyu Pei,Hongying Shi,Jiajia Luo,Yi Chen,Qin Yang,Jiwei Huang,Wenzhai Cao,Jianwen Zhang,Junying Chen
Magnesium alloys are promising for biodegradable medical devices due to their low density, high specific strength, and excellent biocompatibility. However, their rapid corrosion, protein fouling, and bacterial adhesion severely limit clinical applications. Here, a stratified-rock-inspired micro/nano-structured ZnS/Zn-MOFs coating was fabricated on AZ31B via a one-step hydrothermal route and post-functionalized with stearic acid (SA) and chloramphenicol (CAP) to afford a superhydrophobic ZnS/Zn-MOFs@SC surface (water contact angle ≈ 164°). The coating retained its superhydrophobicity after ultrasonication, adhesive-tape peeling, and sandpaper abrasion. Electrochemical measurements revealed that the corrosion current density (I corr ) decreased from ∼10 -3 A cm −2 (bare alloy) to 7.66 × 10 -7 A cm −2 , corresponding to a four-order-of-magnitude improvement, while the diameter of the capacitive loop in the Nyquist plot increased by five orders of magnitude. In vitro bacterial tests show the coating fully prevents bacterial adhesion. The inhibition zones for E. coli and S. epidermidis reach 3.1 cm and 4.4 cm. And it has been established that bacterial growth levels below the detection limit (10 5 CFU cm −2 ) cannot effectively evaluate its antimicrobial efficacy. These results demonstrate that the ZnS/Zn-MOFs@SC coating simultaneously provides robust corrosion protection, anti-fouling, and antibacterial activities, offering great potential for next-generation biodegradable implants.
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DIAMOND AND RELATED MATERIALS
·
2024
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IF 4.3
Tian-Li Meng,Jia-Wei Wang,Ying-Xia Ma,Xin-Quan Chen,Lei Lei,Jing Li,Fen Ran
Layered double hydroxide (LDH), as an electrode material, consists of positively charged layers and interlayer hydrated anions and is endowed with promising prospects in supercapacitors (SCs) due to its large specific surface area, tunable metal ions, abundant redox active sites, and low cost. Moreover, metal-organic frameworks (MOFs) exhibit adjustable pore sizes, while multi-walled carbon nanotubes (MWCNTs) boast exceptional electrical conductivity. Hence, in this work, flower-like nickel/manganese layered double hydroxide (Ni/Mn-LDH) was introduced into nanohybrid of MWCNTs decorated with nickel metal-organic frameworks (Ni-MOFs/MWCNTs) to fabricate a novel Ni-MOFs/MWCNTs@Ni/Mn-LDH nanohybrid as electrode material for SCs using a two-step solvothermal method. In the composite structure of the novel Ni-MOFs/MWCNTs@Ni/Mn-LDH nanohybrid, the flower-like assembly of Ni/Mn-LDH nanosheets was seamlessly integrated with MWCNTs adorning the Ni-MOFs, creating an interconnected hierarchical porous network. This distinctive structure, coupled with the synergistic effects of its components, facilitated the swift diffusion of electrolyte ions. Furthermore, it enhanced the accessibility to more active sites at the interfaces during the redox process, thereby contributing considerably to an improved electrochemical performance. The specific capacity of the Ni-MOFs/MWCNTs@Ni/Mn-LDH nanohybrid as electrode material obtained at the optimal experimental conditions was 1151.0C g −1 at 1.0 A g −1 . The assembled asymmetric supercapacitor (ASC) had an energy density of 25.6 Wh kg −1 at a power density of 845.3 W kg −1 . The fabrication strategy of the Ni-MOFs/MWCNTs@Ni/Mn-LDH could be extended to synthesize other nanohybrid.
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Nanomaterials
·
2025
·Vol. 15
·期 8
·618
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IF 4.3
Ting Liu,Yun Wu,Hao Wang,Jichang Lu,Yongming Luo
The urgent need for sustainable CO2conversion technologies has driven the development of advanced photocatalysts that harness solar energy. This study employs a CTAB-assisted solvothermal method to fabricate a Z-scheme heterojunction Fe-MOFs/VO-Bi2WO6(FM/VO-BWO) for photocatalytic CO2reduction. Positron annihilation lifetime spectroscopy (PALS) was employed to confirm the existence of oxygen vacancies, while spherical aberration-corrected transmission electron microscope (STEM) characterization verified the successful construction of heterointerfaces. X-ray absorption fine structure (XAFS) spectra confirmed that the defect configuration and heterostructure changed the surface chemical valence state. The optimized 1.0FM/VO-BWO composite demonstrated exceptional photocatalytic performance, achieving CO and CH4yields of 60.48 and 4.3 μmol/g, respectively, under visible-light 11.8- and 1.5-fold enhancements over pristine Bi2WO6. The enhanced performance is attributed to oxygen vacancy-induced active sites facilitating CO₂ adsorption/activation. In situ molecular spectroscopy confirmed the formation of critical CO2-derived intermediates (COOH* and CHO*) through surface interactions involving four-coordinated and two-coordinated hydrogen-bonded water molecules. Furthermore, the accelerated interfacial charge transfer efficiency mediated by the Z-scheme heterojunction has been conclusively demonstrated. This work establishes a paradigm for defect-mediated heterojunction design, offering a sustainable route for solar fuel production.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Cao Yang,Shanshan Shang,Yixuan Wang,Pei Wang,Lianpeng Sun,Xiao-yan Li
Single-atom catalysts (SACs) have garnered significant attention owing to their high reactivity; however, precise control of their electronic structure for Fenton-like process remains a challenge. In this study, we develop a novel technique for regulating the electronic environment of Cu-SACs to activate peroxymonosulfate (PMS) for highly effective degradation of emerging organic pollutants in water. By in-situ axial modification of Cu-SACs with Cu 2 O nanoclusters within a porphyrin metal–organic framework (Cu 2 O clu -Cu SA /PMOF), we finely tuned the electronic structure of Cu-SACs, leading to the selective generation of singlet oxygen ( 1 O 2 ) as the predominant reactive species in a nonradical Fenton-like process. The rate constant of the Cu 2 O clu -Cu SA /PMOF catalyst for PMS oxidation of sulfamethoxazole (SMX) surpassed that of Cu 2 O and Cu SA /PMOF by 12.9 and 3.7 times, respectively, outperforming most state-of-the-art heterogeneous catalysts for PMS activation. Density functional theory calculations elucidated that the modulation of electronic structure of the Cu sites in Cu 2 O clu -Cu SA /PMOF led to the preferred adsorption of PMS in the terminal-O mode and altered the electron transfer from PMS to the Cu sites for 1 O 2 generation through the self-reaction of SO 5 •− intermediates. This work presents a new material strategy by modulating the functionality of single-atoms via axial incorporation of nanoclusters in MOFs, realizing a highly efficient and selective Fenton-like oxidation process for sustainable water purification.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Yanlin Zhang,Chaowei Jia,Quan Kong,Nanyu Fan,Gang Chen,Hongtao Guan,Chengjun Dong
The development of acetone gas sensors is desirable but challenging for both air quality monitoring and medical diagnosis. Herein, starting from bimetallic In/Ga metal–organic frameworks (MOFs) (MIL-68 (In/Ga)), a facile strategy is proposed to couple with zinc ions to design In/Ga oxide (IGO)@ZnO core–shell nanotubes for efficient acetone detection. In such a heterostructure, tiny ZnO nanoparticles are closely decorated on IGO nanotubes, which is beneficial to enlarge the specific surface area and create rich oxygen vacancies and heterojunction interfaces. Benefiting from the structural merits and synergetic effects, the IGO@ZnO-based gas sensor exhibits a low detection limitation (200 ppb), a high response, good linearity relationship between the sensing responses and wide testing acetone concentrations, and fast response and recovery time (6.8/6.1 s) with good selectivity and stability. These sensing performances strongly indicate the practical application to quantitatively detect acetone.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yuehong Xie,Chao Feng,Yuan Guo,Shiang Li,Cheng Guo,Yi Zhang,Jide Wang
This paper introduces a facile strategy to fabricate trifunctional electocatalysts through one pool treatment on MOFs to obtain carbon nanotube coated ultrafine CoNi alloy (CoNi@NCNTs) nanocomposites with N-doped rich-defect and abundant cavity structure. During the pyrolysis process, volatile CNx species from dicyandiamide were trapped by ZIF-67@Ni-ZIF nanosheets, simultaneously introducing nitrogen atom into carbon matrix to achieve the rich-defect porous nanotubes and abundant cavity structure. The as-prepared nanomaterials can simultaneously boost the ORR, OER and HER catalytic activity with strong durability. Significantly, the CoNi@NCNTs-700 exhibits excellent electrocatalytic activity including half-wave potential (E ORR, 1/2 ) of 0.80 V, lower operating voltage (E OER, 10 ) of 1.60 V at 10 mA cm −2 and potential difference (ΔE) of 0.80 V between E OER, 10 to E ORR, 1/2 in 0.1 M KOH, and low overpotential (E HER, 10 ) of −0.130 V reaching 10 mA cm −2 in acidic medium. The remarkable activity is ascribed to defect-rich porous carbon nanotubes structure and the synergistic effect between CoNi alloy nanoparticles, N-dope carbon and CoNi-Nx. And hollow structure facilitates to improve conductivity and stability. This work offers a useful archetypical template to design and construct efficient and stable trifunctional electrocatalysts, illustrating its viability for practical applications of energy conversion and storage devices.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Zhongyu Yang,Long Zhang,Yiyuan Zhang,Mengyuan Bai,Yunchuan Zhang,Zihan Yue,Erhong Duan
Pyrolysis process of metal-organic frameworks (MOFs) was analyzed by thermal analysis kinetics for the study of the synthesis of MOFs-based carbon materials with high adsorption performance. The process was studied based on the thermogravimetric mass spectrometry (TG-MS), through which the gas products of the pyrolysis process were detected. The HKUST-1 and MIL-101 were prepared by solvothermal method and characterized by XRD, BET, SEM and TEM. The characterization results showed that HKUST-1 and MIL-101 have been successfully prepared with cubic octahedral morphology and specific surface areas up to 1477.50 m 2 /g and 2239.88 m 2 /g, respectively. The data of TG-DTG showed that the pyrolysis of HKUST-1 and MIL-101 could be divided into three stages and seven stages, respectively. The kinetic triplets of different pyrolysis stages were calculated by iso-conversional methods, and the gas products decomposed were analyzed, through which the pyrolysis mechanism of MOFs was inferred. The first pyrolysis stages of HKUST-1 and MIL-101 were both dehydration stages, the E values of both were less than 100 kJ/mol, and the pyrolysis mechanism of both two materials at this stage were the chemical reaction mechanism. The average apparent activation energy of the main pyrolysis carbonization stages of both was about 180 kJ/mol, and both followed the random nucleation and subsequent growth mechanism, indicating that there were some uniformities between the two materials in the main pyrolysis stage. The main gas products in this stage were CO, CO 2 and benzene. The apparent activation energy of the final deep carbonization stage were 564.36 and 387.60 kJ/mol, respectively, and mechanisms followed were chemical reactions and three-dimensional diffusion mechanisms, meaning that there were some differences between the two materials in the deepening stage.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Siyuan Wang,Shuda Liu,Shuyun Meng,Yuqing Li,Na Dong,Zuo Chen,Wenjia Li,Dong Liu,Tianyan You
Microcystin-LR (MC-LR), a toxic cyanotoxin, poses severe risks to environmental and human health with its efficient detection urgently required for water safety monitoring. Here, we reported a photoelectrochemical (PEC)-surface-enhanced Raman scattering (SERS) dual-mode aptasensor based on WS 2 /copper(II) meso-tetra(4-carboxyphenyl) porphyrin (WS₂/Cu-TCPP) MOFs Z-scheme heterojunction with a single laser source to produce photocurrent and SERS signals. To access interference between PEC and SERS signals, their correlation was systematically examined by applying a certain bias voltage. This bias voltage drives photogenerated electrons into external circuit, thereby enhancing carrier separation efficiency and suppressing the return of Raman photons to the ground state. In this way, a complementary “PEC-enhancement/SERS-attenuation” signal pattern can be achieved to allow better reliability for biosensing. The presence of ascorbic acid (AA) replicated an identical response to confirm competitive coupling between PEC and SERS derived from WS₂/Cu-TCPP heterojunction. Based on this signal transduction mechanism and localized generated AA by magnetic separation, a dual-mode aptasensor was developed for MC-LR detection with superior sensitivity and interference resistance. It allowed a linear range of 0.01–50 ng mL −1 and a detection limit of 0.14 pg mL −1 for MC-LR as well as high selectivity and stability for real water samples analysis. This work should offer an efficient paradigm for precise analysis of hazardous pollutants in complex matrices.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Haiqing Gao,Qin Ji,Bin Chi,Caixue Lin,Gang Ding,Yingxi Wang,Xiaolan Yu,Zushun Xu,Run Zhang,Ling Li,Jing Wang
Targeting excess H 2 O 2 in the tumor microenvironment, nanotheranostic agents for catalytic therapy are designed based on Fenton reaction, catalyzing H 2 O 2 into oxygen and hydroxyl radical ( OH). But the catalytic efficiency in tumor microenvironment is not satisfactory. In order to solve the problem, a series of bimetallic-dual ligands metal-organic frameworks Fe/Tm-MOFs were designed, that Fe 3+ and Tm 3+ as metalions, 2-methylimidazole and trimesic acid as ligands. Due to the doped Tm 3+ in Fe/Tm-MOFs and the conjugated structures formed by two ligands, the rate of electron transfer was improved, thus promoting the generation of OH at some extent. In addition, the photothermal effect of Fe/Tm-MOFs further promotes the generation of OH, which was evidenced by the 3,3′,5,5′-tetramethylbenzidine(TMB). Combining the drug loading and release capabilities of Fe/Tm-MOFs, synergetic therapy of photothermal/chemo-/catalytic therapy can be achieved. In vitro results reveal that DOX release behaviors are both pH- and thermal-responsive. In vivo anti-cancer results show that the tumors of mice almost disappeared within 10 days, which were injected with Fe/Tm-MOFs/DOX and irradiated with 808 nm for 10 min. Thus, an excellent therapeutic performance has been achieved. Besides, Fe/Tm-MOFs can serve as a multimodality bioimaging contrast agent, covering fluorescence imaging, photothermal imaging and magnetic resonance imaging. Thus, an all-in-one nanotheranostic agent is constructed, improving the catalytic efficiency and providing a novel method to design an efficient nanotheranostic agent.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Zishuo Zhang,Wanpeng Ma,Bing Yan
Metal-organic frameworks (MOFs) are a promising class of porous crystalline materials which can be functionalized by versatile postsynthetic modification (PSM) for further practical applications. Whereas, such crystalline nature of MOFs stands as a serious obstacle to their desired shaping and manufacture for further practical applications. Herein, a multi-step tandem functionalization assembly strategy is employed to fabricate a luminescent MOF-based hybrid polymeric film to endow the luminescent MOFs with processability and applicability. In detail, Eu 3+ ions are introduced into ZnMOF-5-NH 2 frameworks to create a red emitting-center firstly. Next, methacrylic anhydride is incorporated to react with amino functional groups of Eu-ZnMOF-5-NH 2 to obtain Eu-MOF-L with unsaturated bonds by a covalent PSM strategy. Finally, the copolymerization reaction took place between Eu-MOF-L and monomers (butyl methacrylate) which initiated by benzoyl peroxide . The polymeric hybrid film (Eu-MOF-L@PBMA film) is soft, flexible, and homogeneous. The physical characterization and the luminescence properties of these hybrid materials were studied in details. The multi-color luminescence of these hybrids and their polymeric hybrid films are tuned by optimizing the critical parameters to serve as a white-light emitting device. Furthermore, Eu-MOF-L@PBMA film is utilized for the detection of volatile organic vapors. In terms of their distinct color variation, an effective dual-readout method assists in sensing volatile organic vapors, especially organic amine vapors.
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