CATALYSIS LETTERS
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2024
·
IF 2.3
Feng Guo,Wang Xu,Wang Yajie,Sun Hongxin,Li Guohua
In PMS catalytic oxidation studies, we design and prepare a Mn 3 O 4 /CuO (CMO-2) composite catalyst using metal–organic frameworks (MOFs) as precursors. Compared with Mn 3 O 4 , its activated per-oxy-monosulfate activation catalyzed the degradation of pollutants with nearly six times higher activity efficiency. The experimental findings demonstrate that CMO-2 derived from metal–organic frameworks offer the advantages of wide adaptability to solution pH, along with improved versatility, stability, and recyclability. Further experiments involving radical scavenging, electrochemistry, and electron spin resonance (EPR) techniques confirm that the CMO-2 derived from MOF structures exhibit more significant interfacial engineering effects. This leads to an expansion of active interfaces, enhancing the accessibility and dispersion of active sites. Consequently, it significantly improves the efficiency of electron-transfer reactions and promotes a wide range of reactive oxygen species (ROSs), including SO 4 •− •OH and 1 O 2 . Graphical Abstract Based on the synergistic effect of copper-manganese bimetallic, the copper-manganese composite catalyst (CMO-2) prepared by doping 0.5 g of Cu-MOF showed the best catalytic activity in activating PMS, and the resulting ROS S could efficiently degrade organic pollutants.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Yiming Guo,Yaowei Zhu,Jun Sun,Yongxing Lin,Xiangyang Li,Gang Liu,Yi Gong,Xian Zhang,Xingyou Tian,Xiaoxiao Li,Lin Chen
Obtaining uniformly dispersed particles within a carbon skeleton using metal-organic frameworks (MOFs) as a precursor is crucial for constructing multiple heterogeneous interfaces that enhance electromagnetic wave (EMW) absorption. Herein, MOF-derived carbon nanotubes (CNTs) bridged cobalt/molybdenum carbide@N-doped carbon (Co/MoC@NC) composites with honeycomb-like porosity were synthesized using an ion-exchange strategy followed by pyrolysis. Theoretical calculations and experimental observations confirm the existence of a heterogeneous interface between MoC and Co. Enhanced Co doping accelerates charge transfer from Co to MoC, thereby increasing interfacial polarization. Furthermore, the CNTs catalytically generated by Co facilitate the formation of conductive pathways between the honeycomb-like porous structure of Co/MoC@NC. This enhances conductivity and optimizes impedance matching. Flexible control of the dielectric properties is achieved by adjusting the level of Co doping, which results in tunable microwave absorption (MA) properties. As a result, the minimum reflection loss ( RL min ) of Co/MoC@NC reaches −68.68 dB at a thickness of 1.83 mm, while the effective absorption bandwidth (EAB) is 4.45 GHz at a thickness of 1.85 mm. This study presents a novel approach to utilizing honeycomb-like porous MOF-derived heterojunctions for the precise regulation of MA.
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DESALINATION
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2024
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IF 8.3
Zongjie Li,Zhongye Guo,Jingwei Xie,Guomin Zhao,Yong Liu
As a promising desalination technology, photothermal membrane distillation (PMD) is confronted with challenges such as low freshwater yield and membrane fouling. Herein, we have introduced a copper-based metal-organic framework (Cu-CAT) into a hydrophilic/superhydrophobic polyvinylidene fluoride (PVDF) Janus tree-like nanofiber membrane (TLNMs) to construct photothermal Janus TLNMs (P-Janus TLNMs) for enhanced PMD. Given the exceptional photothermal properties of the hydrophilic Cu-CAT layer, coupled with the fine pore structure and elevated porosity characteristics of the superhydrophobic PVDF TLNMs, P-Janus TLNMs have demonstrated outstanding performance when integrated into a PMD system. Upon exposure to solar illumination of 1 kW·m −2 , the P-Janus TLNMs achieved a remarkable surface temperature of 88 °C, yielding a permeation flux of 1.46 L m −2 h −1 , a salt rejection rate exceeding 99.99 %, and an energy utilization rate of 81 %. Furthermore, after 20 days of continuous operation with simulated seawater containing oil and surfactant, the P-Janus TLNMs presented a salt rejection of 99.9 % and a stable permeation flux of 1.71 L m −2 h −1 at the feed/permeate temperatures of 24/20 °C. This work introduces a novel membrane with immense potential for boosting permeation flux and enhancing anti-fouling properties in PMD, thereby advancing the frontier of sustainable seawater desalination.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 6
·1-14
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IF 5.3
Guo Qi,Wang Du,Ma Fei,Fang Mengxue,Zhang Liangxiao,Li Peiwu,Yu Li
Phytosterols (PSs), a class of naturally occurring bioactive lipid compounds, have been found to possess a significant cholesterol-lowering effect. In developing countries, the consumption of rapeseed oil is the primary pathway of PS intake for the general population. However, developing low-cost, real-time, and high-throughput screening techniques for PSs remains a challenge. Here, a Cu-based nanocomposite CuOx@C was synthesized via a simple method of the calcination of HKUST-1 and systematically characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The CuOx@C demonstrated excellent peroxidase-like (POD-like) activity, functioning as a peroxidase mimic to facilitate the catalysis of 3,3′,5,5′-tetramethylbenzidine (TMB) into its oxidized form (oxTMB), thereby initiating a discernible color response. On the basis of this discovery, a CuOx@C-based colorimetric method for detecting total sterols in rapeseed was successfully constructed via cascade reactions. After optimizing the conditions, the high-throughput screening of total sterols in rapeseed could be completed in only 21 min, which significantly facilitated the sensing of PSs. A linear range of 0.6–6 mg/g was achieved for the detection of total sterols in rapeseed samples, thereby satisfying the requirements for detection. In addition, due to the high stability of CuOx@C and the specificity of cholesterol oxidase, the developed method had excellent stability and selectivity toward PSs, indicating that this work has huge prospects for commercial application. This innovative work overcomes the limitation of the instrumental method and provides a portable and reliable tool for total sterols detection. It can also facilitate the development of oilseeds with a high content of PSs. Graphical abstract
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CHEMICAL PHYSICS LETTERS
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2025
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IF 3.1
Jiaoyang Hao,Lin Tan,Jiaqi Xu,Xiaowei Ma
Metal organic frameworks (MOFs) derived materials have attracted a lot of attention in the field of electromagnetic wave (EMW) absorption. In this regard, we improved the EMW absorption performance of Ni-based MOF derived materials by introducing sulfur and nitrogen dual-doped graphene (N,S-GS), which possesses good electrical conductivity. The minimum reflection loss (RL min ) of Ni/C/N,S-GS can reach −51.4 dB at 10.1 GHz when the absorber thickness is only 2.43 mm, with an effective absorption bandwidth (EAB) of 3.04 GHz. This work provides us with a novel strategy for the synthesis of composites with high-performance microwave absorption for practical applications.
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Small
·
2024
·
IF 13
Jia Chen,Maoheng Fei,Meijun Ni,Yilin Wang,Zhifang Liu,Yixi Xie,Pengcheng Zhao,Zhiyong Zhang,Junjie Fei
In this work, multi-layer Ti 3 C 2 – carbon nanotubes – gold nanoparticles (Ti 3 C 2 -CNTs-Au) and cyclodextrin metal-organic framework – carbon nanotubes (CD-MOF-CNTs) have been prepared by in situ growth method and used to construct the ultra-sensitive rutin electrochemical sensor for the first time. Among them, the large number of metal active sites of Ti 3 C 2 , the high electron transfer efficiency of CNTS, and the good catalytic properties of AuNPs significantly enhance the electrochemical properties of the composite carbon nanomaterials. Interestingly, CD-MOF has a unique host–guest recognition and a large number of cavities, molecular gaps, and surface reactive groups, which gives the composite outstanding accumulation properties and selectivity for rutin. Under the optimized conditions, the constructed novel sensor has satisfactory detection performance for rutin in the range of 2 × 10 −9 to 8 × 10 −7 M with a limit of detection of 6.5 × 10 −10 M. In addition, the sensor exhibits amazing anti-interference performance against rutin in some flavonoid compounds and can be used to test natural plant samples (buckwheat, Cymbopogon distans , and flos sophorae immaturus). This work has promising applications in the field of environmental and food analysis, and exploring new directions for the application of Mxene-based composites.
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ANALYTICAL CHEMISTRY
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2024
·
IF 6.7
Jin Wang,Yudan Shen,Yuting Zhuang,Jinyi Wang,Yue Zhang
The development of abiotic protein affinity adsorbents remains challenging for the accurate acquisition and analysis of specific protein species. Inspired by bacterial cell walls, a hierarchical hybrid framework is fabricated through the oriented growth of an Fe-based metal organic framework (MOF) on V2C MXene for the efficient separation of lysozyme (Lys). After directed evolution of adsorptive materials, the MXene@MOF composite rich in hydroxyl groups (termed as MX@MOF-DH) is found exerting exceptional affinity for Lys. Benefiting from hydrogen-bonding, coordination, and electrostatic interaction-mediated multimodal and multivalent affinity, MX@MOF-DH reveals rapid adsorption rate (5 min), superb enrichment factor (83.1), and favorable binding capacity (609.7 mg g–1), which outperforms other latest adsorbents. Moreover, femtomolar sensitivity is achieved even in the presence of high-abundant interfering proteins, as confirmed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometer analysis. This work not only provides an efficient approach for selective enrichment of lysozyme but also paves an avenue to construct the protein affinity reagents for specific biological medicine and analysis applications.
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Journal of Materials Chemistry C
·
2024
·
IF 5.7
Yuedan Wang,Tao Yang,Panpan Hao,Changhui Li,Mufang Li,Yan Tan,Dong Wang
The Fe-MOF@PANI/Carbon fiber was prepared by solvothermal method and used as the gate of organic photoelectrochemical transistor (OPECT). The ratio of Fe-MOF to PANI was optimized to enhance the photoelectric signal transduction. In addition, the vertical configuration of devices was adopted to improve the sensor property. Under light illumination, the device shows good photoelectric conversion ability, periodic stability and duration stability. The uric acid biosensor was prepared by modifying the gate with urate oxidase. The sensitivity of sensors in the absence of light and under illumination is compared. The results show that the sensitivity of the sensor is significantly improved to 91.65 mV/decade under light. The linear relationship is good in the range of 1 nM-5 mM, with a correlation coefficient of R2=0.9506. The sensor can also be used under bending conditions and has been successfully applied to the detection of uric acid in human sweat samples, providing a viable solution for wearable electronic devices.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Dan Li,Rui Zhang,Yinpeng Le,Ting Zhang,Dandan Luo,Han Zhang,Jun Li,Ruibo Zhao,Yeting Hu,Xiangdong Kong
Nanomaterials have been extensively exploited in tumor treatment, leading to numerous innovative strategies for cancer therapy. While nanomedicines present immense potential, their application in cancer therapy is characterized by significant complexity and unpredictability, especially regarding biocompatibility and anticancer efficiency. These considerations underscore the essential need for the development of ex vivo research models, which provide invaluable insights and understanding into the biosafety and efficacy of nanomedicines in oncology. Fortunately, the emergence of organoid technology offers a novel approach to the preclinical evaluation of the anticancer efficacy of nanomedicines in vitro. Hence, in this study, we constructed intestine and hepatocyte organoid models (Intestine-orgs and Hep-orgs) for assessing intestinal and hepatic toxicity at the microtissue level. We utilized three typical metal–organic frameworks (MOFs), ZIF-8, ZIF-67, and MIL-125, as nanomedicines to further detect their interactions with organoids. Subsequently, the MIL-125 with biocompatibility loaded methotrexate (MTX), forming the nanomedicine (MIL-125-PEG-MTX), indicated a high loading efficiency (82%) and a well-release capability in an acid microenvironment. More importantly, the anticancer effect of the nanomedicine was investigated using an in vitro patient-derived organoids (PDOs) model, achieving inhibition rates of 48% and 78% for PDO-1 and PDO-2, respectively, demonstrating that PDOs could predict clinical response and facilitate prospective therapeutic selection. These achievements presented great potential for organoid-based ex vivo models for nano theragnostic evaluation in biosafety and function.
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BIOSENSORS & BIOELECTRONICS
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2025
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IF 10.5
Jiuhong Zhao,Jinnan Zhao,Xiaoyu Zhang,Guixia Ling,Peng Zhang
The level of dopamine (DA) in the human body has a certain correlation with neurological diseases. However, most detection methods of DA are complex and expensive. In this study, laccase-like DNAzyme@MOF with improved pH stability was successfully prepared. DNAzyme@MOF could catalyze the chromogenic substrate to change the color of the solution for the detection of DA in ISF. The addition of DNAzyme made DNAzyme@MOF possess higher stability and enzyme-like activity. The operation process was simple, rapid, and intuitive. In addition, the in vivo DA content in skin interstitial fluid (ISF) was analyzed by an off-line method. The swelling hydrogel microneedles (MNs) were prepared to extract skin ISF. DA in skin ISF was recovered and detected by laccase-like DNAzyme@MOF. This study realized the minimally invasive detection of DA. The proposed detection method of biomarkers in ISF based on DNAzyme@MOF would provide a new dimension towards the future development for the detection of other biomarkers in ISF.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Ziyi Wang,Changyan Guo,Kefu Wang,Jiang Li,Jide Wang
Upgrading waste PET to prepare metal–organic frameworks (MOF) through chemical recycling provides new ideas and methods for PET recycling treatment and high value-added conversion. In this paper, Cobalt-based metal–organic frameworks (Co-MOF) were prepared from PET by one-pot solvothermal method without adding acids or bases. The prepared Co-MOF was used as a heterogeneous catalyst to catalyze the selective oxidation of ethylbenzene (EB) for the preparation of acetophenone (AP). When only tert-butyl hydroperoxide (TBHP) was used as the oxidizing agent without any additional solvents, 89% EB conversion and 94% AP selectivity were achieved, respectively. Moreover, the catalyst showed excellent stability with no significant deactivation under 5 cycles. In addition, the synthesized Co-MOF-10 also exhibits impressive conversion rates of 96% and 93% in benzyl alcohol and styrene oxidation, respectively. Compared with the Co-MOF prepared by commercial terephthalic acid (BDC), the Co-MOF-10 synthesized via the one-pot method using PET exhibits enhanced cost-effectiveness, environmental sustainability, and superior catalytic performance. The present study establishes a foundation for the conversion of plastic PET into valuable MOF and its subsequent application in C–H bond oxidation.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Wenjin Ni,Sicheng Zhang,Lingling Cheng,Tiejun Luo,Hongyun Yang,Tengfei Duan,Dejian Yan
Developing efficient photoanodes for water oxidation is highly promising due to their critical role in producing green H 2 and harnessing solar energy. Herein, a metal-organic framework (MOF)/photoanode was successfully constructed by coating TiO 2 nanorods with MIL-88(Fe) MOF for photoelectrochemical (PEC) water splitting. The results demonstrated that MIL-88(Fe) was uniformly and tightly coated on TiO 2 and functioned as a cocatalyst. The MIL-88(Fe) MOF provides a large surface area and more Fe-O active sites, contributing to high PEC activity by reducing electron/hole recombination and enhancing light response capability. Moreover, the photoanode also exhibited an improved charge conductivity. As a result, the MIL-88(Fe)/TiO 2 photoanode exhibited an excellent photocurrent density of 1.06 mA cm −2 at 1.23 V RHE , which is approximately 2.6 times higher than the pristine TiO 2 . Charge transfer kinetics analyses and electrochemical tests were carried out and revealed that the improved PEC performance was attributed to the introduction of MIL-88(Fe), which promoted charge separation-transfer. This research provided new insights into the design of efficient semiconductor/MOF composite photoanodes for PEC water oxidation.
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