Chemical Engineering and Processing-Process Intensification
·
2024
·
IF 3.8
Xiaocui Zhang,Xiaoxin Wang,Jun Gao,Jiangcheng Li,Xiangfeng Liang,Qinghui Shou
The global need for bromide ions (Br - ) has driven the research focus to extract them from various liquid ores. Highly efficient and selective adsorbent is still lacking. MOF with large surface area and structural stability are promising candidate for Br - extraction. In this work, we prepared Cu-MOF-74 nanocrystals. Abundant hydroxyl groups on them spontaneously reduced Ag + to Ag 0 nanoparticles, resulting in the fabrication of Ag 0 doped Cu-MOF-74. The crystalline structure retains after the doping of Ag 0 when the mass ratio of silver nitrate to MOF is <0.5. The crystals are distorted or even damaged when the ratio is higher than 1.0 according to XRD and DFT calculation. The adsorption capacity of Ag 3 -Cu-MOF-74 is 232.92 mg g -1 , surpassing the capacities of most previously documented adsorbents. The desorption of Br - and thereafter the recovery of adsorbent could be realized through light driven decomposition of AgBr. This MOF adsorbent shows promising application potential in Br - recovery from various liquid ores.
✓ 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
Guanhua Zhang,Shaocong Mo,Xiaowei Liao,Feng Liu,Hongtao Xu,Wei Lu
Metal-organic frameworks (MOFs) are interesting materials for carbon dioxide (CO 2 ) adsorption. Herein, novel nanocomposite materials comprising activated carbon (AC) and Magnesium-MOF-74 were synthesized by impregnating different loading ratios of activated carbon into synthesized Magnesium-MOF-74 to yield Magnesium-MOF-74@AC-X (where X represents the Magnesium/AC ratio set to 1:2, 1:1, and 2:1). Compared to Magnesium-MOF-74 alone, Magnesium-MOF-74@AC-X exhibited higher specific surface area, superior thermal stability, elevated CO2 adsorption capacity, and better adsorption selectivity. At 273 K, the adsorption of CO 2 by Magnesium-MOF-74@AC sample containing Magnesium to AC ratio of 1:2 reached 40.31 cm 3 /g, while that of pristine Magnesium-MOF-74 was only 21.01 cm 3 /g. At 298 K, the adsorption capacity reached 29.45 cm 3 /g, while that of pristine Magnesium-MOF-74 was 1.91-fold lower. The linear fitting of the adsorption isotherms of composite in the Henry adsorption region using Henry’s law yielded a CO 2 /N 2 selectivity adsorption capacity of 32.19, a value 4.55-fold higher than pristine Magnesium-MOF-74.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Yuan Zhou,Jin-Long Jiang,Xia-Ping Zhu,Wen Chen
In this study, attapulgite (ATP) was modified by Zr-based metal organic framework (UiO-66-NH 2 ) and poly(hexamethylenediamine-tannic acid) (HTA), an amino material named UiO-66-NH 2 /HTA/ATP (UHA) was prepared to efficiently remove Cr(VI). The morphology and structure of UHA were analyzed through various characterization methods. The conditions and influencing factors of UHA preparation and Cr(VI) adsorption were studied. The material had a maximum adsorption capacity of 270.3 mg/g for Cr(VI) when pH was 2.0, temperature was 298 K, adsorption time was 300 min, and ionic strength was 0.01 mol/L, which was obtained by the Langmuir fitting model. The adsorption process conforms to the pseudo-second-order kinetic and Langmuir isothermal models, indicating that the adsorption process is mainly based on the chemical adsorption of monolayers. X-ray photoelectron spectroscopy analysis shows that UHA mainly removes Cr(VI) by hydrogen bonding , electrostatic attraction, reduction, and complexation. Thermodynamic investigation suggested a disordered, endothermic and spontaneous adsorption process. After UHA treatment, the simulated wastewater containing Cr(VI) met the discharge standard, and the results of cycling experiments showed that UHA has good renewable performance and offers potential prospects for Cr(VI) removal in water.
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Nanomedicine
·
2024
·
IF 6.6
Yan Yang,Yiling Wang,Xinran Jiang,Jiahao Mi,Dizhang Ge,Yuna Tong,Yuxuan Zhu
Introduction Alzheimer’s disease (AD), a neurodegenerative condition, stands as the most prevalent form of dementia. Its complex pathological mechanisms and the formidable blood-brain barrier (BBB) pose significant challenges to current treatment approaches. Oxidative stress is recognized as a central factor in AD, underscoring the importance of antioxidative strategies in its treatment. In this study, we developed a novel brain-targeted nanoparticle, Ce/Zr-MOF@Cur-Lf, for AD therapy.Methods Layer-by-layer self-assembly technology was used to prepare Ce/Zr-MOF@Cur-Lf. In addition, the effect on the intracellular reactive oxygen species level, the uptake effect by PC12 and bEnd.3 cells and the in vitro BBB permeation effect were investigated. Finally, the mouse AD model was established by intrahippocampal injection of Aβ1-42, and the in vivo biodistribution, AD therapeutic effect and biosafety of the nanoparticles were researched at the animal level.Results As anticipated, Ce/Zr-MOF@Cur-Lf demonstrated efficient BBB penetration and uptake by PC12 cells, leading to attenuation of H2O2-induced oxidative damage. Moreover, intravenous administration of Ce/Zr-MOF@Cur-Lf resulted in rapid brain access and improvement of various pathological features of AD, including neuronal damage, amyloid-β deposition, dysregulated central cholinergic system, oxidative stress, and neuroinflammation.Conclusion Overall, Ce/Zr-MOF@Cur-Lf represents a promising approach for precise brain targeting and multi-target mechanisms in AD therapy, potentially serving as a viable option for future clinical treatment.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2024
·
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.
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
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.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
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.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 6
·1-14
·
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
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
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.
✓ 已验证
产品关联
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jianwei Yuan,Chengcheng Zhou,Jiawei Zheng,Qianqian Jia,Zhenggang Wang,Haipeng Zhu,Guozhen Liu,Yanan Guo,Zhenwei Zhang,Shuping Zhang,Pin Zhou,Gongping Liu,Wanqin Jin
The membrane-based pervaporation process presents substantial promise for the challenging separation of azeotropic mixtures. However, the efficiency of conventional polymeric membranes in achieving this remains suboptimal. To tackle this issue, there has been notable attention directed towards the amalgamation of metal–organic frameworks (MOFs) with polymer matrices, giving rise to the creation of mixed matrix membranes (MMMs). In this study, for the first time, we integrated MOF-303 crystals into a chitosan (CS) matrix, thereby pioneering the development of MOF-303/CS MMMs designed for the separation of azeotropic mixtures of methanol/methyl tert -butyl ether (MTBE). By employing the spin-coating method, a thin and defect-free MOF-303/CS membrane layer was effectively deposited onto a porous substrate. The morphology and physiochemical attributes of the synthesized MOF-303 crystals and the subsequent MOF-303/CS MMMs were analyzed using techniques such as SEM, XRD, TGS, and FTIR. The separation data revealed a marked enhancement in flux and methanol permeance upon the introduction of MOF-303 crystals into the CS membrane, whereas the increase in MTBE flux and permeance was relatively few, resulting in an augmented methanol/MTBE separation factor and selectivity. The optimized MOF-303/CS MMM demonstrated outstanding and enduring separation efficacy, demonstrating a total flux of 173 g/m 2 ·h and a methanol/MTBE separation factor of 209 at 40 °C for 10 wt% methanol-MTBE mixtures. Notably, this performance surpassed that of the pure CS membrane by nearly 1.6 times in total flux and 3.68 times in separation factor, respectively, underscoring its substantial potential in the efficient separation of azeotropic mixtures.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zhou Qu,Yanni Liu,Haoran Wang,Qianxi Yang,Hongwei Fan,Hong Meng
Hetero-structured nanocomposite membranes have great potential in advanced gas separation due to the synergy of hierarchical pores. Herein, we report a MOF (metal–organic framework)-in-COF (covalent organic framework) layer supported on a polyacrylonitrile (PAN) ultrafiltration substrate prepared by a contra-diffusion reaction of MOF inside a one-dimensional (1D) pore-channels of COF layer. Such 1D confinement-induced membrane features a unique ultramicropore-in-nanopore structure, which intensifies the molecular sieving while preserving high-speed transfer pathways. The prepared ZIF-67-in-TAPB-BPDA-PAN membrane exhibited an excellent helium (He) permeance of ∼1500 GPU together with an enhanced separation selectivities of 3.89 for He/N 2 and 5.38 for He/CH 4 , respectively. The overall performance is competitive among the reported He-selective membranes. A continuous gas permeation test for 100 h indicates good stability. This work would bring insights into the engineering and preparation of nanocomposite functional materials applied in various separation fields.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）