COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Zhongmin Feng,Jingwen Yang,Liangyuan Zhu,Ting Sun
Fe–based metal–organic frameworks (Fe–MOFs) have been widely used in heterogeneous Fenton-like processes. However, the catalytic performance of Fe-MOFs is limited by the relatively slow Fe (III)/Fe (II) redox cycle. For Fe-MOFs, increasing the interfacial electron transfer and reducing the electron density of Fe-MOFs are expected to accelerate the reduction of Fe (III) and improve the catalytic performance. Here, by mixing Fe/Cu metal species and introducing bromine groups, we successfully prepared bromine-functionalized bimetallic MOFs–FeCu(BDC-Br), and we used it to effectively degrade phenol in a Fenton-like process. Compared with most other catalysts, FeCu(BDC-Br) achieved a higher phenol degradation kinetic rate of 0.106 min –1 at a low dose. Effects of pH, humic acid (HA) and coexisting ions on the degradation of phenol were examined. The FeCu(BDC-Br) /H 2 O 2 system can remove phenol in the near neutral pH range of 4–6 and 0–50 mg/L HA range. Chloride ion , sulfate, or phosphate with a concentration of 100 mg/L showed an inhibitory effect on the catalytical performance of phenol degradation. This work provides insights for the preparation of Fe-MOFs Fenton-like catalyst in water/wastewater treatment.
研究领域:
环境科学
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催化材料
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Yi Han,Mingjie Huang,Wei Xiang,Chen Wang,Yongjie Li,Xiaohui Wu,Juan Mao,Tao Zhou,Hong Li,Deming Wu
Fe-based metal–organic frameworks (MOFs) are popular in activating oxidants e.g·H 2 O 2 and persulfate (PS) for degrading recalcitrant organic substances, generally regarded with a simple interfacial efficient iron cycle. This study has revealed that a novel two-steps single-electron transfer mechanism would occur initially to activate the rapid degradation 4-chlorophenol (4-CP) in the MIL-88B(Fe)/H 2 O 2 system (88B/H 2 O 2 system). The degradation of 4-CP was acidic favorable (pH 0 ≤ 6.0) and could be divided into two reaction stages, i.e., initial lag phase (0–10 min) and following rapid decay phase (10–50 min). In the first stage, H 2 O 2 was slowly activated on the surface of 88B to form superoxide radical (O 2 •– ), which would lead to the accumulation of the key intermediate hydroquinone (HQ) through reducing 4-CP. Afterwards, HQ could reductively dissolve iron ions which would lead to the subsequent efficient homogeneous Fenton reaction for the rapid oxidation of 4-CP by hydroxyl radical (•OH) in the following rapid decay phase. It was interesting to note that specific aromatic compounds, which would form reductive benzenediols intermediates by O 2 •– , could be efficiently degraded in the 88B/H 2 O 2 system. The result of this study is expected to provide a new insight for understanding the catalytic oxidation process based on MOFs, and its application if possible.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Yang Wang,Mingzhen Zhao,Chen Hou,Wenqiang Chen,Shuaishuai Li,RongKai Ren,Zhijian Li
A solar photo-electro-Fenton like (SPEF) system constructed by MOFs/carbon nanofibers composite membrane (MOFs/CNF) was proposed for the efficient degradation of perfluorooctanic acid (PFOA). The bifunctional catalytic cathode, MOFs/CNF, was fabricated by solvothermal growth of Fe/Co bi-metal MOFs on CNF which synthesized from carbonization of electrospun PAN fibers, and exhibited both extraordinary photo-catalytic and electro-catalytic abilities. During the degradation, H 2 O 2 was continuously generated on-site through the 2-electron pathway of ORR, and further be quickly photo-catalyzed to produce •OH on MOFs/CNF. Moreover, PFOA was not only be degraded effectively and rapidly (degradation efficiency of 99% in 120 min), but also highly mineralized as revealed by the total organic carbon removal efficiency reaching 91% in 120 min. The possible mechanism for PFOA mineralization was proposed on the basis of the intermediate analysis and illustrated by the valence state change of Co and Fe on MOFs, as determined through XPS before and after degradation. The EPR analysis of •OH with or without solar light radiation further confirmed the enhanced solar photo-electro-catalysis compared to common electro-Fenton process.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Xinbo Zhao,Huali Li,Weige Chen,Weijie Li,Zhiyu Han,Weihua Li
Conventional electromagnetic wave (EMW) absorbing materials often suffer from poor stability in humid and corrosive environments, limiting their real-world applications. In this work, carbon-based composites derived from Ti-Ni bimetallic metal-organic frameworks (MOFs) were synthesized via pyrolysis and investigated as dual-function materials for EMW absorption and corrosion protection. The composites exhibit excellent impedance matching and strong attenuation capability due to the synergistic interaction between the metal oxides and the carbon matrix. A minimum reflection loss of −40 dB and an effective absorption bandwidth of 4.61 GHz were achieved at an optimized thickness of 4.1 mm. Furthermore, upon incorporation into an epoxy resin coating, the composite displayed outstanding corrosion resistance. After immersion in a 3.5 wt% NaCl solution for 7 days, good stability was still maintained. This study presents a promising strategy for designing multifunctional materials with integrated EMW absorption and corrosion resistance, offering broad application potential in marine, aerospace, and communication sectors.
研究领域:
材料科学
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电磁学
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腐蚀工程
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Tian Lan,Yue Chang,Jiaran Song,Lingxin Meng,Pengyun Zhao,Jinxuan Lei,Jingmei Xu
In this paper, amino monomer (4Am-PH) and the sulfonated poly (arylene ether ketone sulfone) involving amino groups (Am-SPAEKS) were successfully prepared by diazotization reaction and direct polycondensation, respectively. The polyethyleneimine-modified UiO-66-NH 2 (P-MOFs) were prepared as fillers. Composite membranes were fabricated by incorporating different contents of P-MOFs into Am-SPAEKS polymer matrix using non-solvent-induced phase separation. The morphology, chemical structure and properties of the polymers, fillers and composite membranes were proved by FT-IR, 1 H NMR, FE-SEM, XPS and etc. The final experimental results showed that the introduction of hydrophilic fillers, P-MOFs, substantially improved the hydrophilicity, water flux and antifouling capabilities of the membranes. The water contact angle decreased from 78.5° to 56.4°. The flux of water from a pure membrane was 333.68 L/m 2 h. When the content of P-MOFs was 0.1 %, the water flux could attain to 830.23 L/m 2 h, the retention rate of bovine serum albumin (BSA) solution could attain to 98.6 % and the flux recovery rate (FRR) values of the composite membrane remained high (86.1 %) for BSA solution. In addition, after three cycles, the pure water flux of the composite membrane could still attain 595.49 L/m 2 h. The results demonstrated that P-MOFs have significant potential for utilization in the preparation of composite ultrafiltration membranes and provided an effective idea for the modification and design of other hydrophilic MOFs applied in the study area of ultrafiltration membranes.
研究领域:
材料科学
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环境工程
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膜技术
✓ 已验证
产品关联
DOI
高影响因子
Heliyon
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2024
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IF 3.4
Aftab Khan,Samreen Sadiq,Iltaf Khan,Muhammad Humayun,Guo Jiyuan,Muhammad Usman,Abbas Khan,Shoaib Khan,Amal Faleh Alanazi,Mohamed Bououdina
Modern industries rapid expansion has heightened energy needs and accelerated fossil fuel depletion, contributing to global warming. Additionally, organic pollutants present substantial risks to aquatic ecosystems due to their stability, insolubility, and non-biodegradability. Scientists are currently researching high-performance materials to address these issues. LaFeO 3 nanosheets (LFO-NS) were synthesized in this study using a solvothermal method with polyvinylpyrrolidone (PVP) as a soft template. The LFO-NS demonstrate superior performance, large surface area and charge separation than that of LaFeO 3 nanoparticles (LFO-NP). The LFO-NS performance is further upgraded by incorporating ZIF-67. Our results confirmed the ZIF-67/LFO-NS nanocomposite have superior performances than pure LFO-NP and ZIF-67. The integration of ZIF-67 has enhanced the charge separation and promote the surface area of LFO-NSwhich was confirmed by various characterization techniques including TEM, HRTEM, DRS, EDX, XRD, FS, XPS, FT-IR, BET, PL, and RAMAN. The 5ZIF-67/LFO-NS sample showed significant activities for CO 2 conversion, malachite green degradation, and antibiotics (cefazolin, oxacillin, and vancomycin) degradation. Furthermore, stability tests have confirmed that our optimal sample very active and stable. Furthermore, based on scavenger experiments and the photocatalytic degradation pathways, it has been established that H + and •O 2 − are vital in the decomposition of MG and antibiotics. Our research work will open new gateways to prepare MOFs-Perovskites nanocatalysts for exceptional CO 2 conversion, organic pollutants and antibiotics degradation.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2024
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IF 4.1
Yongming Zhu,Hong Sun,Tianyu Zhang,Qiang Li,Zhichao Xue,Mingfu Yu,Jie Li,Xue Wang
Rechargeable lithium-oxygen batteries (LOBs) are acknowledged as potential candidates for advanced energy storage devices as a result of their considerable theoretical energy densities . Nevertheless, they encounter significant challenges throughout discharging and recharging phases, including the difficult decomposition of Li 2 O 2 products, sluggish reaction kinetics, and limited cycle stability. In this study, an efficient catalyst was synthesized by in situ growth of metal–organic frameworks (MOFs)-derived cobalt manganese layered double hydroxide (CoMn-LDH) array on Ti 3 C 2 T x MXene nanosheets (CoMn-LDH@Ti 3 C 2 T x ). The LOBs with CoMn-LDH@Ti 3 C 2 T x cathode demonstrated high discharge specific capacity of 27.61 Ah g −1 at 100 mA g −1 and an extended cycle stability of over 224 cycles at 500 mA g −1 . Density functional theory (DFT) computations showed that CoMn-LDH@Ti 3 C 2 T x facilitates electron redistribution, optimising the adsorption energy of intermediates, thereby lowering the energy barriers for oxygen reduction reactions (ORR) and oxygen evolution reactions (OER). Consequently, this work presents a multi-level nanostructured catalyst preparation strategy derived from MOFs, offering new insights for the fabrication of efficient electrocatalytic materials.
研究领域:
材料科学
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能源存储与转换
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电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Elia Gadallah,Mohamed N. Khalil,Sami Karam,Wael Ali,Jinchao Chen,Xiangmin Xu,Yuan Jing,Fang Li
Designing and fabricating ultrafiltration membranes that possess relatively high permeability while simultaneously maintaining high rejection and improved antifouling properties continues to be a challenge. In this study, we investigated the integration of novel melamine modified Zr-based metal organic frameworks (Zr-MOFs) with nanosheets of graphene oxide (GO) and sulfonated graphene oxide (SGO). These composite materials were synthesized using the solvothermal process and subsequently coated onto the PES membrane surface using the vacuum-assisted dip-coating method. The stability enhancement of the topmost MOF composite layer adhering to the membrane surface is attributed to hydrogen bonding, π-π stacking, and van der Waals interactions. These effects are augmented by the incorporation of polar functional groups such as hydroxyl, carboxyl, sulfonate, and amine groups. The optimized composite membranes incorporating MOFs exhibit enhanced performance, with a permeability of 80.2 L/m 2 h bar, achieving a bovine serum albumin (BSA) rejection of ≥97.8 % and a humic acid (HA) rejection of 98.9 %. Moreover, a flux recovery ratio (FRR) of 89.5 %. To investigate the interactions among the incorporated components, molecular dynamics (MD) simulations were employed in a computational study. The simulations validated hydrogen bond formation and reinforced prior studies, demonstrating the potential of Zr-MOF compositions as effective hydrophilic nanoparticles. The overall results indicate a substantial enhancement in membrane performance and underscore the high potential for practical applications.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2025
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IF 6.7
Yifeng Wang,Yongxuan Xiang,Jiapeng Wang,Hua-Bin Yuan,Guoqiang Chen,Ping Yao,Tieling Xing
Phosphates and dyes are two common pollutants in wastewater, yet research on their simultaneous removal remains limited. In this study, defective Ce X Zr 1 -1,3,5-Benzenetricarboxylic acid (BTC) were synthesized via a metal doping strategy, where x denotes the molar ratio of Ce to Zr. Defective MOFs were synthesized using water and acetic acid (HAc) as the solvent and modulator, respectively, replacing N , N -dimethylformamide (DMF) and formic acid (FA) in the traditional synthesis method. The number of missing linkers was quantified using thermogravimetry analysis and potentiometric acid-base titration. The successful synthesis of Ce X Zr 1 -BTC was confirmed by powder X-ray diffraction (PXRD), and X-ray photoelectron spectroscopy (XPS). Ce 0.75 Zr 1 -BTC showed a great phosphate adsorption performance (234.7 mg/g) under optimized conditions, with a dosage of 0.2 g/L, an initial phosphate concentration of 200 ppm, pH 2, and a temperature of 303 K. Additionally, benefiting from more adsorption sites and reduced internal diffusion limitations, it retained more than 95 % phosphate removal efficiency after four consecutive applications and was able to treat 392 bed volumes of phosphate solution. Furthermore, Ce 0.75 Zr 1 -BTC could selectively adsorb anionic dyes in mixed dyes solution, and the adsorption mechanisms mainly involve electrostatic attraction, π-π stacking, and hydrogen bonding. It reduced phosphate concentrations to 1.17 μg/L and significantly lowered the COD of simulated phosphate-containing dye wastewater, demonstrating its potential for practical wastewater treatment applications.
研究领域:
环境科学
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材料化学
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吸附技术
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废水处理
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金属有机框架材料（MOFs）
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Xiu-Zhi Wei,Fentahun Wondu Dagnaw,Jianguo Liu,Longlong Ma
Carboxylic acid is one of the most crucial and widely used organic chemicals in daily human life activities. Hence preparation of this important chemical was performed under the application of the highly selective photo-catalysts through oxidation of alcohols to carboxylic acids. Herein, we have designed and disclosed a binary NH 2 -MIL-125(Ti)/ NaBr) catalyst system to realize the effective transformation of alcohols into carboxylic acids under visible light irradiation . Hence, derivatives of benzyl alcohol containing either electron withdrawing and donating groups as well as aliphatic primary alcohols were effectively converted into the corresponding carboxylic acids. Based on our findings, NH 2 -MIL-125(Ti) based photocatalytic system has shown efficient and highly selective activities for oxidation of alcohol especially the in-situ conversion of co-catalyst NaBr into the corresponding free radical can enhance the alcohol oxidation performance of the catalytic system.
研究领域:
化学
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催化
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材料科学
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光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Talanta Open
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2024
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IF 4.1
Wen-Xuan Jia,Ming-Ming Tao,Xin-Yu Wang,Yan-Feng Huang,Ying Li
To address the limitations of natural enzymes, more and more artificial enzymes have been developed. As the most appropriate candidate, metal organic frameworks (MOFs) and MOFs-based derivatives have generated extensive interest due to their remarkable properties and potential applications in enzymes mimicry. In this work, Ce/Cu mixed metal oxides-carbon composite (CeCuO x /C) was synthesized through a simple oxidation method with bimetallic MOFs CeCu-BTC as precursors. It was found that the prepared CeCuO x /C possess four different enzyme-like activities, including peroxidase, oxidase, laccase and phosphatase mimetic activities. The kinetics parameters and potential influence factors of enzyme-like activities were studied and CeCuO x /C exhibited high catalytic activity, excellent stability, and reusability. Additionally, a cysteine detecting method was established via oxidase-like activity of CeCuO x /C. The linear response to the cysteine was in the range of 50 to 900 μM, and the limit of detection was 3.24 μM. The spiking recoveries were in the range 93.5–100.2 % for cysteine in artificial human urine samples and the relative standard deviations were found within the ranges of 1.2–2.9 %. This work presents a new approach for the design of multi-enzyme mimics and develops the potential of CeCuO x /C for biological sensing.
研究领域:
生物化学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
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2019
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IF 5.108
Shi-Wen Lv,Jing-Min Liu,Chun-Yang Li,Ning Zhao,Zhi-Hao Wang,Shuo Wang
Nowadays, the visible-light-driven photocatalysis via advanced photocatalyst for PS activation have promising applications in wastewater treatment . Herein, for the first time, two novel MOFs@COFs hybrid materials (denoted as MIL-101-NH 2 @TpMA and UiO-66-NH 2 @TpMA) with nitrogen-rich building blocks were fabricated via a feasible step-by-step assembly method, and then employed as efficient photocatalytic platform coupling with sulfate radical-based advanced oxidation processes for the degradation of BPA under visible light irradiation. Detailed analyses revealed that the hybridization of MOFs and COFs could greatly boost visible light absorption , while the heterojunction formed at the interface could effectively facilitate the separation and transfer of photogenerated electron-hole pairs. More importantly, the developed solar/MOFs@COFs/PS system exhibited the excellent degradation ability toward BPA, and an incredible degradation efficiency of 99% was eventually achieved. Possible mechanism for photocatalytic degradation of BPA was also proposed. Furthermore, the prepared composites with great reusability and stability possessed a broad potential for highly effective degradation of various organic contaminants . In short, this work not only demonstrated the combination of MOFs and COFs with C 3 N 4 active unit was a feasible strategy for improving photocatalytic activities in the degradation of organic contaminants, but also provided some novel inspirations for constructing high-efficient photocatalysts with heterostructure.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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