SYNTHETIC METALS
·
2021
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IF 3.266
Ruixue Wu,Caifeng Bi,Lulu Wang,Jinmiao Wang,Chuanbin Fan,Nana Li,Mei Wang,Feng Shao,Guobo Chen,Yuhua Fan
In this work, five novel Cd/Zn-based MOFs with different topological framework, namely {[Cd(bimb)(Hbipa)]·H 2 O} n (1), {[Cd 3 (dimb) 3 (bipa) 2 (H 2 O) 2 ]·2H 2 O} n (2) , [Cd(bimd)(Hbipa)(H 2 O)] n (3) , {[Zn(bipd)(Hbipa)]·H 2 O} n (4) and [Zn(bimb)(Hbipa)] n (5) had been synthesized and characterized. Worth noting, Complex 1 and 2 had effective separation behaviors towards MO and MBE dyes respectively, which could reach the adsorption equilibrium within a quite short time even if there existed another kind of dye in the system. Meanwhile, Complex 3 – 5 showed great performance in CR adsorption. Additionally, Complex 3 – 5 also showed excellent photocatalytic degradation capabilities toward MB and MV dyes under UV irradiation. According to the study, these five metal-organic frameworks can be used as a kind of functional materials in the adsorption and photocatalytic degradation of organic dyes in wastewater.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2023
·Vol. 332
·期 10
·4167-4177
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IF 1.6
Peng Yinyin,Pan Ting,Chen Chuang,Zhou Mi,Liu Derong,Feng Jian,Xiong Wei,Liu Ning,Yuan Guoyuan
In this work, MOFs materials functionalized (HC-MOFs) with heterocyclic ligands (thiophene-TPC, pyrrole-PCA and furfural-FUR) were prepared by a one-step method and used for cobalt ion separation studies. The results showed that the maximum adsorption of cobalt ions by the three adsorbents was 141.0 mg/g (UiO-66-TPC), 146.0 mg/g (UiO-66-PCA), and 150.6 mg/g (UiO-66-FUR), respectively, at pH 8.3 and a temperature of 298 K. In addition, The HC-MOFs showed good stability under different doses (0 ~ 200 kGy) of γ-ray irradiation and have great potential for application in the separation of practical radioactive wastewater containing 60 Co.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2020
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IF 6.513
Nannan Geng,Wei Chen,Hang Xu,Mingmei Ding,Tao Lin,Qiangshun Wu,Lei Zhang
In this work, as a new strategy, ultrasound/H 2 O 2 /MOF system was firstly applied by environmental-benign Fe-MOFs (MIL-53, MIL-88B and MIL-101) for tetracycline hydrochloride removal. The synthetic Fe-MOFs were characterized by XRD, FTIR, SEM, XPS, N 2 sorption-desorption isotherms and CO-FTIR. MIL-88B demonstrated the best catalytic performance because of its highest amount of Lewis acid sites. Influencing factors, contrast experiment, and corresponding dynamics were carried out to obtain the best experimental conditions and reaction system. Under optimal conditions ([Tetracycline hydrochloride] = 10 mg/L, [MIL-88B] = 0.3 g/L, [H 2 O 2 ] = 44 mM, [ultrasound power] = 60 W, and pH = 5.0), the-first-order kinetic rate constant k was calculated to be 0.226 min −1 , higher than the simple combination of the ultrasound system (0.004) and MIL-88B/H 2 O 2 system (0.163), indicating the importance of synergistic effect between ultrasound and Fenton reaction. EPR test and quenching experiment proved that ·OH is mainly responsible for tetracycline hydrochloride removal. The major reaction path is the adsorption and decomposition of H 2 O 2 by coordinative unsaturated iron sites on Fe-MOF, but it is not the only path. The direct decomposition of H 2 O 2 and the cavitation effect caused by ultrasound also contribute to the generation of OH.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
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IF 5.7
Yichen Liu,Yaqi Liu,Guicheng Luo,Zuozheng Xu,Xuhao Sun,Yuan Zhu,Shuyi Wu,Lizhe Liu,Yun Shan
To efficiently control oxygen evolution reaction (OER) at electrocatalysts holds enormous promise for large-scale production of clean energy, but faces the scarcity of practical regulation strategies due to underexplored catalytic mechanism. Herein, a facile and feasible strategy is developed involving metal-metal super-exchange interaction to manipulate the electronic state configuration of catalysts, and the as-synthesized Ni-doped Co-1,3,5-benzenetricarboxylic acid Metal-Organic Frameworks (MOFs) only require an overpotential as low as 260 mV to reach a large current of 200 mA cm −2 , which is much lower than 400 mV for the commercial RuO 2 catalyst. The introduced Ni atoms lead to more broadly occupied states and d-band center close to the Fermi energy level for the spin-polarization of the electrons in Co atoms, thus decreasing the orbital occupancy to facilitate the adsorption/desorption of the reaction intermediates and lowering the rate-determining step barrier to accelerate OER. Our findings have an important paradigm role in the design of electrocatalysts with high performance for oxygen evolution reaction.
研究领域:
电化学
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催化
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材料科学
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能源存储与转换
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2019
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IF 14.229
Shiyu Zhang,Meng Du,Zipeng Xing,Zhenzi Li,Kai Pan,Wei Zhou
Defective-rich and electron-rich mesoporous NH 2 -MIL-125(Ti)@ZnIn 2 S 4 /CdS hierarchical tandem heterojunctions were fabricated through two-step solvothermal and one-step hydrothermal strategies. The interface with electron enrichment can cause active interface reaction, fast transfer and separation of charge carriers and restrain the photocorrosion of CdS. ZnIn 2 S 4 , as a bridge to connect Ti-MOFs and CdS, favors the separation of charge carriers and forms tandem heterojunctions. The as-prepared photocatalyst has a relative large surface area of ∼877.0 m 2 g −1 and a narrow band gap of ∼1.84 eV, which could absorb visible light efficiently. Furthermore, it exhibits a high photocatalytic hydrogen generation rate which was increased to 2.367 mmol g −1 h −1 and the high photocatalytic degradation efficiency for 2,6-dichlorophen and 2,4,5-trichlorophenol which were 98.6% and 97.5%, respectively. Additionally, recycling text for several cycles indicates the high stability. This novel Ti-MOFs based core@shell hierarchical tandem heterojunctions may offer a new insight for fabricating high-performance heterojunctions for multi-channel charges transfer.
研究领域:
材料科学
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环境科学
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产品关联
DOI
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.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Ying Zhou,Donghui Wang,Dingnan Wang,Yang Wang,Yang Li,Jie Li,Yiming Zhang
Mimetic recognition materials for rapid and selective analysis of foodborne contamination from complex foodstuff becomes a hot research topic in the field of food safety. In this work, borate-affinity-functionalized MOF/molecularly imprinted polymer paper-based microfluidic chips (FSU-BA@MIP) were prepared by growing functionalized MOFs on paper surface with 3-carboxyphenylboronic acid (3-CPBA) as the ligands, followed by coating of a MIP layer of salbutamol (SAL) through a borate-affinity surface imprinting strategy. Using the obtained paper-based chip as a mimetic recognition and specific enrichment module, the fluorescence sensing platform achieved visual rapid quantitative analysis of SAL with a linear range of 0.1 × 10 −2 –5.0 mg L −1 . The limits of detection and quantification were calculated to be 0.095 and 0.290 μg kg −1 , respectively, and the sample loading via lateral flow aid could be completed within 30 min. The obtained MOFs/MIPs paper chips provide an effective way for the rapid analysis of harmful contaminants from different animal-derived foods.
研究领域:
食品安全
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分析化学
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产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2025
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IF 4.2
Xianbing Zhang,Yuheng Liu,Jiajia Yuan
Metal-organic frameworks (MOFs) are recognized as important Fenton-like materials for environmental remediation. However, their applications are often hindered by slow cycling between Fe (III) and Fe (II). This study aimed to address the slow Fe (III)/Fe (II) cycling limitation of Fe-MOFs through dual modification strategy: bimetallic modification and amino functionalization. A series of NH2-MOF(Fe, Co) catalysts with varying Fe/Co ratios were synthesized via a hydrothermal method and evaluated for sulfamethoxazole (SMX) degradation. The optimized NH2-MOF(Fe, Co) catalyst (Fe/Co ratio = 7:3) exhibited substantially enhanced catalytic performance, with SMX removal rate and rate constant in the H2O2 system being 3.2 and 43.5 times higher than those of the Fe-MOF/H2O2 system, respectively. The catalyst demonstrated robust performance across a wide pH range (3.05–7.00), addressing a common limitation of Fenton-like systems. Physicochemical characterization revealed that the enhanced performance was attributed to two key factors: the synergistic effect between Co and Fe in the bimetallic active center, and improved electron transfer to the central metal due to -NH2 functionalization. These modifications effectively addressed the Fe (III)/Fe (II) redox cycling limitation. The proposed reaction mechanism provides insights into SMX degradation pathways in the NH2-MOF(Fe, Co)/H2O2 system. This study presents an efficient and stable MOF-based Fenton-like catalyst with potential applications in wastewater treatment and environmental remediation.
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
INORGANIC CHEMISTRY COMMUNICATIONS
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2024
·
IF 4.4
Jie Wang,Ya-Nan Yu,Rou Huang,Ce Wang,Zheng Yin
Mix-ligands strategy is highly efficient for the rational construction of MOFs with particular structure motifs and high porosity, yet challenging and requiring matching in hierarchical coordination assembly and synergetic crystallization. The solvothermal reactions of 1,3,5-tris[4-carboxyphenyl]benzene (H 3 btb) and 1,4-benzenedicarboxylic acid (H 2 bdc) with different 3d metal ions , generated highly porous mixed-ligands MOFs of [(CH 3 ) 2 NH 2 ] 2 [Mn 3 (btb) 2 (bdc)]·12DMF·3MeOH ( Mn-btb-bdc ) having anionic 3D frameworks constructed from linear [Mn 3 (COO) 8 ] nodes, [Co 4 (btb) 2 (bdc)(H 2 O) 3 ]·15DMF·7H 2 O ( Co-btb-bdc ) processing neutral frameworks constituted by linear [Co 3 (COO) 6 (H 2 O) 4 ] and paddle-wheel [Co 2 (COO) 4 (H 2 O) 2 ] nodes, as well as one single-ligand MOFs of [(CH 3 ) 2 NH 2 ][Cd(btb)(H 2 O)]·8DMF ( Cd-btb-2fold ) exhibiting 2-fold interpenetrated ths net frameworks due to the unsuccessful introduce of the coexisted bdc ligand. Two new topology net of 2,3,8-connected net with point symbol of (4 2 ·6) 2 (4 4 ·6 6 ·8 12 ·10 5 ·12)(6) and 2,3,4,6-connected net with Point Symbol of (4·8 2 ) 4 (4 2 ·8 11 ·10 2 ) 2 (8 4 ·12 2 )(8 2 ) were found for Mn-btb-bdc and Co-btb-bdc . All these three MOFs are highly porous with void fractions of 60.9%, 52.2% and 61.4%, stemming from 3D-penetrated, 3D-penetrated and 1D channels, respectively. Such structural differentiations are attributed to the diversified electronic structure and coordination preference of different 3d metal ions, as well as the solvent template and temperature effects. Two-steps gate-opening behaviour in gas sorption isotherms was found in the flexible Mn-btb-bdc MOFs.
研究领域:
材料科学
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化学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
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IF 8.6
Shucheng Liu,Zhi Hu,Xingchen Yan,Senbai Geng,Xian Zhao,Hongxiang Ou,Jianming Pan
The magnetic boronate based sorbents have been widely used to separation of cis -diol containing flavonoids. However, It's still challenging due to its chemical structural fragility and low grafting efficiency. The major obstacles are low concentration, the hydrophobicity of flavoniods, and complexity of crude extract solutions. For solving these problems, a new kind of covalently connect MOF@boronic acid-functionalized-COFs core–shell hybrid composites based on magnetic colloidal nanocrystal clusters (MCNCs), MCNCs@NH 2 -UiO-66@BTCA-BA-COFs, with high surface area, abundant binding sites and excellent chemical and structurally stability were synthesized for enhancing the structure stability and selective recognition efficiency. The alkynylation COFs were not only to be facilely grated on the surface of magnetic microsphere@NH 2 -UiO-66 via Schiff-based reaction but also beneficial to the further modification of azide phenylboronic acid group via click reaction. Such mentioned advantages and covalently connect click strategy could generate highly structure stable and strong binding sites for the template flavonoids (Naringin, NRG). Adsorption equilibrium experiments were reached rapidly within 120 min, and the maximum equilibrium binding capacities of MCNCs@PDA@NH 2 -UiO-66@BTCA-BA-COFs were 31.20 µmol g −1 for NRG. Moreover, MCNCs@PDA@NH 2 -UiO-66@BTCA-BA-COFs exhibited a stronger selectivity towards NRG than other competitive targets (i.e rutin, catechol, hesperetin, o -nitrophenol). The MCNCs@PDA@NH 2 -UiO-66@BTCA-BA-COFs have shown outstanding reusability of 91.99 % loss in enrichment performance towards NRG after seven times repeatedly. The obtained MCNCs@PDA@NH 2 -UiO-66@BTCA-BA-COFs-based mass spectrum (MS) methods were applied to analyze the purity of NRG products. As excepted, a commercially available NRG with purity (approximately 60 %) could be effectively extracted and concentrated to 93.15 % purity. More interestingly, the separation performance of the sorbents was influenced by hydrophilic and hydrophobic performance. This approach provided an idea for constructing a new kind of hybrid sorbents with both enhanced functionality, suitable hydrophobic performance and fast magnetic-response behavior, which is of great significance to the field of separation and purification of hydrophobic flavonoids.
研究领域:
分离科学
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材料化学
·
药物分析
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zesheng Li,Fangyu Gan,Juncheng Han,Qingrong Yao,Lichun Cheng,Jiang Wang,Jianqiu Deng,Zhao Lu,Qianxin Long,Yan Zhong,Huaiying Zhou,Guanghui Rao
Y 2 O 3 has emerged as a promising material for electromagnetic wave (EMW) absorption due to its excellent dielectric properties . However, the inherent insulating nature and single loss mechanism limit its absorption performance. Research on the microstructure modulation and component regulation of Y 2 O 3 -based absorbers remains relatively unexplored. In this work, Y 2 O 3 /C composites with flower-like architectures were synthesized for the first time via a metal-organic framework (MOFs) templating method. The effects of pyrolysis temperature on the microstructure, phase composition, and EMW absorption performance of the Y 2 O 3 /C composites were systematically investigated. At a pyrolysis temperature of 800 °C, the flower-like Y 2 O 3 /C microsphere exhibited optimal EMW absorption performance. The minimum reflection loss (RL) of pristine Y 2 O 3 was only −4.75 dB, while the Y 2 O 3 /C composite achieved a minimum RL of −51.77 dB and a maximum effective absorption bandwidth of 4.32 GHz. Moreover, by simply adjusting the matching thickness, the optimal sample exhibited strong absorption (RL < −30 dB) over a wide frequency range of 4–18 GHz. The incorporation of carbon effectively neutralized the insulating nature of Y 2 O 3 , thereby optimizing the impedance matching . The synergistic effects of multiple loss mechanisms, including polarization loss, resistance loss, and interfacial polarization, facilitated substantial EMW attenuation . This study provides a promising strategy for the design and fabrication of high-performance rare-earth oxide EMW absorbers with tunable morphologies and properties.
研究领域:
材料科学
·
电磁材料
·
纳米技术
·
复合材料
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Tong Li,Xiaoxia Jia,Hui Chen,Zeyu Chang,Libo Li,Yong Wang,Jinping Li
Adsorption separation technology using adsorbents is promising as an alternative to the energy-demanding cryogenic distillation of natural gas (CH4/N2) separation. Although a few adsorbents, such as metal–organic frameworks (MOFs), with high performance for CH4/N2 separation, have been reported, it is still challenging to target the desired adsorbents for the actual CH4/N2 separation under humid conditions because the adsorption capacity and selectivity of the adsorbents might be mainly dampened by water vapor. Except for the high CH4 uptake and CH4/N2 selectivity, the adsorption material should simultaneously have excellent stability against moisture and relatively low-water absorption affinity. Here, we tuned the ligands and metal sites of reticular MOFs, Zn-benzene-1,4-dicarboxylic acid–1,4-diazabicyclo[2.2.2]octane (Zn-BDC–DABCO) (DMOF), affording a series of isostructural MOFs (DMOF-N, DMOF-A1, DMOF-A2, and DMOF-A3). Because of the finely engineered pore size and introduced aromatic rings in the functional DMOF, gas sorption results reveal that the materials show improved performance with a benchmark CH4 uptake of 37 cm3/g and a high CH4/N2 adsorption selectivity of 7.2 for DMOF-A2 at 298 K and 1.0 bar. Moisture stability experiments show that DMOF-A2 is a robust MOF with low water vapor capacity even at ∼40% relative humidity (RH) because of the presence of more hydrophobic aromatic rings. Breakthrough experiments verify the excellent CH4/N2 separation performances of DMOF-A2 under high humidity.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）