COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Chunliang Zhao,Jinghui Wu,Yidi Gao,Jialin Zhou,Leilei Zhang,Chi Wang,Yang Huo,Xianze Wang,Mingxin Huo
The rapid increase in PLA product consumption has led to significant environmental challenges. To address this issue, this study focuses on developing efficient catalysts to accelerate PLA alcoholysis, aiming to enhance degradation efficiency. A novel composite catalyst, SiWMn Ⅲ @MIL-125(Ti), was synthesized by encapsulating Keggin-type polyoxometalate (POM) in the octahedral cavities of MOF(MIL-125(Ti)). The compound was comprehensively characterized, while density functional theory (DFT) calculations further confirmed the potential localization of POM within the MOF. The catalyst exhibited excellent efficiency in the alcoholysis of polylactic acid (PLA) using ethylene glycol (EG) under optimum conditions (1 wt% catalyst, 160 °C, 30 min, EG/PLA molar ratio = 4:1, 18 % POM loading), achieving high PLA conversion. The liquid products were systematically analyzed, proposing their oligomeric structures. Notably, this heterogeneous catalyst could be easily retained by filtration and could be reused for more than 10 cycles without significant activity loss. Combined with DFT simulations, a reasonable catalytic mechanism was elucidated, highlighting the synergistic role of POM@MOF in facilitating alcoholysis of PLA. This work not only provides insights into the design of efficient MOF-based catalysts for polymer degradation but also suggests the potential applicability of POM@MOF systems in other depolymerization processes.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Xin Zheng,Caixia Zhang,Chuntao Luo,Guanghua Tian,Lian Wang,Yongjin Li
The inclusion complex of thermoplastic polyurethane (TPU) and β-cyclodextrins (β-CD) with high TPU contents has been synthesized. The channel structure with large amount of uncovered TPU was confirmed by wide-angle X-ray diffraction (WAXD). High performance poly(oxymethylene) (POM) alloys were fabricated by simply melt mixing neat POM with the synthesized TPU inclusion complex (IC-TPU). The effects of the incorporation of IC-TPU on the structure and properties of POM have been investigated. Scanning electron microscope (SEM) results showed that IC-TPU was dispersed uniformly in POM matrix and there was robust interface between IC-TPU and POM matrix. Tensile test results indicated significant improvement in both strength and ductility of the IC-TPU modified POM as compared with neat POM. Moreover, the incorporation of IC-TPU resulted in the drastically enhanced thermal stability of POM. The initial degradation temperature increased as high as 40 °C with the addition of a small amount of IC-TPU. The investigation indicated that the IC-TPU exhibited a novel structure with a soft shell (uncovered TPU) and a hard core (β-CD covered TPU segments). Such “soft shell–hard core” structure improves not only the elongation at break but also the tensile strength of POM. The superior thermal stability was originated from the synergetic effects of the hydroxyl groups in β-CDs and the amino groups in TPU. The multifunctional effect of the IC-TPU opens a new avenue for the industrial application of POM.
研究领域:
材料科学
·
高分子工程
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 20
·9887-9893
·
IF 3.3
Yao Tang,Zijun Zou,Xingen Wu,Pengfei Zuo,Lei Wang,Guiwen Huang,Jia Zhu,Shengliang Zhong
Designing highly efficient non-precious metal electrocatalysts to facilitate overall water decomposition is critical and highly desirable, but still challenging. In this study, we synthesized ZIF-67@POM nanomaterials by doping H3PMo12O40 in ZIF-67. The molybdenum-doped carbon matrix can effectively reduce CoP agglomeration, which is conducive to improving the specific surface area and active sites of the catalyst. The doping of Mo also optimizes the electronic structure of Mo-CoP-100 and improves its electrocatalytic activity. Compared with CoP derived from pristine ZIF-67, the optimal Mo-CoP-100 exhibits significantly enhanced oxygen evolution reaction (OER) catalytic activity with an almost constant overpotential of 290 mV to maintain a stable current density of 10 mA cm−2 in alkaline media for at least 100 h. Furthermore, compared with traditional precious metal-free OER electrocatalysts, the Mo-CoP catalysts prepared in this work have high specific surface area, rich surface-active sites, good cycling stability and high diffusion efficiency.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·
IF 6.1
Tianhao Yu,peng gao,Hong Du,ling dong
The oxygen evolution reaction (OER) requires the development of a strong and efficient electrocatalyst due to its slow mechanism and high overpotential. Hence, we assembled POM and NiCo-ZIF-67 to obtain the amorphous hollow core-shell material NiCo-ZIF-67@POM (donated as NiCo-ZIF@POM) with high catalytic activity. NiCo-ZIF@POM (1:3) presents a low overpotential (η≈150 mV@10 mA cm-2), a small Tafel slope (100 mV dec-1), and great stability for OER in 1 M KOH solution. Theoretical calculations indicate that the excellent activity of NiCo-ZIF@POM might be attributed to the charge rearrangement due to the interaction between Co and W. In addition, the low electronegativity of P and the high oxidation state of W in POM could accelerate the rapid OH- transfer and induce the intermediates to adsorb on the Co-O-W bridge bond conformation, which improves the performance of the catalytic OER. This study provides a new idea for the secondary assembly of POM and MOF materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2013
·Vol. 2014
·期 2
·345-351
·
IF 3.12
Mei-Lin Wei,Jing-Jing Sun,Xian-Ying Duan
Graphical A 3D metal–Schiff-base–POM-MOF has been constructed by combining in situ two traditional building blocks, a metal–Schiff-base and POM-MOF, and its structure was determined by single-crystal X-ray diffraction. Due to the bonding of H 2 O to otherwise open coordination sites on Cu 2+ ions, it shows good proton conductivities of 10 –5 –10 –4 S cm –1 in the temperature range of 25–100 °C under 98 % RH. A metal–Schiff-base–POM-MOF, {[Cu 3 (L) 2 (H 2 O) 4 ] [Cu(dmf) 4 (SiW 12 O 40 )] · 9H 2 O} n {L = N , N′ -bis[(2-hydroxy-3-methoxyphenyl)methylidene]hydrazine hydrate}, has been synthesized in situ from [SiW 12 O 40 ] 4– , Cu 2+ and L in an H 2 O/dmf/CH 3 OH/CH 3 CN mixture at room temperature, and the product was characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction analysis. X-ray diffraction analysis revealed that the title complex presents a 3D network constructed from Cu II –Schiff-base cations, 1D POM-MOF chains and solvent water molecules. Its water vapour adsorption isotherm at room temperature and pressure shows that the water vapour adsorbed by the complex is 51.67 cm 3 g –1 at the maximum allowable humidity, which corresponds to 7.1 water molecules per unit formula. In addition, it exhibits good proton conductivity (>10 –4 S cm –1 ) at 100 °C in the relative humidity range 35–98 %. The corresponding activation energy ( E a ) of conductivity was estimated to be 0.32 eV.
研究领域:
无机化学
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材料科学
·
固体化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2016
·
IF 3.611
Si-Wen Li,Rui-Min Gao,Rong-Lan Zhang,Jian-she Zhao
A catalyst system designed by a kind of hybrid material POM@MOF-199@MCM-41 (PMM) was found by a one pot and POM template self-construction of MOF-199 in the pore of MCM-41. This catalyst was exploited to act as a stable heteropolyacid-based one in the direct oxidative desulfurization process with a feedstock of model oil under O 2 as oxidant. Based on optimal conditions, the DBT conversion reached up to 98.5% and the PMM could be recycled ten times with a slight decrease, which was compared with heteropolyacid only based on MOF-199 and MCM-41, respectively. Additionally, the structure of ordered nano-sized pores of MOF-199 with POM encapsulated in was clear under crystal analysis, which offered strong evidences for the further movement into the MCM-41.
研究领域:
化学
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Xinlu Yang,Xinyu Xie,Siqi Li,Wenxuan Zhang,Xiaodan Zhang,Hongxiang Chai,Yuming Huang
Herein, we reported the design and fabrication of polyoxometalates coupling metal-organic framework (POM@MOF) hybrids derived hierarchical hollow Mo/Co bimetal oxides nanocages (Mo/Co HHBONs) for the peroxymonosulfate (PMS) activation to degrade levofloxacin (Lev). The Mo/Co HHBONs are hollow nanocages with high specific-surface areas and hierarchical micropores, mesopores , and macropores . In addition to compositional modulation, polyoxometalate (H 3 PMo 12 O 40 ·nH 2 O) exhibited striking effect on the textural properties of Mo/Co HHBONs. The Mo/Co HHBONs had outstanding catalytic activity with first order-kinetics that were 6 − 10 times higher those previously reported. They exhibited good adaptability over a pH range of 3 − 11, as well as excellent universality and reusability. By altering the surface porosity, electronic structure, and oxygen vacancies of Co 3 O 4 , hetero-metal Mo doping induced Mo/Co HHBONs significantly promote the generation of reactive oxygen species , including • OH, SO 4 •− , O 2 •− , and 1 O 2 . Density functional theory indicated that Mo/Co HHBONs had better adsorption, enhanced electron-transfer abilities, and a longer O-O bond length than did Co 3 O 4 , for improved catalytic reactivity. This research provides a new strategy to design the POM@MOF hybrids derived hierarchical hollow nanocages with highly PMS activating capacity for the removal of antibiotics and other refractory contaminants.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yushan Hou,Liping Cui,Qin Wang,Meilin Wang,Gang Li,Kai Yu
Keggin-type polyoxometalate (POM) is a new pseudocapacitive material with advanced multi-electron conduction capability, good mechanical and thermal stability. However, owing to the limited specific interfacial area and inferior conductivity of POMs, it is difficult to exert its excellent redox properties as an electrode material alone. In an effort to overcome these limitations, a heterostructured material MnPMo 8 V 6 @MXene/MoS 2 was developed using a combination of hydrothermal method and electrostatic adsorption, leveraging the synergistic self-assembly of multiple substances. The morphology and sufficient structural characterization reveal that Keggin POM and MoS 2 were homogeneously anchored on the accordion-like MXene leading to a triaryl composite. The resulting composites demonstrate improved overall performance and more efficient ion/electron transport capacity as anode materials for LIBs compared to single-component and binary materials. Typically, the compound presented a superior reversible capacity of 1061.3 mA h g −1 at 0.1 A g −1 , a high capacitance retention of 851.1 mA h g −1 after 300 cycles, and a prominent rate capacity of 450.3 mA h g −1 at 2.0 A g −1 , which surpasses the performance of most reported anodes for LIBs. Kinetic calculations also indicate that the charge accumulation functionality of MnPMo 8 V 6 @MXene/MoS 2 involves diffusion and pseudocapacitive behavior. This study combines the outstanding Faraday properties of Keggin POM, the mechanical strength of MoS 2 and the ultra-high conductivity, low impedance and high specific surface area of accordion-like MXene into the ternary composite. Meanwhile, a unique 3-D conductive network is formed among POM with regular channels, MoS 2 nanosheets and accordion-like MXene. The complementary performance and favorable morphology make the three components produce perfect synergistic effect and outstanding comprehensive lithium-ion batteries performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2022
·Vol. 36
·期 6
·e6693
·
IF 4.072
Jiale Liu,Mengyao Huang,Zhongyu Hua,Jiatong Ni,Yi Dong,Zeran Feng,Tiedong Sun,Chunxia Chen
Chemodynamic therapy (CDT) uses the conversion of H 2 O 2 to ·OH triggered by Fenton-like reactions to treat tumors, but the treatment is not complete due to insufficient intracellular H 2 O 2 content. Photothermal therapy (PTT) uses photothermal materials for photothermal conversion to kill tumors, but it is limited by the extent of exogenous light transmission and cannot achieve satisfactory therapeutic effects. Therefore, designing a composite nanomaterial that amplifies CDT and couples it with PTT for tumor treatment is a major challenge. Herein, we designed a W-POM NCs@HKUST-1 nanoplatform that combines PTT and CDT and has better targeting properties. It shows high stability and photothermal conversion efficiency under the irradiation of near-infrared light and efficiently catalyzes the generation of intracellular hydroxyl radicals, this composite material exhibits higher lethality than single therapeutic strategies. This study expands the application area of POM@MOF composite nanomaterials and provides a promising means of enhanced tumor therapy.
研究领域:
纳米技术
·
癌症治疗
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2022
·Vol. 36
·期 12
·e6888
·
IF 4.072
Tiedong Sun,Zhengya Yue,Yan Song,Jiatong Ni,Wenxin Wang,Junge Zhao,Jialun Li,Yuan Sun,Bin Li
Chemodynamic therapy (CDT) is a highly effective clinical treatment strategy based on the Fenton or Fenton-like responses. However, its efficacy has been greatly limited by the complex tumor microenvironment, TME, such as the low levels of H 2 O 2 and the overexpression of the glutathione (GSH). Polyoxometalates (POMs) are compounds that consist of anionic transition metal oxide clusters, such as tungsten (W) and molybdenum (Mo), and notably, these compounds have excellent redox properties in biological systems that can be utilized therapeutically. Therefore, POM-CaO 2 @ZIF-8 nanoparticles (NPs) have been synthesized and used as a mediator to develop an electrically enhanced CDT strategy. It is hoped that the simultaneous modulation of endogenous (the H 2 O 2 generated by CaO 2 NPs and GSH depletion by POM) and exogenous (Electric, E) stimulation enhanced Fenton-like responses will lead to better therapeutic results. Such a treatment strategy has shown excellent tumor cell killing effects in both in vitro and in vivo studies.
研究领域:
纳米医学
·
癌症治疗
·
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Biao Li,Yuqi Liu,Baizhuang Li,Yusi He,Yufeng Zhang,Xinying Wang,Yuebin Feng,Wei Li
Tetracycline (TC) antibiotics in aquatic environments pose severe ecological and health risks due to their difficult biodegradability and environmental accumulation. Persulfate-based advanced oxidation process (PS-AOP) has been proven to be a promising method for TC degradation in wastewater treatment but requires efficient, stable catalysts. Herein, three melamine-modified POM@MOF composites WCo@C-1, WCo@C-5 and WCo@C-10 (WCo-PMOFs and melamine in mass ratios of 1:1, 1:5, and1:10, respectively) were synthesized by calcining a mixture of WCo-PMOFs and melamine, which were used as catalysts for peroxymonosulfate (PMS) activation to degrade TC efficiently. The results demonstrated that the TC degradation rate by WCo @ C-10 activated persulfate (PMS) reached 95.83 % within 2 h superior to that of WCo@C-1 and WCo@C-5 under the same experimental conditions. Notably, the WCo@C-10/PMS system exhibited exceptional cycling stability, maintaining a degradation efficiency of 83.51 % even after four consecutive cycles. The X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS) characterization results indicate that the WCo@C-10 composite material exhibits outstanding catalytic performance. This characteristic is mainly attributed to the significant improvement in the material's dispersion and its having the smallest impedance arc radius among a series of materials, which reflects a lower charge transfer resistance and excellent electrical conductivity. These characteristics synergistically promote the efficient conversion of Co(III) to Co(II). The quenching experiment combined with electron paramagnetic resonance (EPR) analysis confirmed that superoxide radicals (O 2 ·- ) and singlet oxygen ( 1 O₂) are the main reactive oxygen species in this system. This study provides a new idea for designing efficient PMS-based advanced oxidation systems.
研究领域:
环境化学
·
材料科学
·
催化化学
·
水处理技术
·
环境污染与控制
·
纳米功能材料
·
自由基反应机制
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Fangshu Xing,Renyou Zeng,Chuchu Cheng,Qiuwen Liu,Caijin Huang
Efficient aromatic alcohol oxidation with simultaneous H 2 evolution under aqueous conditions is achieved in a polyoxometalate (POM)-incorporated ZnIn 2 S 4 dual-functional photocatalytic system. The synergy between HPM and ZIS contributes to the formation of a Z-type heterojunction structure and thus enhances redox capacity. Moreover, the sub-nanometer size of POM clusters endows molecular-level interfacial contact, which acts as an "electron bridge" ensuring faster interfacial charge transfer kinetics. Therefore, an impressive nearly 100% yield of benzaldehyde and 10.6 mmol·g −1 ·h −1 H 2 -evolution rate are observed for POM/ZIS nanocomposites even under an anaerobic atmosphere with water as the solvent. This is the first application of POM-based materials in the anaerobic oxidation of benzyl alcohol with concomitant H 2 production. This study expands the possibilities for designing multifunctional POM-based photocatalysts for economic and ecological photoredox applications.
研究领域:
光催化
·
材料科学
·
环境化学
·
能源转换
✓ 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）