MATERIALS LETTERS
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2016
·
IF 2.437
Xinyu Peng,Yixin Zhang,Ying Chen,Sai Li,Bin He
A well-defined miktoarm star copolymer (μ-PEG-PCL-PLLA) was synthesized and the crystallization behavior of the copolymers was investigated. The structure of copolymer was confirmed by 1 H NMR, the molecular weight and molecular weight distribution were studied by GPC . XRD and POM were used to study the crystallization behavior of the miktoarm star copolymers. The XRD spectra showed that the miktoarm star copolymer showed low crystallinity for the joint of terminal, which limited the mobility of polymeric chains. The POM photographs revealed that PCL segments formed spherulites with PLLA crystalline grains as nucleus due to the good compatibility between PCL and PLLA.
研究领域:
材料科学
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高分子化学
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生物医学材料
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DOI
高影响因子
Energy Technology
·
2016
·Vol. 5
·期 5
·747-755
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IF 2.557
Tingwei Zhang,Wei Fan,Wenzhi Li,Zhiping Xu,Haosheng Xin,Mingxue Su,Yijuan Lu,Longlong Ma
Sn-β zeolite and PTSA–POM, made from the copolymerization of p -toluenesulfonic acid (PTSA) and paraformaldehyde (POM), were used for the production of 5-(hydroxymethyl)furfural (HMF) from glucose in an environmentally friendly solvent system including γ-valerolactone (GVL) and H 2 O. The effects of reaction temperature, reaction time, solvent, and catalyst-to-reactant ratio on the production of HMF were investigated. The combination of the Brønsted acid and Lewis acid catalysts largely improved the catalytic system and resulted in the production of HMF in 60.1 % yield at 140 °C in 30 min. The presence of water in the solvent had a positive influence on the production of HMF from glucose. The combination of the two catalysts also improved the catalytic performance for the production of HMF from cellulose and corn stalk.
研究领域:
化学工程
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可再生资源转化
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催化科学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2018
·
IF 5.158
Jie Lu,Qi Kang,Jianhong Xiao,Tao Wang,Ming Fang,Li Yu
Fabrications and applications of luminescent films have been an interesting and important challenge within the realm of academia and industry. Herein, a novel fluorescence-based strategy for the H 2 O 2 detection has been developed by fabrication of stabilized, thin, transparent, and luminescent films composed of europium-containing polyoxometalates (Eu-POM) and environmentally friendly chitosan (CS) via a facile solution casting approach. In comparison with pure Eu-POM, enhanced fluorescent properties are obtained from the as-prepared Eu-POM/CS films in terms of prolonged fluorescence lifetime and a remarkable fluorescent quenching effect in the presence of hydrogen peroxide (H 2 O 2 ). The fluorescence intensity of Eu-POM/CS films exhibits a linear correlation in response to the H 2 O 2 concentration over a wide range of 1.1–66 μM, with a detection limit of 0.11 μM. Furthermore, the fluorescent films display a high detection selectivity which are capable of differentiating hydrogen peroxide (H 2 O 2 ) from the interfering species, such as sugars, l -amino acids, and other metabolites. All these advances towards the development of Eu-POM/CS films open up new applications for luminescent films, but most importantly, they can help in the far-reaching technological implementations of a simple, cost-effective method for the detection of H 2 O 2 in many fields.
研究领域:
材料科学
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环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
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2018
·Vol. 6
·期 20
·5412-5419
·
IF 5.976
Pengyuan Wang,Xiaoqin Zou,Huaqiao Tan,Sheng Wu,Lingchang Jiang,Guangshan Zhu
Gas sensing performances in ZnO sensors are critically limited by their fast electron–hole recombination, low gas selectivity and elevated operation temperature. To alleviate these problems, new and high-performance sensor materials are desirable. Herein, we fabricate a core–shell composite material of POM@ZIF-8@ZnO with an ultrathin ZIF-8 film containing H5PMo10V2O40 polyoxometalate on the ZnO substrate surface. The device based on this composite exhibits an improved gas sensing ability toward formaldehyde (HCHO) at room temperature (25 °C) with a sensitivity of ∼0.4 ppm. Additionally, the POM@ZIF-8@ZnO material exhibits selective gas responses for reducible gases with small molecular sizes, in particular for a selectivity value of 15.0 for formaldehyde over ethanol. The specific roles of the ZIF-8 shell and POM are discussed in detail: ZIF-8 is responsible for concentrating and recognizing analyte molecules on the ZnO surface, and POM accounts for enhancing the sensing ability. The new material of POM@ZIF-8@ZnO with high performance holds great promise in sensor materials for selective formaldehyde sensing.
研究领域:
材料科学
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传感器技术
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化学
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产品关联
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2024
·
IF 4.2
Haozhe Wang,Dan Li,Qingyao Meng,Xue Li,Kangle Guo,Zehua Zou,Jinsong Peng,Yuan Sun,Tiedong Sun
Bacterial infection of wound surfaces has posed a significant threat to human health and represents a formidable challenge in the clinical treatment. In this study, a novel antimicrobial hydrogel utilizing POM is synthesized as the primary component, with gelatin and sodium alginate as the structural framework. The resultant hydrogel demonstrates exceptional mechanical properties and viscoelasticity attributed to the hydrogen-bonded cross-linking between POM and gelatin, as well as the ionic cross-linking between sodium alginate and Ca 2+ . In addition, the integration of CuS nanoparticles conferred photothermal properties to the hydrogel system. To address the concerns regarding the potential thermal damage to the surrounding normal cells, this study employs a LT-PTT combined with CDT approach to achieve the enhanced antimicrobial efficacy while minimizing the inadvertent harm to the healthy cells. The findings suggested that POM-based hydrogels, serving as an inorganic–organic hybrid material, will represent a promising antimicrobial solution and offer valuable insights for the development of the non-antibiotic materials.
研究领域:
材料科学
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生物医学工程
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药学
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产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Han Wang,Caoling Li,Jingwei Zhang,Zhao Yang,Junjun Li,Yu Cao,Kangbing Wu,Zhihong Liu,Junxing Hao,Xiaoxue Ye
Transition metal sulfides have garnered significant interest in the realm of photoelectrochemical (PEC) sensors due to their remarkable optical and electrical properties. However, their intrinsic UV–vis adsorption and electron-donor consumption severely hinder their nonirritating and in situ epidermal PEC applications. Herein, a NIR-808 nm light-excited heterojunction, phosphomolybdic acid-encapsulated ytterbium-doped bismuth sulfide (Yb-Bi 2 S 3 /PMA), is synthesized by hydrothermal method for self-sufficient electron donor-based PEC sensing. Further, the Yb-Bi 2 S 3 /PMA heterojunction is decorated on flexible and integrated laser-induced graphene electrode arrays, providing ultrafast charge carrier transfer capacity and robust mechanical durability (300 bending cycles) for subsequent wearable PEC sensing. As a showcase, the aptamer molecular recognition-based wearable PEC sensor for sweat trace Neuropeptide Y (NPY, a stress or depression biomarker) presents an ultra-low detection limit (0.39 fM) and good anti-interference ability. Moreover, the integration of wearable PEC aptasensor with signal processing and wireless communication facilitates nonirritating and in situ analysis of sweat trace NPY dynamics in various real scenarios (feeding behaviors, physiological stress, and circadian rhythm). More broadly, this research establishes the foundation for NIR-excitable semiconductors equipped with self-sufficient electron donor capabilities, unlocking the potential for ultrasensitive wearable PEC sensing applications.
研究领域:
材料科学
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生物医学工程
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光电化学传感
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产品关联
DOI
高影响因子
FUEL
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2017
·
IF 4.601
Ming Zhang,Yanchen Wei,Rui Li,Wenshuai Zhu,Hongping Li,Qi Zhang,Miao Wang,Xiao Chen,Huaming Li
It is of great importance to develop efficient catalysts to achieve sulfur removal in fuel, protecting the world against the pollution caused by sulfur oxides. Aiming that, polyoxometalates supported materials have been employed as a vital class of heterogeneous catalysts for oxidative desulfurization. In this study, a serial of magnetic polyoxometalates-based mesoporous silica hybrid materials were successfully prepared over a facile hydrothermal and impregnation method, and evaluated in fast oxidation of aromatic sulfur. These hybrid materials exhibited interesting feature of rapid separation by external magnets, and excellent desulfurization performance to refractory sulfur compounds (benzothiophene, 3-methylbenzothiphene, dibenzothiophene, 4-methyldibenzothiophene and 4,6-dimethyldibenzothiphene). Furthermore, the sulfur removal could still reach 94% after recycling for ten times, which could be potentially applied in industry production.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
Biomaterials Science
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2025
·
IF 5.7
Xinyu Wang,Qingbin He,Lining Wang,Chengzhilin Li,Wenyu Zhang,Zhonghou Rong,Qingqing Yin,Yingchun Zhao
Sepsis, an inflammatory disease caused by bacterial infection, has become a global public health crisis. Excessive reactive oxygen species (ROS) in sepsis patients act as the primary trigger for activating intracellular immune pathways, ultimately leading to multiple organ dysfunction syndrome. The overexpression of acidic metabolites and ROS, characteristic of the infected microenvironment, significantly impedes sepsis treatment. Cyclic GMP-AMP synthase (cGAS), a cytosolic DNA sensor, plays a key role in inflammatory diseases. The detrimental effects of STING in sepsis have been well documented. Here, we developed a pH-responsive nanotherapy platform (DMSNM@C-178/PAA) that combines ROS scavenging with cGAS-STING pathway inhibition for anti-inflammatory therapy. This nanoparticle is selectively released in the infected microenvironment, where reduced molybdenum-based polyoxometalates (Mo-POM) efficiently neutralize toxic ROS in vivo, while C-178 selectively inhibits the cGAS-STING pathway, thereby attenuating the inflammatory response and preventing organ deterioration. In vitro and in vivo studies demonstrate that DMSNM@C-178/PAA treats sepsis by eliminating excess ROS and modulating autoimmune dysfunction via the cGAS-STING pathway, providing a novel therapeutic strategy for sepsis management.
研究领域:
医学
·
免疫学
·
纳米医学
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Jingfang Zhou,Rukang Li
A proton-rich POM-type molybdenum phosphate K12Mo8O20(HPO4)8(PO4)Cl was successfully obtained. It crystallizes in a noncentrosymmetric tetragonal space group of P–4 (No. 81) with the unit cell parameters of a = 9.6580(4) Å, c = 14.2607(10) Å, and Z = 1. The occurrence and positions of the light element H in the structure are inferred from single-crystal X-ray diffraction and confirmed by DFT calculations. The hydrogen atoms are found to form hydroxyl bonds with O atoms from P(2)O4 and P(3)O4 constituting the [Mo4P4O26H4]4– layers but are only weakly bound to the isolated P(3)O4 group through hydrogen bonds. The title compound presents a POM-type framework of corrugated [Mo4P4O26H4]4– layers with four K+ ions and mixed ions (K4Cl3+ and isolated PO43–) orderly imbedding in the interlayer spaces with distances of 5.0396 (1) and 5.5966 (3) Å, respectively. The proton-rich nature and the structure feature were further verified by a series of experiments including 1H, 7Li, and 31P MAS NMR spectra, IR spectroscopy, and thermal analysis. Moreover, the weak bonding and large interlayer spaces make K+ and H+ ions susceptible to exchange with ions of Cs+, Ba2+, Zn2+, Pb2+, Cu2+, and Ni2+ commonly presented in chemical pollutants or nuclear wastes. In addition, the title compound shows a small second-harmonic generation signal, consistent with its noncentrosymmetric structure.
研究领域:
材料科学
·
化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiaojia Li,Yiyang Bai,Jingfang Li,Wenjia Qu,Liye Liang,Guangming Li
In this study, PW 5 V 7 @ rht -MOF-1 ( 1 ) was prepared via one-pot hydrothermal synthesis and its crystal structure was confirmed by X-ray diffraction analysis. To enhance catalytic performance, a series of defect-engineered PW 5 V 7 @ rht -MOF-1 ( 1-D x ) catalysts were further developed by using formic acid (FA) as a modulator. TG, PXRD, and BET analyses demonstrated that defects resulting from ligand deficiency in 1-D x enhanced their specific surface area and porosity, while maintaining the overall structural integrity. XPS, EPR and Py-IR analyses revealed the presence of additional oxygen vacancies and Lewis acid sites in 1-D 0.2 . Experimental results show that, with the assistance of the surfactant, the optimized catalyst ( 1-D 0.2 ) achieves 99.8% sulfur removal within 3 h at 100 °C, significantly improving upon the defect-free catalyst (71.1%). Cycle tests indicate that 1-D 0.2 maintains 93.4% desulfurization efficiency after seven consecutive uses, demonstrating its structural stability. In addition, the radical oxidation mechanism of the AODS reaction was further validated by radical scavenging experiments and EPR. This study presents a novel strategy for designing defect-engineered POM@MOF catalysts and demonstrates their application in deep fuel desulfurization, highlighting the crucial role of defect engineering in heterogeneous catalysis.
研究领域:
催化化学
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材料科学
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化学工程
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纳米技术
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COORDINATION CHEMISTRY
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2015
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IF 2.012
Qiong Wu,Qing Pu,Yongmei Wu,Hongjuan Shi,Yanfang He,Jun Li,Quanshui Fan
The reaction between manganese nitrate and N,Nʹ-(±)-ethylene-bis(salicylicyclohexanediaminate) ((±)-salcy) in dilute lacunary polyoxoanion [PW9O34]9− solution led to isolation of a new Mn-dimer, [Mn((±)-salcy)(N3)]2 (1). Structural analysis indicates that 1 represents the first salcy-based Mn-dimer complex. Magnetic susceptibility studies reveal that 1 shows single-molecule magnet (SMM) behavior from 2 to 5 K.
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DOI
高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 153
·期 4
·1159-1169
·
IF 2.936
Liang Jilei,Fan Mengwei,Wu Wenjie,Wu Mengmeng,Cai Wangshui,Xinxing Gao,Huang Tingting,Rui Haiyun
This study shows the successful encapsulation of sandwich cobalt–tungsten polyoxomolybdate (Na 12 [WCo 3 (H 2 O) 2 (CoW 9 O 34 ) 2 ], abbreviated as CoWPOM) guest in mesoporous metal–organic framework MIL-101 host under static condition via a facile post-synthesis strategy. Several characterizations including powder XRD, FTIR, TGA, SEM–EDS, UV–vis DRS, XRF, and low temperature N 2 adsorption–desorption isotherm demonstrate the incorporation and homogenous-distribution of the sandwich CoWPOM guests in cavities of the MIL-101 host. The CoWPOM@MIL-101 composite possesses a better synergistic effect, and it demonstrates an excellent oxidative desulfurization catalytic activity with the DBT removal of 98.1% and recyclability at least 5 times without obvious activity decrease. Graphical Abstract
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）