CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Yingjie Zhan,Kun Wu
Polystyrene (PS) nanospheres are non-covalently modified by PDDA, and a series of flexible nanocomposite films are fabricated with MXene nanosheets through electrostatic self-assembly and further hot-pressing. Due to the strong surface reactivity and the large specific surface area of the f-PS nanospheres, they are completely encapsulated by MXene nanosheets by serval interaction forces. This prevents the MXene nanosheet defect of easily stacked and agglomerated and maximizes the high thermal conductivity of MXene. SEM characterization verifies that a compact and long-range ordered thermal conductive path is formed in the microstructure of the nanocomposite film, as well as effectively improves interface compatibility, and reduces the generation of interfacial thermal resistance. At the same time, combined with the morphology results of the prepared nanostructures, the effects on thermal conductivity, flame retardant properties and mechanical properties are analyzed in detail. When the amount of filler is 90 wt%, the in-plane thermal conductivity increases dramatically to 40.39 W m −1 K −1 , which is 74.8 times that of f-PS. What's more, the 90M/f-PS nanocomposite film exhibited satisfactory flame retardancy and thermostability, decreasing the PHRR from 300 to 58 W g −1 and 70.0 wt% residue. This study provides a facile route for the design of thermal management interface materials with high thermal conductivity and flame retardant properties.
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ACS Applied Energy Materials
·
2024
·
IF 5.4
Lei Zhou,Xin Wei,Junxiang Zhang,Xuecui Mei,Yun Li,Chaoyue Zheng,Furong Zhang,An Wen,Bin Wang
Sulfide solid electrolytes (SSEs) have some huge advantages in high room-temperature conductivity, good thermal stability, low interfacial resistance, etc. They are one of the ideal solid electrolytes for developing high energy density and high safety for all-solid-state lithium batteries (ASSLBs). However, the preparation of SSEs requires expensive Li2S as the raw material, whose high cost limits its practical application. Herein, a cost-effective SSE Li7.3P2.9S10.75X0.3 (X = F, Cl, Br, and I) was designed and prepared by using low-cost lithium and sulfur instead of expensive Li2S. Significantly, the cost of SSEs was reduced from $169.72 to $28.13 kg–1 based on replacing the Li2S strategy. Moreover, the prepared Li7.3P2.9S10.75X0.3 (X = F, Cl, Br, and I) solid electrolytes have a high ionic conductivity of 1.86–2.73 mS cm–1 at room temperature and a high voltage window of 5 V. On this basis, we assembled the all-solid-state lithium battery TiS2/Li7.3P2.9S10.75I0.3/Li–In, which presented a high initial discharge capacity of 219 mA h g–1 at room temperature and satisfactory cycle stability with a capacity retention of 86.7% after 100 cycles at 0.50 mA cm–2. This work provides an effective strategy for reducing the cost of SSEs, advancing the practical process of ASSLBs.
研究领域:
材料科学
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能源技术
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TALANTA
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2012
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IF 3.794
Xiu-Ming Liu,Ya-Ping Li,Wei-Chao Song,Qiang Zhao,Xian-He Bu
A new ditopic ion pair receptor 1 containing two biindole moieties and a bis-benzocrown ether unit shows a remarkable color switching (ON- and -OFF) function induced by anion (F − ) and cation (K + ) recognition. The ditopic receptor 1 binds in a cooperative fashion to HSO 4 − in the presence of 1 ·K + and acts as a selective ditopic receptor to recognize ion pairs with a wavelength-ratiometric manner.
研究领域:
超分子化学
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分析化学
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传感器与探针
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阴离子识别
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分子开关
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SENSORS
·
2021
·Vol. 22
·期 1
·8
·
IF 3.576
Xufang Huang,Wei Sheng,Haonan Chen,Biao Zhang,Na Huang,Shuo Wang
A competitive fluorescence immunoassay for the quantitative detection of 2-amino-3-methylimidazo [4,5-f] quinoline (IQ) in pan-fried meat patties was developed, using magnetic nanoparticles coupled with coating antigen as the capture probe and anti-IQ antibody coupled with NaYF4: Yb, Er upconversion nanoparticles as the signal probe. Under optimal conditionals, the wide detection range for IQ in phosphate buffer saline is from 0.01 to 100 μg·L−1(R2= 0.991) with a detection limit of 0.007 μg·L−1. This proposed method has been applied to detect IQ in two different types of pan-fried meat patties at varying frying times, and the IQ content in chicken patties and fish patties are 2.11–3.47 μg·kg−1and 1.35–2.85 μg·kg−1, respectively. These results are consistent with that of the ultraperformance liquid chromatography-tandem mass spectrometry. In summary, this method can serve as a sensitive and specific test tool for the determination of IQ in processed meat.Keywords:2-amino-3-methylimidazo [4,5-f] quinoline;upconversion nanoparticles;magnetic separation;fluorescence immunoassay;heat processed meat
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SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yang Li,Jia-Jia Li,Qing Zhang,Jian-Yong Zhang,Na Zhang,Yong-Zheng Fang,Jinwu Yan,Qinfei Ke
The highly emissive BODIPY (boron-dipyrromethene) have been grafted on the Eu-based metal-organic frameworks (Eu-MOFs) via the covalent F-B bonding using a facile one-pot solvothermal reaction. The fluorescence emission ratio of [email protected] has been applied to construct the ratiometric fluorescence sensor for the F - , H 2 O 2 and glucose detection in water solution and living cells. The produced [email protected] probe provided enhanced sensitivity, higher selectivity and lower lower limits of detection (LOD) for the detection of F - (0.1737 μM), H 2 O 2 (6.22 nM) and glucose (6.92 nM), and 5.96, 6.52 and 6.95 times lower than that for single Eu-MOF, respectively. More importantly, the probe also exhibited the lower biotoxic in living cells for bioimaging and the better visualization performance with multiplex channels. The results indicated the π-conjugated BODIPY derivative not only acted as the surfactant molecule or template agent for preferred growth, but also modulated the fluorescent emissions drastically, and thus induced excellent fluorescent detecting performances.
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Journal of Physical Chemistry C
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2020
·
IF 4.189
Yefeng Feng,Furong Zhou,Maolin Bo,Yuehao Huang,Qihuang Deng,Cheng Peng
High dielectric constant and breakdown strength are crucial for high-energy-density polymer/ceramic composites. Anatase-TiO2 with low dielectric constant and V2C MXene with high work function are not satisfactory fillers. In the present work, V2C–TiO2 hybrid filler was in situ synthesized, followed by fabricating poly(vinylidene fluoride) (PVDF)/V2C–TiO2 composites via solution cast. Compared with PVDF/TiO2 and PVDF/V2C composites, PVDF/V2C–TiO2 composites have an improved high dielectric constant, depressed low dielectric loss, and maintained high breakdown strength. High overall electric traits are ascribed to the synergy of conductive V2C and semiconductive TiO2. Outer and inner surfaces of V2C were ornament-combined by anatase-TiO2 particles having surface point defects as electron traps, contributing to low interface leakage conduction. Through density functional theory (DFT) calculations, nontypical V–F–Ti-bonding-induced dipole enhancement and Fermi-level (EF) overlapping-induced high electron localization mechanisms improve the dielectric response. Ternary composite with 10 wt % hybrid filler exhibits a dielectric constant of ∼99, a dielectric loss of ∼0.24 at 1 kHz, and a breakdown strength of ∼189 MV/m. This work might enable large-scale preparation of promising polymer/MXene composite dielectrics.
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ACS Omega
·
2020
·
IF 2.87
Ming Hu,Xue-Qiong Yang,Cui-Fang Wang,Tong-De Zhao,Dai-Li Wang,Ya-Bin Yang,Zhong-Tao Ding
Six new polyketides named paraverrucsins A–F (1–6) with oxabicyclic and dioxatricyclic skeletons, together with eight known metabolites (7–14), were discovered and isolated from the fermentation medium of Paraphaeosphaeria verruculosa. Paraverrucsin A–C possessed a novel decarboxylated skeleton compared with that of trichocladinols. Their structures were elucidated by extensive spectral analysis and DP4+ calculations. Paraverrucsins B/C and D/E were isolated as a mixture for the mutarotation occurred at C-2. Paraverrucsins B/C, D/E, F/trichocladinol B, 8, and 9 displayed antifeedant activities against silkworm larvae, with antifeedant index percentages ranging from 62.5 to 93.0%, at a concentration of 50 μg/cm2. Among them, Paraverrucsins B/C and 9 had EC50 values at 13.9 and 18.2 μg/cm2. Most compounds showed antifungal activities against phytopathogenic fungi with minimum inhibitory concentration (MIC) values of 16–64 μg/mL. Coculture of P. verruculosa and host plant Dendrobium officinale leads to the enhancement of antifeedant and antiphytopathogenic activities. Compounds 1, 2/3, 4/5, 6/14 were tested for cytotoxicity against five human carcinoma cell lines, HL-60, A549, MCF-7, SW480, and SMMC-7721, while they exhibited selected cytotoxicity against SW480 with inhibition ratios of 32–38% at a concentration of 40 μM.
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Nano Energy
·
2020
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IF 16.602
Shuwei Han,Duo Chen,Jian Wang,Zhen Liu,Fan Liu,Yuke Chen,Yanchen Ji,Jinbo Pang,Hong Liu,Jingang Wang
Piezotronic effect has been thought as a general approach for building high performance hybrid photocatalysts by integrating semiconductor nanostructures on piezoelectric materials . Although polyvinylidene fluoride (PVDF) has been widely applied as a flexible piezoelectric material, it is thought that assembling inorganic semiconductor nanostructures on PVDF surface is promising owing to the high hydrophobic property of PVDF. In this study, we proposed that the coordination effect between a metal ion and an exposed fluorine atom on the surface of PVDF can be used to assemble a layer of photocatalytic metal oxide nanostructures on the PVDF film surface. Using Sn 3 O 4 as a model oxide, a Sn 3 O 4 /PVDF hybrid nanostructured photocatalyst was successfully synthesized. The X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy results confirmed the existence of coordinated bonds between F ions and metal ions, which could explain the stable growth of inorganic nanostructures on the hydrophobic surface of PVDF. At the interface between Sn 3 O 4 and PVDF in the hybrid nanostructured photocatalyst, a built-in electric field was constructed on the basis of the ferroelectric field of the PVDF film, which induced an enhanced photocatalytic property. Most importantly, the swing driven by flowing water can considerably enhance photocatalytic properties owing to the piezotronic effect-driven alternating reconstruction of built-in electric field induced by the deformation of PVDF film. This study provides an approach for the synthesis of metal oxide semiconductor nanostructures on hydrophobic PVDF polymer surface . The developed material will have many applications in the photodegradation of organic pollutants in waste water.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 8
·1-13
·
IF 6.232
Min Jie,Qu Xiang-Long,Yan Bing
A novel fluorescent and electron-deficient hybrid, N -methylated [Eu (pddb)phen(ox) 0.5 ] n (Eu-MOF-Me) has been prepared via post-synthetic modification. Considering its special luminescent properties and cationic framework, Eu-MOF-Me is developed as a visualized fluorescent probe. Notably, water-stable Eu-MOF-Me exhibits advantages like good structural and fluorescent stability in a wide range of pH value (3.39–10.86), excellent identification ability for F − , I − , and S 2− (it can easily distinguish F − and I − from other halogen ions and can realize naked eye identification of F − , I − , and S 2− ), relatively low detection limits (6.61 μM for S 2− , 7.57 μM for F − ), and reusability. More importantly, it has been utilized for the construction of a Boolean logic gate system. In this system, Eu-MOF-Me serves as the gate, by taking F − , I − , and S 2− as the inputs and fluorescence emission bands (UV380, B437, and R612) as the outputs; some primary logic gates (NOR, IMP, YES, NOT) and the combination of them have been realized. Moreover, we achieved a cascaded logic gate (NOR+OR). For further application, a molecular computing keypad-lock security system has been obtained.
A novel fluorescent and electron-deficient hybrid named Eu-MOF-Me has been prepared via post-synthetic methylation. Considering its special luminescent properties and cationic framework, Eu-MOF-Me was developed as a fluorescent probe for the visual monitoring of important anions. In addition, it was used for the construction of Boolean logic library and a keypad-lock system was achieved
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JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Gangan Wang,Chaoyi Chen,Junqi Li,Fan Yang,Linzhu Wang,Xin Lin,Hao Wu,Jun Zhang
Brown corundum fly ash (BCFA) is a solid waste from the brown corundum smelting process that contains abundant Ga, K, Si, and Al, but effectively extracting Ga can be challenging since most of it is located inside the particles. This study proposes a comprehensive utilization method of BCFA that combines hydrothermal leaching and alkali regeneration to extract Ga efficiently while producing silica-potassium compound fertilizer (SPCF) and zeolite F. By utilizing the transformation of phase and structure in the hydrothermal leaching process, Ga extraction is efficiently achieved. The results showed that under the conditions of 210 g/L KOH concentration, a liquid solid ratio of 25 mL/g, and 160 °C hydrothermal leaching for 60 min, the extraction efficiencies of Ga, K, and Si were 95.91 %, 51.78 %, and 69.57 %, respectively. The solid product’s effective SiO 2 and K 2 O contents increased to 24.72 wt% and 17.74 wt%, respectively, which can be further used as SPCF for agricultural production. The hydrothermal leaching solution was regenerated by adjusting the Al/Si molar ratio and crystalizing at 160 °C for 24 h. The Si was recovered in the form of high value-added zeolite F, with only a 3.60 % loss of Ga.
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JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Kengqiang Zhong,Henghui You,Lei Huang,Han Li,Linzhe Huang,Xianjie Liu,Hongguo Zhang
The metal-free carbon-based catalyst with low cost and high oxygen reduction reaction (ORR) activity is urgently desired to satisfy the demands of microbial fuel cells (MFCs). However, it is still a great challenge to develop a facile and feasible strategy to construct efficient active sites of heteroatom doping for carbon-based electrocatalyst . Herein, we report a strategy based on an ammonium fluoride (NH 4 F) gas-steamed metal-organic frameworks (MOFs) to heighten structural defects and density of N, F active sites of metal-free catalyst. Oxygen temperature-programmed deposition and density functional theory results confirm that the NH 4 F gas-steamed process greatly enhances the adsorption affinity of O 2 and oxygen intermediates on the catalysts. The resulted N and F co-doped porous carbon cage (FNC-15) demonstrates outstanding ORR catalytic activity and long-term stability in alkaline and neutral electrolytes. This work proposes a facile and efficient in situ gas-steamed strategy to develop metal-free cathode catalysts with superior performance.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 34
·e54301
·
IF 3
Lulu He,Taofang An,Min He,Qiao Fan,Jifei Yang,Yufei Liu,Shuhao Qin,Jie Yu
The anti-moisture absorption and thermal properties of bio-based polyamide 56 (PA56) were improved by adding heat-resistant agents to expand its application in the automotive field. Two macromolecular heat-resistant agents, p(N-(4-F-phenylmaleimide)-alt-styrene) (PFS) and p(N-(4-F-phenylmaleimide)-alt-triallyl isocyanurate) (PFT), were synthesized via precipitation polymerization, and their effects on the thermal properties, mechanical properties, and anti-moisture absorption of PA56 were studied. Compared with PA56, the heat deflection temperature of PA56/PFS and PA56/PFT composites was improved by 11.9% and 21.2%, with their anti-moisture absorption increasing by 14.6% and 15.5%, respectively. This is due to the crystallization of PA56 has been promoted and its more complete crystal structure has been obtained.
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