Coatings
·
2023
·Vol. 13
·期 3
·626
·
IF 3.4
Xinglong Chen,Wenyue Guo,Rui Li,Peng Du,Xiaowen Zhan,Shan Gao
The development of cobalt-free P2-Na2/3Ni1/3Mn2/3O2cathodes is hampered by poor electrochemical performance, resulting from structural instability during high-voltage cycling. Herein, Li+and F−ions are introduced simultaneously via a simple sol–gel method. The F not only enters the lattice but forms chemically stable NaF on the surface. The modified electrode delivered significantly better electrochemical performance than the pristine one, including much-enhanced capacity retention (64% vs. 36%, 100 cycles) at 0.5 C and a four-time higher capacity output at 10 C. The ex situ XRD and in situ Raman analysis revealed cyclability enhancement mechanisms in terms of inhibiting the P2–O2 phase transition and Na+/vacancy ordering. The conductivity measurements (based on AC impedance and DC polarization) and GITT analysis proved, on both bulk material and electrode levels, that Na+conduction and, thus, rate performance is notably promoted by doping. The individual contribution of Li and F to the overall performance improvement was also discussed. Furthermore, a solid-state sodium-metal battery was successfully demonstrated with the modified cathode. The above results verify that Li+/F−incorporation can enable enhancements in both cyclability and rate capability of the P2-Na2/3Ni1/3Mn2/3O2cathodes and are expected to provide a new perspective for the rational design of high-performance layered oxide cathode materials for progressive sodium-ion batteries.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Daoyan Feng,Yu Liu,Chen Zhao,Han Su,Xia Kong,Yu Zhong,Junzhang Wang,Zhou Xu,Xiuli Wang,Xingzhong Guo,Jonghee Lee,Jiangping Tu
Achieving a stable interface between sulfide solid-state electrolytes (SSEs) and high-voltage Ni-rich oxide cathodes is crucial for enhancing the electrochemical performance of all-solid-state batteries (ASSBs). However, addressing the interface challenges through surface coating modifications remains a significant hurdle. In this work, a straightforward modification approach is proposed to achieve a highly stable interface by surface dual doping of Zr and F in LiNi 0.83 Co 0.12 Mn 0.05 O 2 (NCM83) cathodes via acid washing followed by annealing. First-principle calculations demonstrate the thermodynamic stability of Zr-F doped NCM83, effectively inhibiting the formation of unfavorable interfaces with decomposition products. The modified NCM83-1% ZrF cathode exhibits exceptional long-cycle stability, retaining 85.1% of its capacity after 1000 cycles at 0.5C rate. This simple and scalable modification strategy offers a new perspective for the design of high-performance sulfide-based ASSBs.
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高影响因子
ORGANIC & BIOMOLECULAR CHEMISTRY
·
2020
·Vol. 18
·期 34
·6724-6731
·
IF 3.412
Fazhou Yang,Ziyan Liu,Hao Liu,Yu Shangguan,Hao Deng,Jiaxing Huang,Yumei Xiao,Hongchao Guo,Cheng Zhang
A copper-catalysed cascade ester amidation/radical cyclization of 2-amino-1,4-naphthoquinones with α-bromocarboxylates to afford benzo[f]indole-2,4,9(3H)-triones is described, and the reaction has a broad substrate scope and the desired products are obtained in mostly moderate to good yields. Mechanism-probing experiments indicate that the otherwise challenging radical coupling reaction of α-bromocarboxylates with 2-amino-1,4-naphthoquinones is facilitated by a 5-endo radical cyclization.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
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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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Weina Shi,Yanqing Zhu,Cong Shen,Jifu Shi,Gang Xu,Xiudi Xiao,Runqiang Cao
Thermochemical heat storage based on inorganic salt hydrates is a promising approach to relieve the heat energy supply and demand conflicts, but there exist lots of defects of pure salts when applied to the thermochemical. This paper attempted to use functionalized Metal-Organic Frameworks (MOFs) as the porous matrices to improve the heat storage performance of inorganic salt hydrates. A series of MOFs/CaCl 2 composites based on MIL-101(Cr)-X (X = -NH 2 , –SO 3 H, H, –CH 3 , –F) were successfully synthesized and fully characterized by combining multiple techniques (i.e. powder X-ray diffraction, scanning electron microscopy , energy-dispersive X-ray analysis, N 2 adsorption-desorption, Fourier transform infrared spectroscopy , thermogravimetric and differential scanning calorimetry). The water sorption properties of the series of MOFs/CaCl 2 composites were studied during the hydration process, and a continuous adsorption/desorption experiment was also performed to investigate the cycle stability of the MOFs/CaCl 2 composites. The results show that the hydrophilic MOFs based composites have higher water sorption capacity (0.6 g(H 2 O)/g(sample) for MIL-101(Cr)–SO 3 H/CaCl 2 ) accompanied with higher heat storage density (1274 J/g for MIL-101(Cr)–SO 3 H/CaCl 2 ). Moreover, the series of MOFs all presented excellent cycle performance with little loss after continuous 17 adsorption/desorption cycles.
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高影响因子
Forests
·
2026
·Vol. 17
·期 8
·956
·
IF 3.1
Yong Wang,Yongyao Li,Zhongjun Cheng,Caiyun Wang,Min Liu,Maochang Zhou,Xiangyu Zhang
Under-forest wild-simulated cultivation ofGastrodia elataBl.f. glauca S. Chow(Wu Tianma, WTM) offers a viable pathway for reconciling ecological conservation with economic and health benefits, yet optimal seed tuber regimes remain understudied. We established nine planting regimes varying in single-tuber weight and per-hole dosage in a karst plateau area, monitored tuber yield and bioactive components (gastrodin,p-Hydroxybenzyl alcohol, and parishin), and evaluated performance via one-way ANOVA and a comprehensive index. At equal per-hole dosage, individual tubers of 10–15 g achieved the highest comprehensive index (57.13%), whereas those <5 g performed poorly (28.66%). With respect to seeding rate, the maximum yield (5.27 kg/m2) was achieved at 250 g per hole, while the highest combined content of gastrodin andp-Hydroxybenzyl alcohol (0.29%) and the peak parishin content were observed at 350 g and 150 g per hole, respectively. While tuber weight and seeding rate significantly affected yield, they had minor impacts on bioactive composition, suggesting that medium-sized seed tubers with moderately increased dosage can synergistically improve yield and quality. Our findings provide empirical benchmarks for germplasm selection and agronomic optimization in WTM cultivation, and call for multi-scale studies integrating soil microbiota and microclimate to unravel cascading mechanisms for sustainable quality enhancement.
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高影响因子
LUMINESCENCE
·
2026
·Vol. 41
·期 9
·e70613
·
IF 2.8
Dajie Zou,Chenyan Lu,Huye Li,Xiaohua Xu,Min Ma,Chengdangzhi Wen,Huan Wang,Jiuli Wang
Dopamine hydrochloride (DPH) is a key neurotransmitter, and its dysregulated concentration has been linked to various neurological disorders. Meanwhile, potassium permanganate (MnO 4 − ), a potent oxidant, poses significant environmental risks when discharged in excess. Therefore, sensitive detection of MnO 4 − and DPH is essential. In this work, nitrogen, sulfur, and fluorine tridoped carbon dots (N,S,F-CDs) were prepared through a hydrothermal route using Aconitum pendulum Busch extract as a biomass-derived carbon source, with thiourea and sodium fluoride serving as heteroatom dopants. The obtained N,S,F-CDs exhibited bright blue emission, good aqueous dispersibility, and a fluorescence quantum yield of 43.16%, with strong emission at 408 nm under 345-nm excitation. Upon addition of MnO 4 − , the fluorescence was efficiently suppressed owing to the combined contribution of inner-filter effect and dynamic quenching. Subsequent introduction of DPH reduced MnO 4 − and recovered the fluorescence signal, enabling the construction of an “ON–OFF–ON” sensing platform. Under optimized conditions, the sensor displayed linear responses of 5.03–275.23 μM for MnO 4 − and 6.11–371.02 μM for DPH, with detection limits of 0.25 and 0.68 μM, respectively. The method was further applied to tap water, serum, and orange juice samples with satisfactory recoveries, indicating its potential for environmental and bioanalytical detection.
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高影响因子
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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高影响因子
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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高影响因子
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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PubMed
高影响因子
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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高影响因子
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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PubMed
高影响因子
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