JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 18
·14711-14721
·
IF 2.779
Feng Dong,Chen Qiduo,Mei Yi,Chen Xinzhi,Zeng Tianbiao
LiNi 0.8 Co 0.15 Al 0.05 O 2 (NCA) cathode material was usually prepared with Ni 2+ , Co 2+ , Al 3+ co-precipitation method using NaOH/NH 3 ·H 2 O aqueous solution with strictly control of liquid feeding rate and pH value. In this contribution, a facile method was proposed to co-precipitate Ni 2+ , Co 2+ , Al 3+ for synthesizing NCA using (NH 4 ) 2 C 2 O 4 ·2H 2 O as precipitant without control of pH and liquid feeding rate. The impact of reagents (sulfate reagents, nitrate reagents, chloride reagents, acetate reagents) on morphology, micro-structure and final electrochemical performances of NCA were systematically studied. It was suggested that sulfate reagents are suitable for synthesizing NCA. Furthermore, an optimum synthesis route was further selected for mass production. The NCA delivered reversible specific capacity of about 200 mAh g −1 , 191 mAh g −1 , 177 mAh g −1 , 153 mAh g −1 , 132 mAh g −1 , 115 mAh g −1 , 105 mAh g −1 and 94 mAh g −1 at 0.1 C, 0.5 C, 1 C, 2 C, 3 C, 4 C, 5 and 6 C, respectively. Considering the facile and economical synthesis method of precursor, this work can be a footstone for advancing the practical application of NCA cathodes.
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高影响因子
Frontiers of Environmental Science & Engineering
·
2022
·Vol. 16
·期 9
·1-12
·
IF 6.048
Ma Tao,Hui Haiqing,You Xiaofei,Pei Zhiqiang,Tian Miao,Wu Bing
Nanofibre-supported forward osmosis (FO) membranes have gained popularity owing to their low structural parameters and high water flux. However, the nanofibrous membranes are less stable in long-term use, and their fouling behaviours with foulants in both feed solution (FS) and draw solution (DS) is less studied. This study developed a nanofibrous thin-film composite (TFC) FO membrane by designing a tiered dual-layer nanofibrous substrate to enhance membrane stability during long-term usage and cleaning. Various characterisation methods were used to study the effect of the electrospun nanofibre interlayer and drying time, which is the interval after removing the M-phenylenediamine (MPD) solution and before reacting with trimesoyl chloride (TMC) solution, on the intrinsic separation FO performance. The separation performance of the dual-layer nanofibrous FO membranes was examined using model foulants (sodium alginate and bovine serum albumin) in both the FS and DS. The dual-layer nanofibrous substrate was superior to the single-layer nanofibrous substrate and showed a flux of 30.2 L/m 2 /h (LMH) when using 1.5 mol/L NaCl against deionised (DI) water in the active layer facing draw solution (AL-DS) mode. In the fouling test, the water flux was effectively improved without sacrificing the water/solute selectivity under the condition that foulants existed in both the FS and DS. In addition, the dual-layer nanofibrous TFC FO membrane was more robust during the fouling test and cleaning.
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2017
·Vol. 312
·期 3
·599-607
·
IF 1.282
Liu Guiqing,Wang Wei,Lin Jianguo,Li Ke,Lv Gaochao,Zhao Xueyu,Wang Shanshan,Luo Shineng,Qiu Ling
16α- 18 F-fluoroestradiol ( 18 F-FES) has been developed as a promising positron emission tomography (PET) imaging agent for targeting estrogen receptor positive (ER + ) breast cancer in the clinical trial. However, the radiosynthesis of 18 F-FES often requires two steps and tough experimental conditions. Therefore, a new estradiol derivative ( 18 F-AmBF 3 -ES) was prepared by an efficient one-step 18 F-radiolabeling method. The tracer was obtained in high yield (~65%) and excellent radiochemical purity (>98%) within 30 min. The uptake rate of 18 F-AmBF 3 -ES in ER + cells was about 3.5% at 30 min. The results suggested that the tracer may be a potential PET imaging agent for ER + breast cancer.
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高影响因子
Frontiers of Chemical Science and Engineering
·
2023
·Vol. 17
·期 12
·2050-2060
·
IF 4.5
Ren Jiahui,He Yongping,Sun Haidong,Zhang Rongzi,Li Juan,Ma Wenbiao,Liu Zhong,Li Jun,Du Xiao,Hao Xiaogang
Reducing the dissolution of Mn from LiMn 2 O 4 (LMO) and enhancing the stability of film electrodes are critical and challenging for Li + ions selective extraction via electrochemically switched ion exchange technology. In this work, we prepared a nitrogen-doped carbon cladding LMO (C-N@LMO) by polymerization of polypyrrole and high-temperature annealing in the N 2 gas to achieve the above purpose. The modified C-N@LMO film electrode exhibited lower Mn dissolution and better cyclic stability than the LMO film electrode. The dissolution ratio of Mn from the C-N@LMO film electrode decreased by 42% compared to the LMO film electrode after 10 cycles. The cladding layer not only acted as a protective layer but also functioned as a conductive shell, accelerating the migration rate of Li + ions. The intercalation equilibrium time of the C-N@LMO film electrode reached within an hour during the extraction of Li + ions, which was 33% less compared to the pure LMO film electrode. Meanwhile, the C-N@LMO film electrode retained evident selectivity toward Li + ions, and the separation factor was 118.38 for Li + toward Mg 2+ in simulated brine. Therefore, the C-N@LMO film electrode would be a promising candidate for the recovery of Li + ions from salt lakes.
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高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2016
·Vol. 19
·期 5
·915-923
·
IF 1.853
Hao Junsheng,Wang Pan,Zhang Yongbin,Zhang Yue
A series of novel pyridinium cationic gemini amphiphiles, 3,3′-(carbonyldiimino)bis (1- n -alkylpyridinium) dibromides, having octyl, decyl, dodecyl, tetradecyl alkyl chains were synthesized. The surface properties and aggregation behavior in aqueous solution were evaluated by surface tension, dynamic light scattering (DLS), and transmission electron microscopy (TEM) measurement. The adsorption at the air/solution interface of all the compounds were quantitative described using the Frumkin model, and the effect of alkyl chain length on surface activity and aggregate behavior was analyzed. It was found that all the gemini amphiphiles possess surface activity and low critical micellization concentration (CMC) values. The values of log CMC depended linearly on the carbon number of the alkyl chains, but the surface tension at the CMC (γ cmc ) showed a minimum for the compound with dodecyl chains. Combinations of DLS and TEM observations showed the existence of vesicles with a broad size distribution in aqueous solution. Meanwhile, vesicles formed below the CMC could be a possible reason for the observed deviation of surface tension curves from the Frumkin model.
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SN Applied Sciences
·
2019
·Vol. 1
·期 3
·1-10
·
IF 0
He Shiwei,Xu Ruidong,Guo Yuqing,Zhao Zhuo,Yu Bohao,Xiao Saijun,Lv Huihong
In this study, β-PbO 2 –Co 3 O 4 composite coatings were synthesized on a substrate using the electrodeposition method in an electrolyte containing Pb 2+ and Co 3 O 4 particles. The preparation process study shows that the β-PbO 2 bath containing Co 3 O 4 particles becomes more stable for an ultrasonic dispersion time within 30 min, with the stability beginning to decrease after the ultrasonic time exceeds 30 min. Co 3 O 4 particles in the β-PbO 2 bath are positively charged, with anions being adsorbed onto the particles. The nucleation behavior study shows that the electric field force plays a dominant role in the adsorption process for the Co 3 O 4 particles. The nucleation and growth of β-PbO 2 on the Co 3 O 4 particles started for the particles closer to the substrate. In addition, the thickness of the β-PbO 2 layer on the Co 3 O 4 particles was inversely proportional to the distance between the Co 3 O 4 particles and the substrate. Compared to the pure PbO 2 electrode, the oxygen evolution overpotentials for the β-PbO 2 –Co 3 O 4 electrode are decreased significantly, which demonstrates an energy-saving effect.
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IRANIAN POLYMER JOURNAL
·
2014
·Vol. 23
·期 7
·513-524
·
IF 1.469
Wu Miao,Zhang Feimin,Yu Jiahui,Zhou Hongye,Zhang Di,Hu Chong,Huang Jin
A kind of light-curing nanocomposite resin, which consisted of reactive monomers, surface-modified TiO 2 nanoparticles and a photoinitiation system, has been developed for the application of dental restoration. It may be noted that the conjugation of glycidyl methylmethacrylate (GMA) onto the surface of TiO 2 nanoparticles (nano-TiO 2 ) contributed to improvement in miscibility between nano-filler and matrix, because the reactive C=C group of GMA participated in curing of the matrix, and hence resulted in the enhancement of mechanical properties. When the content of GMA-modified nano-TiO 2 was 2 wt%, the flexural strength and modulus of the nanocomposite resin reached 147.8 and 2918.3 MPa, respectively, which increased by 21.7 and 30.8 % in contrast to the resin without adding nano-filler. Furthermore, the polymerization shrinkage decreased after incorporating the nano-filler while the degree of monomer conversion and the water sorption for the nanocomposite resins was comparable with those of the resin without nano-filler. In conclusion, this study presented a new method, namely introduction of functional groups onto the nano-filler surface to participate in the reaction of resin monomer, to improve the interfacial adhesion and the resultant miscibility between nano-filler and resin matrix in light-curing dental nanocomposites by chemical linkage mediated with surface-modified specie. Moreover, the enhanced mechanical properties and decreased polymerization shrinkage of nanocomposite resins, which are considered the key to the effects of dental restoration, contributed a great potential as a dental material utilized for caries treatment and prevention.
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高影响因子
FIBERS AND POLYMERS
·
2022
·Vol. 23
·期 5
·1293-1299
·
IF 2.347
Yang Xue,Su Jing,Xiong Jingjing,Wang Hongbo
The superhydrophobic surface with non-wettable property has been widely explored, though, it is still a great challenge to develop an approach to construct a hierarchical roughness both on hard and soft substrates. In this study, the nano-silica with radial wrinkle structures (RWNs) was prepared via one-pot method and functionalized by Hexadecyltrimethoxysilane (CH 3 -RWNs). The coral-like morphology structure onto hard or soft substrates was created by spraying or immersion process with the ethanolic dispersion of CH 3 -RWNs. The superhydrophobic surface presented a rough coral-like morphology in Cassie-Baxter state with extremely low adhesion. The coating established a superior hydrophobicity with water contact angle (WCA) larger than 164.7°, and the low adhesion with a sliding angle (SA) below 4.13°. Besides, it also displayed excellent self-cleaning property, highly mechanical robustness, and acidic (pH 1.0)/alkaline (pH 14.0) stability. The nonfluorinated ethanolic dispersion of CH 3 -RWNs created a coral-like morphology structure on different of substrates that was promising for the construction of superhydrophobic, robust and self-cleaning surfaces.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2016
·Vol. 408
·期 17
·4661-4667
·
IF 3.125
Zhou Lizi,Yang Zhaoguang,Zhi Tiantian,Zhou Zhou,Wang Xiaochen,Ren Chunmei,Qiu Bo
Succinylacetone was known to be a toxic metabolite of tyrosine in human and animals caused by blockage of the final step in tyrosine degradation pathway, but its existence in plant was unclear though the metabolic disturbance of tyrosine was also found in plant. A GC-MS method for determination of succinylacetone in Arabidopsis thaliana was developed for the first time. Both oximation and silylation were applied in the derivation procedure, and a low-temperature condition before completion of oximation was found to be necessary to obtain good linearity of the calibration curve due to the thermolability of succinylacetone. The specific chromatogram pattern formed by the four isomers of succinylacetone derivatives provided a helpful feature for its identification. The detection limit of the proposed method was 0.25 ppm in A. thaliana . The recoveries were between 95.4 and 109.3 % with the coefficient of variation ranging from 4.36 to 7.81 % for intra-day assays and 6.47 to 8.52 % for inter-day assays. Application to wild-type and the short-day sensitive cell death 1 mutant of A. thaliana represented an obvious correlation between the measured amount of succinylacetone and wilting symptom, suggesting the proposed method could be a powerful tool in further study on toxicology of succinylacetone and tyrosine catabolism in plants.
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PubMed
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Wang Jing,Bu Yanyan,Wang Xiangfu,Seo Hyo Jin
Optical thermometry based on the up-conversion intensity ratio of thermally coupled levels of rare earth ions has been widely studied to achieve an inaccessible temperature measurement in submicron scale. In this work, a novel optical temperature sensing strategy based on the energy transfer from charge transfer bands of W-O and Eu-O to Eu 3+ -Dy 3+ ions is proposed. A series of Eu 3+ /Dy 3+ co-doped SrWO 4 is synthesized by the conventional high-temperature solid-state method. It is found that the emission spectra, emission intensity ratio of Dy 3+ (572 nm) and Eu 3+ (615 nm), fluorescence color, lifetime decay curves of Dy 3+ (572 nm) and Eu 3+ (615 nm), and relative and absolute sensitivities of Eu 3+ /Dy 3+ co-doped SrWO 4 are temperature dependent under the 266 nm excitation in the temperature range from 11 K to 529 K. The emission intensity ratio of Dy 3+ (572 nm) and Eu 3+ (615 nm) ions exhibits exponentially relation to the temperature due to the different energy transfer from the charge transfer bands of W-O and Eu-O to Dy 3+ and Eu 3+ ions. In this host, the maximum relative sensitivity S r can be reached at 1.71% K −1 , being higher than those previously reported material. It opens a new route to obtain optical thermometry with high sensitivity through using down-conversion fluorescence under ultraviolet excitation.
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PubMed
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-9
·
IF 14.919
Gao Xiaoyi,Cheng Zhenxiang,Chen Zibin,Liu Yao,Meng Xiangyu,Zhang Xu,Wang Jianli,Guo Qinghu,Li Bei,Sun Huajun,Gu Qinfen,Hao Hua,Shen Qiang,Wu Jinsong,Liao Xiaozhou,Ringer Simon P.,Liu Hanxing,Zhang Lianmeng,Chen Wen,Li Fei,Zhang Shujun
(K,Na)NbO 3 based ceramics are considered to be one of the most promising lead-free ferroelectrics replacing Pb(Zr,Ti)O 3 . Despite extensive studies over the last two decades, the mechanism for the enhanced piezoelectricity in multi-elements doped (K,Na)NbO 3 ceramics has not been fully understood. Here, we combine temperature-dependent synchrotron x-ray diffraction and property measurements, atomic-scale scanning transmission electron microscopy, and first-principle and phase-field calculations to establish the dopant–structure–property relationship for multi-elements doped (K,Na)NbO 3 ceramics. Our results indicate that the dopants induced tetragonal phase and the accompanying high-density nanoscale heterostructures with low-angle polar vectors are responsible for the high dielectric and piezoelectric properties. This work explains the mechanism of the high piezoelectricity recently achieved in (K,Na)NbO 3 ceramics and provides guidance for the design of high-performance ferroelectric ceramics, which is expected to benefit numerous functional materials.
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PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 3
·763-772
·
IF 2.5
Jiang Tongzhou,Wu Fei,Ren Yurong,Qiu Jianhua,Chen Zhihui
High-entropy pyrochlore oxide (Y,Dy,Ce,Nd,La) 2 Sn 2 O 7 has been synthesized by the co-precipitation method. EDS and XPS analysis demonstrated the high-entropy structure in M 2 Sn 2 O 7 (M = Y, Dy, Ce, Nd, La) ultrafine powders, which is developed as the active material in lithium anode. The effects of different binders on the cycling performance and rate capability were discussed. Benefiting from the synergistic effects of high-entropy system and the strong intermolecular force provided by the sodium carboxymethyl cellulose (CMC) system, the optimized M 2 Sn 2 O 7 /CMC (M = Y, Dy, Ce, Nd, La) delivers a high initial discharge capacity of about 766 mAh g −1 and exhibits excellent cycle stability. A reversible capacity of 396 mAh g −1 and superior delivering retention of ~ 100% can be obtained at 100 mA g −1 after 100 cycles. Meanwhile, the capacity retention rate of 54.5% can still be reached after the cycling at various current densities from 0.05 to 1 A g −1 , demonstrating potential application prospect of the M 2 Sn 2 O 7 /CMC.
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