Nano Energy
·
2024
·
IF 16.8
Jinwei Chen,Yuxuan Liu,Fanbo Meng,Shiman He,Jun Liu,Yujun Zhao,Kaiqiang Song,Renzong Hu,Min Zhu
Subzero temperature severely forbids the transfer of lithium ion (Li + ) between electrodes and the diffusion of Li + in interphase, which become one of the slowest steps. Especially in silicon-based battery systems, the continuous thickening and poor ionic conductivity of interface make this challenge more prominent. Maintaining a thin interface with superior ionic conductivity is an effective strategy to develop low temperature silicon-based batteries. Herein, a ternary hybrid solid electrolyte interface containing F, N, S was constructed by electrolyte design to improve Li + interface transport kinetics. Benefited from robust mechanical property of inorganics and high ionic conductivity of Li 3 N and Li x SO y , the hybrid interface sustains a thin thickness over cycles and behaves significantly reduced energy barrier for Li + diffusion. Thus, such interface enables Si-C||LCO pouch cell to maintain a high capacity retention of 56.4 % of the room-temperature capacity at −30℃, and retain 87.4 % of the capacity after 200 cycles. Even at −40℃ and a high loading of 3mAh/cm 2 , the cell can still be charged and provide a specific capacity of about 310 mAh/g with almost no capacity attenuation after 50 cycles. This work demonstrates the important role of excellent interface for low temperature silicon-based batteries, and provides a reference for the design of rapid Li + transport interface.
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FUEL
·
2025
·
IF 7.5
Caitao Chen,Juan Ma,Yakun Tang,Xiaohui Li,Guangbo Liu,Hanyao Song,Yingluo He,Noritatsu Tsubaki,Lang Liu,Ting Liu
Cleaving the aromatic ether C-O bonds of lignite through catalytic hydroconversion (CHC) presents a significant challenge for producing organic chemicals and clean liquid fuels, which are vital for a sustainable future. In this study, we employed a sacrificial template-self-recovery strategy to synthesize highly dispersed and carbon-coated bimetallic catalysts MCo/C (M = Fe, Cu, Ni) for the CHC of Naomaohu coal (NMHC) and lignite-related model compounds (LRMCs). The carbon-coated NiCo bimetallic alloy catalysts, benefiting from the high dispersity of the active components and the synergistic effect between Ni and Co, exhibited excellent hydrogenolysis activity towards diphenyl ether (DPE). DPE conversion reached 100 % over Ni 3 Co 1 /C under optimal conditions (120 °C, 2 MPa H 2 , 2 h). Moreover, Ni 3 Co 1 /C significantly increased the content of arenes and alkanes while reducing the content of oxygen-containing compounds in the NMHC soluble portion (SP), demonstrating its efficient catalytic hydrogenolysis and hydrodeoxygenation capabilities. Density Functional Theory (DFT) calculations revealed that the Ni 3 Co 1 /C catalyst could activate H 2 to generate hydrogen radicals and diatomic active hydrogen, which are the primary hydrogen species involved in the reaction and affect the CHC of DPE. The experimental results can provide a reference for the conversion of lignite into clean liquid fuels.
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Analytical Methods
·
2024
·
IF 2.7
Shouhui Chen,Dan Zhou,Qinghao Xiong,Yinan Yang,Mingyang Zhang,Shoulin Chen
Nowadays, many people are turning to medications that can help them stay calm during surgeries and their daily lives. As an anesthetic that reduces the excitability of nerve cells, propofol can achieve sedative with the advantages of fast onset and short half-life. The development of propofol sensors has tremendous application potential because they can help healthcare professionals dynamically regulate the concentration of propofol in the blood, not only to achieve painless surgeries that patients want, to maintain the sedation that surgeons desire, but also to prevent the respiratory failure that may occur during the patient's daily sleep aids. In this paper, we prepared Fe3O4/C/CB nanocomposites by doping carbon black on the surface of the pyrolyzed product of MIL-88B. The nanocomposites-modified glassy carbon electrodes were used to detect propofol in phosphate buffer solution. The porous nanocomposites with high electrical conductivity promoted the charge transfer on the electrode surface, improving the performance of the modified electrodes. After optimization, the linear range, the detection limit, and the sensitivity for propofol were 5.0~205 μM, 0.102 μM, and 2.850 μA cm-2 μM-1, respectively. The electrochemical sensing of propofol in medical propofol emulsion injection and normal human serum showed that the method was rapid and repeatable.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 18
·9771
·
IF 4.9
Ruodong Huang,Zhenbo Liu,Xinlin Jiang,Junqi Huang,Ping Zhou,Zongxia Mou,Dong Ma,Xin Cui
The low-cost daily monitoring of C-reactive protein (CRP) levels is crucial for screening acute inflammation or infections as well as managing chronic inflammatory diseases. In this study, we synthesized novel 2-Methacryloyloxy ethyl phosphorylcholine (MPC)-based biomimetic nanoparticles with a large surface area to develop a visual CRP-quantification assay using affordable glass capillaries. The PMPC nanoparticles, synthesized via reflux precipitation polymerization, demonstrated multivalent binding capabilities, enabling rapid and specific CRP capture. In the presence of CRP, PMPC nanoparticles formed sandwich structures with magnetic nanoparticles functionalized with CRP antibodies, thereby enhancing detection sensitivity and specificity. These sandwich complexes were magnetically accumulated into visible and quantifiable stacks within the glass capillaries, allowing for the rapid, sensitive, and specific quantification of CRP concentrations with a detection limit of 57.5 pg/mL and a range spanning from 0 to 5000 ng/mL. The proposed visual distance-based capillary biosensor shows great potential in routine clinical diagnosis as well as point-of-care testing (POCT) in resource-limited settings.
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CORROSION SCIENCE
·
2025
·
IF 8.5
Huan Guo,Bingzhu Wang,Ruifeng Li,Cheng Su,Jixiang Dai,Yong She,Yongzhong Zhao,Jianjun Sha
Aiming at forming a stable ablation layer for hafnium-based ultrahigh-temperature ceramics under ablation environment, in this work, the Ta-based ceramic was introduced into the Hf-based ceramic, and the effect of Hf/Ta molar ratios on the ablation response behavior and mechanism of (Hf, Ta)B 2 -(Hf, Ta)C-SiC ceramics was investigated. It was found that the introduction of Ta could form a continuous and dense ablation layer. When Hf/Ta= 0.9:0.1, the ceramic composite presented excellent ablation resistance, and the linear ablation rate was −0.083 μm/s, which was only 5.85 % of that of Hf-based ceramics (HfB 2 -HfC-SiC). The excellent ablation resistance attributed to that the ablation products (Ta 2 O 5 and Hf 6 Ta 2 O 17 ) could strongly bonded to the substrate, which was conducive to enhance the stability of the ablation layer.
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APPLIED ORGANOMETALLIC CHEMISTRY
·
2012
·Vol. 26
·期 9
·478-482
·
IF 2.061
Wenyi Chu,Xinmin Li,Yanjun Hou,Hua Wang,Hongyu Li,Xiaobin Yuan,Zhizhong Sun
Pd/C-catalyzed Suzuki–Miyaura cross-coupling between aryl bromides and arylboronic acids in 50% methanol aqueous solution proceeded smoothly in the presence of 18-crown-6. Various aryl bromides bearing electron-withdrawing groups and electron-donating groups coupled with arylboronic acid in high yields. In addition, the catalyst could be recycled five times without loss of activity. Copyright © 2012 John Wiley & Sons, Ltd.
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CATALYSIS LETTERS
·
2024
·
IF 2.3
Xu Chao,Hou Jingting,Tang Zeming,Lai Qingxue,Liang Yanyu
Iron–nitrogen co-doped carbon (Fe/N/C) catalysts derived from zinc-based zeolite imidazole frameworks (ZIF-8) have been ideal alternatives to platinum group metals (PGM) and shown great potential to catalyze oxygen reduction reaction (ORR). Unfortunately, the ORR performance is seriously suppressed by the insufficient density and accessibility of the electrochemical active Fe–N sites. The precise regulation of ZIF-8 to the formation of Fe/N/C catalysts with the desired Fe–N sites for ORR is a critical challenge. Herein, a citric acid assisted reconstitution strategy is proposed to design Fe doped ZIF-8 frameworks and construct multi-dimensional Fe/N/C catalysts composed of inner concave and entangled carbon nanotubes outer moieties for efficient acid-resistant ORR reaction. The introduction of citric acid imparts Fe/N/C catalysts with dense accessible active sites and highly opened multi-dimensional mass transfer pathways. Therefore, the optimized Fe/N/C catalysts dominant half-wave potential of 0.785 V and great acid stability were obtained in 0.5 M H 2 SO 4 with a high number of transferred electrons and a low yield of H 2 O 2 ( \(\overline{{\text{n}}}\) = 3.97 and average yield = 4%). This work provides a novel and feasible approach to design and tailoring of Fe/N/C catalysts with improved distribution density and accessibility of the Fe–N active sites. Graphical Abstract
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xiaoyu Zhang,Jianming Xu,Zhiwen Chen,Guanyao Zhu,Aixiang Wei,Dihu Chen
Since wearable pressure sensors have promising applications in the fields of human physiological signal detection and bionic robots, there is an urgent need for wearable pressure sensors with comprehensive attributes such as high sensitivity and wide detection range. Here, we introduce a facile electrospinning process to fabricate a film composed of thermoplastic polyurethane/carboxyl multiwalled carbon nanotube/V 2 CT X -MXene (TPU/c-MWCNTs/V 2 C). This film has high sensitivity and great linearity, designed for flexible piezoresistive sensors. To further enhance sensor performance, we applied a spin-coating of polydimethylsiloxane (PDMS) on the sandpaper surface to create a top substrate with intermittent spinosum structures. Additionally, a layer of TPU fibers was electrospun between the conductive film and the interdigitated electrodes. The assembled components form a flexible piezoresistive sensor with a wide detection range of 0–200 kPa, a high sensitivity of 545.2 kPa −1 , a low detection limit of 5 Pa, a short response time of 48 ms, and excellent long-term durability after 7000 loading/unloading cycles, making the piezoresistive sensor highly discriminating for detecting complex human movements. Thanks to the great sensing performance and stable structure, we conducted various demonstrations to capture human physiological signals, including signals of muscle activity and pulse. These findings indicate the potential of the designed flexible pressure sensor for applications in electronic skin and smart devices.
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ADVANCED MATERIALS
·
2024
·Vol. 36
·期 25
·2400656
·
IF 27.4
Hanchen Wang,Yingtian Liu,Mingze Jiang,Yu-Xing Yao,Chunhua Hu,Chong Yan,Qiang Zhang,Luming Li
The advanced lithium-ion batteries that can tolerate zero-volt storage (ZVS) are in high demand for implantable medical devices and spacecraft. However, ZVS can raise the anode potential, leading to Cu current collector dissolution and solid-electrolyte interphase (SEI) degradation, especially at 37 °C. In this contribution, by quantitatively regulating the dosage of Li 6 CoO 4 cathode additives, controllable potential of the working anode under abusive-discharge conditions is demonstrated. The addition of Li 6 CoO 4 keeps zero-crossing potential (ZCP) and the potential of ZVS below 2.0 V (vs Li/Li + ) for LiCoO 2 |mesocarbon microbead cells at 37 °C. The capacity retention ratio (CRR) increases from 69.1% and 35.9% to 98.6% and 90.8% after 10 and 20 days of ZVS, respectively. The Cu dissolution and SEI degradation are effectively suppressed, while the over-lithiated cathode exhibits high reversible capacity after ZVS. The limiting conditions of long-term ZVS are further explored and a corresponding guide map is designed. When quantitatively regulating ZCP and the potential in ZVS, Cu dissolution, SEI degradation, and irreversible conversion of the cathode constitute the limiting conditions. This contribution designs the most reasonable potential range for ZVS protection at 37 °C, and realizes the best CRR record through precise potential regulation for the first time.
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Analytical Methods
·
2024
·
IF 2.7
Honglin Qin,Ruozhu Xu,Lizhen Qiao,Xupeng Zhai,Peixin Guo,Chen Li,Bingyan Han
The widespread use of endocrine disruptors (EDPs) has certain potential hazards to organisms and environments, and it is particularly important to develop effective pretreatment methods before detection of EDPs in complex samples. In this work, a novel magnetic nanocomposite decorated with layered double hydroxides (LDHs) and carbon dots (CDs) was designed and prepared for magnetic solid-phase extraction (MSPE) of EDPs (bisphenol S, bisphenol F, bisphenol A, bisphenol AF, diethylstilbestrol and 4-cumylphenol) combined with high-performance liquid chromatography-ultraviolet (HPLC-UV) detection. The prepared composites were characterized by field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), and the adsorption mechanism towards these EDPs might be mainly based on hydrogen bonds and π–π conjugation. Under the optimized conditions, the proposed method showed limits of detection within 0.05–0.50 μg L−1 and limits of quantitation within 0.2–2.0 μg L−1, and good linearity (R2 ≥ 0.9975) was presented in the range of 0.2–200 μg L−1. Finally, the Fe3O4@C@NiCo-LDH@CDs composite-based MSPE-HPLC-UV method was applied for enrichment and determination of EDPs in water, milk, and tea beverage samples with recoveries in the range of 81.2–119.8% and relative standard deviations below 9.7%.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Guangchao Li,Youbin Zheng,Hao Guo,Ze Li,Guohao Zhu,Liang Dong,Xin Liu,Jianbing Zang
In this paper, we present a method to enhance the stability of Fe–N–C electrocatalysts, known for their significant oxygen reduction reaction (ORR) activity and positioned as promising alternatives to commercial noble metal-based catalysts. Despite the favorable ORR activity, Fe–N–C suffers from inadequate stability in acidic media, primarily attributed the loss of active FeN 4 sites resulted from Fe-demetalation. However, recent investigation reveals that pyridine N exhibits remarkable stability in retaining Fe atoms. To address this, we achieved a high proportion of pyridine N doping in carbon nanofibers through a process involving nano-SiO 2 shell coating and electrospinning. The nano-SiO 2 shell coating method demonstrates efficacy and versatility in transforming pyrrole-type FeN 4 into pyridine-type FeN 4 , irrespective of the origin material being trivalent or divalent Fe, whether organic or inorganic.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Fang Kou,Weihao Wang,Sangguan You,Xuetuan Wei,Xian Wu
A novel encapsulation system was designed, utilizing sodium alginate (SA) polysaccharide as the matrix and easily absorbed Fe 2+ as the metal-organic framework, to construct microbead scaffolds with both high catechins (CA) and vitamin C (Vc) loading and antioxidant properties. The structure of microbead hydrocolloids was investigated using SEM, XPS, FTIR, XRD and thermogravimetry, and the antioxidant activity , in vitro digestion and the release of CA and Vc were evaluated. These results revealed that the microbead hydrocolloids SA-CA-Fe and SA-CA-Vc-Fe exhibited denser and stronger cross-linking structures, and the formation of inter- and intramolecular hydrogen and coordination bonds improved thermal stability . Moreover, SA-CA-Fe (44.9 % DPPH and 47.8 % ABTS) and SA-CA-Vc-Fe (89.9 % DPPH and 89.3 % ABTS) displayed strong antioxidant activity . Importantly, they were non-toxic in Caco2 cells. The SA-CA-Fe and SA-CA-Vc-Fe achieved significantly higher CA (56.9 and 62.7 %, respectively) and Vc (42.2 %) encapsulation efficiency while maintaining higher CA and Vc release in small intestinal environment. These results suggested that SA polysaccharide-based encapsulation system using Fe 2+ framework as scaffold had greater potential for delivery and controlled release of CA and Vc than conventional hydrocolloids, which could provide new insights into the construction of high loading, safe, targeted polyphenol delivery system.
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