ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jingwen Hou,Guangkai Jin,Kangbiao Wei,Mingming Yang,Shujuan Liu,Qian Ye,Feng Zhou
The inherent chemical inertness of carbon aerogel microspheres (CAMs) limits their effectiveness in tribological applications. To address this, ionic liquids─rich in active elements─are employed as the dopant source to synthesize heteroatom (N, P)-codoped CAMs with microporous structure via a one-step pyrolysis method. The resulting N, P@CAMs-2, when added to 500SN base oil, significantly improved its tribological properties: the friction coefficient decreased to 0.107, the corresponding wear volume was reduced by 60.74%, and the load-bearing capacity increased from 150 to 300 N. Raman and X-ray photoelectron spectroscopy analyses revealed that the improved lubrication performance stems from the active participation of N and P in tribochemical reactions, leading to the formation of a stable protective film. The combined effects of adsorption, repair, and polishing contribute to substantial wear reduction.
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PubMed
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Wei Xuemei,Xu Haonan,Fang Zhengwei,Wang Kai,Cai Tao,Yu Guoqi,Shen Hualiang,Luo Yanjuan,Yan Mingming,Chen Jianhui,Shen Runpu
The rational design of highly efficient catalysts for the selective hydrodeoxygenation (HDO) of aromatic alcohols is imperative for advancing the sustainable synthesis of biofuels and high-value fine chemicals. Palladium nanoparticles (NPs) have emerged as a promising catalytic system for facilitating C–OH bond cleavage. Herein, a series of Pd NPs with uniform sizes (2.2–7.2 nm) were prepared on phosphorus-coated carbon to probe the size effect in the HDO of bio-based aromatic alcohols. A strong linear correlation was observed between the enhancement in catalytic activity and the decrease in Pd particle size, while alkane selectivity remained consistently high at 99.9%. The catalyst achieves a remarkable >99.9% yield of ethylbenzene from phenylethanol through a one-pot hydrogenation–deoxygenation pathway under mild conditions (25 °C and 10 bar H2) with a high turnover frequency (TOF) of 645 h−1. Furthermore, the catalyst demonstrates excellent generality for converting various benzyl alcohols into corresponding alkanes under identical conditions. A key finding is that a decrease in Pd particle size strengthens the metal–support interaction (MSI) with the P-containing support, resulting in electron-enriched Pd NPs. This electronic modification promotes the adsorption and activation of the C–OH bond, thereby enhancing the catalytic efficiency. This knowledge can guide the synthesis of highly active catalysts, enabling the efficient HDO of bio-based aromatic alcohols with reduced precious metal loadings.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·Vol. 142
·期 39
·e57531
·
IF 2.8
Dawei Gao,Haixiang Wang,Qiaoli Lu,Chao Ye,Wang Lili
Piezoelectric sensors are critical components in advancing smart electronic devices, offering significant potential for energy harvesting and self-powered applications in flexible and wearable technologies. Poly(vinylidene fluoride) (PVDF) and molybdenum disulfide (MoS 2 ) are recognized for their exceptional piezoelectric properties, with monolayer MoS 2 effectively enhancing the piezoelectric response. This study innovatively fabricates PVDF/MoS 2 composite films via electrospinning, directly inducing polar β -phase crystal formation in PVDF and significantly enhancing piezoelectric performance. Furthermore, PVDF micro- and nanoparticles were electrostatically deposited onto the PVDF/MoS 2 films, resulting in a P-PVDF/MoS 2 composite with enhanced mechanical and piezoelectric properties. Under a mechanical force of 3 N at 2 Hz, the fabricated sensor achieved an output voltage of 5 V, a short-circuit current of 0.08 μA, and a power density of 3.5 mW/m 2 , representing increases of 552% in voltage, 33% in current, and 192% in power density compared to pure PVDF sensors. The highly flexible composite demonstrates significant potential as a wearable self-powered sensor and energy harvester, addressing applications in artificial intelligence and wireless technologies.
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Bioengineered
·
2021
·
IF 3.269
Na Li,Xueyuan Guo,Rui Li,Jian Zhou,Fangfang Yu,Xianliang Yan
Macrophage infiltration is a hallmark pathological change observed in early stage myocardial ischemia/reperfusion (MI/R) injury and one of the main causes of myocardial damage. Here, we investigated the effects of p-Coumaric acid (p-CA) on macrophage polarization following MI/R injury and its mechanisms. In vitro, p-CA decreases the expression of LPS/IFN-γ-induced M1 macrophage markers (TNF-α, IL-6, iNOS and CCL2) and increases IL-4-induced M2 macrophage markers (IL-10, CD206, Arg1 and Mrc) in mouse bone marrow-derived macrophages (BMDMs). Additionally, p-CA elevated indoleamine 2, 3-dioxygenase (IDO) protein expression levels, M2 macrophage polarization and M2 macrophage markers through IL-4. In contrast, repression of IDO attenuated p-CA functions regulating BMDMs through IL-4. In vivo, IDO expression was downregulated in mouse hearts subjected to MI/R injury. Treatment of p-CA increased IDO expression in the hearts of MI/R mice. Functionally, p-CA decreases M1 macrophage markers, the number of M1 macrophages and inflammation around heart tissue following MI/R injury. Importantly, p-CA reduces cardiomyocyte apoptosis caused by MI/R. Altogether, our study identified that p-CA modulates macrophage polarization by promoting IDO expression and that p-CA attenuates macrophage-mediated inflammation following MI/R by promoting M2 macrophage polarization through IDO.
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PubMed
高影响因子
FOOD CONTROL
·
2021
·
IF 5.548
Ying Lin,Ran Huang,Xiuxiu Sun,Xi Yu,Ying Xiao,Ling Wang,Wenzhong Hu,Tian Zhong
In order to develop a biodegradable agent for food preservation, β-cyclodextrin (β-CD) inclusion complexes containing p -Anisaldehyde (PAA) were prepared using co-precipitation method. Physical properties including moisture content, bulk density, hygroscopicity, entrapment efficiency and loading capacity of the inclusion complexes showed considerable results for food applications. SEM and particle size test showed notably difference between the prepared inclusion complexes and the other formulations including the raw β-CD, physical mixture, and the recrystallized β-CD in both shape and size distribution. FTIR , XRD, TGA and DTA were also carried out and confirmed the formation of inclusion complexes and inhibition of the volatility of encapsulated PAA. As a potential preservation agent, inclusion complexes demonstrated a sustained released behavior in phosphate buffer saline (PBS). Comparing with pure PAA, the inclusion complexes presented a better storage stability in low humidity environment, a higher antioxidant activity , and equal MICs against Escherichia coli and Staphylococcus aureus .
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ACS Applied Polymer Materials
·
2024
·
IF 4.4
Bowen Zhang,Yiqi Zhang,Jiufu Zhu,Zhanchen Cui,Wei Wang,Zuosen Shi
High performance polymeric dielectrics are of critical importance for obtaining high carrier mobility and realizing low operating voltage in OTFTs. In this work, copolymers poly(methyl methacrylate) containing 4-fluorostyrene monomer were used as insulating layers for OTFTs devices of C10-DNTT. With the increase of 4-fluorostyrene, the threshold voltage shifted positively, and the random copolymer poly(4-fluorostyrene–methyl methacrylate–glycidyl methacrylate)-5 (P(FSt-co-MMA-co-GMA)-5) exhibited a threshold voltage lower to 1.8 V, a hole mobility of up to 0.518 cm2 V–1 s–1, and a dielectric constant value of 5.66. XRD spectra reveal that C10-DNTT has the best morphology at (001) peak as the dielectric copolymer contains 5% 4-fluorostyrene monomer.
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ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Xiaorong Gan,Huimin Zhao,Xie Quan,Yaobin Zhang
An ultrasensitive electrochemical sensor for Cu 2+ detection was first developed based on p-aminothiophenol (PATP) anchored on the surface of Au nanoparticle-decorated hydrogen-incorporated TiS 2 nanosheets (PATP/Au-H x TiS 2 ). In the synthesis process, the plane edges of H x TiS 2 nanosheets offered Au nanoparticles with incubation sites for the heterogeneous nucleation and growth. On the other hand, Au nanoparticles were not only served as an excellent electrical catalyst to facilitate electron transfer and as a substrate for loading PATP molecules by Au-S valent bonds, but also could effectively avoid the aggregation of H x TiS 2 nanosheets . Due to the synergetic effects from Au-H x TiS 2 for signal amplification, the as-formed electrochemical sensor exhibited highly sensitive and selective assaying of Cu 2+ with a detection limit of 90 pM (3σ) and a linear range from 0.2 nM to 5 μM, under optimal conditions. Its specificity was ascribed to the strong coordination interaction between Cu 2+ and N atoms of imine moieties in PATP after electrochemical oxidation .
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Zhe Su,Shunyan Ning,Zengyuan Li,Shichang Zhang
A silica-polymer-based adsorbent ( iso Pentyl-BTBP/SiO 2 -P) was prepared via a vacuum impregnation method for efficient and continuous separation of palladium from complex systems. The results revealed that the distribution coefficient ( K d ) value of iso Pentyl-BTBP/SiO 2 -P toward Pd in 3 M HNO 3 solution was 5226 mL/g, with a maximum adsorption capacity of 31.7 mg/g. Besides, iso Pentyl-BTBP/SiO 2 -P exhibited a superior adsorption selectivity toward Pd to the other 14 coexisting interfering fission product ions, with the separation factor SF Pd/M value over 433 in 0.1–6 M HNO 3 solution. Moreover, column experiments results demonstrated that iso Pentyl-BTBP/SiO 2 -P can efficiently separate Pd with approximately 100% recovery, from simulated high level liquid waste (HLLW) solutions with multiple competing ions. Finally, X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy analysis results revealed strong interactions between nitrogen-containing functional groups (C-N C) and Pd throughout the adsorption process , wherein the NO 3 − acting as the counterions to balance the charge. In conclusion, iso Pentyl-BTBP/SiO 2 -P has shown promising applications for effectively separating Pd from multi-component and highly acidic environments.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Jiqiong Lian,Yihui Wu,Houan Zhang,Siyong Gu,Zhiwei Zeng,Xiaoyun Ye
Design of inexpensive and highly efficient bifunctional electrocatalyst is paramount for overall water splitting . In this study, amorphous Ni–Fe–P alloy was successfully synthesized by one-step direct-current electrodeposition method. The performance of Ni–Fe–P alloy as a bifunctional electrocatalyst toward both hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) was evaluated in 30 wt% KOH solution. It was found that Ni–Fe–P alloy exhibits excellent HER and OER performances, which delivers a current density of 10 mA cm −2 at overpotential of ∼335 mV for HER and ∼309 mV for OER with Tafel slopes of 63.7 and 79.4 mV dec −1 , respectively. Moreover, the electrolyzer only needs a cell voltage of ∼1.62 V to achieve 10 mA cm −2 for overall water splitting. The excellent electrocatalytic performance of Ni–Fe–P alloy is attributed to its electrochemically active constituents, amorphous structure, and the conductive Cu Foil.
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高影响因子
Industrial Chemistry & Materials
·
2023
·Vol. 2
·期 1
·141-153
·
IF 0
Yiman Gu,Yanchao Zhang,Zhe Wang,Di Liu,Yan Wang,Tianming Dong,Song Wang,Zhanyu Li,Jingyi Wu,Yijia Lei
Research on anion exchange membrane fuel cells (AEMFCs) mainly focuses on the membrane module, and improving its performance has always been the focus of researchers. To create high-performance anion exchange membranes (AEMs), a series of side chain type AEMs were prepared by introducing different proportions of side chains containing anisotropic poly cations with relatively stable piperidinium ring cations and side quaternary ammonium cations as cation groups, using poly(p-terphenyl isatin) (PTI), a main chain polymer without aryl ether bonds. The dense surface of the PTI-N-n series membranes is shown by SEM images; TEM images show that the ion domains are clearly distributed in the membrane, so a continuous ion transport channel is constructed. PTI-N-100 has the highest hydroxide conductivity at 80 °C, reaching 96.83 mS cm−1 due to multiple transport sites. The PTI-N-100 membrane has a peak power density of 180 mW cm−2 based on the highest ionic conductivity. Therefore, we believe that the introduction of multi-cations contributes to the performance of anion exchange membranes.
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DOI
Energies
·
2024
·Vol. 17
·期 2
·406
·
IF 3
Musa Abubakar Bilya,Aleksey Nabok,Yashodhan P. Purandare,Ashfaque E. Alam,I. M. Dharmadasa
In this study, a two-electrode electrodeposition technique was employed to grow thin films of antimony selenide (Sb2Se3) on glass/fluorine-doped tin oxide (FTO) substrates. The highest quality thin films were consistently obtained within the range of 1600 mV to 1950 mV. Subsequent electrodeposition experiments were conducted at discrete voltages to produce various layers of thin films. Photoelectrochemical cell (PEC) measurements were performed to characterize the semiconductor material layers, leading to the identification of both p-Type and n-Type conductivity types. Optical absorption spectroscopic analysis revealed energy bandgap values ranging from 1.10 eV to 1.90 eV for AD-deposited Sb2Se3samples and 1.08 eV to 1.68 eV for heat-treated Sb2Se3samples, confirming the semiconducting nature of the Sb2Se3material. Additionally, other characterization techniques, including X-ray diffraction analysis, reveal that the AD-deposited layers are almost amorphous, and heat treatment shows that the material is within the orthorhombic crystalline system. Heat-treated layers grown at ~1740 mV showed highly crystalline material with a bandgap nearing the bulk bandgap of Sb2Se3. Raman spectroscopy identified vibrational modes specific to the Sb2Se3phase, further confirming its crystallinity. To explore the thin-film morphology, Scanning Electron Microscopy (SEM) was employed, revealing uniformly deposited material composed of grains of varying sizes at different voltages. Energy Dispersive X-ray analysis (EDX) confirmed the presence of antimony and selenium in the material layers.
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Catalysts
·
2019
·Vol. 9
·期 2
·114
·
IF 3.444
Ke Yu,Yan Lin,Jinchen Fan,Qiaoxia Li,Penghui Shi,Qunjie Xu,Yulin Min
Ethanol oxidation reaction (EOR) is an important electrode reaction in ethanol fuel cells. However, there are many problems with commercial ethanol oxidation electrocatalysts today, such as poor durability, poor anti-CO poisoning ability, and low selectivity for C–C bond cleavage. Therefore, it is very meaningful to develop a high-performance EOR catalyst. Herein, we designed ternary N, S, and P-doped hollow carbon spheres (C–N,P,S) from polyphosphazene (PCCP) as Pd supports for EOR. Using SiO2spheres as the templates, the PCCP was first coated on the surfaces of SiO2spheres by in situ polymerization. Through high-temperature pyrolysis and hydrofluoric acid-etching, the hollow PCCP has a large surface area and porous structure. After loading Pd nanoparticles (NPs), the Pd/C–N, P, S catalysts with Pd NPs decorated on the surfaces of C–N, P, S can achieve a high mass peak current density of 1686 mA mgPd−1, which was 2.8 times greater than that of Pd/C. Meanwhile, the Pd/C–N, P, S catalyst also shows a better stability than that of Pd/C after a durability test of 3600s.
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