ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yuwen Zhu,Shihang Guo,Jianqiu Zhu,Peng Du,Jie Pu,Linjuan Zhang,Donglin Han
Protonic ceramic fuel cells (PCFCs) are a promising hydrogen economy-oriented technique for energy conversion, but the performance of cathodes needs to be improved due to the sluggish oxygen reduction reaction kinetics. Post-annealing the AgNO 3 solution-infiltrated La 2 NiO 4+δ (LNO) backbones leads to the formation of Ag nanoparticles-decorated LNO composite cathodes, with the oxygen adsorption ability enhanced significantly at the interface between Ag and LNO. Although the acidity of the AgNO 3 solution results in a negative etching effect, it is compensated or even overcome by the enhanced catalytic activity by generating Ag nanoparticles on the surface of LNO. Notably, LNO loaded with 1 wt% Ag achieves the optimal balance, showing the lowest polarization resistance of 0.25 Ωcm 2 at 650 °C, more than five times lower than 1.28 Ωcm 2 for the bare LNO.
研究领域:
材料科学
·
电化学
·
能源材料
·
固体氧化物电化学
·
纳米催化
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Anran Fu,Yunfu Ou,Juan Li,Yunxiao Zhang,Dongliang Shen,Zhen Wang,Zhengyan Chen,Dongsheng Mao
This study investigates the interlaminar toughening of bismaleimide/carbon fiber (BMI/CF) composite laminates using modified carbon nanotubes (CNTs) deposited via spray coating technology. Pristine CNTs were functionalized through chemical modification (grafting 5-aminoisophthalic acid small molecules to yield CNT-COOH) and physical modification (coating with a layer of polydopamine to produce CNT@PDA) to enhance dispersion within the composite matrix. While both modification methods improved the dispersion of CNTs, their thermal stabilities during composite molding led to contrasting toughening outcomes. Chemically grafted CNT-COOH demonstrated superior performance, achieving a 20 % increase in mode I fracture toughness (G IC ) and a 32.37 % increase in mode II fracture toughness (G IIC ). In contrast, physically coated CNT@PDA exhibited reduced toughening efficacy compared to the baseline in both mode I and mode II fracture toughness. This can be attributed to the poorer thermal stability of the physically coated CNT@PDA than that of chemically grafted CNT-COOH. On one hand, the coating material PDA itself has poor thermal stability which is highly prone to decomposition during high-temperature molding. On the other hand, it can be influenced by the methods of CNT modification. The bonding mechanisms of chemical grafting (covalent bonds) and physical coating (van der Waals forces and other physical interactions) differ, leading to varying stability under high temperatures. The decomposition of the coating material and the high-temperature failure of van der Waals forces diminished surface functional groups and introduced defects around the CNTs, significantly compromising interlaminar fracture toughness. The findings underscore the critical role of thermal stability in determining the effectiveness of nanomodification strategies for advanced composite materials.
研究领域:
材料科学
·
复合材料界面工程
·
纳米材料改性
·
高分子基复合材料
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Chenyang Zhang,Xuewei Zhang,Xuerui Yang,Guangli Xiu,JM CHOVELON,Lei Zhou
The photochemical behaviors of fungicides under irradiation differ significantly between leaf surfaces and aqueous solutions. However, few studies have compared the photolysis of fungicides between these two environmental media. In this study, three typical fungicides—kresoxim-methyl (KM), pyraclostrobin (PAS), and cyprodinil (CRL)—were examined using carnauba wax to simulate leaf surfaces The photolysis kinetics, products, and pathways were systematically compared between aqueous solutions and wax films. On wax film, the photolysis rate constants of selected fungicides were observed to be significantly faster than in aqueous solution, with increases of 44, 5 and 36-fold for KM, PAS and CRL, respectively. The primary photolysis pathways on wax films involved photoisomerization and ether cleavage; while the hydroxylation process, commonly observed in aqueous systems, was absent. Toxicity assessments demonstrated that photolysis effectively reduced their ecotoxicities in both systems, with the photolysis on wax film documented as a more profound detoxification process. Moreover, wax film thickness and pesticide additives significantly influenced photodegradation kinetics of all the three fungicides. The present study highlighted the significant influence of environmental media on the photodegradation pathways of pesticides.
研究领域:
环境科学
·
农药化学
✓ 已验证
产品关联
DOI
高影响因子
PHYSIOLOGY & BEHAVIOR
·
2026
·
IF 2.7
Jiaying Wu,Ya Ye,Cao Wang,Guo Feng
Olfactory cues, processed via direct limbic connections, can strongly modulate affective states, yet their influence on complex decisions like intertemporal choice (involving trade-offs between immediate and delayed outcomes) remains underexplored. Grounded in hyperbolic discounting models, this study employed a within-subjects design to systematically investigate the impact of olfactory emotional valence on temporal discounting behavior. Forty-four participants performed an intertemporal choice task under pleasant (sweet orange essential oil) and unpleasant (valeric acid) odor conditions, alongside a neutral (propylene glycol) control. Analysis of variance confirmed the sign effect within the gain-loss framework. The findings indicate that unpleasant odors consistently increase decision impulsivity relative to pleasant and neutral odors. Critically, interaction analyses revealed a strong situational dependency: the impulsivity-enhancing effect of unpleasant odors was statistically significant only under gain-frame conditions. Results from linear mixed-effects models illustrated dynamic modulation by task sequence. In the gain context, both the influence of odor valence on reaction time (RT) and the relationship between discount rate (k) and RT varied with task sequence. Under loss conditions, the effect of odor valence and its interaction with k were markedly sequence-dependent, with unpleasant odors exhibiting a non-linear, increasing influence across successive trials. This research reveals a context-specific mechanism by which olfactory emotions shape intertemporal choice, offering novel insights into the environmental sensory modulation of decision-making.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2023
·Vol. 10
·期 20
·2207250
·
IF 15.1
Xue Bai,Mengyao She,Yali Ji,Zhe Zhang,Wenhua Xue,Enzhou Liu,Kerou Wan,Ping Liu,Shengyong Zhang,Jianli Li
Photocatalysis is an important technique for synthetic transformations. However, little attention has been paid to light-driven synergistic redox reactions for directed synthesis. Herein, the authors report tunable oxidation of benzyl to phenylcarbinol with the modest yield (47%) in 5 h via singlet oxygen ( 1 O 2 ) and proton-coupled electron transfer (PCET) over the photocatalyst Zn 0.5 Cd 0.5 S (ZCS)/graphene oxide (GO) under exceptionally mild conditions. Theoretical calculations indicate that the presence of S vacancies on the surface of ZCS/GO photocatalyst is crucial for the adsorption and activation of O 2 , successively generating the superoxide radical ( • O 2 − ) and 1 O 2 , attributing to the regulation of local electron density on the surface of ZCS/GO and photogenerated holes (h + ). Meanwhile, accelerated transfer of photogenerated electrons (e − ) to GO caused by the π – π stacking effect is conducive to the subsequent aldehyde hydrogenation to benzyl alcohol rather than non-selective oxidation of aldehyde to carboxylic acid. Anisotropic charge transport driven by the built-in electric field can further promote the separation of e − and h + for multistep reactions. Promisingly, one-pot photocatalytic conversion of p -xylene to 4-methylbenzyl alcohol is beneficial for reducing the harmful effects of aromatics on human health. Furthermore, this study provides novel insights into the design of photocatalysts for cascade reactions.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 18
·3782
·
IF 5
Fei Wu,Jianfeng Gao,Yang Xiang,Jianming Yang
The rapid and effective fabrication of polyvinyl alcohol (PVA) hydrogels with good mechanical properties is of great significance yet remains a huge challenge. The preparation of PVA hydrogels via the conventional cyclic freeze–thaw method is intricate and time-intensive. In this study, a pioneering approach involving the utilization of low-temperature continuous freezing is introduced to produce a novel PVA-ethylene glycol (EG) gel. Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometry (XRD) and scanning electron microscopy (SEM) confirm that with the assistance of EG, PVA molecular chains can self-assemble to generate an abundance of microcrystalline domains at low temperatures, thus improving the mechanical properties of PVA-EG gel. Remarkably, when the mass ratio of H2O/EG is 4:6, the gel’s maximum tensile strength can reach 2.5 MPa, which is much higher than that of PVA gels prepared via the freeze–thaw method. The preparation process of PVA-EG gel is simple, and its properties are excellent, which will promote the wide application of PVA tough gel in many fields.Keywords:PVA;hydrogel;mechanical properties;segment self-assembly;freeze–thaw
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yuanlu Xu,Yanling Peng,Bowen Lv,Chengwen Song,Zaijin You,Yanming Liu,Xinfei Fan
The burgeoning solar interfacial evaporation (SIE) technology reveals enormous prospect to address the global freshwater crisis, but its application might be limited by a grossly neglected problem of inorganic salt scaling. Herein, based on the carbon nanotubes (CNTs)@carbon black (CB)/polyvinyl alcohol (PVA) evaporators, the scaling behavior and its influence on the SIE performance were investigated systematically in the two typical anti-salt modes, including the edge-preferential crystallization (T-type mode) and the enhanced convection with vertically aligned vessels (EC-type mode). The results revealed that the scaling occurred easily in both modes when only Ca 2+ and SO 4 2− co-existed in the feed water. Meanwhile, in the T-type mode, the scaling aggravated the NaCl crystallization, resulting in a coverage of NaCl crystals on the whole evaporator surface. For a high salt concentration (10.0 wt% NaCl) with SI (Ca 2+ +SO 4 2− ) = −0.13, the evaporation rate seriously decreased to ∼ 12.6% of its initial value after 12 h. On the contrary, the scaling behavior was significantly suppressed in the presence of Na + and Cl − ions in the EC-type mode. Furthermore, the slight scaling presented a negligible effect on the NaCl accumulation, which ensured a stable evaporation rate of 2.58 ± 0.10 kg m −2 h −1 under the same condition (10.0 wt% NaCl and SI of −0.13) for even 12 h irradiation under 2.0 sun. Therefore, it can be emphasized that developing novel evaporators not only requires a good anti-salt ability, but also possesses an excellent resistance to scaling for the practical application of SIE in the future.
研究领域:
材料科学
·
环境科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Sun Mengyao,Han Ying,Zhang Yingying,Wang Han,Jiang Haipeng,Wang Fengyou,Fan Lin,Li Xin,Liu Xiaoyan,Wei Maobin,Liu Huilian,Yang Lili
Intrinsic defects limit the further improvement of photovoltaic performance and stability of perovskite solar cells (PSCs). Bridging symmetric molecules have been proved to be a kind of promising additive for passivating defects within perovskites. However, there is currently a lack of systematic understanding of how the geometric configuration of bridging symmetric molecules affects the modulation effect of photovoltaic performance of PSCs. Herein, the S─S bridging symmetric molecules with nitro groups were selected as additives, i.e., bis-(2-nitrophenyl)-disulfid (B2) and bis(4-nitrophenyl) disulfide (B4), which exhibit tilted N-shaped ( N ) and inverted V-shaped (Λ) configurations, respectively. Compared with N -shaped B2 molecules with S─S bridging groups hidden inside the molecular structure, Λ-shaped B4 molecules with exposed S─S bridging groups exhibit excellent defect passivation performance in perovskite films. Both experimental and theoretical results indicate that the exposed S─S bond in B4 molecule acts as a third anchoring point, optimizing the matching degree between the spacing distance of passivating group within molecules and the distance between adjacent lead ions in the perovskite lattice. Such improved geometric compatibility not only helps to improve the crystal quality but also releases the residual stress of perovskite film. Moreover, B4 modification also optimizes the band alignment so that it accelerates the charge transfer process of PSCs. As a result, the B4-based PSCs achieve a maximum power conversion efficiency of 25.43% with improved stability. This study not only lays the experimental and theoretical foundation for the rational design of bridging symmetric molecular additives, but also promotes the application of such molecules in improving the performance of various perovskite-based optoelectronic devices.
✓ 已验证
DOI
PubMed
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Yi Liu,Xiang Wu,Hui Feng,Guozhong Lu,Ying Jiang,Xiaobing Lou,Chao Li,Ming Shen,Fushan Geng,Bingwen Hu
Cation-disordered rock-salts (DRX) emerge as an intriguing class of high-capacity cathode materials , garnering significant attention in the development of advanced energy-storage systems. Fluorination strategies have been raised to regulate redox and structure for better DRX electrochemical performance . However, research on the interfacial processes during fluorinated DRX cycling remains limited. Here, we evaluate a highly fluorinated DRX, Li 2 Mn 2/3 Nb 1/3 O 2 F (LMNOF), in different electrolytes to correlate its cycling performance with distinct interfacial evolutions. During cycling in the carbonate-based electrolyte, a thick Mn-containing CEI forms on the LMNOF surface, leading to gradual capacity decay. Intriguingly, the addition of fluoroethylene carbonate (FEC) would bring about surface oxygen loss, Mn-ion dissolution and formation of a fluorinated surface layer by reacting with the LMNOF surface, which critically deteriorate the cycling performance. In comparison, the ether-based electrolyte is compatible with the LMNOF surface, resulting in a more favorable cycling stability. This work sheds light on the interfacial deterioration mechanism of LMNOF cathode in traditional carbonate-based electrolyte, emphasizing the importance of using advanced non-reactive electrolytes to enhance DRX performance.
研究领域:
材料化学
·
电化学
·
能源存储
·
锂离子电池
·
界面科学
·
固态化学
·
先进电池材料
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Qiqi Zhang,Ren Zhang,Ying Chen,Anlin Xu,Albert T. Lebedev,Yongjun Zhang
Recent studies have found the presence of surface-bound radicals (Surf-R) during the heterogeneously catalyzed peroxymonosulfate (PMS), especially when the catalyst carriers possess a high adsorption capacity. However, the effects of Surf-R on the toxicity of transformation products (TPs) are still not well elucidated. In this study, Co and Mn were loaded onto commonly used carriers: activated carbon and alumina (CoMn@AC vs CoMn@Al 2 O 3 ) to create comparable catalytic centers but distinct adsorption capacity, which was proved by material characterization (SEM, EDS, BET, XPS), adsorption and catalytic tests. Both images and quantitative analysis with 3D excitation-emission matrix fluorescence spectroscopy demonstrated that the reaction solutions of enrofloxacin from two catalysts composed differently when a same degradation efficiency was achieved. It was further found that the respiratory inhibition of CoMn@AC catalyzed samples was only 7–36% of the counterpart. 50 TPs were identified with UPLC-MS/MS, among which 31 TPs were possibly more toxic than enrofloxacin according to the calculation with the Toxicity Estimation Software Tool. CoMn@Al 2 O 3 produced 14 unique toxic TPs while CoMn@AC only 4. The analysis with EPR revealed that both catalysts generated SO 4 •- , • OH, and 1 O 2 ; quenching tests proved a lot of Surf-R with CoMn@AC but not with CoMn@Al 2 O 3 . This study demonstrates the high potential of Surf-R to enhance the detoxification of organic contaminants during PMS oxidation and thus provides a reference for designing novel catalysts to achieve efficient contaminant degradation and detoxification.
研究领域:
环境科学
·
毒理学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR RESEARCH
·
2019
·Vol. 28
·期 1
·74-81
·
IF 1.758
Wang Yuting,You Sijia,Hu Jie,Zhang Kan
Two 3-methytetrahydrophtalimide-functional benzoxazine monomers containing nitrile group have been prepared in order to achieve the basic design rules for developing high-performance thermosets via multifunctional benzoxazines. The chemical structures of the two new synthesized benzoxazine monomers have been confirmed by 1 H NMR, 13 C NMR and FT-IR. Besides, the polymerization behavior has been studied by using DSC and in situ FT-IR. In addition, the thermal stability and flame retardant properties of the resulting polybenzoxazines have also been investigated using TGA and MCC. The polybenzoxazine based on ortho -3-methytetrahydrophtalimide functional benzoxazine containing ortho -nitrile group exhibits excellent thermal stability and low flammability, with a T d 10 of 378 °C and a HRC value of 180 J/(g K).
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
·
2026
·
IF 3.1
Peng Zhu,Miaomiao Wang,Dongdong Li,Chang Liu,Zhengbo Qin,Zefeng Hua,Zhong-Fa Sun,Xinyan Yang,Xianfeng Zheng
Plasma amplification laser-induced breakdown spectroscopy (Plasma amplification LIBS) has shown great potential in N elements in water due to high sensitivity, precision, and accuracy. To further reduce interferes of the atmospheric nitrogen, the effect of laser wavelength on the quantitative determination of nitrogen in water was investigated. With short laser wavelength, stronger spectral line intensity, lower interference from atmospheric nitrogen, and superior analytical performance were obtained. The linear coefficient of determination (R²) of the calibration curve improved from 0.2147 to 0.9732, the limit of detection (LOD) was reduced from 18.98 ppm to 3.41 ppm, and the spectral stability, expressed as average relative standard deviation (RSDAV), was reduced from 10.49% to 5.45%. Moreover, the average relative error (REAV) and the root mean square error of cross-validation (RMSECV) for the predicted concentrations were improved by approximately 56.82% and 71.79%, respectively. These results demonstrate that the 532 nm wavelength in plasma amplification LIBS can significantly enhance both the detection sensitivity and the accuracy of quantitative analysis for nitrogen in water.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）