Journal of Cardiovascular Computed Tomography
·
2025
·Vol. 19
·期 5
·532-540
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IF 5.8
Jin Zheng,Xinxin Yu,Quanlin Sun,Yuan Huang,Yang Chen,Lin Gao,Ao Zhou,Jinhua Shen,Wenshan Ma,Jonathan R. Weir-McCall,Umar Sadat,Longjiang Zhang,Zhongzhao Teng,Ximing Wang
Background The selection of cardiac phase in coronary computed tomography angiography (CCTA) may affect computational fluid dynamics (CFD)-derived hemodynamic metrics; however, this influence is not well-quantified, particularly in anomalous coronary anatomies. This study aims to evaluate how cardiac phase selection impacts CFD outcomes in normal and anomalous coronary arteries. Methods Multiphase CCTA datasets were analyzed from 40 patients: 30 with systolic and diastolic reconstructions (10 inter-arterial anomalous right coronary artery [ARCA], 10 myocardial bridging [MB], 10 normal) and 10 additional normals with mid-diastolic and diastolic reconstructions. Geometric differences among phases were measured. CFD-derived parameters, including time-averaged wall shear stress (TAWSS), oscillatory shear index (OSI), relative residence time (RRT), and CCTA-derived fractional flow reserve (CT-FFR), were calculated. Phase-dependency was assessed by (i) comparing proximal right coronary artery (pRCA) and proximal left anterior descending artery (pLAD) measurements in normal systole vs. diastole and mid-diastole vs. diastole; (ii) comparing pRCA measurements in ARCA vs. normal, and pLAD measurements in MB vs. normal, for systole and diastole. Results Luminal area differences among phases in pRCA and pLAD segments demonstrated group-distance interactions (p < 0.05). Absolute relative differences in OSI were significantly smaller in pLAD for MB group (median 5.31% [IQR 2.61%–7.46%]) versus normal group (15.99% [6.23%–31.98%]; p = 0.0125). While TAWSS, OSI, and RRT exhibited phase-dependency, this was neither specific to patient cohorts nor coronary artery territories. The variation of relative differences in CT-FFR (maximum 2.4%) was generally lower than that in TAWSS (21.3%), OSI (63.9%), and RRT (28.1%), with all relative differences of the four parameters showing no significant variation from zero. Conclusion The coronary geometry showed clear phase-dependency. The phase dependency should not be ignored when CCTA is used to quantify TAWSS, OSI and RRT. Standardizing cardiac phase selection in CCTA-based CFD analyses is crucial for improving accuracy and clinical consistency.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2025
·
IF 2.6
Cao Bo-Qun,Bao Hao-Tian,Zhang Ji-Wei,Shao Gang-Qin
The lithium-phosphorus-thiohalides (LPS X ) with superionic conduction are strong candidates for the new-generation solid electrolytes (SEs) in all-solid-state lithium-ion batteries (ASSLIBs). In this work, Li 6− x PS 5− x Cl 1+ x − y Br y (LPSCB; 0 ≤ x ≤ 0.7; 0 ≤ y ≤ 1.7) was synthesized by a solid-state method in which the key raw material of Li 2 S was prepared by an improved carbothermal reduction method without late decarbonization. The lattice flexibility and the degree of structural order are opposite effect and would lead to an optimum of the ionic conductivity at a composition of LPSCB. Li 6 PS 5 Br- and Li 5.5 PS 4.5 Br 1.5 -based ASSLIBs had the best rate capacity and cycle performance in Li 6 PS 5 Cl 1− y Br y - (0 ≤ y ≤ 1) and Li 5.5 PS 4.5 Cl 1.5− y Br y -based ones (0 ≤ y ≤ 1.5), respectively. To increase the ionic conductivity of LPSCB-type SEs and capacity/cycle performance of the related ASSLIBs, Br-introduction, mutual substitution and excess- X substitution were extremely effective strategies. Graphical
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THERMOCHIMICA ACTA
·
2025
·
IF 3.5
Shuchang Zhang,Meiqian Chen,Bingyang Li,Yuelong Pan,Linjun Yang
The treatment of spent ion exchange resins (CERs) has become a major concern with the development of nuclear industry. The migration and transformation mechanism of Cs in CERs in both pyrolysis and gasification were evaluated based on chemical equilibrium and experimental analysis. The pyrolysis and gasification temperatures should be limited below 813.15 K and 873.15 K, respectively, but after adding the fixatives, ZrO 2 or Nb 2 O 5 , the temperatures could be extended to 873.15 K, 1233.15 K (ZrO 2 ) or 1153.15 K (Nb 2 O 5 ). The kinetic and thermodynamic characteristics of CERs with metal ion catalysts in the gasification were evaluated based on thermogravimetric analysis. In 10 % O 2 /90 % N 2 , Fe 2+ and Mn 2+ metal nuclides would urge the decomposition of functional groups and polymer matrices, since they could promote the reaction in the second stage and the advance of the third stage. This study could provide basic data for the thermal treatment of CERs.
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Small
·
2025
·Vol. 21
·期 33
·2504201
·
IF 12.1
Keding Chen,Xiaolong Shi,Yanghuan Shen,Bin Gou,Li Yang,Yingdong Li,Jin Gong,Yu Wang,Jingchao Chai,Yun Zheng,Wei Zhang,Zhihong Liu
The narrow electrochemical stability window (ESW) and poor thermal stability of poly(1,3-dioxolane) (PDOL) solid polymer electrolyte severely restrict its application. In this study, poly(1,3-dioxolane) dimethacrylate (PDOL-DMA) is designed and synthesized to replace the unstable terminal hydroxyl groups with unsaturated C═C double bond. The cross-linked quasi-solid electrolyte (CPDOL-DMA QSE) demonstrates a wide ESW of 4.5 V versus Li + /Li and a high Li + transference number of 0.64. This crosslinked network facilitates lithium salt dissociation, weakens Li + -polymer interactions, and achieves the reversibility of lithium metal anode disolution/deposition. For CPDOL-DMA QSE, capacity retention is 83% after the 400th cycle at 25 °C. Moreover, it can perform stable cycling with 82% retention after 200 cycles at an elevated temperature of 80 °C. Due to the high oxygen content of the repeating units in CPDOL-DMA, microcalorimetry and accelerated calorimetry results further confirm the high safety of the CPDOL-DMA QSE. This work provides insights into the design of polyether polymer electrolytes with high oxygen contents, realizing thermo-electrochemical stability in lithium metal batteries.
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CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Feng Tang,Chenmeizi Wang,Leibing Zhang,Zhengquan He,Fenglin Huang
The generation of dyeing wastewater in textile production, along with persistent cost and technological barriers, has concentrated manufacturing in regions prioritizing growth over regulation, threatening ecological integrity and industry sustainability. Here, we introduce a nanofiltration platform inspired by sand filters, using quaternized carboxy cellulose nanocrystals (FCNCs) synthesized from textile waste cotton via a rapid (60 min), high-yield (88.5 %) one-step functionalization. Combining Fe 3+ -mediated proton flux with temperature-programmed epoxy–amine chemistry enables regioselective grafting of carboxyl (–COO − ) and quaternary ammonium (–N + (CH₃)₃) groups, advancing efficiency and precision in FCNC production. Spectroscopy and DFT reveal a chain-enhanced adsorption mechanism, where cation coordination at –COO − promotes electron delocalization toward –N + (CH₃)₃, boosting anion affinity by 142 % and enabling equilibrium within 30 min. Integrated into a biomimetic sandwich-type matrix, FCNCs remove >97 % of dyes and metals with ultralow hydraulic resistance (62.2 % of conventional) and high throughput (3.5 ton·kg −1 ·h −1 ) without sludge, enabling a scalable “waste-to-treatment” process for sustainable water purification.
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Journal of Energy Chemistry
·
2025
·
IF 14.9
Yuzhen Dang,Yurong Wu,Zhe Xu,Jianxing Wang,Runguo Zheng,Zhishuang Song,Zhiyuan Wang,Xiaoping Lin,Yanguo Liu,Dan Wang
O3-type layered oxide cathodes for sodium-ion batteries are promising owing to high theoretical capacity and broad temperature adaptability, yet hindered by structural degradation and sluggish Na + diffusion kinetics. Herein, we present a sodium-deficient high-entropy layered oxide cathode (Na 0.85 Ni 0.3 Mn 0.3 Fe 0.1 Co 0.15 Ti 0.1 Cu 0.05 B 0.02 O 2 , denoted as Na0.85-HEO), combining sodium content optimization and high-entropy composition design. Incorporating six transition metals and light element boron creates a unique high-entropy configuration, effectively mitigating local lattice distortion and internal strain through chemical disorder effects, thereby enabling highly reversible phase transitions (O3-P3-O3) and smaller volume change (0.6 Å 3 ) during the initial cycle. The sodium-deficient high-entropy design effectively increases the sodium interlayer spacing to 0.322 nm, facilitating the Na + diffusion kinetics. Moreover, this high-entropy strategy enables the cathode to have a completely solid solution charge curve and significantly reduces the proportion of (O 2 ) n − , thereby suppressing gas release during the cycling process. The resultant cathode demonstrates exceptional cyclability (80% capacity retention after 400 cycles at 100 mA g −1 in a full cell), and remarkable low-temperature performance (108.6 mAh g −1 at −40 °C). This work guides the design of high-entropy electrode materials with tailored ionic transport channels for extreme-temperature energy storage applications.
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 13
·期 6
·119794
·
IF 7.2
Peng Zuo,Xianping Chu,Fanfan Liu,Xu Cai,Ruichen Li,Yanbo Sun,Zhouqin Xu,Zhiwei Zhang,Yun Shen,Jinyun Liu,Yefeng Liu
In this study, a novel strategy was developed to synthesize a defect-rich, highly dispersed N, P co-doped molybdenum-based catalyst (MoO 3 /NCG-P) by anchoring phosphomolybdic acid (PMA) clusters onto dopamine (PDA)-modified graphene oxide (GO), followed by thermal treatment. The self-polymerized PDA layer not only served as a nitrogen-rich carbon precursor but also provided abundant anchoring sites for PMA immobilization, while PMA simultaneously acted as both the Mo and P sources. Upon pyrolysis, PMA was in situ decomposed into ultrafine molybdenum trioxide (MoO 3 ) nanoparticles enriched with vacancy defects, and uniformly dispersed on N, P co-doped porous graphene sheets (NCG-P) derived from GO@PDA. This process simultaneously generated strong interfacial coupling and a high density of defect sites, facilitated electron transfer between MoO 3 and the N, P co-doped carbon matrix, endowed the catalyst with enhanced structural stability and excellent surface accessibility. Benefiting from these structural and electronic advantages, in the oxidative desulfurization (ODS) of dibenzothiophene (DBT) using H 2 O 2 as the oxidant, MoO 3 /NCG-P achieved complete removal of 4000 ppm DBT within 20 min at 60 °C, using only 0.03 g of catalyst and a H 2 O 2 /S molar ratio of 2. Furthermore, the catalyst demonstrated excellent reusability, with no significant loss of activity observed over ten consecutive cycles. Mechanistic investigations based on free radical scavenging experiments and in situ electron paramagnetic resonance analysis confirmed that the ODS process predominantly follows a hydroxyl radical-mediated oxidation pathway. These findings offer valuable insights for the design of efficient, stable, and scalable molybdenum-based catalysts for practical ODS applications.
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DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
F.N. Li,Y.Y. Ma,J.W. Zhang,H.X. Wang
This study presents a novel electrochemical approach for fabricating ethoxy terminated diamond (EtO-diamond) surfaces through high-voltage ethoxide ion treatment in ethanol. Using X-ray photoelectron spectroscopy (XPS), we systematically characterized the voltage dependent surface chemistry, revealing a two-step grafting mechanism: hydrogen abstraction by ethoxy radicals followed by covalent bond formation, as evidenced by C O and CH x peaks. The applied voltage critically governs surface composition, high voltages induced competing pathways (e.g., sp 2 carbon formation). Comparative hydrogen ion treatment enhanced CH x groups and avoided sp 2 carbon formation, indicating minimal oxidation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Chao Su,Jinpeng Cai,Hao Lai,Qifang Zheng,Peilun Shen,Dianwen Liu
Chalcopyrite and galena are significant sulfide minerals found in copper-lead (Cu-Pb) ores, drawing attention to environmentally friendly separation techniques in mineral processing . This research explored the use of calcium lignosulfonate (CLS) as a depressant to achieve efficient separation of chalcopyrite from galena under weakly alkaline conditions (pH=8–10). The adsorption behavior of CLS was analyzed using Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectroscopy (UV–vis), zeta potential measurements, and time-of-flight secondary ion mass spectrometry (ToF-SIMS). The findings revealed that CLS selectively adsorbed onto the galena surface, inhibiting the interaction between xanthate and galena. Furthermore, the results of X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations indicated that CLS chemisorbed onto the galena surface through bonding between oxygen atoms in the sulfonic acid group and lead atoms, and the process occurred spontaneously. This selective adsorption significantly increased the hydrophobicity of the galena surface, enabling chromium-free separation of chalcopyrite and galena.
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PROGRESS IN PHOTOVOLTAICS
·
2025
·Vol. 33
·期 9
·1024-1031
·
IF 7.6
Minghui Li,Jun Zhou,Xiting Lang,Xirui Liu,Hao Tian,Junchuan Zhang,Jian Liu,Yongjie Jiang,Yangyang Gou,Mengjin Yang,Jichun Ye,Chuanxiao Xiao
Potential-induced degradation (PID) presents a significant challenge to the long-term reliability of perovskite solar cells (PSCs) in commercial applications. Research on PID in PSCs is still in its early stages, and the polarization-type PID (PID-p) remains poorly understood. In this study, we used advanced microscopic techniques to investigate the underlying mechanisms of PID-p in PSCs. After 100 h of PID stress, the devices experienced severe performance loss, with efficiency reduced to 20.9% of its initial value. This degradation was primarily driven by a decrease in short-circuit current and fill factor, while the open-circuit voltage remained relatively stable. Our findings reveal that the accumulation of sodium ions at the glass/film interface triggers the formation of an electron inversion layer at the perovskite's bottom, leading to performance decline. Electrical and mechanical characterizations further confirm changes in material properties, particularly at the hole transport layer/perovskite interface, contributing to the degradation.
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COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
·
2025
·Vol. 40
·期 27
·4946-4969
·
IF 9.1
Honghu Chu,Weiwei Chen,Lu Deng
High-resolution (HR) imaging technology is increasingly employed to capture crack images in civil infrastructure, which is vital for ensuring the safety of the bridge inspection process conducted via unmanned aerial vehicles (UAVs). Such applications require the development of advanced algorithms for the segmentation of HR images. Traditional deep learning-based segmentation methods for inferencing HR images consume considerable GPU resources, which prompts the authors to draw inspiration from the cost-effective rendering technique in computer graphics and try to apply this advanced method to the refined segmentation of HR crack images. However, the original rendering method, designed to guide rendering points by the coarse segmentation masks, often inadequately directs rendering points towards the crucial boundary areas of tiny cracks, leading to unclear or missing boundary predictions. To address this, an innovative rendering technique was proposed, utilizing probability maps to precisely direct rendering points towards crack boundaries and tiny-crack branches during inference. This method enhances the accuracy of crack boundary segmentation and reduces the miss rate of tiny crack branches from HR images, all while conserving computational resources. Through model parameter experiments and ablation studies, the optimal model was obtained, and the effectiveness of the improved components was demonstrated. Furthermore, the field test has confirmed that, equipped with the proposed point rendering technique, the UAV is permitted to effectively perform crack inspection within a 3-m distance from the main beam. Compared to traditional low-resolution semantic segmentation methods, the UAV bridge inspection time is significantly reduced by 50% while maintaining the same accuracy.
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Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 45
·39140-39149
·
IF 9.5
Zewen Sun,Shiyi Wang,Xiaoyun Zhan,Xinhai Yuan,Lili Liu,Lijun Fu,Yuhui Chen,Yuan Ma,Tao Wang,Yuping Wu
Gel polymer electrolytes (GPEs) have attracted considerable attention because of their potential to enhance the safety of rechargeable batteries, including lithium metal batteries. Nonetheless, significant challenges still remain, such as insufficient mechanical strength, limited ionic conductivity, and an unstable solid electrolyte interphase (SEI). This study developed a novel GPE with a polyethylene (PE) separator skeleton, featuring a semi-interpenetrating network (semi-IPN) structure. This is achieved by incorporating crosslinked polyethylene glycol diacrylate (C-PEGDA) into a dual-polymer matrix of poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and poly (methyl methacrylate) (PMMA). It exhibits outstanding high stress and strain properties (155.2 MPa, 182%) and can remain stable for extended periods at 150 °C. The semi-IPN effectively reduces its crystallinity while suppressing anion migration. As a result, lithium ions can migrate rapidly through coordination with carbonyl (CO) and ether (C–O–C) groups, leading to a notable enhancement in ionic conductivity (0.64 mS cm−1) in the gel network formed by injection of electrolytes. Furthermore, the nonporous crosslinked architecture significantly broadens the electrochemical window (>4.8 V) and exhibits excellent compatibility with Li metal anodes and effective dendrite suppression. Consequently, Li‖Li symmetric cells show stable cycling over 1000 h, and Li‖LiFePO4 cells maintain 96.2% capacity retention after 500 cycles. This study provides critical insights for the development of high-performance energy storage devices with enhanced safety.
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