Advanced Powder Technology最新文献_第3页

Hierarchical CuS Nanoflowers enable efficient photo-assisted Cu2+ reversible storage for advanced aqueous copper ion batteries 层次化cu纳米花为先进的水铜离子电池提供了高效的光辅助Cu2+可逆存储

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-30 DOI: 10.1016/j.apt.2025.105160

Fang Chen , Xupeng Zhu , Xuliang Fan , Haibin Liu , Wanting Pan , Xunfu Zhou , Liang Zhan , Xiaosong Zhou , Ya-Hao Wang

Photo-assisted rechargeable battery has emerged as a promising energy storage system owing to its enhanced electrochemical performance under illumination. A key challenge in advancing this system is the development of active electrode material that combine strong photoactivity and highly reversible capacity. Herein, the hierarchical CuS nanoflower (H-CuS-NF) with reversible copper-ion storage and photo-responsive properties is demonstrated as a promising photo-cathode material for aqueous copper ion battery. Compared to the dark condition as well as CuS nanosheet (CuS-NS), the H-CuS-NF cathode delivers a higher discharge capacity of 662.0 mAh/g at 600 mA/g and a superior rate retention of 87.6 % when the current density increases from 600 to 1800 mA/g under illuminated condition. The enhanced performance is attributed to a more robust photo-assisted charge–discharge process, as confirmed by electronic structure analysis and theoretical simulations, which effectively facilitates the CuS-Cu₂S conversion. Furthermore, the photo-assisted H-CuS-NF//Zn hybrid battery exhibits an expanded operating voltage of 1.15 V, exceptional discharge capacity of 694.6 mAh/g, and photo-charging capability of 104.2 mAh/g (after lighting 4 h), showing its significant potential for commercial applications. This work proves the morphology-mediated strategy for fabricating advanced CuS photoelectrode for high-performance photo-assisted rechargeable battery.

光辅助可充电电池因其在光照下电化学性能的提高而成为一种很有前途的储能系统。推进该系统的一个关键挑战是开发结合强光活性和高可逆容量的活性电极材料。本文中，层叠cu纳米花（h - cu - nf）具有可逆的铜离子存储和光响应特性，是一种很有前途的水铜离子电池光阴极材料。在光照条件下，当电流密度从600 mA/g增加到1800 mA/g时，h - cu - nf阴极的放电容量达到662.0 mAh/g，保持率达到87.6%。电子结构分析和理论模拟证实，光辅助充放电过程更加稳健，有效地促进了cu - cu2s的转换。此外，光辅助h - cu - nf //Zn混合电池的扩展工作电压为1.15 V，放电容量为694.6 mAh/g，光充电容量为104.2 mAh/g（照明4 h后），显示出巨大的商业应用潜力。本研究为高性能光辅助可充电电池用先进cu光电极的制备提供了理论依据。

{"title":"Hierarchical CuS Nanoflowers enable efficient photo-assisted Cu2+ reversible storage for advanced aqueous copper ion batteries","authors":"Fang Chen , Xupeng Zhu , Xuliang Fan , Haibin Liu , Wanting Pan , Xunfu Zhou , Liang Zhan , Xiaosong Zhou , Ya-Hao Wang","doi":"10.1016/j.apt.2025.105160","DOIUrl":"10.1016/j.apt.2025.105160","url":null,"abstract":"<div><div>Photo-assisted rechargeable battery has emerged as a promising energy storage system owing to its enhanced electrochemical performance under illumination. A key challenge in advancing this system is the development of active electrode material that combine strong photoactivity and highly reversible capacity. Herein, the hierarchical CuS nanoflower (H-CuS-NF) with reversible copper-ion storage and photo-responsive properties is demonstrated as a promising photo-cathode material for aqueous copper ion battery. Compared to the dark condition as well as CuS nanosheet (CuS-NS), the H-CuS-NF cathode delivers a higher discharge capacity of 662.0 mAh/g at 600 mA/g and a superior rate retention of 87.6 % when the current density increases from 600 to 1800 mA/g under illuminated condition. The enhanced performance is attributed to a more robust photo-assisted charge–discharge process, as confirmed by electronic structure analysis and theoretical simulations, which effectively facilitates the CuS-Cu<sub>2</sub>S conversion. Furthermore, the photo-assisted H-CuS-NF//Zn hybrid battery exhibits an expanded operating voltage of 1.15 V, exceptional discharge capacity of 694.6 mAh/g, and photo-charging capability of 104.2 mAh/g (after lighting 4 h), showing its significant potential for commercial applications. This work proves the morphology-mediated strategy for fabricating advanced CuS photoelectrode for high-performance photo-assisted rechargeable battery.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"37 2","pages":"Article 105160"},"PeriodicalIF":4.2,"publicationDate":"2025-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of Nafion adsorption behavior on Silane-modified alumina particles using Hansen solubility parameters 利用Hansen溶解度参数研究硅烷改性氧化铝颗粒对Nafion的吸附行为

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-30 DOI: 10.1016/j.apt.2025.105159

Ryosuke Maekawa , Makoto Kawano , Chika Takai

To not only enhance the mass-transport of the cathode layer (CL) of polymer electrolyte fuel cells (PEFC) but also to improve the dispersibility of catalyst-supported particles, the Nafion adsorption ratio and the structure on the particles in an ink, a precursor of the CL, are key factors. Based on our previous results, the quantitative structure–property relationships (QSPR) method, which can accurately estimate the Hansen solubility parameter (HSP) indicating the compatibility of substances, has been applied to particle surface design to improve the Nafion adsorption ratio and to redetermine the HSP value of Nafion for analyzing the adsorption structure. Alumina particles modified by silane coupling agents, used as model particles with HSP values well-defined in previous work, and Nafion are mixed in a water/ethanol/1-propanol solvent. Then, the Nafion adsorption ratio is measured. The HSP values of Nafion are redetermined by a dissolution test or through the QSPR method. We investigate whether the Nafion adsorption ratio correlates with the HSP difference between the particles and the solvent, and whether the Nafion adsorption structure can be estimated using the HSP difference between the particles and Nafion.

为了提高聚合物电解质燃料电池（PEFC）阴极层（CL）的质量输运，同时提高催化剂负载颗粒的分散性，离子吸附比和颗粒在CL前驱体墨水中的结构是关键因素。在此基础上，将定量构效关系（quantitative structure - property relations， QSPR）方法应用于颗粒表面设计，提高Nafion吸附比，重新确定Nafion的HSP值，分析吸附结构。QSPR方法可以准确估计表征物质相容性的Hansen溶解度参数（HSP）。用硅烷偶联剂修饰的氧化铝颗粒作为模型颗粒，在之前的工作中定义了HSP值，并将Nafion混合在水/乙醇/1-丙醇溶剂中。然后，测量Nafion吸附比。通过溶出度试验或QSPR法重新测定Nafion的热稳定度值。我们研究了Nafion吸附比是否与颗粒和溶剂之间的热sp差相关，以及是否可以利用颗粒和Nafion之间的热sp差来估计Nafion的吸附结构。

{"title":"Investigation of Nafion adsorption behavior on Silane-modified alumina particles using Hansen solubility parameters","authors":"Ryosuke Maekawa , Makoto Kawano , Chika Takai","doi":"10.1016/j.apt.2025.105159","DOIUrl":"10.1016/j.apt.2025.105159","url":null,"abstract":"<div><div>To not only enhance the mass-transport of the cathode layer (CL) of polymer electrolyte fuel cells (PEFC) but also to improve the dispersibility of catalyst-supported particles, the Nafion adsorption ratio and the structure on the particles in an ink, a precursor of the CL, are key factors. Based on our previous results, the quantitative structure–property relationships (QSPR) method, which can accurately estimate the Hansen solubility parameter (HSP) indicating the compatibility of substances, has been applied to particle surface design to improve the Nafion adsorption ratio and to redetermine the HSP value of Nafion for analyzing the adsorption structure. Alumina particles modified by silane coupling agents, used as model particles with HSP values well-defined in previous work, and Nafion are mixed in a water/ethanol/1-propanol solvent. Then, the Nafion adsorption ratio is measured. The HSP values of Nafion are redetermined by a dissolution test or through the QSPR method. We investigate whether the Nafion adsorption ratio correlates with the HSP difference between the particles and the solvent, and whether the Nafion adsorption structure can be estimated using the HSP difference between the particles and Nafion.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"37 2","pages":"Article 105159"},"PeriodicalIF":4.2,"publicationDate":"2025-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145922474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Production of CuCrZr parts via the IR laser powder directed energy deposition through powder modification 采用红外激光粉末定向能沉积法通过粉末改性生产CuCrZr零件

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-27 DOI: 10.1016/j.apt.2025.105152

Hamidreza Javidrad , Bahattin Koc

Additive manufacturing (AM) of copper-based alloys has gained massive attention from different industries due to their wide application in thermal management systems. However, processability of copper alloys remain challenging due to the high laser reflectivity and thermal conductivity. The aim of this work is to develop a cost-effective process for producing near defect-free parts from CuCrZr alloy via the laser powder directed energy deposition (LP-DED) technique. For this purpose, a thermal coating procedure was established and implemented in order to increase the laser absorptivity of this alloy by forming an absorptive layer around the powder particles, as well as increasing their surface roughness. The results showed that the combination of oxidation and nitriding procedures formed a stable and thick layer around the powder particles that can effectively improve the processability of this copper alloy and increase the density of the bulk specimens by increasing the melt pool stability. The optimized process parameters successfully resulted in near-fully dense bulk parts without using excessive input heat that could have damaged the optics and nozzle. The obtained microstructure from the bulk samples revealed finer grains for the treated powders due to the formation of coarser precipitates, which resulted in comparable mechanical properties.

铜基合金的增材制造技术由于在热管理系统中的广泛应用而受到了不同行业的广泛关注。然而，由于铜合金具有较高的激光反射率和导热性，其可加工性仍然具有挑战性。本研究的目的是通过激光粉末定向能沉积（LP-DED）技术，开发一种具有成本效益的CuCrZr合金生产近无缺陷零件的工艺。为此，建立并实施了热涂层程序，通过在粉末颗粒周围形成吸收层来增加该合金的激光吸收率，并增加其表面粗糙度。结果表明，氧化和氮化复合处理在粉末颗粒周围形成了一层稳定的厚层，通过提高熔池稳定性，有效提高了铜合金的可加工性，提高了体块试样的密度。优化的工艺参数成功地产生了接近完全致密的大块零件，而没有使用过多的输入热量，这可能会损坏光学和喷嘴。从大块样品中获得的微观结构显示，由于形成了更粗的沉淀，处理后的粉末颗粒更细，这导致了类似的机械性能。

{"title":"Production of CuCrZr parts via the IR laser powder directed energy deposition through powder modification","authors":"Hamidreza Javidrad , Bahattin Koc","doi":"10.1016/j.apt.2025.105152","DOIUrl":"10.1016/j.apt.2025.105152","url":null,"abstract":"<div><div>Additive manufacturing (AM) of copper-based alloys has gained massive attention from different industries due to their wide application in thermal management systems. However, processability of copper alloys remain challenging due to the high laser reflectivity and thermal conductivity. The aim of this work is to develop a cost-effective process for producing near defect-free parts from CuCrZr alloy via the laser powder directed energy deposition (LP-DED) technique. For this purpose, a thermal coating procedure was established and implemented in order to increase the laser absorptivity of this alloy by forming an absorptive layer around the powder particles, as well as increasing their surface roughness. The results showed that the combination of oxidation and nitriding procedures formed a stable and thick layer around the powder particles that can effectively improve the processability of this copper alloy and increase the density of the bulk specimens by increasing the melt pool stability. The optimized process parameters successfully resulted in near-fully dense bulk parts without using excessive input heat that could have damaged the optics and nozzle. The obtained microstructure from the bulk samples revealed finer grains for the treated powders due to the formation of coarser precipitates, which resulted in comparable mechanical properties.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"37 2","pages":"Article 105152"},"PeriodicalIF":4.2,"publicationDate":"2025-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145839644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of side aerations on the initiation of solids circulation and energy supplied in a U-type loop seal of a fluidized bed reactor 侧曝气对流化床反应器u型环封固体循环启动及供能的影响

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-24 DOI: 10.1016/j.apt.2025.105158

Krissada Namwong , Kritsadang Senawong , Chuan Paengpatsa , Atipong Armatsombat

The initiation of solids circulation is a critical aspect of fluidized bed reactor operation, governed by the performance of the loop seal. This study aimed to determine the optimal side aeration position in the supply chamber that affects the efficiency of circulation initiation, the solids circulation rate during the initiation phase, and the overall energy consumption of the loop seal. Experiments were conducted using a riser with a cross-sectional area of 100 × 100 mm² and a height of 4500 mm, coupled with a U-type loop seal of identical cross-section comprising supply and recycle chambers connected by a 50 mm horizontal passage. Three side aeration ports were installed on the side wall of the supply chamber at different positions: along the centerline of the horizontal passage, at the top wall level, and above the horizontal passage. Silica sand with an average particle diameter of 320 µm was used as the bed material. Results showed that the centerline port facilitated the initiation of solids circulation more effectively than the other positions and yielded the highest solids circulation rate under a constant side aeration flow. Furthermore, the U-type loop seal with both side and bottom aeration required a lower total aeration flow than the conventional loop seal with bottom aeration only, resulting in reduced energy consumption.

固体循环的启动是流化床反应器运行的一个关键方面，由回路密封的性能决定。本研究旨在确定影响循环启动效率、启动阶段固体循环速率和回路密封总能耗的最佳侧曝气位置。实验采用横截面积为100 × 100 mm2，高度为4500 mm的立管，以及由50 mm水平通道连接的供应室和回收室组成的相同横截面积的u型环形密封。在供气室侧壁不同位置安装3个侧曝气口：沿水平通道中心线、顶壁水平面、水平通道上方。床层材料选用平均粒径为320µm的硅砂。结果表明：在一定侧曝气流量条件下，中心线口比其他位置更有利于固相循环的启动，且产生的固相循环速率最高；此外，两侧和底部曝气的u型循环密封所需的总曝气流量比仅底部曝气的常规循环密封低，从而降低了能耗。

{"title":"Influence of side aerations on the initiation of solids circulation and energy supplied in a U-type loop seal of a fluidized bed reactor","authors":"Krissada Namwong , Kritsadang Senawong , Chuan Paengpatsa , Atipong Armatsombat","doi":"10.1016/j.apt.2025.105158","DOIUrl":"10.1016/j.apt.2025.105158","url":null,"abstract":"<div><div>The initiation of solids circulation is a critical aspect of fluidized bed reactor operation, governed by the performance of the loop seal. This study aimed to determine the optimal side aeration position in the supply chamber that affects the efficiency of circulation initiation, the solids circulation rate during the initiation phase, and the overall energy consumption of the loop seal. Experiments were conducted using a riser with a cross-sectional area of 100 × 100 mm<sup>2</sup> and a height of 4500 mm, coupled with a U-type loop seal of identical cross-section comprising supply and recycle chambers connected by a 50 mm horizontal passage. Three side aeration ports were installed on the side wall of the supply chamber at different positions: along the centerline of the horizontal passage, at the top wall level, and above the horizontal passage. Silica sand with an average particle diameter of 320 µm was used as the bed material. Results showed that the centerline port facilitated the initiation of solids circulation more effectively than the other positions and yielded the highest solids circulation rate under a constant side aeration flow. Furthermore, the U-type loop seal with both side and bottom aeration required a lower total aeration flow than the conventional loop seal with bottom aeration only, resulting in reduced energy consumption.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"37 1","pages":"Article 105158"},"PeriodicalIF":4.2,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Engineering oxidative desulfurization of dibenzothiophene under visible light over novel Ag3PO4/g-C3N4/CuInS2 ternary S-scheme photocatalyst 新型Ag3PO4/g-C3N4/CuInS2三元S-scheme光催化剂在可见光下工程氧化脱硫二苯并噻吩

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-24 DOI: 10.1016/j.apt.2025.105151

Giang T.T. Pham , Hoa T. Vu , Dinh Thai An , Dai Lam Tran , Thi Lan Pham , Tham Thi Pham , Thanh Ngoc Nguyen , Van Thuy Ngo , T.-Thanh-Bao Nguyen , Huan V. Doan , Manh B. Nguyen

Fuels containing sulfur compounds are considered the main cause of SO_x emissions leading to acid rain, so management policies are gradually being tightened to reduce sulfur content in fuels to below 10 ppm or even sulfur-free. However, aromatic compounds containing sulfur in fuels cannot be eliminated by conventional methods. In this study, a third-order S-scheme photocatalyst Ag₃PO₄/GCN/CuInS₂ integrated with carbon quantum dots (CQD, AGC-CQD) was successfully synthesized for the first time using an efficient microwave-assisted method. Influence of Ag₃PO₄ content on the surface area, visible light absorption, electron-hole recombination rate, electron separation ability, and charge transfer within the AGC-CQD was thoroughly investigated. 30 %AGC-CQD material shows the ability to 97.69 % of dibenzothiophene (DBT) removal after 100 min of visible light irradiation, with a reaction rate constant 2.17 times greater than that of the pure 30 %AGC. The impact of various factors, including the amount of Ag₃PO₄, O/S ratio, DBT concentration, photocatalyst dosage, and catalyst reusability, on the efficiency of the photocatalytic process was evaluated. The charge transport pathway is determined through electron density and reactive species trapping experiments. These findings demonstrate the high potential for effective application of AGC-CQD photocatalyst in the production process of low-sulfur fuel.

含硫化合物的燃料被认为是导致酸雨的硫氧化物排放的主要原因，因此管理政策逐渐收紧，将燃料中的硫含量降低到10ppm以下甚至无硫。然而，燃料中含硫的芳香族化合物不能用常规方法去除。本研究首次采用微波辅助的方法成功合成了碳量子点（CQD, AGC-CQD）集成的三阶S-scheme光催化剂Ag3PO4/GCN/CuInS2。研究了Ag3PO4含量对AGC-CQD的表面积、可见光吸收、电子-空穴复合速率、电子分离能力和电荷转移的影响。30% AGC- cqd材料在可见光照射100 min后，对二苯并噻吩（DBT）的去除率为97.69%，反应速率常数为纯30% AGC的2.17倍。考察了Ag3PO4用量、O/S比、DBT浓度、光催化剂用量、催化剂可重复使用性等因素对光催化效率的影响。通过电子密度和反应态捕获实验确定了电荷输运途径。这些发现表明AGC-CQD光催化剂在低硫燃料生产过程中具有很大的应用潜力。

{"title":"Engineering oxidative desulfurization of dibenzothiophene under visible light over novel Ag3PO4/g-C3N4/CuInS2 ternary S-scheme photocatalyst","authors":"Giang T.T. Pham , Hoa T. Vu , Dinh Thai An , Dai Lam Tran , Thi Lan Pham , Tham Thi Pham , Thanh Ngoc Nguyen , Van Thuy Ngo , T.-Thanh-Bao Nguyen , Huan V. Doan , Manh B. Nguyen","doi":"10.1016/j.apt.2025.105151","DOIUrl":"10.1016/j.apt.2025.105151","url":null,"abstract":"<div><div>Fuels containing sulfur compounds are considered the main cause of SO<sub>x</sub> emissions leading to acid rain, so management policies are gradually being tightened to reduce sulfur content in fuels to below 10 ppm or even sulfur-free. However, aromatic compounds containing sulfur in fuels cannot be eliminated by conventional methods. In this study, a third-order S-scheme photocatalyst Ag<sub>3</sub>PO<sub>4</sub>/GCN/CuInS<sub>2</sub> integrated with carbon quantum dots (CQD, AGC-CQD) was successfully synthesized for the first time using an efficient microwave-assisted method. Influence of Ag<sub>3</sub>PO<sub>4</sub> content on the surface area, visible light absorption, electron-hole recombination rate, electron separation ability, and charge transfer within the AGC-CQD was thoroughly investigated. 30 %AGC-CQD material shows the ability to 97.69 % of dibenzothiophene (DBT) removal after 100 min of visible light irradiation, with a reaction rate constant 2.17 times greater than that of the pure 30 %AGC. The impact of various factors, including the amount of Ag<sub>3</sub>PO<sub>4</sub>, O/S ratio, DBT concentration, photocatalyst dosage, and catalyst reusability, on the efficiency of the photocatalytic process was evaluated. The charge transport pathway is determined through electron density and reactive species trapping experiments. These findings demonstrate the high potential for effective application of AGC-CQD photocatalyst in the production process of low-sulfur fuel.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"37 1","pages":"Article 105151"},"PeriodicalIF":4.2,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DEM study of the shear behavior at the nodular pile-cemented soil interface in static drill-rooted nodular pile 静力钻孔桩桩-水泥土界面剪切特性的DEM研究

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-24 DOI: 10.1016/j.apt.2025.105157

Yu-liang Yan , Bang-long Xie , Peng-yuan Zhao , Yong-chao Liu , Bi-sheng Xu

The bearing capacity of static drill-rooted nodular piles (SDRN) can be significantly affected by the load transfer and failure modes at the nodular pile-cemented soil interface. This study conducted a series of three-dimensional nodular pile-cemented soil interface shear tests, and the corresponding numerical models were established using the continuum-discrete coupling method. The evolution of the shear behavior of the nodular pile-cemented soil interface was analyzed, and the effects of nodular pile node angle and width on the interface shear characteristics were investigated. The results indicate that the increase of the node angle not only reduces the interface bonding force, but also weakens the interlocking effect between the node and cemented soil. Increasing the node width within a certain range can significantly improve the interface shear resistance and deformation coordination by enhancing the mechanical interlocking effect and optimizing the stress transfer path. However, excessive increase of node width leads to intensified stress concentration within the cemented soil, resulting in a decrease in peak shear resistance. Finally, a nonlinear mechanical behavior model is proposed for the nodular pile-cemented soil interface. This study provides technical guidance for the design and application of SDRN piles in engineering.

静力钻孔根桩的承载能力受到桩-水泥土界面荷载传递和破坏模式的显著影响。本研究进行了一系列三维结节桩-水泥土界面剪切试验，并采用连续-离散耦合方法建立了相应的数值模型。分析了结桩-水泥土界面抗剪特性的演变过程，研究了结桩节点角度和宽度对界面抗剪特性的影响。结果表明：节点角度的增大不仅降低了界面结合力，而且削弱了节点与胶结土之间的联锁效应；在一定范围内增加节点宽度可以通过增强机械联锁效应和优化应力传递路径，显著提高界面抗剪能力和变形协调性。而节点宽度的过大增大，则会导致胶结土内部应力集中加剧，峰值抗剪能力下降。最后，建立了桩-水泥土界面的非线性力学行为模型。本研究为SDRN桩在工程中的设计和应用提供了技术指导。

{"title":"DEM study of the shear behavior at the nodular pile-cemented soil interface in static drill-rooted nodular pile","authors":"Yu-liang Yan , Bang-long Xie , Peng-yuan Zhao , Yong-chao Liu , Bi-sheng Xu","doi":"10.1016/j.apt.2025.105157","DOIUrl":"10.1016/j.apt.2025.105157","url":null,"abstract":"<div><div>The bearing capacity of static drill-rooted nodular piles (SDRN) can be significantly affected by the load transfer and failure modes at the nodular pile-cemented soil interface. This study conducted a series of three-dimensional nodular pile-cemented soil interface shear tests, and the corresponding numerical models were established using the continuum-discrete coupling method. The evolution of the shear behavior of the nodular pile-cemented soil interface was analyzed, and the effects of nodular pile node angle and width on the interface shear characteristics were investigated. The results indicate that the increase of the node angle not only reduces the interface bonding force, but also weakens the interlocking effect between the node and cemented soil. Increasing the node width within a certain range can significantly improve the interface shear resistance and deformation coordination by enhancing the mechanical interlocking effect and optimizing the stress transfer path. However, excessive increase of node width leads to intensified stress concentration within the cemented soil, resulting in a decrease in peak shear resistance. Finally, a nonlinear mechanical behavior model is proposed for the nodular pile-cemented soil interface. This study provides technical guidance for the design and application of SDRN piles in engineering.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"37 1","pages":"Article 105157"},"PeriodicalIF":4.2,"publicationDate":"2025-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Amorphous to crystalline phase transition in iron oxide nanoparticles prepared by Aloe vera assisted green synthesis 芦荟辅助绿色合成制备的氧化铁纳米颗粒的非晶晶相变

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-24 DOI: 10.1016/j.apt.2025.105154

Vincenzina Strano , Vanna Torrisi , Simona Boninelli , Maria Miritello

Iron oxide nanostructures synthesized through green methods have gained significant attention due to their eco-friendly nature, low cost and the possibility to avoid toxic reagents. In this work, we present the green synthesis of Fe₂O₃ nanoparticles (NPs) using Aloe-vera leaf extract as a natural reducing and stabilizing agent. The as-prepared nanostructures exhibit an amorphous nature, which evolves into a crystalline structure upon thermal annealing. The detailed structural and spectroscopic analyses reveal the coexistence of two iron oxide phases, maghemite (γ-Fe₂O₃) and hematite (α-Fe₂O₃), providing valuable insights for the development of strategies to tune the properties of iron oxide nanomaterials for targeted applications. In particular, the crystalline NPs were evaluated as photothermal agents for potential use in light-driven therapeutic applications.

通过绿色方法合成的氧化铁纳米结构因其环保、低成本和可以避免使用有毒试剂而受到广泛关注。在这项工作中，我们提出了绿色合成Fe2O3纳米颗粒（NPs），使用芦荟叶提取物作为天然还原和稳定剂。制备的纳米结构表现为非晶性质，在热处理后演变成晶体结构。详细的结构和光谱分析揭示了两种氧化铁相，磁赤铁矿（γ-Fe2O3）和赤铁矿（α-Fe2O3）的共存，为调整氧化铁纳米材料的性能策略的发展提供了有价值的见解。特别地，晶体NPs被评价为光热剂在光驱动治疗应用中的潜在用途。

引用次数: 0

Simultaneously improving the permeability, core loss and frequency stability of Fe-based soft magnetic composite by optimizing the aspect ratio of reduced Fe powders 通过优化还原铁粉的长径比，同时提高铁基软磁复合材料的磁导率、铁心损耗和频率稳定性

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-23 DOI: 10.1016/j.apt.2025.105156

Shuainan Xu , Yang Zhou , Hongya Yu , Haiping Wei , Jinwen Hu , Zhongwu Liu

Aiming at developing Fe-based soft magnetic composites (SMCs) with good high-frequency performance, the aspect ratio of reduced Fe powders was modified by ball-milling. The SMCs were prepared by phosphating treatment and resin binding followed by pressing forming. It is found that a large aspect ratio of the powder can effectively reduce the demagnetizing field and suppress the intra-particle eddy loss in the SMC by forming a lamellar structure. As a result, the effective permeability μ_e, core loss P_s, and frequency stability of the SMC can be simultaneously improved. The excellent magnetic properties with high μ_e of 84, low core loss P_s of 552 kW/m³ at 50 mT and 100 kHz, and high-quality factor Q of 62, together with a high frequency stability up to 2.5 MHz, were obtained by using the reduced Fe powders with the aspect ratio of 30:1. Electromagnetic simulation further verified that the increased aspect ratio contributes to the reduced eddy current loss. This work provides a possibility for the application of reduced Fe powder in SMCs for high performance power inductors or other electronic components.

为了研制具有良好高频性能的铁基软磁复合材料，采用球磨法对还原铁粉的长径比进行了改性。采用磷化处理、树脂结合、压制成型法制备了SMCs。研究发现，大长径比的粉末可以有效地降低退磁场，并通过形成层状结构来抑制SMC中的颗粒内涡流损失。同时提高了SMC的有效磁导率μe、磁芯损耗Ps和频率稳定性。采用长径比为30:1的还原铁粉，在50 mT和100 kHz条件下，获得了高μe为84、低磁芯损耗Ps为552 kW/m3、高质量因数Q为62的优异磁性能和高达2.5 MHz的高频稳定性。电磁仿真进一步验证了宽高比的增大有助于减小涡流损耗。这项工作为还原铁粉在高性能功率电感或其他电子元件的SMCs中的应用提供了可能性。

{"title":"Simultaneously improving the permeability, core loss and frequency stability of Fe-based soft magnetic composite by optimizing the aspect ratio of reduced Fe powders","authors":"Shuainan Xu , Yang Zhou , Hongya Yu , Haiping Wei , Jinwen Hu , Zhongwu Liu","doi":"10.1016/j.apt.2025.105156","DOIUrl":"10.1016/j.apt.2025.105156","url":null,"abstract":"<div><div>Aiming at developing Fe-based soft magnetic composites (SMCs) with good high-frequency performance, the aspect ratio of reduced Fe powders was modified by ball-milling. The SMCs were prepared by phosphating treatment and resin binding followed by pressing forming. It is found that a large aspect ratio of the powder can effectively reduce the demagnetizing field and suppress the intra-particle eddy loss in the SMC by forming a lamellar structure. As a result, the effective permeability <em>μ</em><sub>e</sub>, core loss <em>P</em><sub>s</sub>, and frequency stability of the SMC can be simultaneously improved. The excellent magnetic properties with high <em>μ</em><sub>e</sub> of 84, low core loss <em>P</em><sub>s</sub> of 552 kW/m<sup>3</sup> at 50 mT and 100 kHz, and high-quality factor Q of 62, together with a high frequency stability up to 2.5 MHz, were obtained by using the reduced Fe powders with the aspect ratio of 30:1. Electromagnetic simulation further verified that the increased aspect ratio contributes to the reduced eddy current loss. This work provides a possibility for the application of reduced Fe powder in SMCs for high performance power inductors or other electronic components.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"37 1","pages":"Article 105156"},"PeriodicalIF":4.2,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tunable microwave absorption of NiMn-C core–shell nanoparticles via Ni/Mn atomic ratio control 通过Ni/Mn原子比控制NiMn-C核壳纳米粒子的可调微波吸收

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-23 DOI: 10.1016/j.apt.2025.105153

Xiaogang Sun , Yiming Yang , Pengxing Huang , Daitao Kuang , Xiang Li , Xiang Zhang , Xiaomin Peng , Qian Tang , Yi Chen , Zhonghua Huang

Core-shell nanostructures combining magnetic metals with carbon matrices have emerged as promising candidates for high-performance microwave absorption. In this work, we report the facile synthesis of NiMn-C core–shell nanoparticles via a one-step metal–organic chemical vapor deposition method, which enables precise tuning of the Ni/Mn atomic ratio. The as-synthesized nanoparticles, with an average diameter of ∼11 nm, exhibit improved microwave absorption properties, including a minimum reflection loss of −35.5 dB and a broad effective absorption bandwidth of 6.0 GHz at a thin thickness of 2.0 mm. Full-wave radar cross-section simulations, conducted using CST Microwave Studio, further confirm the material’s superior microwave scattering suppression, underscoring its practical stealth utility. Moreover, the NiMn-C absorber maintains its wide effective absorption bandwidth under conditions of low filler loading (16.7 wt%) and lightweight design, demonstrating its potential for electromagnetic interference (EMI) shielding and radar-absorbing applications. This study provides a viable strategy for designing efficient, lightweight microwave absorbers with tunable compositions.

磁性金属与碳基体结合的核壳纳米结构已成为高性能微波吸收的有希望的候选者。在这项工作中，我们报告了通过一步金属有机化学气相沉积方法轻松合成NiMn-C核壳纳米粒子，该方法可以精确调节Ni/Mn原子比。合成的纳米颗粒平均直径为~ 11 nm，具有较好的微波吸收性能，包括最小反射损耗为- 35.5 dB，有效吸收带宽为6.0 GHz，薄厚度为2.0 mm。利用CST Microwave Studio进行的全波雷达截面模拟进一步证实了该材料优越的微波散射抑制能力，强调了其实际的隐身效用。此外，NiMn-C吸收体在低填充载荷（16.7 wt%）和轻量化设计的条件下保持了较宽的有效吸收带宽，显示了其在电磁干扰（EMI）屏蔽和雷达吸收应用方面的潜力。本研究为设计具有可调成分的高效、轻量化微波吸收器提供了可行的策略。

{"title":"Tunable microwave absorption of NiMn-C core–shell nanoparticles via Ni/Mn atomic ratio control","authors":"Xiaogang Sun , Yiming Yang , Pengxing Huang , Daitao Kuang , Xiang Li , Xiang Zhang , Xiaomin Peng , Qian Tang , Yi Chen , Zhonghua Huang","doi":"10.1016/j.apt.2025.105153","DOIUrl":"10.1016/j.apt.2025.105153","url":null,"abstract":"<div><div>Core-shell nanostructures combining magnetic metals with carbon matrices have emerged as promising candidates for high-performance microwave absorption. In this work, we report the facile synthesis of NiMn-C core–shell nanoparticles via a one-step metal–organic chemical vapor deposition method, which enables precise tuning of the Ni/Mn atomic ratio. The as-synthesized nanoparticles, with an average diameter of ∼11 nm, exhibit improved microwave absorption properties, including a minimum reflection loss of −35.5 dB and a broad effective absorption bandwidth of 6.0 GHz at a thin thickness of 2.0 mm. Full-wave radar cross-section simulations, conducted using CST Microwave Studio, further confirm the material’s superior microwave scattering suppression, underscoring its practical stealth utility. Moreover, the NiMn-C absorber maintains its wide effective absorption bandwidth under conditions of low filler loading (16.7 wt%) and lightweight design, demonstrating its potential for electromagnetic interference (EMI) shielding and radar-absorbing applications. This study provides a viable strategy for designing efficient, lightweight microwave absorbers with tunable compositions.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"37 1","pages":"Article 105153"},"PeriodicalIF":4.2,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-efficiency dust control strategy for wind turbine blade flash processing: CFD-DEM simulation and experimental validation 风电叶片闪蒸处理高效粉尘控制策略：CFD-DEM仿真与实验验证

IF 4.2 2区工程技术 Q2 ENGINEERING, CHEMICAL

Advanced Powder Technology

Pub Date : 2025-12-20 DOI: 10.1016/j.apt.2025.105155

Ruwei Yao , Haixiang Huan , Guanggui Cheng , Wei Liu , Li Li , Jie Wu , Zehua Dai , Xinchao Wang , Zhong Dai

Flash structures formed during Vacuum Assisted Resin Infusion impair wind turbine blade aerodynamics and require precision trimming of Glass Fiber Reinforced Plastic (GFRP) materials, generating respirable dust with peak concentrations reaching 12 mg/m³. To control dust dispersion, a suction hood was implemented. A coupled Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) approach simulated gas–solid flow with fibrous and chunk-shaped non-spherical particles. Structural and process parameter impacts on capture efficiency were systematically evaluated. Capture efficiency critically depends on particle size and morphology: sub-50 µm particles achieve > 97 % capture via airflow entrainment, while particles > 50 µm exhibit significant efficiency loss due to kinetic energy amplification and trajectory instability—particularly fibrous particles (11.66–39.69 % lower efficiency than spherical equivalents). The system combines a 50-mm-diameter M1 pipeline layout (enhancing fibrous particle entrainment and mitigating blockages) with 372 m³/h airflow and 10,000 r/min saw blade rotational speed. This configuration suppresses blade-induced positive pressure zones and turbulent escape, balancing centrifugal effects and suction dynamics to maximize capture across particle types. Testing confirmed effectiveness in preventing dust escape, reducing workshop respirable dust mass concentration by 88.63 %. This work proposes a dust control system for more efficient and safer wind turbine blade manufacturing.

在真空辅助树脂注入过程中形成的闪光结构影响风力涡轮机叶片的空气动力学，需要对玻璃纤维增强塑料（GFRP）材料进行精密修整，产生的呼吸性粉尘峰值浓度可达12 mg/m3。为了控制粉尘的分散，采用了吸力罩。采用计算流体力学-离散元耦合方法（CFD-DEM）模拟了纤维状和块状非球形颗粒的气固流动。系统评价了结构参数和工艺参数对捕集效率的影响。捕获效率主要取决于颗粒的大小和形态：低于50µm的颗粒通过气流携带实现了97%的捕获，而50µm的颗粒由于动能放大和轨迹不稳定而表现出显著的效率损失，尤其是纤维颗粒（效率比球形当量低11.66 - 39.69%）。该系统采用直径为50mm的M1管道布局（增强纤维颗粒夹带并减轻堵塞），气流为372 m3/h，锯片转速为10,000 r/min。这种结构抑制了叶片引起的正压区和湍流逃逸，平衡了离心效应和吸力动力学，最大限度地捕获了不同类型的颗粒。试验证实有效防止粉尘逸出，使车间呼吸性粉尘质量浓度降低88.63%。本工作提出了一种更高效、更安全的风力发电机叶片制造粉尘控制系统。

{"title":"High-efficiency dust control strategy for wind turbine blade flash processing: CFD-DEM simulation and experimental validation","authors":"Ruwei Yao , Haixiang Huan , Guanggui Cheng , Wei Liu , Li Li , Jie Wu , Zehua Dai , Xinchao Wang , Zhong Dai","doi":"10.1016/j.apt.2025.105155","DOIUrl":"10.1016/j.apt.2025.105155","url":null,"abstract":"<div><div>Flash structures formed during Vacuum Assisted Resin Infusion impair wind turbine blade aerodynamics and require precision trimming of Glass Fiber Reinforced Plastic (GFRP) materials, generating respirable dust with peak concentrations reaching 12 mg/m<sup>3</sup>. To control dust dispersion, a suction hood was implemented. A coupled Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) approach simulated gas–solid flow with fibrous and chunk-shaped non-spherical particles. Structural and process parameter impacts on capture efficiency were systematically evaluated. Capture efficiency critically depends on particle size and morphology: sub-50 µm particles achieve > 97 % capture via airflow entrainment, while particles > 50 µm exhibit significant efficiency loss due to kinetic energy amplification and trajectory instability—particularly fibrous particles (11.66–39.69 % lower efficiency than spherical equivalents). The system combines a 50-mm-diameter M1 pipeline layout (enhancing fibrous particle entrainment and mitigating blockages) with 372 m<sup>3</sup>/h airflow and 10,000 r/min saw blade rotational speed. This configuration suppresses blade-induced positive pressure zones and turbulent escape, balancing centrifugal effects and suction dynamics to maximize capture across particle types. Testing confirmed effectiveness in preventing dust escape, reducing workshop respirable dust mass concentration by 88.63 %. This work proposes a dust control system for more efficient and safer wind turbine blade manufacturing.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"37 1","pages":"Article 105155"},"PeriodicalIF":4.2,"publicationDate":"2025-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145836925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0