Advanced Powder Technology最新文献_第2页

Periodic wear modelling in bulk solids screw conveying: A surface-profile-based framework validated through experiment and DEM simulation 散装固体螺旋输送中的周期性磨损建模：通过实验和DEM仿真验证的基于表面轮廓的框架

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-19 DOI: 10.1016/j.apt.2025.105067

Weijie Yang , Yangyi Zhang , Yuan Tan

{"title":"Periodic wear modelling in bulk solids screw conveying: A surface-profile-based framework validated through experiment and DEM simulation","authors":"Weijie Yang , Yangyi Zhang , Yuan Tan","doi":"10.1016/j.apt.2025.105067","DOIUrl":"10.1016/j.apt.2025.105067","url":null,"abstract":"<div><div>The vertical screw ship unloader plays a vital role in the transportation of bulk cargo at ports. However, severe wear of screw pipe wall remains a major challenge, often shortens its service life and increases maintenance costs. Existing models cannot accurately predict wear progression or assess its lifespan under different operating conditions. In this study, a novel predictive framework, which did not require on-site disassembly or operational interruption, was proposed to assess screw pipe wear. In the framework, the Archard wear model was integrated with the single-particle method and a continuous medium assumption. Its effectiveness was validated by both experimental results and discrete element method (DEM) simulations. With this framework, particle accumulation patterns within the screw conveyor were classified into four types. For each type, a corresponding periodic wear model was proposed and its prediction results were closer to experimental results than conventional DEM-based predictions. Parametric analysis indicated that screw rotational speed had the more significant impact on wear intensity than the filling degree of materials. Additionally, the study confirmed periodic wear along screw pipe and similar wear rates periodically occurring at intervals equal to screw pitch.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105067"},"PeriodicalIF":4.2,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106144","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

Numerical study on the combustion characteristics and soot formation in an outwardly propagating iso-octane rich turbulent flame 向外传播的富异辛烷湍流火焰燃烧特性及烟尘形成的数值研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-19 DOI: 10.1016/j.apt.2025.105057

Takashi Ikeda , Hiroaki Watanabe , Ekenechukwu Chijioke Okafor , Ryoichi Kurose , Toshiaki Kitagawa

{"title":"Numerical study on the combustion characteristics and soot formation in an outwardly propagating iso-octane rich turbulent flame","authors":"Takashi Ikeda , Hiroaki Watanabe , Ekenechukwu Chijioke Okafor , Ryoichi Kurose , Toshiaki Kitagawa","doi":"10.1016/j.apt.2025.105057","DOIUrl":"10.1016/j.apt.2025.105057","url":null,"abstract":"<div><div>Direct numerical simulation of a two-dimensional outwardly propagating <em>iso</em>-octane rich turbulent flames which was classified into Corrugated Flamelets regime in Peters diagram was conducted at an equivalence ratio of 1.4 to investigate the effects of local flame stretch rate and turbulence on soot formation and distribution with a non-unity Lewis number. Soot formation was investigated at points where the flame stretch rate was almost identical, while the contribution of curvature and flow to stretch rate differed. At all points, soot formation is remarkable at regions with negative flame stretch rate compared to regions with positive flame stretch rate. These results suggest that flame stretch rate may correlate with soot formation in turbulent flames in the Corrugated Flamelets regime. In this study, C<sub>2</sub>H<sub>2</sub> is regarded as the precursor of soot. At regions with negative flame stretch rate, the C<sub>2</sub>H<sub>2</sub> concentration is higher than that at regions with positive flame stretch rate. In addition, in the region where the contribution of flow field is larger than that of curvature, soot distribution is located further towards the burned side compared to the region of negative flame stretch rate. These results indicate that the effect of turbulence itself on soot distribution.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105057"},"PeriodicalIF":4.2,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106141","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

Flowability, shape and structure characterization of recycled particles originating from electro discharge machining of H11 alloy H11合金电火花加工再生颗粒的流动性、形状和结构表征

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-19 DOI: 10.1016/j.apt.2025.105064

Oliver Voigt, Thomas Buchwald, Lisa Ditscherlein, Ralf Ditscherlein, Urs Alexander Peuker

{"title":"Flowability, shape and structure characterization of recycled particles originating from electro discharge machining of H11 alloy","authors":"Oliver Voigt, Thomas Buchwald, Lisa Ditscherlein, Ralf Ditscherlein, Urs Alexander Peuker","doi":"10.1016/j.apt.2025.105064","DOIUrl":"10.1016/j.apt.2025.105064","url":null,"abstract":"<div><div>There is a need in metal powder manufacturing to provide alternative supplies because the only production method is the energy– and cost–intensive melt atomization. The aim of this study is focused on recycling of metallic particles originating from electro discharge machining. Extracted particles from accumulating erosion sludges fulfill theoretically specifications of powders regarding particle size and shape. Two fractions were analyzed via laser diffraction, image analysis and electron microscopy and compared to the benchmark <em>H</em>11–alloy. Bulk properties were measured and powders were investigated in a powder shear cell regarding flowability. These properties were combined with measurements of particle surface roughness in an atomic force microscope. Powders were examined by micro–computed tomography to obtain particle–discrete data. Recycled particles fulfill requirements regarding size, shape and defects. Their bulk properties align with the reference, showing improved or worsened flowability at certain stresses. Attached graphite in recycled fractions is acting simultaneously as nano–roughness and flow additive. <em>H</em>11 shows an expected flow behavior, and the coarse fraction the smoothest surface. Results of sphericity values cannot support findings for roughness and flowability. Pores within particles are least present for <em>H</em>11, hence recycled fractions have better pore performance compared to literature.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105064"},"PeriodicalIF":4.2,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106145","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

Ignition and combustion mechanisms in Mg-Al alloys via TG-DSC and ReaxFF MD simulations 通过TG-DSC和ReaxFF MD模拟Mg-Al合金的点火和燃烧机理

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-17 DOI: 10.1016/j.apt.2025.105062

Zhihao Jin , Guoqing Zhang , Wei Gao , Haipeng Jiang , Guoliang Li , Xiaoye Geng

{"title":"Ignition and combustion mechanisms in Mg-Al alloys via TG-DSC and ReaxFF MD simulations","authors":"Zhihao Jin , Guoqing Zhang , Wei Gao , Haipeng Jiang , Guoliang Li , Xiaoye Geng","doi":"10.1016/j.apt.2025.105062","DOIUrl":"10.1016/j.apt.2025.105062","url":null,"abstract":"<div><div>Magnesium-aluminum (Mg-Al) alloys are commonly used as high-energy powder materials in solid propellants. Clarifying their ignition and combustion mechanisms is essential to guide alloy composition and particle structure design, thereby improving solid propellant combustion performance. This study utilizes TG-DSC thermal analysis and ReaxFF molecular dynamics simulations to investigate the effect of Al content and oxidation degree on chemical bonding, diffusion behavior, as well as the thermodynamic and structural properties of Mg-Al nanoparticle (MANP) in ignition and combustion. Mutual diffusion of core Mg and external oxygen atoms is critical for accelerating the ignition and combustion of MANP. During heating, the localized clustering of Al atoms enhances the outward diffusion of Mg atoms, resulting in earlier melting of core-region atoms and facilitating faster ignition of MANP. This is consistent with TG-DSC experimental results showing that the addition of Al lowers the onset temperature of the accelerated oxidation stage. MANP combustion can be divided in three stages: rapid rise, slow and stable stage. MANP with thinner oxide layers exhibit stronger diffusion intensity of core-Mg atoms and a significantly higher capacity for oxygen adsorption on the particle surface, resulting in a higher temperature rise rate and peak temperature.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105062"},"PeriodicalIF":4.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106142","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

Optimization of graphite anode delamination and contaminant separation via electrical pulsed discharge for direct recycling 电脉冲放电直接回收石墨阳极分层及污染物分离的优化

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-17 DOI: 10.1016/j.apt.2025.105066

Chiharu Tokoro , Masaki Horiuchi , Asako Narita , Akiko Kubota , Yutaro Takaya

{"title":"Optimization of graphite anode delamination and contaminant separation via electrical pulsed discharge for direct recycling","authors":"Chiharu Tokoro , Masaki Horiuchi , Asako Narita , Akiko Kubota , Yutaro Takaya","doi":"10.1016/j.apt.2025.105066","DOIUrl":"10.1016/j.apt.2025.105066","url":null,"abstract":"<div><div>This study investigated the direct recycling of graphite anode materials from spent lithium-ion batteries using electrical pulsed discharge (EPD). High-speed imaging showed that direct arc discharge into copper (Cu) foil enabled the efficient delamination of graphite through vapor bubble expansion and shock wave generation. The optimization of sample positioning and discharge pulses influences the discharge behavior, separation efficiency, and material integrity of the samples. Under optimized conditions, over 95% delamination was achieved while maintaining graphite structural integrity, confirmed by XRD, TG-DTA, Raman spectroscopy, and direct observations from optical microscopy and SEM images. ICP-OES and SEM-EDS analyses revealed iron and Cu contaminants from electrode erosion and the anode’s Cu foil. The Cu particles exhibited two morphologies: foil-like fragments from mechanical detachment and spherical particles from arc-induced melting. Post-EPD separation methods, including wet sieving, elutriation, and acid leaching, were evaluated for contaminant removal from the concentrates. Wet sieving isolated low-contamination fractions, whereas elutriation recovered high-purity graphite fractions. Acid leaching reduced the Cu concentrations, particularly in the fine fractions containing porous spherical Cu particles. The results show that the optimized EPD conditions, strategic positioning, and sequential separation processes enable the recovery of intact, high-purity graphite for the direct recycling of spent anodes.</div><div>[Keywords]</div><div>Lithium-ion batteries; Contaminant separation; Recycling; Structural integrity; Elutriation.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105066"},"PeriodicalIF":4.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106143","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

Preventing near-wall particles’ ordering in narrow random packed beds of spheres 防止近壁粒子在狭窄的球形随机堆积床中有序排列

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-17 DOI: 10.1016/j.apt.2025.105060

Maciej Marek , Michał Wilczyński , Artur P. Durajski , Paweł Niegodajew

{"title":"Preventing near-wall particles’ ordering in narrow random packed beds of spheres","authors":"Maciej Marek , Michał Wilczyński , Artur P. Durajski , Paweł Niegodajew","doi":"10.1016/j.apt.2025.105060","DOIUrl":"10.1016/j.apt.2025.105060","url":null,"abstract":"<div><div>Packed-bed reactors with small container-to-particle diameter ratios (<span><math><mrow><msub><mrow><mi>D</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>/</mo><msub><mrow><mi>D</mi></mrow><mrow><mi>p</mi></mrow></msub><mo>⩽</mo><mn>10</mn></mrow></math></span>) face significant performance challenges due to wall-induced flow maldistribution. The characteristic oscillatory void fraction pattern near container’s wall creates preferential flow paths that compromise reaction uniformity and transport efficiency. While modifications of the container’s wall structure have emerged as a potential solution to this problem, the relationship between the length scales of the modifications and packing homogeneity remains insufficiently explored. This study employs numerical modelling to investigate systematically how regular sinusoidal wall corrugation pattern influences particle arrangement and void fraction distribution in randomly packed beds of spherical particles in relatively narrow beds (<span><math><mrow><mn>4</mn><mo>⩽</mo><msub><mrow><mi>D</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>/</mo><msub><mrow><mi>D</mi></mrow><mrow><mi>p</mi></mrow></msub><mo>⩽</mo><mn>10</mn></mrow></math></span>). In a wide parametric study with respect to the amplitude and wavelength of the corrugation, we demonstrate that properly tuned corrugation patterns can substantially suppress near-wall layering and reduce local void fraction oscillations, promoting more uniform and disordered bed structures. We also observe a geometric resonance phenomenon with respect to the corrugation wavelength near value equal to approximately <span><math><mrow><mn>1.6</mn><msub><mrow><mi>D</mi></mrow><mrow><mi>p</mi></mrow></msub></mrow></math></span> where the sensitivity of the packing structure to this parameter is particularly pronounced. These findings provide practical design guidance for improving performance in small-scale random packed-bed systems.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105060"},"PeriodicalIF":4.2,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145106147","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

CO2-to-propane hydrogenation over bifunctional catalysts composed of Pd-loaded ZnZrOx and SAPO-34 负载pd的ZnZrOx和SAPO-34双功能催化剂催化二氧化碳加氢制丙烷

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-12 DOI: 10.1016/j.apt.2025.105061

Shohei Tada , Harune Yamaguchi , Angela Schicker , Ryuji Kikuchi , Masahiko Nishijima

{"title":"CO2-to-propane hydrogenation over bifunctional catalysts composed of Pd-loaded ZnZrOx and SAPO-34","authors":"Shohei Tada , Harune Yamaguchi , Angela Schicker , Ryuji Kikuchi , Masahiko Nishijima","doi":"10.1016/j.apt.2025.105061","DOIUrl":"10.1016/j.apt.2025.105061","url":null,"abstract":"<div><div>We conducted CO<sub>2</sub>-to-propane hydrogenation using bifunctional catalysts composed of Pd-loaded Zn-doped ZrO<sub>2</sub> and SAPO-34, and investigated the effect of Pd loading and reaction conditions on propane production. Three catalysts with different Pd loadings (0–0.2 mol%) were prepared to evaluate the influence of Pd content on catalytic performance. A small amount of Pd significantly enhanced paraffin selectivity, increasing it from approximately 50 % to nearly 100 %, without affecting the total hydrocarbon yield. This effect is attributed to the hydrogenation of olefins over metallic Pd. In contrast, excess Pd loadings promoted the reverse water–gas shift reaction, leading to lower methanol and hydrocarbon production. The reaction was conducted at a larger scale than previously reported, under conditions of 4 MPa and 350 °C, using 850 mg of catalyst and a feed gas flow rate of 30 mL(STP) min<sup>−1</sup>. Under these conditions, a propane yield of 5.0 %, a space–time yield of 0.95 mol kg<sup>−1</sup> h<sup>−1</sup>. Of note, a propane formation rate of 0.80 mmol h<sup>−1</sup> were achieved, which is twice as high as values reported in earlier studies.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105061"},"PeriodicalIF":4.2,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046070","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

Research on wind-spray synergistic dust removal technology in coal mine 煤矿风雾协同除尘技术研究

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-10 DOI: 10.1016/j.apt.2025.105056

Xu Zhang , Wen Nie , Zihao Xiu , Huitian Peng , Lidian Guo

{"title":"Research on wind-spray synergistic dust removal technology in coal mine","authors":"Xu Zhang , Wen Nie , Zihao Xiu , Huitian Peng , Lidian Guo","doi":"10.1016/j.apt.2025.105056","DOIUrl":"10.1016/j.apt.2025.105056","url":null,"abstract":"<div><div>The high concentration dust produced by coal mining seriously endangers the health of coal miners. This study presents an integrated computational-experimental framework for optimizing a wind-spray synergistic dust collector to enhance dust suppression efficiency at the coal face. An improved Euler-Lagrange model incorporating O’Rourke’s droplet collision algorithm was developed, reducing prediction error by 6.7 % compared to standard models. Systematic CFD simulations investigated the effects of seven operational parameters (spray pressure, nozzle diameter, fan velocity, and spray angles) on spray field characteristics. To enable comprehensive multi-parameter optimization, four machine learning (ML) algorithms were evaluated using a 500-sample dataset generated through Latin Hypercube Sampling. The Back-Propagation Neural Network (BPNN) demonstrated superior predictive performance (R2 = 0.981, RMSE = 0.33 g/m3, MAPE = 4.8 %) with excellent generalization capability (ΔRMSE = 0.03 g/m3). Global optimization employing the validated BPNN surrogate model with Sequential Quadratic Programming refinement identified optimal parameters, achieving 136.4 % improvement in average droplet concentration near the drum compared to baseline configurations. Field implementation of the optimized dual-collector system reduced dust concentration at the shearer driver’s position from 372 to 43.7 mg/m3, demonstrating 90.6 % removal efficiency. This integrated CFD-ML methodology provides a robust framework for industrial dust suppression optimization, with significant implications for coal mining safety.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105056"},"PeriodicalIF":4.2,"publicationDate":"2025-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145027136","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

Fabrication and magnetic properties of iron-based nano-crystalline alloys with high magnetic induction 高磁感应强度铁基纳米晶合金的制备及其磁性能

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-09 DOI: 10.1016/j.apt.2025.105055

Han Gao , Yanan Chen , Bo Lin , Yuanfei Cai , Xiaoying Huang , Meng Gao , Yaocen Wang , Likun Chen , Wei Xu , Xing Tong , Hai Guo , Wenbo Wang , Mingliang Xiang , Jun-Qiang Wang , Yan Zhang

引用次数: 0

Anodic growth of nanotubular TiO2/Nb2O5 on Ti-Nb alloys for photocatalytic Cr(VI) removal 纳米管TiO2/Nb2O5在Ti-Nb合金上阳极生长光催化脱除Cr(VI

IF 4.2 2区工程技术

Advanced Powder Technology Pub Date : 2025-09-08 DOI: 10.1016/j.apt.2025.105052

Nurhaswani Alias , Zuhailawati Hussain , Wai Kian Tan , Go Kawamura , Atsunori Matsuda , Zainovia Lockman

{"title":"Anodic growth of nanotubular TiO2/Nb2O5 on Ti-Nb alloys for photocatalytic Cr(VI) removal","authors":"Nurhaswani Alias , Zuhailawati Hussain , Wai Kian Tan , Go Kawamura , Atsunori Matsuda , Zainovia Lockman","doi":"10.1016/j.apt.2025.105052","DOIUrl":"10.1016/j.apt.2025.105052","url":null,"abstract":"<div><div>Hexavalent chromium [Cr(VI)] is a highly toxic and persistent environmental pollutant, posing serious risks to human health and ecosystems. Its photocatalytic reduction to the more benign trivalent chromium [Cr(III)] remains a critical challenge in environmental remediation. This study investigates the formation of nanotubular oxide layers on titanium-niobium (Ti-Nb) alloy pellets via anodization to form a semiconductor photocatalyst for enhanced Cr(VI) reduction. The alloy pellets were prepared using powder metallurgy with Nb contents of 20, 40, and 60 wt% added to Ti powders. After sintering, X-ray diffraction confirmed that Ti-20Nb, Ti-40Nb, and Ti-60Nb primarily contained α-Ti with minor β-Ti phases, with β-Ti increasing as Nb content increased. Anodization of these alloy pellets in a fluoride electrolyte produced well-ordered nanotubular oxide layers with longest nanotubes observed on Ti-40Nb. The anodic oxide was initially amorphous but transformed into a mixed TiO<sub>2</sub>/Nb<sub>2</sub>O<sub>5</sub> structure upon annealing. While Ti-20Nb and Ti-40Nb were dominated by anatase TiO<sub>2</sub>, Ti-60Nb exhibited rather amorphous oxide with HRTEM can see nanocrystallites of TiO<sub>2</sub> and Nb<sub>2</sub>O<sub>5</sub>. Photocatalysis experiments demonstrated that Ti-60Nb showed the best Cr(VI) reduction performance, achieving complete reduction under UV light within 120 min and 90% reduction under solar irradiation, outperforming pure Ti. The enhanced performance is attributed to the formation of TiO<sub>2</sub>/Nb<sub>2</sub>O<sub>5</sub> junctions, which improve charge carrier dynamics suppressing electron-hole recombination.</div></div>","PeriodicalId":7232,"journal":{"name":"Advanced Powder Technology","volume":"36 11","pages":"Article 105052"},"PeriodicalIF":4.2,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010700","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