Applied Surface Science最新文献_第5页

High-Mass-Loading vanadium nitride /N-Doped rGO cathode for fast and stable Zinc-Ion storage 高质量负载氮化钒/掺n氧化石墨烯阴极用于快速稳定的锌离子存储

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-06-28 DOI: 10.1016/j.apsusc.2025.163917

Hui Ma , Chunyan Tang , Fawen Zhang , Zeqi Tao , Jihui Liu , Bo Yan , Huachao Tao

{"title":"High-Mass-Loading vanadium nitride /N-Doped rGO cathode for fast and stable Zinc-Ion storage","authors":"Hui Ma , Chunyan Tang , Fawen Zhang , Zeqi Tao , Jihui Liu , Bo Yan , Huachao Tao","doi":"10.1016/j.apsusc.2025.163917","DOIUrl":"10.1016/j.apsusc.2025.163917","url":null,"abstract":"<div><div>Vanadium nitride (VN) has sparked much interest because of the abundant reserves, multivalent states, and high theoretical specific capacity in aqueous zinc-ion batteries (AZIBs). However, the direct utilization of VN in AZIBs is still huge challenges including sluggish kinetics, low-mass-loading and suboptimal cycling stability. Herein, an exquisite method is employed to enhance the electrochemical performance via compositing of VN with nitrogen-doped reduced graphene oxide (VN/N-rGO) and 3D printing technique. The designed conductive network and hierarchical porous structure enhance the reaction kinetics of the electrode and inhibit its dissolution, thereby improving cycling stability. The fabricated electrodes demonstrate superior reversible capacity of 529.8mAh g<sup>−1</sup>, excellent long-cycle stability (261.6mAh g<sup>−1</sup> after 1000 cycles at 8.0 A g<sup>−1</sup>) and good rate capability. Furthermore, the high-mass-loading VN/N-rGO electrodes (∼13 mg cm<sup>−2</sup>) are constructed through material extrusion 3D printing, and the electrodes still display a high reversible capacity of 390.2mAh g<sup>−1</sup>. The electrochemical reaction mechanism of VN with Zn ions has been extensively studied, indicating that VN irreversibly transforms into Zn<sub>3</sub>(OH)<sub>2</sub>V<sub>2</sub>O<sub>7</sub>(H<sub>2</sub>O)<sub>2</sub> during first cycle, and Zn ions reversibly insert into/extract from the interlayer of Zn<sub>3</sub>(OH)<sub>2</sub>V<sub>2</sub>O<sub>7</sub>(H<sub>2</sub>O)<sub>2</sub> during the following cycles. This work demonstrates that VN holds significant potential as high-mass-loading cathode in AZIBs.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163917"},"PeriodicalIF":6.3,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144516101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural and optical characterization of type I AlSb/GaSb superlattices by means of high-resolution X-ray diffraction, X-ray reflectivity and Raman spectroscopy 用高分辨率x射线衍射、x射线反射率和拉曼光谱研究I型AlSb/GaSb超晶格的结构和光学特性

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-06-28 DOI: 10.1016/j.apsusc.2025.163921

I. Sankowska, A. Jasik, K. Piskorski

{"title":"Structural and optical characterization of type I AlSb/GaSb superlattices by means of high-resolution X-ray diffraction, X-ray reflectivity and Raman spectroscopy","authors":"I. Sankowska, A. Jasik, K. Piskorski","doi":"10.1016/j.apsusc.2025.163921","DOIUrl":"10.1016/j.apsusc.2025.163921","url":null,"abstract":"<div><div>High-resolution X-ray diffraction, X-ray reflectivity and Raman techniques were employed to investigate strained AlSb/GaSb superlattices grown by molecular beam epitaxy on (001) GaSb substrates. The measured diffraction curves exhibited superlattice peaks indicative of high crystal quality. The widths of the zero and + 1 order peaks closely matched the simulated values. However, symmetrical reciprocal space maps around (004) reflection revealed the diffuse scattering components. Analysis of the “ear-like” diffuse scattering indicated a low dislocation density, typically observed at an early stage of relaxation. It was found that the AlSb layer thickness had a more significant impact on dislocation density than the GaSb thickness. In contrast, the lattice mismatch between the superlattice and the substrate had a negligible effect. X-ray reflectivity analysis demonstrated that surface roughness increased with dislocation density. Raman spectroscopy revealed the presence of GaSb-on-AlSb and AlSb-on-GaSb interfaces. The Al alloy composition in the intermediate layers between GaSb and AlSb was established. A strong dependence of the AlSb- and GaSb-LO mode positions and intensities on layer thicknesses was observed. The AlSb-LO mode shift stabilized at 8–10 ML thicknesses, while strain effects in GaSb appeared only at 4 ML. The use of X-ray diffraction and Raman spectrometry in the experiment allowed us to investigate both the structural and optical properties of the AlSb/GaSb superlattice.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163921"},"PeriodicalIF":6.3,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144516112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effects of inserted layers (HfO2, ZrO2, Y2O3, La2O3) on the ferroelectric and synaptic properties of Zr-doped HfO2 sandwich structure 插入层（HfO2, ZrO2, Y2O3, La2O3）对掺杂zr的HfO2夹层结构铁电性能和突触性能的影响

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-06-28 DOI: 10.1016/j.apsusc.2025.163918

Chulwon Chung , Kyungsoo Park , Seunghyeon Yun , Junhyeok Park , Hyeon Cheol Jeong , Changhwan Choi

{"title":"The effects of inserted layers (HfO2, ZrO2, Y2O3, La2O3) on the ferroelectric and synaptic properties of Zr-doped HfO2 sandwich structure","authors":"Chulwon Chung , Kyungsoo Park , Seunghyeon Yun , Junhyeok Park , Hyeon Cheol Jeong , Changhwan Choi","doi":"10.1016/j.apsusc.2025.163918","DOIUrl":"10.1016/j.apsusc.2025.163918","url":null,"abstract":"<div><div>HfO<sub>2</sub>-based ferroelectrics (FEs) have gained significant attention as synaptic devices due to multistate capability enabled by multi-domain FEs and nonvolatile characteristics. However, when these FE thin films are applied to synaptic devices, the polarization switching often results in non-linear behavior during the potentiation and depression of synaptic weights. In this study, we introduced insertion layer structures to induce a depolarization field, effectively suppressing abrupt polarization switching and increasing the coercive field (E<sub>c</sub>) to enhance synaptic device performance. The study investigated the behavior of Zr-doped HfO2 (HZO) FE properties using different insertion layers (HfO<sub>2</sub>, ZrO<sub>2</sub>, Y<sub>2</sub>O<sub>3</sub>, La<sub>2</sub>O<sub>3</sub>). The FE performance was further evaluated for synaptic devices, including the linearity of remnant polarization (P<sub>r</sub>) under varying electric field, endurance characteristics, and cycle-to-cycle variation. Among the materials tested, HfO<sub>2</sub> as the insertion layer yielded the most promising results, showing superior endurance (2ⅹ10<sup>6</sup> cycle) and minimal cycle-to-cycle variation (14.3%) due to its lower oxygen vacancy levels (6.6%). The HfO<sub>2</sub>-inserted FeFET device demonstrated improved synaptic weight control, providing a more states and enhanced linearity in potentiation and depression compared to FeFET without insertion layer. Finally, pattern recognition simulations using the MNIST dataset revealed an accuracy of 87.76%, which represents an improvement of 3.75% over reference.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163918"},"PeriodicalIF":6.3,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144516100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxygen-vacancy engineered Co3O4 cathodes for 3D printing micro-supercapacitor applications 用于3D打印微型超级电容器应用的氧空位工程Co3O4阴极

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-06-27 DOI: 10.1016/j.apsusc.2025.163909

Yongfeng Li , Xiangru Zhu , Xiaowen Zhang , Jinhua Zhang , Yanzhen Liu

{"title":"Oxygen-vacancy engineered Co3O4 cathodes for 3D printing micro-supercapacitor applications","authors":"Yongfeng Li , Xiangru Zhu , Xiaowen Zhang , Jinhua Zhang , Yanzhen Liu","doi":"10.1016/j.apsusc.2025.163909","DOIUrl":"10.1016/j.apsusc.2025.163909","url":null,"abstract":"<div><div>The increasing demand for high-energy–density, customizable Micro-Supercapacitors (MSCs) is driven by the rapid miniaturization, integration, and smart functionalities of electronic devices. The use of 3D printing technology in fabricating high-performance energy storage electrodes opens up novel opportunities for portable and micro-device applications. Through a simple solution reduction method, NaBH<sub>4</sub> is used to adjust the electronic structure of Co<sub>3</sub>O<sub>4</sub>, producing defects rich in oxygen vacancies (Ovs), increasing electroactive sites, reducing resistance, and thus improving the performance of supercapacitors. By mixing with graphene oxide in a certain proportion to prepare 3D printing ink, a three-dimensional conductive network is formed. In this work, the Micro-Supercapacitor (MSC) fabricated via 3D printing technology demonstrates excellent electrochemical performance. It achieves a high areal specific capacity of 715.6 mF cm<sup>−2</sup> at a current density of 1 mA cm<sup>−2</sup>. After 10,000 cycles at a high current density of 9 mA cm<sup>−2</sup>, it retains 92.5 % of its initial capacity. Additionally, it delivers an impressive energy density of 254.4 µWh cm<sup>−2</sup> at a power density of 800 µW cm<sup>−2</sup>. Mesenchymal stem cells fabricated via 3D printing offer a transformative approach for developing next-generation wearable electronics.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163909"},"PeriodicalIF":6.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144516115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface physicochemical properties and flotability modulation of smithsonite by regulating crystal morphology and cleavage process via grinding media 通过研磨介质调节晶体形态和解理过程对菱锌矿表面物理化学性质和可浮性的影响

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-06-27 DOI: 10.1016/j.apsusc.2025.163912

Hong Zheng , Yan Miao , Guangke Ye , Shanshan Dai , Qing Shi , Guofan Zhang

{"title":"Surface physicochemical properties and flotability modulation of smithsonite by regulating crystal morphology and cleavage process via grinding media","authors":"Hong Zheng , Yan Miao , Guangke Ye , Shanshan Dai , Qing Shi , Guofan Zhang","doi":"10.1016/j.apsusc.2025.163912","DOIUrl":"10.1016/j.apsusc.2025.163912","url":null,"abstract":"<div><div>Smithsonite frequently undergoes surface cleavage along distinct crystallographic orientations during grinding. However, research addressing the anisotropy and surface wettability correlations of smithsonite remains unexplored. This study investigated the effects of different grinding media on smithsonite particle morphology and surface physicochemical properties. Laser particle size and SEM analyses revealed that the point loading generated by ball media induced uneven cleavage of smithsonite crystal. Conversely, the spalling forces of rod media promoted sharp edges and angular features, indicative of preferential natural cleavage. Enhanced elongation and flatness facilitated superior bubble adhesion for rod ground particles. XRD, flotation, and contact angle experiments demonstrated that ball ground particles exhibited significant cleavage anisotropy, preferentially exposing hydrophilic (0 1 2) cleavage surfaces. The (0 1 2) surface of smithsonite crystal exposed undercoordinated unsaturated Zn atoms with heightened reactivity. In solutions, preferentially formed hydroxyl compounds and hydration layers on (0 1 2) surfaces hindered oleate adsorption. These findings were corroborated by the molecular orbital matching theory and adsorption simulation. Comparatively, rod grinding effectively suppressed the expression of cleavage anisotropy of smithsonite. The predominant exposure of hydrophobic (1 0 4) surfaces enhanced collector adsorption and improved smithsonite flotability. This work is expected to guide the grinding and flotation from a new perspective of crystal surface properties.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163912"},"PeriodicalIF":6.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144516103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The construction of a “hydrophilic-hydrophobic-zinc-affinitive” gradient structure in the solid electrolyte interphase layer to achieve long-term stable cycling of zinc electrode 在固体电解质相层中构建“亲水-疏水-亲锌”梯度结构，实现锌电极的长期稳定循环

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-06-27 DOI: 10.1016/j.apsusc.2025.163911

Jihao Ye , Jie Liu , Peng Wang , Xiaoyu Yang , Zinan Wang , Hangyu Miao , Zhengping Sun , Shuchang Wei , Ying Yue , Wei Duan , Yunpeng Liu , Yang Ju

{"title":"The construction of a “hydrophilic-hydrophobic-zinc-affinitive” gradient structure in the solid electrolyte interphase layer to achieve long-term stable cycling of zinc electrode","authors":"Jihao Ye , Jie Liu , Peng Wang , Xiaoyu Yang , Zinan Wang , Hangyu Miao , Zhengping Sun , Shuchang Wei , Ying Yue , Wei Duan , Yunpeng Liu , Yang Ju","doi":"10.1016/j.apsusc.2025.163911","DOIUrl":"10.1016/j.apsusc.2025.163911","url":null,"abstract":"<div><div>Aqueous zinc-ion batteries (AZIBs) have gained significant attention due to their excellent safety and high energy density. However, uncontrolled dendrite growth and side reactions on the zinc electrode severely limit their practical application. In this study, 2-Mercaptoethane sulfonate sodium (Mesna) was introduced as an electrolyte additive to address these issues. Mesna anchors to the surface of the zinc electrode, forming a unique “hydrophilic-hydrophobic-zinc-affinitive” three-gradient structure in the solid electrolyte interphase (SEI) layer. The outer layer, consisting of SO<sub>3</sub><sup>−</sup>, forms a hydrophilic interface through electrostatic interactions, effectively reducing the interfacial reaction energy barrier and enhancing the migration kinetics of Zn<sup>2+</sup>. The intermediate layer, composed of alkyl and thiol groups, works together to create a hydrophobic barrier, thereby inhibiting water-induced side reactions. The inner layer, made up of thiol groups, forms chemically stable Zn-S bonds through strong coordination, providing long-term stable interfacial protection and regulating zinc deposition. This multi-level synergistic mechanism enables the modified Zn||Zn half-cell to achieve a cycling life of 3500 h at 1 mA cm<sup>−2</sup> and maintain stable cycling for 400 h at 51.2 % depth of discharge. The molecular interface engineering strategy proposed in this study offers a novel approach for the design of high-stability AZIBs.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163911"},"PeriodicalIF":6.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144516104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tuning carbon black surface morphology via controlled thermal treatment atmosphere 通过控制热处理气氛调节炭黑表面形貌

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-06-27 DOI: 10.1016/j.apsusc.2025.163907

Koki Urita , Chiharu Urita , Hideki Tanaka , Fernando Vallejos-Burgos , Hiroo Notohara , Takuya Araki , Keiji Horio , Hiroshi Furukawa , Masayuki Yoshida , Isamu Moriguchi

{"title":"Tuning carbon black surface morphology via controlled thermal treatment atmosphere","authors":"Koki Urita , Chiharu Urita , Hideki Tanaka , Fernando Vallejos-Burgos , Hiroo Notohara , Takuya Araki , Keiji Horio , Hiroshi Furukawa , Masayuki Yoshida , Isamu Moriguchi","doi":"10.1016/j.apsusc.2025.163907","DOIUrl":"10.1016/j.apsusc.2025.163907","url":null,"abstract":"<div><div>The surface structure of carbon black (CB) is critically dependent on its preparation and post-treatment conditions. This study investigates the impact of thermal treatment atmosphere – vacuum, hydrogen, and inert gas – on the surface morphology and chemical composition of CB. Detailed structural analysis revealed that vacuum treatment promotes significant smoothing of the carbon surface through micrographite bonding and pore closure, while inert and hydrogen gas treatments exhibited a lesser degree of bonding. Furthermore, hydrogen treatment effectively removed oxygen-containing functional groups (OCFGs) and partially suppressed micrographite bonding, leading to the formation of narrow pores. Isosteric heat of adsorption measurements confirmed these structural changes and highlighted the role of OCFGs in hindering N<sub>2</sub> molecule rearrangement on the carbon surface. These findings demonstrate the tunability of carbon surface properties through controlled thermal treatment atmospheres, offering a pathway for optimizing its performance in applications such as adsorption, catalysis, and energy storage.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163907"},"PeriodicalIF":6.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144516105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface chemistry of supported Ru nanoparticles investigated during CO2 hydrogenation by NAP-XPS 用NAP-XPS研究了负载Ru纳米颗粒在CO2加氢过程中的表面化学性质

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-06-27 DOI: 10.1016/j.apsusc.2025.163910

Guillaume B. Rod , Yasemen Kuddusi , Mounir Mensi , Andreas Züttel

{"title":"Surface chemistry of supported Ru nanoparticles investigated during CO2 hydrogenation by NAP-XPS","authors":"Guillaume B. Rod , Yasemen Kuddusi , Mounir Mensi , Andreas Züttel","doi":"10.1016/j.apsusc.2025.163910","DOIUrl":"10.1016/j.apsusc.2025.163910","url":null,"abstract":"<div><div><em>In situ</em> investigation of the surface composition of catalyst particles improves the understanding of the active species in heterogeneous catalysis. This study analyzed the surface chemistry of ruthenium nanoparticles supported on alumina during CO<sub>2</sub> methanation. A model ruthenium catalyst was synthesized via DC magnetron sputtering and depositing the size selected 3.3 nm Ru-particles on an Al<sub>2</sub>O<sub>3</sub> sample. The sample was transferred into the analyzing chamber under UHV conditions and analyzed using NAP-XPS. The emitted photoelectrons show that the main oxidation state of Ru after the deposition is RuO<sub>x</sub>, transient surface oxide. In vacuum, increasing temperature resulted in the reduction of Ru to its metallic state. The hydrogen presence in the methanation feed lowered the temperature required for the reduction from 200 °C to 100 °C. In contrast, the temperature of reduction of RuO<sub>x</sub> under CO<sub>2</sub> atmosphere increased from 200 °C to 300 °C as CO<sub>2</sub> is a mild oxidant. The reaction intermediates of the CO<sub>2</sub> reduction at 350 °C consist of C–C and C–H bonds, whereas the absence of H<sub>2</sub> leads to the formation of C=C bonds on the surface. The Ru particle size on alumina was investigated by TEM and size stability under reactive conditions was observed over the <em>in-situ</em> experimental timescale of hours.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163910"},"PeriodicalIF":6.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144500842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel PAN-based fiber with accelerated alkaline hydrolysis efficiency: co-polymerization, spinning, and modification 一种具有加速碱水解效率的新型pan基纤维：共聚合、纺丝和改性

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-06-27 DOI: 10.1016/j.apsusc.2025.163908

Linlin Fan , Xuehong Yang , Xingxing Zhou , Peiwen Chen , Chenxin Li , Anqun Xu , Kai Hou , Meifang Zhu

{"title":"A novel PAN-based fiber with accelerated alkaline hydrolysis efficiency: co-polymerization, spinning, and modification","authors":"Linlin Fan , Xuehong Yang , Xingxing Zhou , Peiwen Chen , Chenxin Li , Anqun Xu , Kai Hou , Meifang Zhu","doi":"10.1016/j.apsusc.2025.163908","DOIUrl":"10.1016/j.apsusc.2025.163908","url":null,"abstract":"<div><div>This study reported a simple two-step process for improving the efficiency of surface alkaline hydrolysis of Polyacrylonitrile (PAN)-based fibers. In the first step, poly(acrylonitrile-co-acrylic acid) (P(AN-co-AA)) was synthesized by aqueous-phase suspension polymerization with the introduction of an appropriate amount of acrylic acid (AA) comonomers, and P(AN-co-AA) fibers were prepared using wet spinning. However, the absence of neutral comonomers in the copolymer led to suboptimal spinnability of the P(AN-co-AA) solutions. The solvent was difficult to remove during the washing process, thereby hindering the fibers from being drawn at high multiplicity. Therefore, to address this issue, the pH of the washing bath was reduced to disrupt the deprotonation of the carboxyl (COOH) groups. This adjustment successfully realized the preparation of P(AN-co-AA) fibers with a high draw ratio by wet spinning. In the second step, the P(AN-co-AA) fibers were immersed in 12 % NaOH solution at 60 °C for 20 min for surface alkaline hydrolysis modification. The alterations in the structure and properties of the P(AN-co-AA) fibers before and after hydrolysis were analyzed using SEM, FTIR, backward reflection experiments, and XRD. In addition, the improvement of surface alkaline hydrolysis efficiency by introducing COOH groups during the polymerization stage, followed by hydrolysis, was confirmed by comparison with PAN fibers under the same surface alkaline hydrolysis conditions using FTIR and XPS. This is significant for the large-scale preparation of highly hydrophilic PAN fibers, as well as for the further functionalization of the active sites on the fiber surface.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163908"},"PeriodicalIF":6.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144500843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-situ constructed MoOx-TiO2 interfaces with abundant oxygen vacancies for noble metal-free and high-efficiency reverse water-gas shift reaction 原位构建具有丰富氧空位的MoOx-TiO2界面，用于无贵金属、高效的逆水气移位反应

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-06-27 DOI: 10.1016/j.apsusc.2025.163914

Lichen Shao, Yangchen Wu, Yuxian Jiang, Guiyu Huang, Dongxu Wang, Jiancong Liu

{"title":"In-situ constructed MoOx-TiO2 interfaces with abundant oxygen vacancies for noble metal-free and high-efficiency reverse water-gas shift reaction","authors":"Lichen Shao, Yangchen Wu, Yuxian Jiang, Guiyu Huang, Dongxu Wang, Jiancong Liu","doi":"10.1016/j.apsusc.2025.163914","DOIUrl":"10.1016/j.apsusc.2025.163914","url":null,"abstract":"<div><div>Interfacial modulation of transition metal oxide composites without noble metal is of great importance for CO<sub>2</sub> hydrogenation catalytic efficiency. Herein, we propose a heterogeneous interface engineering strategy to prepare the MoO<sub>x</sub>-TiO<sub>2</sub> heterojunction catalyst with enhanced oxygen vacancy (O<sub>V</sub>), which shows outstanding catalytic performance in the reverse water–gas shift (RWGS) reaction. MoO<sub>3</sub>-TiO<sub>2</sub> heterojunction precursor is constructed by an in-situ solvent-thermal method. The electron transfer from TiO<sub>2</sub> to MoO<sub>3</sub> promotes the reduction of MoO<sub>3</sub>, contributing to the formation of the MoO<sub>x</sub>-TiO<sub>2</sub> heterojunction interface rich in O<sub>V</sub> and then facilitating the adsorption and activation of CO<sub>2</sub>. The catalyst shows excellent catalytic activity with a CO yield of 452.6 mmol g<sup>−1</sup> h<sup>−1</sup> at 400 °C. This performance is significantly improved over that of the MoO<sub>x</sub> catalyst and superior to many reported Mo-based non-noble metal catalyst systems. In this study, the effective modulation of O<sub>V</sub> of transition-metal oxides is realized by heterojunction engineering, which provides a new design paradigm for the development of high-efficiency CO<sub>2</sub> conversion catalysts.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"710 ","pages":"Article 163914"},"PeriodicalIF":6.3,"publicationDate":"2025-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144516102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0