Applied Surface Science最新文献

{"title":"Electrochemical reduction-induced oxygen vacancies in high-mass-loading NiCo2O4 nanosheets on carbon cloth for high-performance flexible solid-state supercapacitors","authors":"Yunjian Chen, Mohammad Noor-A-Alam, Ni Wang, Michael Nolan, Suresh C. Pillai, Wencheng Hu","doi":"10.1016/j.apsusc.2026.168867","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.168867","url":null,"abstract":"The high mass-loading interconnected architecture nanosheets of oxygen-vacancy-related defects mixed spinel NiCo<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">4</ce:inf> grown on the carbon cloth (NCO-0.9@CC) were synthesized through a simple and cost-effective hydrothermal procedure and thermal annealing, followed by a mild, room-temperature electrochemical reduction under ambient atmosphere. DFT simulations and experimental results indicate that oxygen-vacancy-related defects can modify the electronic structure and are expected to facilitate charge transfer during redox reactions. The binder-free NCO-0.9@CC electrode delivers a maximum area capacity of 1.57mAh cm<ce:sup loc=\"post\">−2</ce:sup> and maintains 0.79mAh cm<ce:sup loc=\"post\">−2</ce:sup> (50.3%) of initial capacity from 1 to 50 mA cm<ce:sup loc=\"post\">−2</ce:sup>. In addition, the flexible asymmetric supercapacitor with PVA-KOH electrolyte was assembled by employing NCO-0.9@CC (positive) and Fe<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>@CC (negative) electrodes. The as-assembled flexible device exhibits 4.71mAh cm<ce:sup loc=\"post\">−3</ce:sup> at 1 mA cm<ce:sup loc=\"post\">−2</ce:sup> within 0–1.5 V, energy density up to 3.5 mWh cm<ce:sup loc=\"post\">−3</ce:sup> when the power density is 6.1 mW cm<ce:sup loc=\"post\">−3</ce:sup>, impressive cycle performance with 90.8% retention after cyclic test and no obvious performance degradation at different bending angles. Herein, this material could be a promising candidate for wearable electronics.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"11 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358639","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}

{"title":"Study on carbonate anion intercalation performance and alkali reduction mechanism of CaFe-based layered double hydroxides in soda saline-alkaline soil","authors":"Si–Han Wei,&nbsp;Shuang Wu,&nbsp;Yu–Xin Mei,&nbsp;Li–Kai Yan","doi":"10.1016/j.apsusc.2026.168869","DOIUrl":"10.1016/j.apsusc.2026.168869","url":null,"abstract":"<div><div>Layered double hydroxides (LDHs) offer promising potential for soil remediation applications, yet the structure–property relationships governing their anion intercalation performance remain insufficiently understood. Herein, the intrinsic anion (CO₃^2–) intercalation mechanisms for CaFe-based LDHs relevant to alkalinity reduction in soda saline-alkali soil were systematically investigated using density functional theory (DFT) calculations and ab initio molecular dynamics (AIMD) simulations. For studied Ca_xFe_y-LDH, CO₃^2– intercalation capacity depends on the type of metal cations and molar ratio of divalent-to-trivalent metal cations. The LDH with Ca : Fe molar ratio of 2 : 1 exhibits optimal CO₃^2– intercalation with Δ<em>G</em> of −1.91 eV. Partial Mg²⁺ substitution for Ca²⁺ (maintaining 2 : 1 divalent-to-trivalent ratio) further enhances CO₃^2– intercalation, with Ca : Mg : Fe = 1 : 1 : 1 achieving the most negative Δ<em>G</em> (–2.12 eV). This enhancement correlates with maximal electron transfer (1.73 <em>e</em>) and short hydrogen bond with partial proton transfer (1.18 Å). The partial substitution of Fe³⁺ by Al³⁺ with the Ca : Al : Fe ratio of 4 : 1 : 1 possesses superior intercalation performance. This work demonstrates that the CO₃^2– intercalation performance is governed by the metal cation composition, providing a design strategy for high-performance LDHs for soda saline-alkaline soil remediation.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"755 ","pages":"Article 168869"},"PeriodicalIF":6.6,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358638","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}

{"title":"Isovalent doping engineering enables high-sensitivity and ultralow-detection-limit X‑ray detection in Nd:YVO4 oxide single crystal","authors":"Chenyu Tao, Shuai Li, Mengfan Xu, Xinrui Zhao, Zeliang Gao, Wenxiang Mu, Yang Li","doi":"10.1016/j.apsusc.2026.168868","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.168868","url":null,"abstract":"Direct X-ray detectors featuring compact architecture, short signal transduction pathways, nondestructive testing, and security inspection. Oxide single crystals, with their superior chemical stability and mature growth technology, are promising candidates, yet their detection performance is often limited by insufficient carrier transport. Here, we demonstrate a fixed, isovalent Nd<ce:sup loc=\"post\">3+</ce:sup> doping level (0.33 at%) suffices to markedly improve the direct X-ray detection performance of YVO<ce:inf loc=\"post\">4</ce:inf> single crystals grown by the Czochralski method. Nd<ce:sup loc=\"post\">3+</ce:sup> substitution induces slight lattice expansion and modulates the local electronic structure, markedly improving the carrier mobility–lifetime product (5.01 × 10<ce:sup loc=\"post\">-3</ce:sup> cm<ce:sup loc=\"post\">2</ce:sup> V<ce:sup loc=\"post\">−1</ce:sup>) while maintaining an ultrahigh resistivity of 2.47 × 10<ce:sup loc=\"post\">14</ce:sup> Ω cm along the (1<ce:hsp sp=\"0.12\"></ce:hsp>0<ce:hsp sp=\"0.12\"></ce:hsp>0) direction. Owing to the pronounced anisotropic transport, the (1<ce:hsp sp=\"0.12\"></ce:hsp>0<ce:hsp sp=\"0.12\"></ce:hsp>0)-oriented Nd:YVO<ce:inf loc=\"post\">4</ce:inf> detector outperforms the (0<ce:hsp sp=\"0.12\"></ce:hsp>0<ce:hsp sp=\"0.12\"></ce:hsp>1)-oriented and the undoped YVO<ce:inf loc=\"post\">4</ce:inf> device, delivering a high sensitivity of 269 μC Gy<ce:inf loc=\"post\">air</ce:inf><ce:sup loc=\"post\">-1</ce:sup> cm<ce:sup loc=\"post\">−2</ce:sup>, an ultralow detection limit of 6.13 nGy<ce:inf loc=\"post\">air</ce:inf> s⁻<ce:sup loc=\"post\">1</ce:sup> (well below the medical diagnostic standard of 5.5 μGy<ce:inf loc=\"post\">air</ce:inf> s<ce:sup loc=\"post\">−1</ce:sup>), and negligible performance degradation after 90 days of storage under 40 keV X-ray irradiation. These results establish rare-earth doping as an effective strategy for tailoring the electronic structure and anisotropic transport of oxide crystals, offering a new route to high-performance direct X-ray detection materials.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"44 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358642","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}

{"title":"Similarity degree descriptor for screening the hydrogen evolution reaction of dual atom catalysts on N-doped grazyne support","authors":"Cong Wang, Francesc Viñes, Pablo Gamallo","doi":"10.1016/j.apsusc.2026.168870","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.168870","url":null,"abstract":"Constructing highly efficient, stable, and economic electrocatalysts for hydrogen evolution reaction (HER) is essential in the sustainable energy field, yet remains a long-standing challenge, hindered by the need to replace top-tier performing platinum (Pt). Dual atom catalysts (DACs) have received extensive attention due to their high dispersion and synergistic dual-site effects. By using density functional theory, we explored HER performance of 56 DACs formed by transition metal atoms supported on nitrogen-doped grazyne. Their HER performance activity is compared to Pt(111) reference surface using the newly introduced similarity degree descriptor, δ, which quantifies the Gibbs free energy profile deviation between DACs and Pt(111) surface. Pt-similar DACs with smallest δ values are ScV, TiV-H<ce:inf loc=\"post\">2</ce:inf>, FeZn, CoZn, and CuZn for Volmer-Tafel mechanism, and CoCo, ScV, TiV, FeZn, CoZn, and CuZn for Volmer-Heyrovsky mechanism, being excellent, economic materials for HER electrocatalysis. Both mechanisms yield consistent trends, confirming the robustness of the δ descriptor. Furthermore, a volcano-type correlation is found between the required overpotential, η, and δ, providing a practical tool for screening and optimizing DACs with tailored HER activity and of general use to other electrocatalysts and reactions, independent of the employed methodology so far there is a reference electrocatalysts to beat.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"11 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358637","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}

{"title":"Selective flotation of ilmenite from titanaugite using 4-tert-butylcatechol under near-neutral conditions","authors":"Min Wei,&nbsp;Jiale Sun,&nbsp;Runqing Liu,&nbsp;Pan Chen,&nbsp;Wei Sun,&nbsp;Yijun Cao,&nbsp;Hongbin Wang","doi":"10.1016/j.apsusc.2026.168877","DOIUrl":"10.1016/j.apsusc.2026.168877","url":null,"abstract":"<div><div>Efficient flotation separation of ilmenite from titanaugite remains challenging because sodium oleate requires acidic conditions, leading to high acid consumption. Herein, 4-<em>tert</em>-butylcatechol (4-TBC) was investigated as a collector for the selective flotation of ilmenite from titanaugite under near-neutral conditions. At a collector concentration of 2 × 10⁻⁴ M, 4-TBC achieved an ilmenite recovery of 86.19%, 72 percentage points higher than that of titanaugite at pH 7 ± 0.5. Artificial mixed-mineral flotation further yielded a titanium concentrate with a TiO₂ grade of 44.78% and a recovery of 85.34% at pH 6 ± 0.5. Surface analyses demonstrated the preferential adsorption of 4-TBC on ilmenite through selective interaction with surface Fe³⁺ active sites via hydrogen bonding and interfacial electronic interactions. DFT calculations further revealed that shorter Fe-O interfacial contacts, stronger interfacial interactions, and greater charge transfer on Fe sites than on Mg sites governed its superior selectivity. These findings elucidate the electronic origin of the selective adsorption of 4-TBC and provide a useful reference for the future development of industrially applicable catechol-based collectors for selective ilmenite flotation.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"755 ","pages":"Article 168877"},"PeriodicalIF":6.6,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358635","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}

{"title":"Surface-engineered Cu/Ni-metallized porous polyimide film with wrinkled inner walls for corrosion-resistant flexible electromagnetic interference shielding","authors":"Shu Wen, Xiao Wang, Shi Liu, Tonghao Zhou, Shuting Hu, Zhenya Luo, Chao Zeng, Junan Pan","doi":"10.1016/j.apsusc.2026.168866","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.168866","url":null,"abstract":"Surface-engineered metallized polymer films exhibit promising prospects in the field of flexible electromagnetic interference (EMI) shielding. However, achieving uniform internal metal deposition, high shielding efficiency, mechanical flexibility, and corrosion resistance simultaneously remains a challenge. Herein, a wrinkle-engineered porous polyimide film/Cu/Ni (PIF/Cu/Ni) composite was fabricated by hot pressing, vacuum-assisted electroless Cu deposition, and ultrafast bilateral Ni electroplating. Hot pressing converted pristine PI foam into a porous PI film with wrinkled inner walls, thereby increasing the effective surface area for metal deposition and creating abundant internal reflection sites for electromagnetic waves. Vacuum-assisted electroless plating enabled uniform Cu coating throughout the complex three-dimensional PIF skeleton, whereas short-duration Ni electroplating generated a gradient protective shell with detectable Ni deposition inside the porous network. The optimized PIF/Cu/Ni film exhibits a conductivity as high as 10<ce:sup loc=\"post\">5</ce:sup> S m<ce:sup loc=\"post\">−1</ce:sup> and demonstrates a minimal change in resistance even after continuous and severe mechanical deformation. Moreover, PIF/Cu/Ni provides ultrahigh X-band EMI shielding performance of approximately 111 dB and exhibits excellent corrosion resistance with a corrosion current density of 5.93 × 10<ce:sup loc=\"post\">-5</ce:sup> A cm<ce:sup loc=\"post\">−2</ce:sup>. This work provides insights for the development of such metallized porous films in scalable fabrication, long-term environmental stability and integration with practical flexible electronic systems.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"21 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358640","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}

{"title":"Pd-based single-atom alloys reveal a transferable descriptor for nitrogen electroreduction","authors":"Yunfan Wang, Guozheng Wang, Yiyan Zhu, Borui Feng, Chenyu Xia, Xinyi Liu, Hao Sun, Igor Ying Zhang, Min Fang, Wei Liu","doi":"10.1016/j.apsusc.2026.168874","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.168874","url":null,"abstract":"Developing efficient catalysts for the electrochemical nitrogen reduction reaction (NRR) remains challenging because the large compositional space of candidate materials makes rapid and reliable screening difficult. Herein, using spin-polarized density functional theory (DFT) calculations, we establish a descriptor-based strategy for screening single-atom alloys (SAAs) toward NRR. A total of 25 M/Pd(111) SAAs containing isolated 3d, 4d, and 5d transition-metal dopants were investigated to clarify how single-atom substitution regulates N<ce:inf loc=\"post\">2</ce:inf> activation, intermediate stabilization, and competition with the hydrogen evolution reaction. Feature analyses identify Bader charge transfer, the N-N bond length, the dopant atomic radius, and the electronegativity of the host metal as the most influential variables associated with NRR energetics. These features are integrated into a transferable activity descriptor that identifies Os/Pd(111) as the Pd-based SAA with the most favorable NRR thermodynamics. The descriptor is further validated on SAAs supported by Au, Cu, Re, and Ag, achieving an R<ce:sup loc=\"post\">2</ce:sup> of 0.81, even though the Ag-supported systems follow a different potential-determining step. Moreover, Mo/Au(111), predicted as a promising non-Pd candidate, is further validated by independent DFT calculations. This physically interpretable framework enables descriptor-guided screening and rational design of single-atom alloy surfaces for electrochemical nitrogen reduction.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"15 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358632","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}

{"title":"Decoupling bulk and interface defects in Ar/O2 plasma-treated SiO2/a-IGZO thin-film transistors by AC transconductance and photoinduced current transient spectroscopy","authors":"Min Jung Kim, Teklebrahan Gebrekrstos Weldemhret, Kwangsik Jeong, Kwun-Bum Chung","doi":"10.1016/j.apsusc.2026.168855","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.168855","url":null,"abstract":"Quantitative characterization of bulk and interface defects remains a major challenge in amorphous oxide semiconductors (AOSs) because existing characterization methods cannot independently resolve their contributions. Here, we adapt an AC transconductance methodology for direct interface-trap characterization in AOS thin-film transistors and combine it with photoinduced current transient spectroscopy to decouple interface and bulk defects. Applied to indium − gallium − zinc oxide (a-IGZO) transistors on SiO<ce:inf loc=\"post\">2</ce:inf> gate insulators (GIs) treated with Ar/O<ce:inf loc=\"post\">2</ce:inf> plasma at 0, 20, 35, and 50 W, we show that the GI influences defect formation: its structure and chemistry determine bulk defect distribution in a-IGZO. Untreated GIs produce bulk and interface defects, yielding lower performance: field-effect mobility (µ<ce:inf loc=\"post\">FE</ce:inf>) = 14.5 cm<ce:sup loc=\"post\">2</ce:sup>/Vs, positive bias-stress (PBS) shift = 2.54 V, negative bias-stress (NBS) shift = -0.40 V. At optimal power (20 W), shallow bulk and interface defects are passivated without generating deep traps, yielding the highest µ<ce:inf loc=\"post\">FE</ce:inf> (30.6 cm<ce:sup loc=\"post\">2</ce:sup>/Vs) and minimal PBS (0.99 V) and NBS (−0.01 V) instabilities. At higher power (50 W), ∼80% of shallow bulk defects are passivated, while the deep bulk-defect density increases, reducing µFE to 0.05 cm<ce:sup loc=\"post\">2</ce:sup>/Vs and degrading device reliability. This work presents a framework to decouple bulk and interface defects and guide GI engineering in AOSs.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"11 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358652","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}

{"title":"Synergistic strategy of K doping and N defect modulation in tubular g-C3N4 for oxidation-driven photocatalytic degradation of organic pollutants","authors":"Jiayi Wang, Penggang Ren, Ying Zhang, Zihang Cai, Zhengyan Chen, Zhengzheng Guo, Zhenfeng Sun, Yanling Jin","doi":"10.1016/j.apsusc.2026.168862","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.168862","url":null,"abstract":"Graphitic carbon nitride (g-C<ce:inf loc=\"post\">3</ce:inf>N<ce:inf loc=\"post\">4</ce:inf>) exhibits exciting potential for the photocatalytic degradation of pollutants owing to its narrow band gap, visible light activity and cost-effectiveness. However, pristine g-C<ce:inf loc=\"post\">3</ce:inf>N<ce:inf loc=\"post\">4</ce:inf> suffers from short photogenerated carrier lifetimes and insufficient oxidative ability, resulting in low photocatalytic activity. Herein, K doping and N defects is simultaneously incorporated into tubular g-C<ce:inf loc=\"post\">3</ce:inf>N<ce:inf loc=\"post\">4</ce:inf> (K-TCN<ce:inf loc=\"post\">x</ce:inf>) via a combined strategy of precursor pre-assembly technology and K<ce:inf loc=\"post\">2</ce:inf>S<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf> melt-assisted thermal etching. Attributed to the synergistic effects of the tubular structure, K doping, and N defects, the carrier separation and transfer efficiency has been enhanced, the valence band position progressively shifts downward (from 1.69 eV to 2.10 eV) and the bandgap of K-TCN<ce:inf loc=\"post\">x</ce:inf> narrows as K doping and N defect concentrations increase. These unique synergistic effects endow the resultant K-TCN<ce:inf loc=\"post\">x</ce:inf> with outstanding photocatalytic efficiencies for methylene blue (90.67%), Rhodamine B (94.61%), Erythrosine Y (93.38%), and tetracycline (81.85%). This work proposes a mild and efficient strategy to enhance the oxidation ability of g-C<ce:inf loc=\"post\">3</ce:inf>N<ce:inf loc=\"post\">4</ce:inf> for photocatalytic degradation of organic pollutants.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"23 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358648","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}

{"title":"MWCNTs/WO3 heterostructured hollow microspheres for ultrasensitive acetone gas detection","authors":"Longyun Li, Ying He, Tao Wang, Zhiqiang Xu, Yumin Zhang, Genlin Zhang, Zhongqi Zhu, Qingju Liu, Jin Zhang","doi":"10.1016/j.apsusc.2026.168853","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.168853","url":null,"abstract":"Acetone, a critical biomarker in exhaled breath for the diagnosis of diabetes, necessitates the development of high-performance gas sensors for real-time monitoring. In this paper, multi-walled carbon nanotubes (MWCNTs) modified hierarchical hollow WO<ce:inf loc=\"post\">3</ce:inf> microspheres were prepared by a simple liquid-phase compositing strategy and applied to acetone gas detection. The optimized 0.5-MW sensor showed a response value of 142 toward acetone gas of 10 ppm at 250 °C. It exhibited response/recovery times of 47/54 s, along with LOD down to 52 ppb. Compared with pristine WO<ce:inf loc=\"post\">3</ce:inf>, the 0.5-MW sensor reduced the optimum working temperature by approximately 100 °C and enhanced the response by about 6.76-fold. Combining structure and morphology characteristics and density functional theory calculations suggested that the heterojunction established with WO<ce:inf loc=\"post\">3</ce:inf> and MWCNTs promotes charge migration at the interface, increasing the density of oxygen vacancies. These synergistic effects endow MWCNTs/WO<ce:inf loc=\"post\">3</ce:inf> hollow microspheres with outstanding acetone-sensing performance, providing an effective interface-engineering strategy for developing breath-analysis sensors toward real-time, noninvasive diabetes monitoring.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"21 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149358671","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}