Applied Surface Science最新文献_第7页

Periodic array structures for MoO3/Ag composites: improving the stability and uniformity for enhanced SERS performance 用于 MoO3/Ag 复合材料的周期阵列结构：提高稳定性和均匀性以增强 SERS 性能

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-04-24 DOI: 10.1016/j.apsusc.2025.163348

Shuang Guo , Yoonseop Byun , Eunsoo Song , Eungyeong Park , Sujin Lee , Yeonju Park , Lei Chen , Young Mee Jung

{"title":"Periodic array structures for MoO3/Ag composites: improving the stability and uniformity for enhanced SERS performance","authors":"Shuang Guo , Yoonseop Byun , Eunsoo Song , Eungyeong Park , Sujin Lee , Yeonju Park , Lei Chen , Young Mee Jung","doi":"10.1016/j.apsusc.2025.163348","DOIUrl":"10.1016/j.apsusc.2025.163348","url":null,"abstract":"<div><div>Surface-enhanced Raman scattering (SERS) has attracted considerable attention for its ability to provide molecular fingerprint information with remarkable sensitivity, which makes it a powerful and nondestructive detection technique. In this study, SERS substrates were fabricated by sequentially depositing Ag and molybdenum trioxide (MoO<sub>3</sub>) layers onto hexagonally close-packed polystyrene (PS) spheres via radiofrequency magnetron sputtering in an argon plasma atmosphere. The SERS performance of the fabricated MoO<sub>3</sub>/Ag/PS films was evaluated by using 4-mercaptobenzoic acid (4-MBA) as a probe molecule. Notably, the SERS intensity of 4-MBA on the MoO<sub>3</sub>/Ag/PS substrate remained largely unchanged compared with that on the Ag/PS substrate, despite the increased adsorption distance between the adsorbed molecules and Ag particles, regardless of the excitation light irradiation. These substrates demonstrated high sensitivity and uniformity, achieving a detection limit of 9.5 × 10<sup>-9</sup> M with a relative standard deviation of 5.25 %. Furthermore, the addition of a MoO<sub>3</sub> layer significantly enhanced the storage stability of the substrates by effectively decreasing oxidation of the Ag surface. As a result, the MoO<sub>3</sub>/Ag/PS films, combining long-term stability with uncompromised detection sensitivity, exhibit excellent potential for high-sensitivity chemical and biological sensing applications. This study introduces a novel experimental approach and lays the foundation for further advancements in SERS substrate research and development.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"702 ","pages":"Article 163348"},"PeriodicalIF":6.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872383","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

High-Performance wearable flexible humidity sensor based on plasma-treated graphene oxide for medical monitoring and non-contact sensing 基于等离子处理氧化石墨烯的高性能可穿戴柔性湿度传感器，用于医疗监测和非接触传感

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-04-24 DOI: 10.1016/j.apsusc.2025.163349

Bin He , Wenjie Xia , Yifan Deng , Jinxin Wu , Zikai Guo , Zhiyuan Wang , Boyu Zhang , Yi Feng

{"title":"High-Performance wearable flexible humidity sensor based on plasma-treated graphene oxide for medical monitoring and non-contact sensing","authors":"Bin He , Wenjie Xia , Yifan Deng , Jinxin Wu , Zikai Guo , Zhiyuan Wang , Boyu Zhang , Yi Feng","doi":"10.1016/j.apsusc.2025.163349","DOIUrl":"10.1016/j.apsusc.2025.163349","url":null,"abstract":"<div><div>Graphene oxide (GO) is a humidity sensitive material commonly used in the manufacture of humidity sensors. However, GO-based humidity sensors still face issues such as low sensitivity, slow humidity response speed and poor stability in practical applications. In this paper, a flexible humidity sensor based on plasma graphene oxide (P-GO) was introduced, which used plasma-modified GO film as the humidity-sensitive layer, laser-induced graphene (LIG) with fork-finger structure as the electrode layer, and polydimethylsiloxane (PDMS) as the flexible substrate. It was found that the surface water contact angle of the P-GO film treated with plasma for 180 s decreased from 50° to 10°, reaching a superhydrophilic state. The sensitivity of the flexible humidity sensor based on P-GO was improved by nearly 10 times higher than that of the GO sensor. The mechanism was that the surface of the P-GO film was rougher and the relative contents of the surface oxygen-containing functional groups C-O and C=O increased by 6.28 % and 8.49 %, respectively. Meanwhile, the P-GO-based flexible humidity sensor was found to be able to perform a stable and sensitive response over a wide relative humidity range of 7 %∼97 %, possessing a response/recovery speed of 15 s/9s and exhibiting high stability over 60 days. In addition, the P-GO-based flexible humidity sensor was applied for breath detection and non-contact detection, and was found to have a large potential for application in the medical monitoring field.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"702 ","pages":"Article 163349"},"PeriodicalIF":6.3,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872351","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

Detection of multiple biometabolite molecules by SPR-SERS dual-functional biosensors based on highly sensitive ridge Hyperbolic Metamaterials 基于高灵敏度脊型双曲超材料的SPR-SERS双功能生物传感器检测多种生物代谢物分子

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-04-23 DOI: 10.1016/j.apsusc.2025.163338

Enze Lv , Xinzhao Yue , Tao Wang, Huimin Wang, Jinwei Zeng, Wenyu Zhao, Jian Wang

{"title":"Detection of multiple biometabolite molecules by SPR-SERS dual-functional biosensors based on highly sensitive ridge Hyperbolic Metamaterials","authors":"Enze Lv , Xinzhao Yue , Tao Wang, Huimin Wang, Jinwei Zeng, Wenyu Zhao, Jian Wang","doi":"10.1016/j.apsusc.2025.163338","DOIUrl":"10.1016/j.apsusc.2025.163338","url":null,"abstract":"<div><div>Disease can be predicted by monitoring the concentration of metabolite molecules in human body fluids, but the current detection methods have problems such as low detection sensitivity, and they can only provide a simple piece of information, which is prone to false positives and lead to incorrect judgments. Therefore, it is essential to design a dual-functional biosensor with high sensitivity that can provide comprehensive data. In order to solve the above problems, we designed and prepared the Au-ridge Hyperbolic Metamaterials (HMMs) SPR-SERS dual-functional biosensor. Experiments and theoretical simulations have demonstrated that the dual-functional biosensor possesses both high sensitivity SPR and SERS detection capabilities, with a bulk sensitivity of 6667 nm/RIU and the SERS detection limit of 10<sup>−13</sup> M. Furthermore, the dual-functional biosensor is highly responsive to a wide range of metabolite molecules. Finally, we used this dual-functional biosensor to obtain high-contrast SPR and SERS signals for low concentrations of urea and uric acid solutions. We believe that this dual-functional biosensor can provide a more reliable platform for the monitoring of metabolite molecules.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"702 ","pages":"Article 163338"},"PeriodicalIF":6.3,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143866280","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

Ultrasensitive H2S sensor based on Cu2O/Graphene heterostructures at room temperature 室温下基于Cu2O/石墨烯异质结构的超灵敏H2S传感器

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-04-23 DOI: 10.1016/j.apsusc.2025.163339

Zongxu Liu , Jiaxue Song , Tao Wang , Huaiqiang Liu , Jie Chen , Yuanyuan Sun , Pinhua Zhang , Guangliang Cui

{"title":"Ultrasensitive H2S sensor based on Cu2O/Graphene heterostructures at room temperature","authors":"Zongxu Liu , Jiaxue Song , Tao Wang , Huaiqiang Liu , Jie Chen , Yuanyuan Sun , Pinhua Zhang , Guangliang Cui","doi":"10.1016/j.apsusc.2025.163339","DOIUrl":"10.1016/j.apsusc.2025.163339","url":null,"abstract":"<div><div>Technology development of low-concentration H<sub>2</sub>S sensing at low temperatures is of great significance for real-time surveillance of specific diseases and environment. In this work, a new Cu<sub>2</sub>O/graphene heterojunction sensor with an ideal interface is fabricated by 2D electrodeposition in-situ assembly method. The sensor is extremely selective to H<sub>2</sub>S and exhibits ultra-high H<sub>2</sub>S sensing properties at room temperature (R = 24125.785 % for 500 ppb H<sub>2</sub>S). Notably, the synergistic effects of barrier modulation and the sulfide reaction enable the sensor to detect H<sub>2</sub>S at concentrations as low as 5 ppb (R = 386 %) at 20 °C. Moreover, it exhibited good gas sensitivity even at temperatures as low as −20 °C (R = 71.26346 % for 100 ppb H<sub>2</sub>S). Furthermore, a sensor device was successfully manufactured for practical detection, which could be used for rapid detection of exhaled air and atmospheric monitoring. This work provides a new strategy for the design of high-sensitive and reliable room-temperature sensing materials for trace H<sub>2</sub>S gas detection.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"702 ","pages":"Article 163339"},"PeriodicalIF":6.3,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143866281","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

Elastic electrospun membrane with stable temperature and humidity fluorescence performance for metal dust detection 具有稳定温湿度荧光性能的弹性电纺丝膜用于金属粉尘检测

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-04-23 DOI: 10.1016/j.apsusc.2025.163337

Chunyan Xu, LingBo Hao, Xuecheng Wang, Xiaoyan Zhao, Chenyi Wang, Xiao Zhu

{"title":"Elastic electrospun membrane with stable temperature and humidity fluorescence performance for metal dust detection","authors":"Chunyan Xu, LingBo Hao, Xuecheng Wang, Xiaoyan Zhao, Chenyi Wang, Xiao Zhu","doi":"10.1016/j.apsusc.2025.163337","DOIUrl":"10.1016/j.apsusc.2025.163337","url":null,"abstract":"<div><div>Metal dust prevention and control is the safety guarantee for industrial production. In order to effectively improve the stability and portability of detection, fluorescent polyimide with excellent thermal stability (thermal decomposition temperature around 400 °C in air) and solubility was synthesized. Specifically, the pyrene units were introduced into the molecule chain as the side groups, endowed the polymer with good processability. The dimensional stability of the detector is an important factor affecting the sensitivity and reusability. Therefore, polymers with different morphologies were composited onto polyurethane membranes. The results showed that polyimide dispersed evenly on the substrate layer had the excellent fluorescence and mechanical performance. The repeated tensile strain and strength of optimized membrane could reach 350 % and 3.5 MPa, respectively. Furthermore, the influence of humidity on the fluorescence of membrane was relatively small, which was attributed to the waterproof performance of the sample. In response to metal dust, the sample appeared a significant fluorescence enhancement effect on Fe dust. Compared with the high-precision commercial instrument, our fiber detector is not only effective but also have the advantage of real-time monitoring. This work provides a way for the visualization of metal dust recognition sensor with flexible and wearable in the future.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"702 ","pages":"Article 163337"},"PeriodicalIF":6.3,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143866283","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

Facile fabrication of atomically dispersed iron through the nanoconfined environment for phenol hydroxylation 通过纳米限制环境制备原子分散铁以进行酚羟基化

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-04-23 DOI: 10.1016/j.apsusc.2025.163333

Yang Wang , Ying Zhou , Xiao-Qin Zheng , Kai Zhang , Yang Liu , Xuan-Yi Liu , Xiao Yang , Zhijun Xu , Jiahui Kou , Lin-Bing Sun

{"title":"Facile fabrication of atomically dispersed iron through the nanoconfined environment for phenol hydroxylation","authors":"Yang Wang , Ying Zhou , Xiao-Qin Zheng , Kai Zhang , Yang Liu , Xuan-Yi Liu , Xiao Yang , Zhijun Xu , Jiahui Kou , Lin-Bing Sun","doi":"10.1016/j.apsusc.2025.163333","DOIUrl":"10.1016/j.apsusc.2025.163333","url":null,"abstract":"<div><div>Diphenols constitute a class of chemical compounds with diverse applications, and the contemporary method for diphenol synthesis involves the hydroxylation of phenol with a catalyst. The catalysts with Fe sites serve as the active centers for the phenol hydroxylation reaction, with their activity being influenced by both the quantity of Fe sites and their degree of dispersion. However, it is still difficult to prepare highly dispersed Fe sites catalysts at the atomic level by facile methods. Here, we provide a convenient methodology to prepare Fe single-atom catalyst (SAC) by utilizing the nanoconfined environment between the template and silica walls in template-occupied mesoporous silica KIT-6. Through solid-phase milling and calcination, Fe precursors were introduced into the nanoconfined environment to form the Fe-O-Si structure. In the phenol hydroxylation reaction, Fe SAC activity was significantly increased compared to the comparison sample prepared without the nanoconfined environment as well as various reported catalysts.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"702 ","pages":"Article 163333"},"PeriodicalIF":6.3,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864913","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

2D Novel o-B2N2 supported single-atom catalysts: Multifunctional activity in Hydrogen/Oxygen electrocatalysis 2D新型o-B2N2负载单原子催化剂：氢/氧电催化的多功能活性

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-04-23 DOI: 10.1016/j.apsusc.2025.163335

Chunling Zhang , Xunzhe Zhang , Baonan Jia , Xinhui Zhang , Ge Wu , Jinbo Hao , Pengfei Lu

{"title":"2D Novel o-B2N2 supported single-atom catalysts: Multifunctional activity in Hydrogen/Oxygen electrocatalysis","authors":"Chunling Zhang , Xunzhe Zhang , Baonan Jia , Xinhui Zhang , Ge Wu , Jinbo Hao , Pengfei Lu","doi":"10.1016/j.apsusc.2025.163335","DOIUrl":"10.1016/j.apsusc.2025.163335","url":null,"abstract":"<div><div>The development of multifunctional electrocatalysts capable of driving hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR) is critical for advancing energy conversion technologies. Herein, we propose two dimensional (2D) orthorhombic diboron dinitride (o-B<sub>2</sub>N<sub>2</sub>), a new boron nitride allotrope, as innovative support for single-atom catalysts (SACs) through first-principles simulations. Findings reveal that Rh@B<sub>2</sub>N<sub>2</sub> achieves ultralow overpotentials for HER (0.17 V), ORR (0.58 V), and OER (0.26 V), which can serve as multifunctional SACs. Ru@B<sub>2</sub>N<sub>2</sub> and Mn@B<sub>2</sub>N<sub>2</sub> demonstrate Pt-comparable HER activity, while Fe@B<sub>2</sub>N<sub>2</sub> and Co@B<sub>2</sub>N<sub>2</sub> exhibit superior ORR (0.38 V) and OER (0.43 V) efficiencies, respectively. Taking ORR reaction occurring on Rh@B<sub>2</sub>N<sub>2</sub> and Fe@B<sub>2</sub>N<sub>2</sub> as an example, effects of different metal centers on reaction pathways and thermodynamic barrier are elucidated. Scaling relations and volcano diagrams were employed to systematically depict electrocatalytic activity trends towards HER/OER/ORR. Mechanisms analysis identifies the d-band center (ε<sub>d</sub>) and d-electron number (N<sub>d</sub>) can quantitatively describe the HER/OER/ORR activity. Additionally, integral crystal orbital Hamiltonian population (ICOHP) demonstrates significant potential as a quantitative descriptor for ORR/OER. This work not only introduces o-B<sub>2</sub>N<sub>2</sub> as a versatile SACs support but also provides guidance for rational design of B<sub>2</sub>N<sub>2</sub>-based electrocatalysts.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"702 ","pages":"Article 163335"},"PeriodicalIF":6.3,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143866279","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

Growth mechanism of plasma electrolytic oxidation coating of Zr alloys revealed by layer-specific phase analyses 层相分析揭示了Zr合金等离子体电解氧化涂层的生长机理

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-04-23 DOI: 10.1016/j.apsusc.2025.163336

Lei Liu , Shuai Dong , Chen Qian , Fulin Wang , Fenghua Wang , Jian Zeng , Li Jin , Xiao-Bo Chen , Jie Dong

{"title":"Growth mechanism of plasma electrolytic oxidation coating of Zr alloys revealed by layer-specific phase analyses","authors":"Lei Liu , Shuai Dong , Chen Qian , Fulin Wang , Fenghua Wang , Jian Zeng , Li Jin , Xiao-Bo Chen , Jie Dong","doi":"10.1016/j.apsusc.2025.163336","DOIUrl":"10.1016/j.apsusc.2025.163336","url":null,"abstract":"<div><div>The characteristic outward and inward growth modes in plasma electrolytic oxidation (PEO) coatings on lightweight alloys have been previously attributed to a surface deposition process of ejected molten materials (ejection-deposition mechanism), and an oxygen inward diffusion process, respectively. In this study, the growth behavior and layer-specific phase of PEO coating on Zr alloys were investigated to elucidate the underlying formation mechanisms. Microstructural characterization reveals compelling evidence for the ejection-deposition mechanism, with distinct deposition layer around a discharge pore, confirming plasma discharge-mediated upward transport of molten materials drives outward coating growth. Meanwhile, the inward growth involves two key processes: (i) plasma discharge-induced localized melting of metal substrate and (ii) electrochemical migration of ionic species. This conclusion is supported by the presence of a Zr-rich (O-poor) molten product, and a pure ZrO<sub>2</sub> layer immediately adjacent to the substrate. Based on these findings, a comprehensive growth mechanism was proposed, encompassing ionic migration, substrate melting, and ejection-deposition processes. Furthermore, the observed phenomena, where increased frequency accelerates coating thickening and prolonged oxidation time enhances inward growth, are well explained by the proposed mechanism.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"702 ","pages":"Article 163336"},"PeriodicalIF":6.3,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143866282","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

Enhancing the steam oxidation reactivity of Zn-Al-Mg alloy-coated steel sheets through heat treatment 通过热处理提高锌铝镁合金涂层钢板的蒸汽氧化反应性

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-04-22 DOI: 10.1016/j.apsusc.2025.163329

Sang-Hee Kim , Sang-heon Kim , Hye-Min Kim , Jun Kang , Myeong-Hoon Lee , Min-Suk Oh , Yong-Sup Yun

{"title":"Enhancing the steam oxidation reactivity of Zn-Al-Mg alloy-coated steel sheets through heat treatment","authors":"Sang-Hee Kim , Sang-heon Kim , Hye-Min Kim , Jun Kang , Myeong-Hoon Lee , Min-Suk Oh , Yong-Sup Yun","doi":"10.1016/j.apsusc.2025.163329","DOIUrl":"10.1016/j.apsusc.2025.163329","url":null,"abstract":"<div><div>Zn-Al-Mg alloy-coated steel sheets are widely used in various industries due to their superior corrosion resistance and mechanical properties. To further enhance their surface properties, steam oxidation treatment has recently gained attention as an eco-friendly method for surface blackening and improving corrosion resistance. However, forming a uniform and dense oxide layer remains challenging due to the heterogeneous microstructure of Zn-Al-Mg coatings. This study investigates the effect of heat treatment as a pre-treatment strategy to improve steam oxidation reactivity. Heat treatment at 300 °C for 10 min, followed by steam oxidation at 140 °C for 1 h, induced a phase transformation from MgZn<sub>2</sub> to the more thermodynamically stable Mg<sub>2</sub>Zn<sub>11</sub>, thereby enhancing surface reactivity. The transformation decreased the contact angle, improving wettability, and increased the oxidation rate, promoting the formation of a thicker and more uniform oxide layer. The improved wettability and increased reaction sites contributed to a more efficient oxidation process. These findings underscore the importance of pre-treatment strategies in optimizing steam oxidation and provide insights into enhancing protective oxide layer formation on Zn-Al-Mg alloy coatings.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"702 ","pages":"Article 163329"},"PeriodicalIF":6.3,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862754","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

Efficient flotation of sodium lauroyl sarcosinate on Pb2+-modified rutile surface: experimental study and DFT calculation Pb2+改性金红石表面高效浮选月桂醇肌酸钠的实验研究及DFT计算

IF 6.3 2区材料科学

Applied Surface Science Pub Date : 2025-04-22 DOI: 10.1016/j.apsusc.2025.163330

Yubin Sun , Shuming Wen , Qicheng Feng , Yanyu Tang , Yongchao Miao , Xu Wang , Zhihao Shen

{"title":"Efficient flotation of sodium lauroyl sarcosinate on Pb2+-modified rutile surface: experimental study and DFT calculation","authors":"Yubin Sun , Shuming Wen , Qicheng Feng , Yanyu Tang , Yongchao Miao , Xu Wang , Zhihao Shen","doi":"10.1016/j.apsusc.2025.163330","DOIUrl":"10.1016/j.apsusc.2025.163330","url":null,"abstract":"<div><div>This work explored the application of sodium lauroyl sarcosinate (SLAS) as a green surfactant in rutile flotation systems. A detailed examination of the flotation behavior and adsorption characteristics of rutile was conducted, particularly under Pb<sup>2+</sup> ion-modified conditions. The experimental methodology incorporated multiple analytical techniques: micro-flotation experiments, surface potential analysis, adsorption quantification, FTIR spectroscopy, SEM-EDS characterization, XPS surface analysis, and computational DFT simulations. Micro-flotation experiments demonstrated that under the optimal conditions (SLAS concentration of 2.8 × 10<sup>−4</sup> mol/L, pH 3), a rutile recovery of 81.49% was obtained. Notably, as the pH increased, the recovery of rutile exhibited a decreasing trend. Following Pb<sup>2+</sup> modification (8.0 × 10<sup>−5</sup> mol/L) combined with SLAS treatment (2.8 × 10<sup>−4</sup> mol/L), the rutile demonstrated consistent flotation recovery exceeding 90.02% across a broad pH range (3∼7). The adsorption capacity experiments and SEM-EDS results indicated that multiple SLAS layers were adsorbed on the rutile. Moreover, Pb<sup>2+</sup> modification improved the favorability of SLAS adsorption. A combination of surface potential measurements and infrared spectroscopy confirmed the chemical adsorption mechanism of SLAS on positively charged rutile surface atoms. XPS characterization confirmed that the SLAS oxygen atoms chemically bonded with the rutile surface Ti/Pb atoms. DFT simulations demonstrated that the adsorption processes were spontaneous, with Pb<sup>2+</sup> and SLAS respectively, forming O−Pb and Ti−O bonds on the (110) surface. This mechanism explains how Pb<sup>2+</sup> enhances the SLAS adsorption capacity and subsequent flotation efficiency of the rutile. These studies proved the industrial potential of environmentally friendly collector SLAS in rutile flotation.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"702 ","pages":"Article 163330"},"PeriodicalIF":6.3,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862789","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