Applied Surface Science最新文献

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Mesh-patterned IZO/Hf-doped IGZO thin film transistors with high mobility and mechanical stability for flexible display
IF 6.7 2区 材料科学
Applied Surface Science Pub Date : 2024-12-19 DOI: 10.1016/j.apsusc.2024.162102
Kang Min Lee, Nahyun Kim, Jin Kyung Lee, Ho Jin Lee, Su Yun Kim, Tae Geun Kim
{"title":"Mesh-patterned IZO/Hf-doped IGZO thin film transistors with high mobility and mechanical stability for flexible display","authors":"Kang Min Lee, Nahyun Kim, Jin Kyung Lee, Ho Jin Lee, Su Yun Kim, Tae Geun Kim","doi":"10.1016/j.apsusc.2024.162102","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162102","url":null,"abstract":"Despite recent improvements in oxide-based thin-film transistors (TFTs), their performance (i.e., mobility and on/off ratio) must be further enhanced and the fabrication temperature must be decreased to enable the practical use of TFTs in flexible applications. Herein, we introduce mesh-patterned indium-zinc oxide (mIZO)/Hf-doped indium-gallium-zinc oxide (Hf:IGZO) heterojunction TFTs that exhibit superior electrical performance and flexibility without requiring high-temperature annealing during fabrication. Hf, readily bonded to the surrounding ion vacancies, is used in the IGZO channel, thereby decreasing the process temperature. Moreover, a mesh pattern is applied to the channel area, which expands the quasi-two-dimensional electron gas region and increases the number of electrons. Additionally, the mesh pattern reduces the stress experienced by the channel layer, providing superior flexibility with respect to those of planar structures. The proposed mIZO/Hf:IGZO heterojunction TFT exhibits remarkably high mobility (∼40 cm<sup>2</sup>/Vs) and on/off ratio (∼10<sup>8</sup>) under a low process temperature (150 °C). Furthermore, an organic light-emitting diode driven by the mIZO/Hf:IGZO heterojunction TFT continued operating even after 1000 bending cycles, confirming the superior flexibility of the proposed TFT. This study presents a novel method to achieve superior performance and mechanical flexibility from oxide-based TFTs without high-temperature processes.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"228 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857543","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
Hydroxyl functionalised 2D/2D Ti2CTx MXene @ g-C3N4 photocatalyst confer selectivity for CO2 reduction to ethanol
IF 6.7 2区 材料科学
Applied Surface Science Pub Date : 2024-12-19 DOI: 10.1016/j.apsusc.2024.162104
Malavika Sunil S, Arunachaleshwar V, Jaffar Ali B.M
{"title":"Hydroxyl functionalised 2D/2D Ti2CTx MXene @ g-C3N4 photocatalyst confer selectivity for CO2 reduction to ethanol","authors":"Malavika Sunil S, Arunachaleshwar V, Jaffar Ali B.M","doi":"10.1016/j.apsusc.2024.162104","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162104","url":null,"abstract":"Production of solar biofuel where CO<sub>2</sub> is reduced to hydrocarbon by harnessing sunlight through photocatalyst has attracted tremendous attention in recent years. In this study, titanium carbide MXene (Ti<sub>2</sub>CT<sub>x</sub>), a noble metal-free co-catalyst, was combined with graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) to make a composite wherein 2D Ti<sub>2</sub>CTx was synthesized following modified MILD process followed by hydrothermal assisted co-polymerization with g-C<sub>3</sub>N<sub>4</sub> resulting in the formation of hydroxyl functionalised Ti<sub>2</sub>C(OH)<sub>2</sub> @ g-C<sub>3</sub>N<sub>4</sub> composite (TiGCN). As Ti<sub>2</sub>C(OH)<sub>2</sub> MXene being an efficient electron-coupled proton donor, the TiGCN exhibited high selectivity for CO<sub>2</sub> adsorption and direct reduction to ethanol. Engineering the selective reduction of CO<sub>2</sub> capability of TiGCN to ethanol, a C2 compound, was facilitated by OH terminalization imparted via ethanol-assisted sono-chemical processing. Our findings reveal that the loading of OH terminalized Ti<sub>2</sub>C(OH)<sub>2</sub> at 0.8 wt% in g-C<sub>3</sub>N<sub>4</sub> resulted in highest photocatalytic CO<sub>2</sub> reduction, yielding 784 µmol gcat<sup>−1</sup>h<sup>−1</sup> of ethanol. We further discuss the possible reaction mechanism of C2 conversion.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"23 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857917","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
Flotation enhancement of spodumene with a β-amino-hydroxamate surfactants
IF 6.7 2区 材料科学
Applied Surface Science Pub Date : 2024-12-19 DOI: 10.1016/j.apsusc.2024.162166
Jing Qi, Jichang Tu, Xian Xie, Hongling Wang, Ruiqi Xie
{"title":"Flotation enhancement of spodumene with a β-amino-hydroxamate surfactants","authors":"Jing Qi, Jichang Tu, Xian Xie, Hongling Wang, Ruiqi Xie","doi":"10.1016/j.apsusc.2024.162166","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162166","url":null,"abstract":"In view of the combination of dodecylamine and hydroxamate can improve the flotation recovery of spodumene, a novel <em>β</em>-amino-hydroxamate surfactant, i.e., <em>N</em>-(3-(dodecylamino)) hydroxamic acid (DAHA), was designed and introduced into spodumene flotation. The micro-flotation performance indicated that DAHA performed excellent collecting ability toward spodumene, and 2.0 × 10<sup>-4</sup> mol/L of DAHA floated out about 90.2 % of spodumene, while that of sodium oleate (NaOL) was only about 57.4 %. The zeta potential of DAHA-treated spodumene revealed the effective chemisorption of hydroxamate group on spodumene surface. FTIR and XPS recommended that the hydroxamate group in DAHA chelated with surface Al sites to form five-membered hydroxamate-(O,O)-Al complexes. The affinity of DAHA on spodumene spontaneously enhanced by the protonated amino group (–NH<sub>3</sub><sup>+</sup>), which facilitated the chelation of hydroxamate with the surface Al atoms and strengthened the hydrophobicity of spodumene.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"64 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857915","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 slurry for ultra-smooth chemical mechanical polishing of TC4 titanium alloy
IF 6.7 2区 材料科学
Applied Surface Science Pub Date : 2024-12-19 DOI: 10.1016/j.apsusc.2024.162167
Longxing Liao, Fuli Cai, Xuefeng Chang, Chengbin Zhao, Jingyu Mo, Jian Shun
{"title":"A novel slurry for ultra-smooth chemical mechanical polishing of TC4 titanium alloy","authors":"Longxing Liao, Fuli Cai, Xuefeng Chang, Chengbin Zhao, Jingyu Mo, Jian Shun","doi":"10.1016/j.apsusc.2024.162167","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162167","url":null,"abstract":"TiC4 titanium alloy has become one of the most important materials for aerospace and medical device applications due to its advantages such as good biocompatibility and high specific strength. However, the high hardness and low thermal conductivity of TiC4 make it challenging to machine. Therefore, a novel chemical mechanical polishing (CMP) slurry for TC4 titanium alloy was developed to achieve its ultra-smooth surface polishing. Firstly, five slurries with different compositions were prepared, and the polishing effect of each slurry was analyzed. The results demonstrate that the slurry containing 2-aminobenzoic acid (2-ANA) as a chelating agent exhibits the best polishing performance with <em>Ra</em> of 0.661 nm and material removal rate of 173.9 nm/min. Subsequently, the influence laws of different slurry on the polishing effect of TC4 were explored by electrochemical tests. Finally, based on XPS and infrared test characterisation, the CMP mechanism of TC4 was revealed as follows: hydrogen peroxide oxidises the Ti element into high-valent oxides, the −N–H and −O–H groups in 2-ANA combine with metal ions in solution to form complexes, and this chemical process reaches a dynamic equilibrium with the mechanical action of abrasive grains to ultimately achieve the ultra-smooth polishing of TC4.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"28 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857916","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 flexible solid-state supercapacitors based on binder-free V2CTx/Ni3S2 nanocomposites on carbon cloth
IF 6.7 2区 材料科学
Applied Surface Science Pub Date : 2024-12-19 DOI: 10.1016/j.apsusc.2024.162136
Fei Hu, Jinhe Wei, Chenglong Lv, Limin Bian, Xinyu Quan, Qiuyun Ouyang
{"title":"High-performance flexible solid-state supercapacitors based on binder-free V2CTx/Ni3S2 nanocomposites on carbon cloth","authors":"Fei Hu, Jinhe Wei, Chenglong Lv, Limin Bian, Xinyu Quan, Qiuyun Ouyang","doi":"10.1016/j.apsusc.2024.162136","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162136","url":null,"abstract":"Designing excellent binder-free composite materials with high performance flexible is an important research direction for energy storage devices. The high theoretical capacity of two-dimensional V<sub>2</sub>CT<sub>x</sub> MXene is ideal for electrode materials. However, the interlayer spacing and self-aggregation affect the practical application of the V<sub>2</sub>CT<sub>x</sub>. The reduced available surface area and hindered diffusion of electrolytes limit the application development. Designing and constructing self-supporting layered structural composite materials to increase ion transport paths and show excellent structural stability. Herein, the Ni<sub>3</sub>S<sub>2</sub> nanoblock arrays were orderly arranged on the V<sub>2</sub>CT<sub>x</sub> supported by carbon cloth. The V<sub>2</sub>CT<sub>x</sub> nanosheets are coated on carbon cloth without binder. Thus, the synthesized hierarchical structure significantly increased the surface area with electrolyte penetration and ion transport. Additionally, the interlayer Ni<sub>3</sub>S<sub>2</sub> nanoblock arrays prevent the collapse of the V<sub>2</sub>CT<sub>x</sub> interlayers. The designed flexible solid-state hybrid supercapacitor delivers an energy density of 55.69 Wh·kg<sup>−1</sup> at a power density of 413.82 W·kg<sup>−1</sup> and maintains 91.08 % cycling stability over 10,000 cycles. The strategy results indicate that the constructed composites provide a pathway for binder-free high performance energy storage devices.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"10 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142857542","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
Modulating the radical scavenging/generation ability of light-responsive melanin-like nanoplatforms by ascorbic acid treatment
IF 6.7 2区 材料科学
Applied Surface Science Pub Date : 2024-12-18 DOI: 10.1016/j.apsusc.2024.162134
Giulio Pota, Antonia Puzone, Emanuele Carrella, Alessandro Pezzella, Giuseppina Luciani, Gerardino D’Errico, Giuseppe Vitiello
{"title":"Modulating the radical scavenging/generation ability of light-responsive melanin-like nanoplatforms by ascorbic acid treatment","authors":"Giulio Pota, Antonia Puzone, Emanuele Carrella, Alessandro Pezzella, Giuseppina Luciani, Gerardino D’Errico, Giuseppe Vitiello","doi":"10.1016/j.apsusc.2024.162134","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162134","url":null,"abstract":"Redox-active nanomaterials represent powerful tools for therapeutics due to either antioxidant or pro-oxidant behavior that is essential in regulating the reactive oxygen species (ROS) levels in the biological systems. A promising way to design and realize bioinspired versatile redox-active nanoplatforms is offered by melanin polymers, which are widely available hydrophobic pigments made of poly(hydroxy indole) planar structures produced by oxidative polymerization of the monomeric precursors. Melanins can radically change the redox activity as a response to external stimuli such as acidification or light irradiation, thus exhibiting ROS-generating ability. Herein, the design of versatile light-triggered redox-active melanin-based nanoplatforms is proposed through a green photocatalytic/solvothermal approach. Extensive physicochemical characterization and radical scavenging assays are conducted to define the main properties of such nanomaterials. They exert a significant paramagnetic behavior together with a strong radical scavenging activity benefitting from post-reduction with ascorbic acid, due to increase in the colloidal stability at high concentrations. ROS generation by 2D melanin-based biointerfaces obtained by depositing thin layers on glass slides is activated by IR and UV light irradiation but quenched after redox exchange with ascorbic acid. This study contributes to the future development of sustainable light-responsive bioelectronic devices.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"8 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848933","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
Emerging two-dimensional superconductors TiB3C and Ti2B3C2 with monolayer kagome borophene
IF 6.7 2区 材料科学
Applied Surface Science Pub Date : 2024-12-18 DOI: 10.1016/j.apsusc.2024.162140
Honggang Li, Fanjunjie Han, Jiahui Wei, Ting Zhong, Jiance Sun, Yiming Zhang, Meiling Xu, Yinwei Li, Shoutao Zhang
{"title":"Emerging two-dimensional superconductors TiB3C and Ti2B3C2 with monolayer kagome borophene","authors":"Honggang Li, Fanjunjie Han, Jiahui Wei, Ting Zhong, Jiance Sun, Yiming Zhang, Meiling Xu, Yinwei Li, Shoutao Zhang","doi":"10.1016/j.apsusc.2024.162140","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162140","url":null,"abstract":"Probing emerging two-dimensional (2D) superconductors, including 2D metal borocarbides, has recently garnered significant research interest. However, 2D superconducting Ti-B-C monolayers with unique boron motifs have yet to be discovered. In this study, we conducted a comprehensive investigation of the 2D Ti-B-C system through a first-principles structure search method and identified two stable metallic monolayers, TiB<sub>3</sub>C and Ti<sub>2</sub>B<sub>3</sub>C<sub>2</sub>, featuring unanticipated kagome boron layers. Electron–phonon coupling (EPC) simulations reveal that both monolayers exhibit phonon-mediated superconductivity, with superconducting transition temperatures (<em>T<sub>c</sub></em>) of 3.2 and 6.5 K, respectively. Furthermore, biaxial compressive strain enhances superconductivity in TiB<sub>3</sub>C, increasing its <em>T<sub>c</sub></em> to 11.3 K under −2 % strain, while biaxial tensile train elevates the <em>T<sub>c</sub></em> of Ti<sub>2</sub>B<sub>3</sub>C<sub>2</sub> to 15.5 K under 7 % strain. This improvement in superconductivity is primarily attributed to the increase in EPC strength. Additionally, we designed a novel TiB<sub>3</sub>CH<sub>2</sub> monolayer with metallic characteristics using a hydrogenation strategy. This monolayer exhibits a significantly higher <em>T<sub>c</sub></em> of 18.7 K, chiefly due to strong coupling between Ti 3<em>d</em> electron states near the Fermi level and mid-frequency B-, C-, and H-associated phonons. Our findings provide valuable insights into 2D boron–carbon-based superconductors containing metals and pave the way for designing new 2D superconducting materials.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"75 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142849055","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
Deposition of BiVO4 on the floating lightweight hollow sponge carbon nitride for efficient photocatalytic degradation of tetracycline by S-scheme heterojunction and the ecotoxicity assessment of the products
IF 6.7 2区 材料科学
Applied Surface Science Pub Date : 2024-12-18 DOI: 10.1016/j.apsusc.2024.162133
Bo Zhang, Xu Wang, Chunlan Xu, Deping Huang, Yongsheng Chang, Delu Cao, Xueying Wang, Changyu Lu, Jianwei Zhao, Wei Huang
{"title":"Deposition of BiVO4 on the floating lightweight hollow sponge carbon nitride for efficient photocatalytic degradation of tetracycline by S-scheme heterojunction and the ecotoxicity assessment of the products","authors":"Bo Zhang, Xu Wang, Chunlan Xu, Deping Huang, Yongsheng Chang, Delu Cao, Xueying Wang, Changyu Lu, Jianwei Zhao, Wei Huang","doi":"10.1016/j.apsusc.2024.162133","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162133","url":null,"abstract":"In this study, the floating lightweight hollow sponge carbon nitride containing BiVO<sub>4</sub> (BVO/LHSCN) was constructed using calcination and hydrothermal methods. Experiments and DFT theoretical calculations show that the S-scheme charge transfer path of BVO/LHSCN and its unique porous network floating structure achieve BVO/LHSCN excellent light capture ability, photogenerated carrier separation efficiency and recycling performance. After 180 min of illumination, BVO/LHSCN can degrade 94.9 % of tetracycline (TC), with a rate constant as high as 0.06235 min<sup>−1</sup>, which was 4.35 times and 7.7 times higher than that of pure BVO (0.01433 min<sup>−1</sup>) and LHSCN (0.00807 min<sup>−1</sup>), respectively. After 5 cycles of experiment, BVO/LHSCN still exhibited excellent TC degradation performance, demonstrating outstanding stability. Subsequently, the site of TC attack was predicted by Fukui index, the intermediate product and degradation pathway during the TC degradation were analyzed by LC-MS. The possible ecological risks of the intermediate and final products were assessed, determining a low environmental risk in the degradation process of tetracycline. This study provides a novel method to improve the light-capturing ability of S-scheme heterojunction photocatalysts.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"53 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840807","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 reconstruction of copper(Ⅰ) sulfide electrode regulated electroreduction CO2 selectivity
IF 6.7 2区 材料科学
Applied Surface Science Pub Date : 2024-12-18 DOI: 10.1016/j.apsusc.2024.162139
Qin Ding, Jianhua Lin, Xiaoyu Li, Yu Dong, Yongchun Bao, Huazhong Liang, Quan Zhuang, Jinghai Liu, Yin Wang
{"title":"Surface reconstruction of copper(Ⅰ) sulfide electrode regulated electroreduction CO2 selectivity","authors":"Qin Ding, Jianhua Lin, Xiaoyu Li, Yu Dong, Yongchun Bao, Huazhong Liang, Quan Zhuang, Jinghai Liu, Yin Wang","doi":"10.1016/j.apsusc.2024.162139","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162139","url":null,"abstract":"Carbon dioxide (CO<sub>2</sub>) electroreduction to valuable chemicals is a promising approach for efficient carbon utilization. Herein, we propose an in situ electrochemical reconstruction method to regulate the selectivity of electroreduction of CO<sub>2</sub> into CO or HCOOH using a copper sulfide-loaded copper foam (Cu<sub>2</sub>S/CF) self-supporting electrode. Cu<sub>2</sub>S/CF under the applied potential of −0.2 V versus reversible hydrogen electrode (vs. RHE) maintain as the intial one, and Cu<sup>+</sup> are partially reduced to Cu<sup>0</sup> under the applied potential of −0.4 V vs. RHE forming vacancy S defects (V<sub>S</sub>) in Cu<sub>2</sub>S. Notably, the Cu<sub>2</sub>S/CF achieve a potential regulable electroreduction CO<sub>2</sub> into CO with faradaic efficiency (FE) of 84.6 % at the applied potential of −0.2 V vs. reversible hydrogen electrode (RHE) and HCOOH with FE of 81.6 % at −0.4 V vs. RHE. Density functional theory (DFT) calculations reveal the different CO<sub>2</sub> adsorption configurations of catalytic centers resulting in the difference on the reduction products. Saturation Cu site on Cu<sub>2</sub>S surface favours to adsorb CO<sub>2</sub> with end-on configuration of *COOH for CO production, and unsaturation Cu site on Cu<sub>2</sub>S-V<sub>S</sub> surface prefers to the bridge configuration of *O*COH for HCOOH synthesis.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"22 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848938","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
Hollow and solid combined double-shell nitrogen-doped carbon-Fe3C-Fe nanospheres with tunable shell thickness and magnetic component for enhanced electromagnetic wave absorption
IF 6.7 2区 材料科学
Applied Surface Science Pub Date : 2024-12-18 DOI: 10.1016/j.apsusc.2024.162143
Xinyu Wang, Zhuo Cai, Yifei Wang, Yifei Ma, Zhaomin Tong, Mei Wang, Jonghwan Suhr, Liantuan Xiao, Suotang Jia, Xuyuan Chen
{"title":"Hollow and solid combined double-shell nitrogen-doped carbon-Fe3C-Fe nanospheres with tunable shell thickness and magnetic component for enhanced electromagnetic wave absorption","authors":"Xinyu Wang, Zhuo Cai, Yifei Wang, Yifei Ma, Zhaomin Tong, Mei Wang, Jonghwan Suhr, Liantuan Xiao, Suotang Jia, Xuyuan Chen","doi":"10.1016/j.apsusc.2024.162143","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162143","url":null,"abstract":"Previous research has fully demonstrated that the core–shell spherical structure can facilitate multiple reflection within the cavity and provide polarization relaxation at the heterogeneous interfaces. In this study, double-shell nitrogen-doped carbon-Fe<sub>3</sub>C-Fe (NC-Fe<sub>3</sub>C-Fe, referred to as CFF) nanospheres composed of hollow NC-Fe<sub>3</sub>C and solid NC-Fe<sub>3</sub>C/Fe nanospheres are synthesized in an interconnected three-dimensional structure. The double-shell is composed of nitrogen-doped carbon outer shells and Fe<sub>3</sub>C inner shells, derived from the carbonization of polydopamine (PDA) and controllable etching of the Fe nanotemplates in the PDA@Fe. In this strategy, the carbon shells provide dielectric loss, and the Fe<sub>3</sub>C and Fe contribute to magnetic loss, bringing about a magnetic-electric synergistic effect on effective electromagnetic wave absorption (EMA). By adjusting the thickness of the carbon shells and the etching time of the Fe, the CFF achieves a minimum reflection loss of − 74.00 dB at a thickness of 1.91 mm, with an effective absorption bandwidth of 5.04 GHz. In addition, by the radar cross-section (RCS) scattering simulation, the RCS value at a scattering angle of 0° decreased by 32.06 dBm<sup>2</sup>, confirming an excellent EMA capability in practical far-field applications. This study provides an effective strategy for the application of core–shell and double-shell structures in the EMA materials.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"11 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848976","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
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