Materials Chemistry and Physics最新文献_第6页

Synergistic engineering of prelithiation and carbon coating for silicon microsphere anodes in advanced Li-ion batteries 先进锂离子电池硅微球阳极预锂化与碳包覆协同工程

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2026-04-15 Epub Date: 2026-01-31 DOI: 10.1016/j.matchemphys.2026.132163

Pedda Masthanaiah Ette , Sajjad Mohsenpour , Xavier Michaud , Allen Sandwell , Seonghwan Kim , Simon Park , Chaneel Park

Despite notable progress in understanding interfacial mechanisms and the alloying–dealloying behavior of nanostructured silicon anodes, significant challenges remain in meeting the performance standards necessary for commercialization. Specifically, these include charge-induced large volume changes, redundant side reactions with the electrolyte, and poor initial coulombic efficiency. Herein, we report a method of pre-lithiation of silicon microspheres followed by conformal carbon coating (PL-Si/C). The resulting products exhibited an enhanced ICE of 84.2% and a stable reversible capacity of ∼1600 mA h/g at a 0.5C rate, with 83% retention, compared to spray-dried silicon microspheres (Si-MS), which showed 77.6% ICE and 81% retention. When integrated with graphite, PL-Si/C shows 90% ICE and 79.5% retention after 200 cycles at 1C rate, while Si-MS shows 62.5% capacity retention. The cycling stability of materials can be credited to the unique microsphere morphology in which Si nanodomains are embedded in carbon nanotube interwoven amorphous lithium silicate (Li_xSiO_y) matrix, followed by conformal carbon coating using the chemical vapor deposition technique. The primary layer acts as a buffering medium during volume expansion, suppresses initial lithium loss, and enhances ICE. Further carbon coating supports the mechanical integrity. Further to realize the practical applicability of the material, full cells were tested with lithium and LiNCA cathodes.

尽管在理解纳米结构硅阳极的界面机制和合金化-脱合金行为方面取得了显著进展，但在满足商业化所需的性能标准方面仍存在重大挑战。具体来说，这些包括电荷引起的大体积变化，与电解质的多余副反应，以及较差的初始库仑效率。本文报道了一种硅微球预锂化后保形碳涂层（PL-Si/C）的方法。与喷雾干燥的硅微球（Si-MS）相比，所得产品的ICE增强了84.2%，在0.5C的速率下具有稳定的可逆容量为~ 1600 mA h/g，保留率为83%，而喷雾干燥的硅微球（Si-MS）的ICE为77.6%，保留率为81%。当与石墨结合时，在1C倍率下循环200次后，PL-Si/C的容量保留率为90%，保留率为79.5%，而Si-MS的容量保留率为62.5%。材料的循环稳定性可以归功于独特的微球形态，其中Si纳米畴嵌入碳纳米管交织的无定形硅酸锂（LixSiOy）基体中，然后使用化学气相沉积技术进行保形碳涂层。初级层在体积膨胀过程中起到缓冲介质的作用，抑制初始锂的损失，并增强ICE。进一步的碳涂层支持机械完整性。为了进一步实现材料的实际适用性，用锂和LiNCA阴极对满电池进行了测试。

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引用次数: 0

Antibacterial characteristics and accelerated degradation of ZnCu-filled poly(L-lactide) scaffold 锌填充聚l -丙交酯支架的抗菌特性及加速降解

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2026-04-15 Epub Date: 2026-02-05 DOI: 10.1016/j.matchemphys.2026.132182

Long Liu , Jiamin Li , Yichao Wu , Jian Liu , Wenjun Fang , Shu Wen , Zongming Zhu

Poly-l-lactide (PLLA) is a promising bone implant material because of its favorable biocompatibility, biodegradability and outstanding processability. Nevertheless, it lacks antibacterial activity, which greatly limits its clinical application. In this study, degradable ZnCu particles were incorporated into PLLA scaffolds to endow them with antibacterial function via selective laser sintering. The mechanism was that copper ions and zinc ions released from the PLLA-ZnCu scaffold could kill bacteria by damaging cell membrane integrity, inactivating enzymes and restraining deoxyribonucleic acid replication. The relative bacterial viability of Escherichia coli and Staphylococcus aureus incubated with the PLLA-8ZnCu scaffold for 48 h was only 6.4 ± 1.7% and 9.4 ± 2.7%, respectively. Meanwhile, the weight loss percentage of the PLLA-16ZnCu scaffold (6.47 ± 0.2%) was approximately three times greater than that of the PLLA scaffold (1.89 ± 0.17%). The larger weight loss was mainly attributed to the acid-alkali neutralization reaction occurring between the alkaline degradation product of the ZnCu particles and the acidic degradation product of the PLLA matrix, which could simultaneously promote the degradation of both ZnCu particles and the PLLA matrix, ultimately accelerating scaffold degradation. Besides, the compressive strength and elastic modulus of the PLLA-ZnCu scaffolds were also enhanced owing to the dispersion strengthening effect of ZnCu particles. In addition, the PLLA-ZnCu scaffolds exhibited excellent cell viability and adhesion. These results suggest that the PLLA-ZnCu scaffold may be a potential candidate material for orthopedic implants.

聚l-丙交酯（PLLA）具有良好的生物相容性、生物可降解性和良好的加工性能，是一种很有前途的骨种植材料。然而，它缺乏抗菌活性，这极大地限制了其临床应用。本研究通过选择性激光烧结将可降解的ZnCu颗粒掺入PLLA支架中，赋予其抗菌功能。其机制是pla - zncu支架释放的铜离子和锌离子通过破坏细胞膜完整性、灭活酶和抑制脱氧核糖核酸复制等方式杀死细菌。pla - 8zncu支架培养48 h后，大肠杆菌和金黄色葡萄球菌的相对细菌活力分别仅为6.4±1.7%和9.4±2.7%。同时，PLLA- 16zncu支架的失重率（6.47±0.2%）约为PLLA支架（1.89±0.17%）的3倍。重量损失较大主要是由于ZnCu颗粒的碱性降解产物与PLLA基质的酸性降解产物发生酸碱中和反应，同时促进ZnCu颗粒和PLLA基质的降解，最终加速支架降解。此外，由于ZnCu颗粒的分散强化作用，pla -ZnCu支架的抗压强度和弹性模量也得到了提高。此外，pla - zncu支架具有良好的细胞活力和粘附性。这些结果表明pla - zncu支架可能是骨科植入物的潜在候选材料。

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引用次数: 0

Upcycling waste paper into carbon dot; AgI composites for efficient pesticide degradation 将废纸升级为碳点；高效降解农药的AgI复合材料

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2026-04-15 Epub Date: 2026-02-08 DOI: 10.1016/j.matchemphys.2026.132205

Bosely Anne Bose , Abhijit Saha , Ange Nzihou , Nandakumar Kalarikkal

Organic pesticides are persistent pollutants that accumulate in the environment, posing serious risks to ecosystems and human health, particularly through contamination of water resources. Photocatalytic degradation offers a sustainable and efficient approach for eliminating these pesticides, providing a green solution for environmental remediation. In this study, we report a sustainable, eco-friendly approach to synthesizing carbon dots (CDs) from waste paper and incorporating them into silver iodide (AgI) to form highly efficient visible-light photocatalyst composites. The CDs, derived from waste paper, offer advantages of low cost, low toxicity, and excellent water solubility. The integration of CDs into AgI significantly enhances charge transfer and suppresses electron–hole recombination. The resulting AgI–CD composites exhibited superior photocatalytic activity (97% in 150 min) for the degradation of the pesticide Thiram, with the composite containing 10 wt% CD achieving the highest performance. This study not only provides a green recycling route for waste paper but also demonstrates the potential of AgI–CD composites for effective environmental remediation.

有机农药是在环境中积累的持久性污染物，特别是通过污染水资源，对生态系统和人类健康构成严重风险。光催化降解为消除这些农药提供了可持续、高效的途径，为环境修复提供了绿色解决方案。在这项研究中，我们报告了一种可持续、环保的方法，从废纸中合成碳点（cd），并将其与碘化银（AgI）结合，形成高效的可见光光催化剂复合材料。从废纸中提取的cd具有成本低、毒性低、水溶性好等优点。将CDs集成到AgI中显著增强了电荷转移，抑制了电子-空穴复合。所得的AgI-CD复合材料在降解杀虫剂Thiram方面表现出优异的光催化活性（在150 min内达到97%），其中含有10 wt% CD的复合材料达到最高性能。本研究不仅为废纸的绿色回收提供了一条途径，也展示了AgI-CD复合材料在环境修复中的潜力。

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引用次数: 0

Fabrication of homemade screen-printed nickel nanoparticles/boron-doped diamond electrode for electrochemical degradation of methyl orange 自制网印纳米镍/掺硼金刚石电极电化学降解甲基橙的制备

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2026-04-15 Epub Date: 2026-01-29 DOI: 10.1016/j.matchemphys.2026.132145

Syasya Nadia Rahmah , Mai Tomisaki , Ilma Amalina , Mirza Ardella Saputra , Prastika Krisma Jiwanti

Water pollution caused by synthetic dyes, particularly Methyl Orange (MO), poses significant environmental challenges. MO can be toxic to aquatic life, affecting ecosystems when released into water bodies. Exposure to long and high concentrations may pose health risks to humans, including potential carcinogenic effects. Due to this risk, degradation of MO in environment is emerging. This study explores the electrochemical degradation of MO using boron-doped diamond nanoparticles (BDD NP) modified with nickel nanoparticles (NiNP). NiNP were synthesized via chemical reduction and integrated with BDD NP at different ratios (1:2, 1:3, and 1:5). The composite was then screen-printed onto the polyimide film. Electrochemical degradation experiments revealed that the NiNP/BDD B (1:3) electrode exhibited the highest efficiency, being twice more efficient compared to the BDD printed electrode at potential of +3 V (vs. Ag/AgCl). The enhanced performance is attributed to increased electroactive surface area and optimized hydroxyl radical formation. These findings highlight the potential of NiNP-modified BDD electrodes for effective wastewater treatment.

以甲基橙（MO）为代表的合成染料对水体造成了严重的污染。MO对水生生物有毒，释放到水体中会影响生态系统。长期和高浓度接触可能对人类健康构成风险，包括潜在的致癌作用。由于这种风险，MO在环境中的降解正在出现。本研究利用镍纳米粒子（NiNP）修饰的掺硼金刚石纳米粒子（BDD NP）进行MO的电化学降解研究。通过化学还原合成NiNP，并与BDD NP按不同比例（1:2、1:3和1:5）进行整合。然后将复合材料丝网印刷到聚酰亚胺薄膜上。电化学降解实验表明，在+3 V （vs. Ag/AgCl）电位下，NiNP/BDD B（1:3）电极的效率最高，是BDD印刷电极的两倍。性能的增强是由于电活性表面积的增加和羟基自由基形成的优化。这些发现突出了ninp修饰的BDD电极在有效处理废水方面的潜力。

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引用次数: 0

Enhancing mechanical properties of WC-5Ni hardmetals via microwave sintering: Role of Mo, Si, Ti, and V additives in microstructure evolution and performance optimization 微波烧结增强WC-5Ni硬质合金的力学性能：Mo、Si、Ti和V添加剂在显微组织演变和性能优化中的作用

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2026-04-15 Epub Date: 2026-01-30 DOI: 10.1016/j.matchemphys.2026.132130

Ehsan Ghasali , Saleem Raza , Andrii Babenko , Li Jie , Touradj Ebadzadeh , Yasin Orooji

In this research, four metallic additives (Mo, Si, Ti, and V) were incorporated into WC-5 wt%Ni hardmetals prepared via a rapid microwave sintering process. Five wt% of each additive was individually mixed with WC and Ni powders using a high-energy mixer mill to ensure a uniform distribution of the starting materials. After achieving homogeneity, bar-shaped green bodies were formed under a uniaxial pressure of 240 MPa. Microwave sintering was conducted at 1400, 1500, and 1600 °C without any holding time. XRD analysis revealed that WC was the dominant crystalline phase, while each system also exhibited reaction products such as carbides and intermetallic phases derived from the additives. SEM images of the polished sample surfaces showed a fine microstructure across all samples. Moreover, increasing the sintering temperature from 1400 to 1600 °C led to improved densification, as confirmed by calculated densities and mechanical property evaluations. The highest bending strength (876 ± 25 MPa), Vickers hardness (1728 ± 37 Hv) and Palmqvist fracture toughness (W_K) (8.6 ± 0.2 MN m^−3/2) were observed in the sample sintered at 1600 °C with the Ti additive, likely due to the formation of NiTi intermetallics and titanium carbide. In contrast, the sample sintered at 1400 °C with the Mo additive exhibited the lowest mechanical properties, probably because the formation of a Ni₃Mo₃C complex phase consumed the Ni binder.

在本研究中，四种金属添加剂（Mo, Si， Ti和V）加入到通过快速微波烧结工艺制备的WC-5 wt%Ni硬质合金中。每种添加剂的5 wt%分别与WC和Ni粉末混合，使用高能混合机，以确保起始物料的均匀分布。均匀化后，在单轴压力240 MPa下形成条形绿体。在1400、1500和1600℃下进行微波烧结，不需要保温时间。XRD分析表明，WC为主要晶相，同时各体系中还存在由添加剂产生的碳化物和金属间相等反应产物。抛光样品表面的SEM图像显示所有样品的微观结构都很好。此外，将烧结温度从1400℃提高到1600℃，密度计算和力学性能评估证实了致密性的改善。在1600℃下，Ti添加剂烧结后的试样具有最高的抗弯强度（876±25 MPa）、维氏硬度（1728±37 Hv）和Palmqvist断裂韧性（WK）（8.6±0.2 MN m−3/2），这可能是由于NiTi金属间化合物和碳化钛的形成。相比之下，在1400℃下烧结的样品表现出最低的力学性能，这可能是因为Ni3Mo3C配合物的形成消耗了Ni粘结剂。

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引用次数: 0

Multi-parameter ultrasonic surface rolling for synergistic enhancement of wear and electrochemical corrosion performance in 20CrMoH steel 多参数超声表面轧制协同提高20CrMoH钢的磨损和电化学腐蚀性能

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2026-04-15 Epub Date: 2026-02-01 DOI: 10.1016/j.matchemphys.2026.132169

Yanrui Wang , Shubo Xu , Tianhua Li , Ying Zhao , Chen Xu , Weihai Zhang , Wenming Wang , Lindong Wang

The modification of materials via the Ultrasonic Surface Rolling Process (USRP) serves as a pivotal approach for enhancing surface integrity, wear resistance, and electrochemical corrosion performance. Investigations into the impact of USRP on surface integrity encompass analyses from the perspectives of surface roughness, microhardness, and surface residual stress, elucidating the underlying mechanisms through which key process parameters—such as rolling passes, vibration amplitude, and rolling force—affect the material's surface state. Furthermore, the influence of optimized process parameters on surface morphology and microstructure, along with the corresponding performance outcomes, has been systematically characterized.The results indicated that the USRP-treated specimen exhibited a reduction in surface roughness by approximately 80% and an increase in surface microhardness to over 300 HV_0.5, accompanied by the formation of a more pronounced residual compressive stress layer on the surface. Microstructural analysis revealed that USRP led to significant grain refinement in the near-surface region, with the average grain size decreasing from 42 μm to 22 μm. This refinement was accompanied by a high density of dislocations and the formation of lath martensite. The synergistic effects of grain refinement, work hardening, and residual compressive stress contributed to a reduction in wear rate by approximately 90%, as well as a significant decrease in corrosion current density, indicating a notable improvement in electrochemical corrosion performance. Further investigations demonstrated that achieving optimal surface integrity and mechanical performance requires appropriate process parameters, as excessive rolling could induce surface damage and performance degradation.

通过超声表面轧制工艺（USRP）对材料进行改性是提高表面完整性、耐磨性和电化学腐蚀性能的关键方法。研究USRP对表面完整性的影响，包括从表面粗糙度、显微硬度和表面残余应力的角度进行分析，阐明关键工艺参数（如轧制道次、振动幅度和轧制力）影响材料表面状态的潜在机制。此外，优化的工艺参数对表面形貌和微观结构的影响，以及相应的性能结果，已经被系统地表征。结果表明，usrp处理后的试样表面粗糙度降低了约80%，表面显微硬度增加到300 HV0.5以上，同时在表面形成了更明显的残余压应力层。显微组织分析表明，USRP使近表面区域晶粒细化，平均晶粒尺寸从42 μm减小到22 μm。这种细化伴随着高密度的位错和板条马氏体的形成。晶粒细化、加工硬化和残余压应力的协同作用使磨损率降低了约90%，腐蚀电流密度也显著降低，这表明电化学腐蚀性能得到了显著改善。进一步的研究表明，为了获得最佳的表面完整性和机械性能，需要适当的工艺参数，因为过度轧制会导致表面损伤和性能下降。

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引用次数: 0

Cobalt(II) tetra-aminophthalocyanine conjugated folic acid by the Ugi reaction: An efficient heterogeneous biocatalyst for cycloaddition of carbon dioxide to epoxide Ugi反应中钴（II）四氨基酞菁偶联叶酸：二氧化碳环加成成环氧化物的高效非均相生物催化剂

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2026-04-15 Epub Date: 2026-02-02 DOI: 10.1016/j.matchemphys.2026.132127

Parisa Momeni Dehaghi , Tahereh Nasiriani , Mohammad Taghi Nazeri, Ahmad Shaabani

The functionalization of materials through multicomponent reactions (MCRs) has sparked significant interest among researchers due to the development of materials with exceptional properties. Herein, a novel bio-based catalytic system was synthesized via the conjugation of cobalt (II) tetra-aminophthalocyanine (Co-TAPc) and folic acid (FA) (UFA@Co-TAPc) through the Ugi four-component reaction (Ugi-4CR). For this aim, the amine functional groups of the Co-TAPc, benzaldehyde, FA, and cyclohexyl isocyanide participated in the Ugi-4CR to prepare UFA@Co-TAPc as a biocatalyst. The catalytic activity of the synthesized biocatalyst was explored in generating cyclic carbonate derivatives via the chemical fixation of carbon dioxide (CO₂) with epoxides in the presence of tetrabutylammonium bromide (TBAB) as a co-catalyst. The structures of tetra-aminophthalocyanine (TAPc) and FA are rich in nitrogen, and the amide bonds formed via the Ugi reaction have a synergistic effect in CO₂ absorption. Fascinatingly, catalytic experiments demonstrated that the synthesized biocatalyst was highly efficient regarding the chemical fixation of CO₂ (yield 90–98 %), completing it under mild reaction conditions (solvent free, P_CO2 = 1 bar, 2 h, 80 °C). The advantages of this biocatalytic system include its low cost, short reaction time, and environmental friendliness. Moreover, UFA@Co-TAPc, as heterogeneous biocatalyst, is easy to recycle and reuse, show low metal leaching, and reuse over five runs with only a slight reduction in catalytic activity.

由于具有特殊性能的材料的发展，通过多组分反应（mcr）实现材料的功能化引起了研究人员的极大兴趣。本文通过Ugi四组分反应（Ugi- 4cr），将钴（II）四氨基酞菁（Co-TAPc）与叶酸（FA）（UFA@Co-TAPc）偶联合成了一种新型生物基催化体系。为此，将Co-TAPc、苯甲醛、FA和环己基异氰化物的胺官能团参与Ugi-4CR制备UFA@Co-TAPc作为生物催化剂。研究了合成的生物催化剂在四丁基溴化铵（TBAB）助催化剂的作用下，通过二氧化碳（CO2）与环氧化物的化学固定生成环碳酸盐衍生物的催化活性。四氨基酞菁（TAPc）和FA的结构富含氮，通过Ugi反应形成的酰胺键对CO2吸收具有协同作用。有趣的是，催化实验表明，合成的生物催化剂在温和的反应条件下（无溶剂，PCO2 = 1 bar, 2 h, 80°C），对CO2的化学固定效率很高（收率为90 - 98%）。该生物催化体系具有成本低、反应时间短、环境友好等优点。此外，UFA@Co-TAPc作为多相生物催化剂，易于回收再利用，金属浸出率低，重复使用5次，催化活性略有下降。

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引用次数: 0

Pre-oxidation-induced MnCr2O4/Cr2O3 scales in HP steels and their role in carburization resistance 高温钢中预氧化诱导的MnCr2O4/Cr2O3结垢及其在抗渗碳中的作用

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2026-04-15 Epub Date: 2026-01-29 DOI: 10.1016/j.matchemphys.2026.132141

Siriwan Ouampan , Tanaporn Rojhirunsakool

Coking and carburization are critical degradation mechanisms in HP steels used in ethylene cracking furnaces, severely limiting service life and efficiency. This study investigates pre-oxidation at 850 °C and 1100 °C for 1–6 h in air to promote the in-situ formation of protective MnCr₂O₄/Cr₂O₃/SiO₂ oxide scales on centrifugally cast HP steel. At 1100 °C, dense multi-layered scales (∼12 μm) comprising an outer MnCr₂O₄ spinel, an intermediate Cr₂O₃ layer, and a SiO₂-rich interfacial layer were obtained, whereas treatment at 850 °C produced thinner, partially spalled films. XRD and EDS confirmed a marked reduction in surface carbides and carbon concentration (from 11.91 at. % in the as-received alloy to 3.64 at.% after 1100 °C/6 h), indicating effective decarburization. Carburization testing under LPG/N₂ at 850 °C for 24 h showed that the as-received and 850 °C/6 h samples developed filamentous coke (3.11 μm and 6.53 μm, respectively), while the 1100 °C/6 h sample completely suppressed filamentous coke and formed only granular deposits with reduced thickness (1.67 μm), corresponding to >46 % reduction in coke accumulation. Although localized softening occurred in the decarburized zone (140 Hv0.2), the overall mechanical integrity of the alloy remained sufficient for service. These results demonstrate that pre-oxidation at 1100 °C/6 h produces a stable MnCr₂O₄/Cr₂O₃/SiO₂ protective layer, significantly improving resistance to carburization and coking, while offering a simple and cost-effective alternative to conventional coating approaches.

焦化和渗碳是乙烯裂解炉中HP钢的关键降解机制，严重限制了其使用寿命和效率。研究了离心铸造HP钢在850℃和1100℃空气中预氧化1-6 h，促进MnCr2O4/Cr2O3/SiO2氧化皮的原位形成。在1100°C时，得到了致密的多层鳞片（~ 12 μm），包括外层的MnCr2O4尖晶石、中间的Cr2O3层和富含sio2的界面层，而在850°C时，得到的薄膜更薄，部分剥落。XRD和EDS证实，表面碳化物和碳浓度（从11.91 at）显著降低。%在接收合金中至3.64 at。%（1100℃/6 h后），表明脱碳有效。在850°C/ N2条件下渗碳24 h的结果表明，接收样品和850°C/6 h的样品形成了丝状焦（分别为3.11 μm和6.53 μm），而1100°C/6 h的样品完全抑制了丝状焦的形成，只形成了厚度减小（1.67 μm）的颗粒状沉积，相当于减少了46%的积炭。尽管脱碳区（140 Hv0.2）发生了局部软化，但合金的整体机械完整性仍然足以使用。这些结果表明，在1100℃/6 h下预氧化可以产生稳定的MnCr2O4/Cr2O3/SiO2保护层，显著提高了MnCr2O4/Cr2O3/SiO2保护层的抗渗碳和抗结焦性能，同时为传统的涂层方法提供了一种简单而经济的替代方法。

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引用次数: 0

Cobalt-modified CuO nanoparticles as functional interfaces in MAPbI3 perovskite photodiode 钴修饰的CuO纳米颗粒作为MAPbI3钙钛矿光电二极管的功能界面

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2026-04-15 Epub Date: 2026-02-06 DOI: 10.1016/j.matchemphys.2026.132195

Megha Rana , Riya Malik , Ankur Rana , Suraj P. Khanna , R. Srivastava , C.K. Suman

Solution processed nanoparticles offer a unique advantage in MAPbI₃ photodetector interfaces by facilitating efficient charge transport. Cobalt-doped copper oxide (Cu_1-xCo_xO, x = 0, 0.02, 0.05, and 0.08) nanoparticles were synthesized by sol-gel method to get homogeneously distributed nanoparticles. X-ray diffraction (XRD) analysis confirmed that all samples retained a monoclinic crystal phase across the doping range. Field-emission scanning electron microscopy (FESEM) revealed a progressive decrease in grain size with increasing cobalt content, while dynamic light scattering (DLS) provided detailed particle size distribution profiles. Optical studies confirm that the nanomaterial exhibits excellent absorption in the visible wavelength range of 300–800nm, and Tauc's analysis reveals that the cobalt doping effectively tunes the optical bandgap of CuO nanoparticles. The synthesized Cu_1-xCo_xO nanomaterials are used as the functional interface in the device configuration of FTO|Cu_1-xCo_xO|MAPbI₃|CuPc|BCP|Al. The Co doping of CuO nanoparticle improves the device performance by appropriate energy band alignment and charge conduction in the interface layer. The 8% Co doped CuO interface layer shows the highest value of current on-off ratio ∼32.58, responsivity ∼44 mA/W and detectivity ∼2.6 × 10⁸ Jones under 520 nm illumination at an intensity of 5 mWcm⁻². Our findings pave the way for considering cobalt-doped CuO nanoparticles as promising candidates for functional interface layers in perovskite-based devices, owing to their tunable optical properties, enhanced charge transport, and compatibility with solution-processed architectures.

溶液处理的纳米颗粒通过促进有效的电荷传输，在MAPbI3光电探测器界面中提供了独特的优势。采用溶胶-凝胶法制备了钴掺杂氧化铜（Cu1-xCoxO, x = 0、0.02、0.05和0.08）纳米颗粒，得到了分布均匀的纳米颗粒。x射线衍射（XRD）分析证实，所有样品在掺杂范围内均保持单斜晶相。场发射扫描电镜（FESEM）显示，随着钴含量的增加，晶粒尺寸逐渐减小，而动态光散射（DLS）提供了详细的粒度分布曲线。光学研究证实，该纳米材料在300-800nm可见波长范围内表现出优异的吸收，Tauc的分析表明，钴掺杂有效地调节了CuO纳米颗粒的光学带隙。将合成的Cu1-xCoxO纳米材料作为FTO|Cu1-xCoxO|MAPbI3|CuPc|BCP|Al器件结构的功能接口。CuO纳米粒子的Co掺杂通过在界面层中适当的能带排列和电荷传导改善了器件的性能。在520nm光照强度为5mwcm−2的情况下，8% Co掺杂的CuO界面层的电流通断比为32.58，响应率为44 mA/W，探测率为2.6 × 108 Jones。我们的研究结果为考虑钴掺杂CuO纳米颗粒作为钙钛矿基器件中功能界面层的有希望的候选者铺平了道路，因为它们具有可调的光学特性，增强的电荷传输，以及与溶液处理结构的兼容性。

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引用次数: 0

Facile one-step synthesis of high surface area graphitic carbon nitride exhibiting exceptional photocatalytic rhodamine B degradation 一步合成高表面积石墨氮化碳，表现出优异的光催化罗丹明B降解

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2026-04-15 Epub Date: 2026-02-06 DOI: 10.1016/j.matchemphys.2026.132040

Mehran Bijari , Afsaneh Shahbazi , Nooshin Bijari

This study introduces a novel, environmentally sustainable, one-step synthesis method for producing graphitic carbon nitride (g-C₃N₄). The method is characterized by a high specific surface area and remarkable photocatalytic performance, achieved without the incorporation of additives. The synthesis involves combining two precursors, urea and melamine, in a 20/80 wt ratio, followed by thermal treatment under a CO₂ atmosphere to facilitate polymerization. The resultant g-C₃N₄ exhibits a significantly enhanced specific surface area, attributed to the synergistic effects of ammonia gas released during the thermal decomposition of urea and the presence of CO₂ in the polymerization environment. This interplay promotes efficient charge transfer and reduces electron-hole recombination. Consequently, the MU/CO₂ sample achieved a specific surface area of 173.3 m²/g. It demonstrated an impressive 99.2 % degradation rate of rhodamine B at 50 mg/L with a photocatalyst dosage of 0.2 g/L under 50-W LED-visible light irradiation. For comparative analysis, analogous samples were synthesized in air and nitrogen atmospheres. Additional investigations were conducted to assess various factors influencing degradation, reaction kinetics, reusability, and inhibition. This research provides valuable insights into the efficient production of high-quality g-C₃N₄, thereby circumventing the need for multiple synthesis processes or diverse modification additives.

本研究介绍了一种新的、环境可持续的一步合成石墨氮化碳（g-C3N4）的方法。该方法的特点是具有高比表面积和显著的光催化性能，无需添加添加剂即可实现。该合成包括将两种前体尿素和三聚氰胺以20/80的重量比结合，然后在二氧化碳气氛下进行热处理以促进聚合。由于尿素热分解过程中释放的氨气和聚合环境中存在的CO2的协同作用，所得的g-C3N4的比表面积显著增强。这种相互作用促进了有效的电荷转移，减少了电子-空穴复合。因此，MU/CO2样品的比表面积达到了173.3 m2/g。在50 w led -可见光照射下，光催化剂用量为0.2 g/L, 50 mg/L，罗丹明B的降解率达到99.2%。为了进行对比分析，在空气和氮气气氛中合成了类似的样品。进一步的研究评估了影响降解、反应动力学、可重用性和抑制的各种因素。该研究为高效生产高质量的g-C3N4提供了有价值的见解，从而避免了对多种合成工艺或多种改性添加剂的需要。

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