Materials Chemistry and Physics最新文献

{"title":"Synthesis of an amide-based gel as catalyst support for conversion of carbon dioxide","authors":"Zhaobin Ye,&nbsp;Jiawei Cui,&nbsp;Shasha Ma,&nbsp;Jie Xu,&nbsp;Di Chen,&nbsp;Jianyong Zhang","doi":"10.1016/j.matchemphys.2025.130982","DOIUrl":"10.1016/j.matchemphys.2025.130982","url":null,"abstract":"<div><div>The transformation of dynamic gels into covalent gels with stability with retention of gel matrix and porosity remains a challenge. Herein, an imine gel is synthesized employing dynamic covalent chemistry and is converted into an amide gel with chemical stability by oxidizing imine linkages into amide linkages. The transformation of imine gel into amide gel under mild conditions preserves the gel matrix, and the resulting amide gel can be used for catalysis in harsh chemical environments. Combined DFT and experiments verify the feasibility of the amide gel to improve the CO₂ adsorption. Moreover, a stable silver nanoparticles-based amide Ag@amide gel catalyst is prepared via an in-situ reduction route. The Ag@amide gel catalyst shows superior catalytic activity for the transformation of CO₂ into alkynyl carboxylic acids. Ag@amide can be easily recovered and reused for 5 times without significant change in activity. This work presents a facile way from self-assembled imine gels to stable amide gels that are used for CO₂ conversion.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 130982"},"PeriodicalIF":4.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of GPTMS-SiO2 nanofluid and its characterization for improving CO2 storage efficiency in saline aquifers: Dispersion stability, rheological and interfacial behaviors","authors":"Ingu Kang,&nbsp;Hyeyeon Kim,&nbsp;Hyunsang Yoo,&nbsp;Jeonghwan Lee","doi":"10.1016/j.matchemphys.2025.131010","DOIUrl":"10.1016/j.matchemphys.2025.131010","url":null,"abstract":"<div><div>The nanofluids (NFs) have shown promise in enhancing CO₂ storage efficiency by altering interfacial properties in saline aquifers. However, under harsh reservoir conditions such as high-temperature and high-salinity, NFs tend to aggregate, which can reduce their effectiveness and hinder storage performance. To address this issue, we presented the synthesis of a silica NFs through surface modification using (3-glycidoxypropyl)trimethoxysilane (GPTMS) to improve the efficiency of underground CO₂ storage. Dispersion stability of the synthesized NFs was evaluated by visual observation, dynamic light scattering (DLS), transmission electron microscopy (TEM), and miscibility tests under high-temperature and high-salinity conditions. Rheological and interfacial properties of the NFs were also investigated to provide the information on the flow of NFs in porous media. Over 7 d, visual observation showed that the NFs containing more than 0.5 wt% of nanoparticles (NPs) did not aggregate at 25 °C and 100 °C. DLS and TEM results revealed that the NFs concentrations above 0.5 wt% had a colloidal stability maintaining an average diameter below 100 nm even at high temperatures. Miscibility test showed that NFs containing more than 1.0 wt% of NPs remained stable under the high-salinity of 200,000 ppm. The viscosity measurements revealed that the viscosity of the NFs should be derived in the range of shear rate from 35.63 to 70.89 s⁻¹ at high-temperature. In addition, the validation by power law model showed that the proposed shear rate ranges were reliable and the NFs had a temperature-dependent shear thinning behavior. The interfacial tension (IFT) and contact angle (CA) measurements using a 1.0 wt% of the NF revealed reductions of 22.7 % in IFT and 35.1 % in CA compared to seawater. These results suggest that the NFs greater than 1.0 wt% can be used as injection fluids to improve the CO₂ storage efficiency.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 131010"},"PeriodicalIF":4.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication and characterization of functional chitosan/MXene composite films decorated with lead zirconate titanate nanoparticles","authors":"Öznur Doğan Ulu ,&nbsp;Ahmet Ulu ,&nbsp;Emre Birhanlı ,&nbsp;Mustafa Ersin Pekdemir ,&nbsp;Selçuk Atalay ,&nbsp;Ali Gelir ,&nbsp;Burhan Ateş","doi":"10.1016/j.matchemphys.2025.131022","DOIUrl":"10.1016/j.matchemphys.2025.131022","url":null,"abstract":"<div><div>The current study is intended to enhance unique bioactive and eco-friendly composite films following a simple solvent-casting method by incorporating lead zirconate titanate nanoparticles (PZT NPs) with chitosan (CHS)/MXene matrix. Different characterization techniques were used in the examination of the obtained composite films and the basic physicochemical properties, electrical properties, antioxidant and antibacterial activities of the composite films were determined. The swelling degree, water uptake, and water solubility of the CHS/MXene/PZT composite films decreased with the incorporation of PZT NPs, whereas the thermal stability increased. When PZT NPs were added, the tensile strength and elongation at break of composite films reached 1.32 MPa and 29.32 %, respectively, which were obviously higher than that of CHS/MXene film. Meanwhile, composite film had moderate antioxidant properties, which, interestingly, decreased with increasing PZT NPs content. In contrast, the obtained composite films showed good antibacterial activity against <em>E. coli</em> (11.00–16.80 mm) and <em>S. aureus</em> (12.20–18.60 mm), which gradually increased with the amount of PZT NPs. Meanwhile, the order of antibacterial activity was found to be <em>S. aureus</em> &gt; <em>E. coli</em>, showing the selectivity of composite films. These results will shed light on additive selection for functional composite films of several applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 131022"},"PeriodicalIF":4.3,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143946724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 of the magnetic properties and shielding effectiveness of yttrium iron garnet elongated structures fabricated inside alumina membranes by a sol-gel method","authors":"P.H. Pessoa ,&nbsp;L.K.S. Assis ,&nbsp;J.E. Abrão ,&nbsp;A.R. Santos ,&nbsp;A.R. Rodrigues ,&nbsp;E. Padrón-Hernández","doi":"10.1016/j.matchemphys.2025.131004","DOIUrl":"10.1016/j.matchemphys.2025.131004","url":null,"abstract":"<div><div>This study investigates the magnetic properties of elongated YIG nanostructures fabricated via a sol-gel process combined with vacuum-assisted deposition into porous alumina membranes. Structural characterization by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy confirmed successful nanopillar formation. Magnetic behavior was evaluated using ferromagnetic resonance (FMR) and vibrating sample magnetometry (VSM), revealing a remanence of 0.03 emu/g and a coercive field of 21 Oe, consistent with ferromagnetic behavior. FMR analysis indicated low magnetic anisotropy and a minimum linewidth at 40°, suggesting a hard magnetization axis at this angle. X-band magnetic shielding measurements yielded an average effectiveness of 0.55 dB. While modest, this result highlights the potential of YIG nanostructures in low-frequency shielding applications due to possible synergistic effects with the porous alumina matrix.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 131004"},"PeriodicalIF":4.3,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Defect Engineering in β-Ga2O3: Hybrid functional study on the formation and stability of copper substitutional and complex defects","authors":"Duy Khanh Nguyen ,&nbsp;Duong Trong Nhan ,&nbsp;Dang Phuc Dam ,&nbsp;Khuong Dien Vo ,&nbsp;Huynh Anh Huy ,&nbsp;Nguyen Thanh Tien ,&nbsp;Quoc Duy Ho","doi":"10.1016/j.matchemphys.2025.130962","DOIUrl":"10.1016/j.matchemphys.2025.130962","url":null,"abstract":"<div><div>The formation of single substitutional copper (Cu) at the gallium (Ga) site and Cu complex defects in monoclinic gallium oxide (β-Ga₂O₃) has been studied using an optimized hybrid functional approach. Our calculations show that substitutional Cu is more favorable at the octahedral Ga (Cu_Ga2) site compared to the tetrahedral Ga (Cu_Ga1) site. Furthermore, substitutional of Cu at gallium site (Cu_Ga) tends to form complex defects with oxygen vacancies (Cu_Ga-V_O) when both defects are present in the sample. The relative concentrations of single substitutional Cu_Ga and Cu_Ga-V_O complexes in β-Ga₂O₃ depend significantly on the crystal growth conditions. This study highlights the favorability of the Cu_Ga2 complex defect with oxygen 1 vacancy (V_O1) over other possible Cu_Ga-V_O configurations. Based on our results, we assign the Cu_Ga2 in the −1 charge state and Cu_Ga2+V_O1 in the +1 charge state to the Cu²⁺(A) and Cu²⁺(B) defect centers, respectively. Importantly, the study demonstrates that oxygen vacancies not only compensate acceptor dopants but also can form complex defects with Cu, acting as donor defects. These findings underscore the importance of carefully controlling oxygen vacancies and crystal growth methods when doping β-Ga₂O₃ with metals to achieve <em>p</em>-type conductivity, which is essential for optoelectronic applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 130962"},"PeriodicalIF":4.3,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144072419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phase transformation of coatings produced with micro-arc oxidation on plastically deformed titanium through hydrothermal treatment","authors":"Ł. Maj ,&nbsp;A. Trelka ,&nbsp;F. Muhaffel ,&nbsp;A. Góral ,&nbsp;A. Wierzbicka-Miernik ,&nbsp;P. Petrzak ,&nbsp;M.O. Cichocka ,&nbsp;M. Kulczyk ,&nbsp;U. Kolb","doi":"10.1016/j.matchemphys.2025.131001","DOIUrl":"10.1016/j.matchemphys.2025.131001","url":null,"abstract":"<div><div>In this study, the effect of hydrothermal treatment on the microstructure and residual stresses of micro-arc oxidation (MAO)-produced coatings on hydrostatically deformed commercially pure titanium was investigated. A detailed microstructure study of both as-deposited and hydrothermally treated coatings was conducted with scanning and transmission electron microscopy supported by ASTAR orientation mapping and chemical analysis via energy dispersive X-ray spectrometry. Macro-scale measurements of residual stresses were carried out using the classical sin²ψ method in an X-ray diffractometer (XRD), while the novel multi-HKL method, based on grazing-incidence XRD, was used to determine of the stresses at a specific depths. The results demonstrate that hydrothermal treatment is a highly efficient method allowing to fully transform the MAO coatings which initially contained a fraction of amorphous phase, into a fully crystalline structure, while preserving high mechanical properties. The grains of TiO₂-anatase crystallographic variant grow in various forms: equiaxed, elongated or nanorods, both at the expense of amorphous phase and due to coarsening of original ultra-fine grains. The low solubility of phosphorus and sodium in TiO₂-anatase resulted in a decrease in their content in hydrothermally treated coatings. For all the coatings, a favorable change in the stress field, to compressive stresses, was observed.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 131001"},"PeriodicalIF":4.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nickel-doped Zn-MOF for efficient adsorption of norfloxacin antibiotic: Adsorption behaviors and mechanisms","authors":"Junru Li,&nbsp;Hui Wang,&nbsp;Xuefei Wang,&nbsp;Jinmei Ye,&nbsp;Xiaodong Wang,&nbsp;Bingchun Xue","doi":"10.1016/j.matchemphys.2025.131005","DOIUrl":"10.1016/j.matchemphys.2025.131005","url":null,"abstract":"<div><div>In this study, a bimetallic nickel-doped Zn-MOF (Ni@Zn-MOF) was successfully fabricated by the hydrothermal method for the removal of norfloxacin (NOR) in pharmaceutical wastewater. The structural and surface characteristics of Ni@Zn-MOF were systematically characterized using SEM-EDS, BET, XRD, FT-IR, XPS, and Zeta potential analyses. The experimental results demonstrated that NOR could be effectively removed within a wide pH range from 3 to 11, achieving a maximum removal efficiency of approximately 94 % under optimal adsorption conditions. The adsorption behaviors of NOR were in good accordance with the pseudo-second-order kinetic model and the Freundlich isotherm model. The adsorption mechanism study revealed that the good adsorption performance originated from the synergistic effects of multiple interactions, including pore filling, metal coordination, electrostatic attraction, hydrogen bond, and π-π stacking interactions. Notably, the adsorption-saturated Ni@Zn-MOF demonstrated exceptional regeneration capability and stability, maintaining removal efficiencies above 60 % for NOR after five consecutive adsorption-desorption cycles. The current study suggests that the engineered Ni@Zn-MOF nanocomposite can be as a promising functional material for sustainable removal of residual antibiotic contaminants in practical wastewater treatment applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 131005"},"PeriodicalIF":4.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Process-structure relationship and microstructure evolution of Ti–22Al–25Nb alloy under heat treatment","authors":"Yanchun Zhu ,&nbsp;Fan Wang ,&nbsp;Shangwu Jia ,&nbsp;Jingfeng Zou ,&nbsp;Yuanyuan Luo ,&nbsp;Yong Niu ,&nbsp;Xia Yang ,&nbsp;Xuepeng Wang ,&nbsp;JiaXing Wang","doi":"10.1016/j.matchemphys.2025.131006","DOIUrl":"10.1016/j.matchemphys.2025.131006","url":null,"abstract":"<div><div>This paper investigates the Ti-22Al-25Nb alloy by first determining the phase transition points for each phase region using DSC and metallographic methods. It then examines the microstructure evolution under different heat treatment processes in the O+B2 and α₂+O+B2 phase regions. The study analyzes the effects of solid solution temperature, solid solution time, aging temperature, and aging time on the microstructure. It establishes models relating solid solution temperature to the average thickness of primary slat O, solid solution temperature to B2 grain size, and aging temperature to the average thickness of secondary slat O. Additionally, an error analysis of these models is conducted, providing valuable guidance for understanding the process-structure relationships in Ti-22Al-25Nb alloy.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 131006"},"PeriodicalIF":4.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Medical drug delivery analysis using molecular dynamics simulation of tomudex; thymidylate synthase inhibitor","authors":"Peyman Karimi ,&nbsp;Hossein Mashhadimoslem ,&nbsp;Moein Taheri ,&nbsp;Hedia Fgaier ,&nbsp;Ali A. AlHammadi ,&nbsp;Ali Elkamel","doi":"10.1016/j.matchemphys.2025.131002","DOIUrl":"10.1016/j.matchemphys.2025.131002","url":null,"abstract":"<div><div>In this research work, we created and modeled a unique drug protection mechanism employing double-walled carbon nanotubes (DWCNTs) to improve medication stability and delivery efficiency. The research involved the investigation anticancer medication's shielding of the ZD1694 within seven layers of DWCNTs using molecular dynamics simulations. We aim to investigate the protective effect of DWCNTs by comparing how drug activity is influenced in shielded and non-shielded configurations under mechanical pressure from a gold-tip. The analysis involves computing key structural properties, such as the radial distribution function (RDF) and mean squared displacement (MSD), to evaluate spatial atomic organization and particle mobility. Shielded arrangements show a significant decrease in molecular deformation, with a substantial decrease in MSD (0.872 Å²) compared to unshielded configurations (2.39 Å²). The elastic modulus (EM) and shear modulus (GM) of the DWCNT-shielded system are significantly higher (EM: 3.17 × 10⁻² GPa; GM: 4.76 × 10⁻² GPa) compared to the non-shielded system. This indicates an enhanced ability to resist volumetric and shear deformations. These findings open the door for more sophisticated nanobot-based drug delivery systems by proving that DWCNTs can successfully protect medications from mechanical stress, reducing structural disruption and improving stability.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 131002"},"PeriodicalIF":4.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thickness effects of ultrathin Pt spacer on perpendicular exchange coupling properties of TbFeCo bilayers with opposite phases","authors":"Ke Wang,&nbsp;Guanmei Chen,&nbsp;Zengli Guo,&nbsp;Baocheng Chen,&nbsp;Shangqian Wang","doi":"10.1016/j.matchemphys.2025.131003","DOIUrl":"10.1016/j.matchemphys.2025.131003","url":null,"abstract":"<div><div>Manipulating magnetic exchange coupling properties is of great importance for device applications. Controlling exchange coupling of perpendicularly magnetized multilayers, however, is challenging. In this work, we fabricate ferrimagnetic TbFeCo/Pt/TbFeCo structures consisting of two Tb-rich and FeCo-rich layers, separated by ultrathin Pt layers with thickness ranged from 0.4 to 3 nm. The adjustability of perpendicular exchange coupling between two ferrimagnetic layers by means of thickness of Pt spacer is demonstrated. For the structure with 0.8 nm Pt spacer or thinner a sharp single switching is observed, indicating a strong interlayer coupling. A two-step reversal with a negative exchange bias is demonstrated for the structure with Pt spacer thickness in the range of 1.6–3 nm, showing macroscopic antiferromagnetic coupling. For the structure with 1.6 nm Pt a large interfacial perpendicular coupling energy density of ∼0.4 erg/cm² is obtained by minor loop measurements. The exchange coupling strength is shown to rapidly decrease with increasing thickness of Pt spacer. By varying temperature a transition from ferromagnetic coupling to antiferromagnetic coupling type is witnessed near the compensation temperature of FeCo-rich layer in the structures. A shift of the minor loop of several hundred Oersteds is observed. A large interfacial perpendicular coupling energy density of ∼1 erg/cm² is obtained in the structure with 2 nm Pt spacer at 150 K. Our results show TbFeCo/Pt/TbFeCo structure with controllable perpendicular exchange bias may be of great importance for spintronic applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 131003"},"PeriodicalIF":4.3,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}