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Ice-phobic honeycomb-like nano SnO2 surfaces: Effect of pretreatment process on sustainable superhydrophobicity 疏冰蜂窝状纳米二氧化锡表面:预处理工艺对可持续超疏水性能的影响
IF 6.2 Q2 Materials Science Pub Date : 2024-06-17 DOI: 10.1016/j.apsadv.2024.100617
Elham Aghajanpour Amiri , Reza Norouzbeigi , Elmira Velayi

Superhydrophobic/Icephobic tin oxide honeycomb-like nanostructures were synthesized on copper surfaces via facile controlled hydrothermal method. Effects of two crucial fabrication parameters including etching treatment variables and presence the seed layer, on the morphology and wettability of the resulted coating were determined. The chemical composition, wettability characteristics, and topographical properties of the samples were characterized by FE-SEM, stylus profilometry, contact angle measurement, and ATR-FTIR analyses. The wettability evaluations confirmed that the tin oxide deposited on the copper oxide (seed layer) exhibited excellent superhydrophobic properties. The prepared hierarchical surfaces showed high water contact angles (CA) as well as 169. 5±1 with a contact angle hysteresis (CAH) of 5°± 1°. Moreover, the results confirmed that the etching treatment and the presence of the seed layer can promote the morphology to a uniform state. The ice adhesion strength of the obtained superhydrophobic surfaces reached to 30.4 kPa, showing an excellent ice-phobicity. The mechanical resistance and/or sustainability of the optimized sample was also passed successfully under 10 abrasion test cycles.

通过简便的可控水热法在铜表面合成了超疏水/疏油氧化锡蜂窝状纳米结构。研究确定了蚀刻处理变量和种子层的存在这两个关键制造参数对所得涂层的形貌和润湿性的影响。样品的化学成分、润湿性特征和形貌特性通过 FE-SEM、测针轮廓仪、接触角测量和 ATR-FTIR 分析进行了表征。润湿性评估证实,沉积在氧化铜(种子层)上的氧化锡具有优异的超疏水特性。制备的分层表面显示出很高的水接触角(CA)以及 169.5∘±1∘,接触角滞后(CAH)为 5°± 1°。此外,研究结果还证实,蚀刻处理和种子层的存在可促进形貌达到均匀状态。所获得的超疏水表面的冰粘附强度达到 30.4 kPa,显示出极佳的疏冰性。优化样品的机械阻力和/或可持续性也在 10 次磨损测试循环中顺利通过。
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引用次数: 0
Nitrogen-functionalized catalyst synthesized using spent coffee ground biochar-cobalt hybrid for oxygen reduction reaction via pyrolysis and ball-milling 通过热解和球磨,利用废咖啡粉生物炭-钴混合物合成氮功能化催化剂,用于氧还原反应
IF 6.2 Q2 Materials Science Pub Date : 2024-06-14 DOI: 10.1016/j.apsadv.2024.100614
Mohamad Ayoub , Abdul Hai Alami , Mohammad Ali Abdelkareem , A.G. Olabi

In this work, oxygen reduction reaction (ORR) catalysts were developed from a precursor of spent coffee ground-based biochar. Nitrogen doping was achieved via urea addition preceding a pyrolysis synthesis process, yielding nitrogen-doped biochar (NDB). Cobalt was deposited onto the NDB surface using a non-conventional ball-milling procedure. The microstructure of the synthesized samples was studied through Scanning Electron Microscopy (SEM), where a rather distorted surface, highlighted by prominent wrinkles (which doubled the surface area at 50.58 m2/g), was shown for nitrogen-doped samples. Moreover, the high energy ball-milling technique shows an almost perfect coverage of cobalt nanoparticles on the biochar surface through SEM/EDS and Raman results. Additionally, electrochemical testing was conducted using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Cyclic voltammetry measurements conducted under nitrogen (inert) and oxygen-saturated alkaline solution (0.1 M KOH) conditions showed that nitrogen doping enhances the oxygen reduction reaction current (-1 vs -0.59 mA.cm−1 at -0.3 V vs Hg/HgO) and slightly reduces the onset potential compared to pristine biochar. Depositing cobalt onto the NDB surface had a minor adverse effect on the onset potential, but significantly increased the oxygen reduction reaction current, reaching a value of -2.09 mA.cm−2 at -0.3 V vs Hg/HgO. All catalysts were compared to a commercial carbon supported platinum catalyst (Pt10%C) to showcase the potential room of improvement for the developed catalysts.

在这项研究中,利用废咖啡渣生物炭为前驱体开发了氧还原反应(ORR)催化剂。在热解合成过程之前,通过添加尿素实现了氮掺杂,得到了氮掺杂生物炭(NDB)。采用非常规球磨程序将钴沉积到 NDB 表面。通过扫描电子显微镜(SEM)研究了合成样品的微观结构,结果显示掺氮样品的表面相当扭曲,突出表现为明显的皱纹(使表面积增加了一倍,达到 50.58 m2/g)。此外,高能球磨技术的 SEM/EDS 和拉曼结果表明,钴纳米颗粒几乎完美地覆盖了生物炭表面。此外,还使用循环伏安法(CV)和电化学阻抗谱法(EIS)进行了电化学测试。在氮气(惰性)和氧气饱和碱性溶液(0.1 M KOH)条件下进行的循环伏安测量表明,与原始生物炭相比,氮掺杂增强了氧还原反应电流(-1 vs -0.59 mA.cm-1 at -0.3 V vs Hg/HgO),并略微降低了起始电位。在 NDB 表面沉积钴对起始电位的不利影响较小,但却显著提高了氧还原反应电流,在 -0.3 V 对 Hg/HgO 时达到 -2.09 mA.cm-2 的值。所有催化剂都与商用碳支撑铂催化剂(Pt10%C)进行了比较,以展示所开发催化剂的潜在改进空间。
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引用次数: 0
Utilizing MoO3, MoO3 doped Y2O3 for heavy metals (Hg, Pb, Cu) removal from wastewater monitored by p-XRF and LIBS techniques 通过对 XRF 和 LIBS 技术监测利用氧化钼和掺杂氧化钼的 Y2O3 去除废水中的重金属(汞、铅、铜
IF 6.2 Q2 Materials Science Pub Date : 2024-06-07 DOI: 10.1016/j.apsadv.2024.100613
Amal L. Olatibi , Nadiah Y. Aldaleeli , Nafla ELtamimi , Khaled A. Elsayed , Nabil A. Abdel Ghany , Asmaa Elhassan

In this study the heavy metals (Cu2+, Pb2+, Hg+2) were removed from waste water using two types of sorbents, namely, MoO3 and MoO3 doped with 12 %Y2O3 were synthesized by solgel method. The as-prepared oxides were characterized using X-ray diffraction (XRD), Scanning electron microscope (SEM), Transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS). A combination of quantitative and qualitative analysis techqnieus, portable X-ray fluorescence (pXRF) and laser-induced breakdown spectroscopy (LIBS) were used to evaluate the removing efficency. Calibration curves were performed to elucidate the limit of detection (LOD) of the Laser-Induced Breakdown Spectroscopy (LIBS) technique for the removal process The LOD were 1.65, 2–21 and 0.98 ppm for Cu, Pb and Hg respectively. The results indicated that the Y2O3-doped α-MoO3 has a consistently greater removal efficiency compared to MoO3. The removal effecieny of Hg2+, Pb2+ and Cu2+ was 95 %, 33 % and 21 % respectively with MoO3 while it was 98 % 63 % 35 % for MoO3 doped Y2O3, The results proved also that MoO3 and MoO3 doped Y2O3 nanoparticles can be utilized as cost effective adsorbent material for heavy metal removal in wastewater. The study showed the potential of using Laser-Induced Breakdown Spectroscopy (LIBS) in environmental applications.

本研究使用两种吸附剂去除废水中的重金属(Cu2+、Pb2+、Hg+2),这两种吸附剂分别是通过溶胶凝胶法合成的 MoO3 和掺杂 12%Y2O3 的 MoO3。利用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、透射电子显微镜 (TEM) 和 X 射线光电子能谱 (XPS) 对制备的氧化物进行了表征。定量和定性分析技术、便携式 X 射线荧光(pXRF)和激光诱导击穿光谱(LIBS)相结合,用于评估去除效率。对铜、铅和汞的检测限分别为 1.65、2-21 和 0.98 ppm。结果表明,与 MoO3 相比,掺杂 Y2O3 的 α-MoO3 具有更高的去除效率。MoO3 对 Hg2+、Pb2+ 和 Cu2+ 的去除率分别为 95%、33% 和 21%,而掺杂 MoO3 的 Y2O3 对 Hg2+、Pb2+ 和 Cu2+ 的去除率为 98%、63% 和 35%。这项研究显示了激光诱导击穿光谱(LIBS)在环境应用方面的潜力。
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引用次数: 0
ZrN coating as a source for the synthesis of a new hybrid ceramic layer 以 ZrN 涂层为原料合成新型混合陶瓷层
IF 6.2 Q2 Materials Science Pub Date : 2024-06-07 DOI: 10.1016/j.apsadv.2024.100615
Roman Gabor , Ladislav Cvrček , Marie Kudrnová , Josef Hlinka , Marek Večeř , Matěj Buřil , Jan Walter , Miha Čekada , Aljaž Drnovšek , Petr Unucka , Kateřina Mamulová Kutláková , Oldřich Motyka , Jana Seidlerová

The study focuses on an innovative process for the use of a ZrN coating on Ti6Al4V alloy for orthopaedic bone implants. The preparation process combines the technology of physical vapour deposition (PVD) and micro-arc oxidation (MAO) to achieve hydrophobic properties, improved corrosion resistance and enhanced coating adhesion to Ti6Al4V alloy. An alkaline electrolyte and different microarc discharge intensities were used to prepare MAO coatings. The evaluation of the structure and topography of the coatings was performed using SEM with XRPD, EDX, and XPS analysis. The prepared oxide coatings Zr, ZrSiO4, and ZrTiO4 increase the corrosion potential depending on the applied source frequency and thus increase the corrosion resistance of the hybrid system. At the same time, the formation of oxide phases leads to changes in surface topography associated with increasing friction coefficient and better wear resistance.

这项研究的重点是在用于矫形骨植入物的 Ti6Al4V 合金上使用 ZrN 涂层的创新工艺。该制备工艺结合了物理气相沉积(PVD)和微弧氧化(MAO)技术,可实现疏水特性、提高耐腐蚀性并增强涂层对 Ti6Al4V 合金的附着力。制备 MAO 涂层时使用了碱性电解质和不同的微弧放电强度。使用扫描电镜结合 XRPD、EDX 和 XPS 分析对涂层的结构和形貌进行了评估。制备的氧化物涂层 Zr、ZrSiO4 和 ZrTiO4 可根据应用的源频率提高腐蚀电位,从而提高混合系统的耐腐蚀性。同时,氧化物相的形成导致了表面形貌的变化,从而提高了摩擦系数和耐磨性。
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引用次数: 0
Recent advancements in the surface modification and functionalization of magnetic nanomaterials 磁性纳米材料表面改性和功能化的最新进展
IF 6.2 Q2 Materials Science Pub Date : 2024-05-17 DOI: 10.1016/j.apsadv.2024.100608
G. Murali Manoj , M. Shalini , K. Thenmozhi , Vinoth Kumar Ponnusamy , Shankar Hari

Magnetic nanomaterials (MNMs) with metallic and semiconducting properties are useful in energy conversion, energy storage, environmental, biomedical, agricultural applications thanks to their large surface area, charge carrier mobility, optical band structure, non-toxic nature, and ability to recover and recycle. However, their poor stability, agglomeration, lack of biocompatibility, fast electron-hole recombination, and leaching in acidic environments restrict bare MNMs for real-time applications. There are several approaches employed to overcome these issues, such as elemental doping, defect formation, nanocomposites, and surface functionalization. Among them, functionalization is one of the promising techniques to alter various properties of MNMs such as specific morphology, size, facet, crystalline phase, and electron mobility. Functionalized MNMs have been explored for various areas of research, including biomedical and environmental applications such as MRI, drug delivery, catalysis, solar hydrogen production, sensors, water and air purification. In this short perspective, promising advances in various functionalization strategies such as surface modification, amino functionalization, polymer functionalization, and biomolecule functionalization, techniques were consolidated, reviewed and their various applications are discussed in detail.

具有金属和半导体特性的磁性纳米材料(MNMs)因其大表面积、电荷载流子迁移率、光带结构、无毒性以及可回收和循环利用的能力,在能量转换、能量存储、环境、生物医学和农业应用中非常有用。然而,裸 MNMs 的稳定性差、易团聚、缺乏生物相容性、电子-空穴快速重组以及在酸性环境中的浸出等问题限制了它们的实时应用。有几种方法可以克服这些问题,如元素掺杂、缺陷形成、纳米复合材料和表面功能化。其中,功能化是改变 MNMs 各种特性(如特定形貌、尺寸、刻面、晶相和电子迁移率)的有前途的技术之一。功能化 MNMs 已被用于多个研究领域,包括生物医学和环境应用,如核磁共振成像、药物输送、催化、太阳能制氢、传感器、水和空气净化等。在这篇短文中,对各种功能化策略(如表面改性、氨基功能化、聚合物功能化和生物分子功能化)的进展进行了整合和回顾,并详细讨论了它们的各种应用。
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引用次数: 0
The interface between Pt and Bi2Se3: Instability and formation of a new ordered phase 铂与 Bi2Se3 之间的界面:不稳定性与新有序相的形成
IF 6.2 Q2 Materials Science Pub Date : 2024-05-16 DOI: 10.1016/j.apsadv.2024.100610
Mattia Fanetti, Katja Ferfolja, Sandra Gardonio, Matjaž Valant

In this work the interface between a Pt film and a Bi2Se3 (0001) surface is investigated using electron microscopy and microanalysis, in order to characterize the structure of the interface and verify if it is chemically stable or an interaction occurs. At room temperature, the Pt film is composed of small clusters (∼10 nm) and the interface is stable. However, already upon mild annealing (200 °C) the interface displays instability and forms an interfacial phase. The interfacial phase, not previously reported in literature, is a long-range ordered ternary Pt:Bi:Se phase aligned with the Bi2Se3 crystal, most probably an intermetallic compound. The presence of a new phase at Pt/Bi2Se3 interface, together with the possible effects on the topological surface states, has to be considered in all the applied studies where this interface is present, as well as in the models for theoretical studies.

这项研究利用电子显微镜和显微分析法对铂薄膜和 Bi2Se3 (0001) 表面之间的界面进行了研究,以确定界面结构的特征,并验证其化学性质是否稳定或是否发生了相互作用。室温下,铂膜由小团块(10 纳米)组成,界面稳定。然而,在温和退火(200 °C)时,界面就显示出不稳定性,并形成界面相。该界面相是一种与 Bi2Se3 晶体对齐的长程有序三元铂:铋:硒相,很可能是一种金属间化合物,此前未在文献中报道过。Pt/Bi2Se3 界面新相的出现,以及对拓扑表面态可能产生的影响,必须在存在该界面的所有应用研究以及理论研究模型中加以考虑。
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引用次数: 0
A comparative study of lithium salts for the corrosion inhibition of 2024 aluminium alloy 锂盐对 2024 铝合金缓蚀作用的比较研究
IF 6.2 Q2 Materials Science Pub Date : 2024-05-11 DOI: 10.1016/j.apsadv.2024.100606
Anh Truc Trinh , Anh Son Nguyen , Thu Thuy Thai , Nicolas Caussé , Nadine Pébère

In the present work, the corrosion inhibition of AA2024 by lithium salts (nitrate, oxalate and carbonate) is investigated by using both global and local electrochemical techniques. With LiNO3 (0.1 M), the anodic and cathodic current densities are lower and the impedance values higher by comparison with the results obtained in the presence of 0.1 M Li2C2O4 or 0.1 M Li2CO3. After 20 h of immersion in the electrolyte, SEM observations reveal the formation of thick films on the AA2024 surface in the presence of carbonate or oxalate, whereas a thin and denser film is formed in the presence of nitrate. Specifically, the Li2C2O4 addition, by increasing the pH of the electrolyte, induces significant alloy dissolution from the very beginning of immersion which contributes to the growth of a protective layer on the alloy surface, combining lithium, carbonate species and metal cations.

A self-healing effect by Li2C2O4 or Li2CO3 is shown by local impedance measurements on artificial scratches made on a water-based epoxy coating deposited on AA2024 plates, confirming their potential use, as inhibitive species, in organic coatings.

本研究采用全局和局部电化学技术研究了锂盐(硝酸盐、草酸盐和碳酸盐)对 AA2024 的腐蚀抑制作用。与存在 0.1 M Li2C2O4 或 0.1 M Li2CO3 时的结果相比,使用 LiNO3(0.1 M)时,阳极和阴极电流密度较低,阻抗值较高。在电解液中浸泡 20 小时后,扫描电子显微镜的观察结果表明,在碳酸盐或草酸盐存在的情况下,AA2024 表面形成了厚膜,而在硝酸盐存在的情况下,则形成了更薄更致密的膜。通过对沉积在 AA2024 板上的水性环氧树脂涂层上的人工划痕进行局部阻抗测量,显示了 Li2C2O4 或 Li2CO3 的自愈效应,这证实了它们作为抑制剂在有机涂层中的潜在用途。
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引用次数: 0
Iron-based graphene composite for oxygen reduction reaction in alkaline media: Electrocatalytic activity and lifetime evaluation 用于碱性介质中氧还原反应的铁基石墨烯复合材料:电催化活性和寿命评估
IF 6.2 Q2 Materials Science Pub Date : 2024-05-10 DOI: 10.1016/j.apsadv.2024.100609
Adriana Vulcu, Teodora Radu, Alexandru Turza, Camelia Berghian-Grosan

The development of electrocatalysts with high catalytic performance and low costs for oxygen reduction reaction (ORR) is still challenging. Herein, an overall solution for ORR in alkaline media, from the catalyst synthesis to catalyst regeneration and to the development of a rapid, reliable and easy approach for electrode surface evaluation, is presented. We focused on the development and characterization of an efficient material for ORR in alkaline media, α-Fe2O3 N-doped graphene (Fe-N-Gr). The associative pathway for the four electron transfer ORR mechanism is sustained by the Raman spectra recorded from the electrode surface. We highlighted the possibility of catalyst regeneration by a simple electrochemical method. After two regeneration rounds and 1500 cycles in O2-saturated 1 M NaOH, the catalyst still retains 40.8 % catalytic activity. Finally, as a part of the overall solution, we demonstrated that a methodology based on Raman spectroscopic measurements and machine learning algorithms can be applied for graphene-based catalysts lifetime investigation.

开发催化性能高、成本低的氧还原反应(ORR)电催化剂仍是一项挑战。本文介绍了碱性介质中氧还原反应的整体解决方案,包括从催化剂合成到催化剂再生,以及开发快速、可靠和简便的电极表面评估方法。我们重点研究了碱性介质中 ORR 的高效材料 α-Fe2O3 N 掺杂石墨烯(Fe-N-Gr)的开发和表征。电极表面记录的拉曼光谱证实了四电子转移 ORR 机制的关联途径。我们强调了通过简单的电化学方法进行催化剂再生的可能性。在氧气饱和的 1 M NaOH 中进行两轮再生和 1500 个循环后,催化剂仍保持 40.8% 的催化活性。最后,作为整体解决方案的一部分,我们证明了基于拉曼光谱测量和机器学习算法的方法可用于石墨烯基催化剂寿命调查。
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引用次数: 0
Enhancing corrosion resistance in Mg‒based alloys through MOF‒incorporated coatings: A comprehensive review 通过加入 MOF 的涂层增强镁基合金的耐腐蚀性:综述
IF 6.2 Q2 Materials Science Pub Date : 2024-05-08 DOI: 10.1016/j.apsadv.2024.100607
Arash Fattah-alhosseini , Zahra Sangarimotlagh , Minoo Karbasi , Burak Dikici

Mg-based alloys are used in various industrial sectors due to the unique combination of mechanical and biomedical behaviors. However, they are challenging in terms of corrosion protection and do not produce a protective oxide layer on their surface. The unregulated corrosion rate of these alloys restricts their application. One of the strategies that can provide a protective coating that prevents the direct contact of corrosive media with the substrates is coating on magnesium and its alloys. In recent years, MOF‒MOF-containing coatings have been investigated as a means of protecting various metal alloys against corrosion. The results show that these inhibitors have significantly reduced the rate of metal dissolution by affecting the kinetics of electrochemical reactions and greatly increasing corrosion resistance. So, these coatings are useful for increasing the corrosion resistance of magnesium alloys. Also, the anti-corrosion mechanisms and performance of MOFs in the coating matrix are discussed accordingly. This review article attempts to highlight the importance of MOFs for coating applications and enhancing corrosion resistance.

镁基合金具有独特的机械性能和生物医学性能,因此被广泛应用于各个工业领域。然而,它们在腐蚀保护方面具有挑战性,其表面不会产生保护性氧化层。这些合金不受控制的腐蚀速率限制了它们的应用。对镁及其合金进行涂层处理是提供保护层以防止腐蚀性介质与基材直接接触的策略之一。近年来,含 MOF-MOF 的涂层已被研究作为保护各种金属合金免受腐蚀的一种手段。研究结果表明,这些抑制剂通过影响电化学反应的动力学,大大降低了金属的溶解速率,并极大地提高了耐腐蚀性。因此,这些涂层有助于提高镁合金的耐腐蚀性。此外,文章还对涂层基质中 MOFs 的抗腐蚀机理和性能进行了相应的讨论。本综述文章试图强调 MOFs 在涂层应用和增强耐腐蚀性方面的重要性。
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引用次数: 0
Green nanoparticles for advanced corrosion protection: Current perspectives and future prospects 用于高级腐蚀防护的绿色纳米粒子:当前视角与未来前景
IF 6.2 Q2 Materials Science Pub Date : 2024-04-30 DOI: 10.1016/j.apsadv.2024.100605
Sandeep Yadav , Anirudh P.S. Raman , Madhur B. Singh , Iona Massey , Prashant Singh , Chandrabhan Verma , Akram AlFantazi

The article discusses the function of green nanoparticles in preventing corrosion of different alloys such as copper, zinc, steel, and aluminium alloys. Green nanoparticles are characterized by their environmentally friendly and sustainable production methods, which emphasize using natural materials. Environmental issues have long been linked to traditional corrosion inhibitors, which has led to a shift towards more environmentally friendly alternatives. A potential remedy for these issues is the use of green nanoparticles, which are derived from renewable and biodegradable resources. Green nanoparticles support sustainability goals and have strong corrosion inhibition properties. Their combined role makes them essential players in a future where environmental awareness and material safety coexist. The review envisages a significant paradigm shift in critical industrial contexts, which calls for a robust and ecologically friendly approach to corrosion prevention. Green nanoparticles can potentially transform the field of materials protection entirely, and their investigation as corrosion inhibitors opens up new directions for study and development. In conclusion, this review highlights the crucial role of these nanoparticles in creating a sustainable future where creative solutions will enhance industrial productivity and environmental well-being. Finally, the prospects and difficulties of sustainably applying green nanoparticles to corrosion inhibition have also been explored.

文章讨论了绿色纳米粒子在防止铜、锌、钢和铝合金等不同合金腐蚀方面的功能。绿色纳米粒子的特点是采用环保和可持续的生产方法,强调使用天然材料。长期以来,环境问题一直与传统的缓蚀剂有关,这促使人们转向使用更环保的替代品。解决这些问题的潜在方法是使用绿色纳米粒子,这种粒子来自可再生和可生物降解的资源。绿色纳米粒子支持可持续发展目标,并具有很强的缓蚀特性。它们的综合作用使其成为未来环境意识与材料安全并存的重要角色。综述认为,关键工业领域的模式将发生重大转变,这就要求采用一种稳健且生态友好的防腐蚀方法。绿色纳米粒子有可能彻底改变材料保护领域,其作为腐蚀抑制剂的研究开辟了新的研究和发展方向。总之,本综述强调了这些纳米粒子在创造可持续未来中的关键作用,在可持续未来中,创造性的解决方案将提高工业生产力和环境福祉。最后,还探讨了可持续地将绿色纳米粒子应用于缓蚀的前景和困难。
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引用次数: 0
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