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Sol-gel synthesis, characterizations of efficient Y3+ doped ZnO nanoparticles for photocatalytic dye degradation and energy storage applications 用于光催化染料降解和储能应用的高效Y3+掺杂ZnO纳米颗粒的溶胶-凝胶合成、表征
IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Pub Date : 2024-10-25 DOI: 10.1007/s10971-024-06597-1
Asad ur Rehman Khan, Muhammad Ramzan, Sajawal ur Rehman Khan, Islem Abid, Faisal Saud Binhuday, Muhammad Abdul Majid, Abdul Rehman, Abhishek Singh

In this study, we report on the crystallographic, optical, and electrochemical properties of Yttrium (Y³⁺) doped ZnO nanoparticles synthesized by using the sol-gel method. The incorporation of Y³⁺ ions resulted in a significant reduction in the optical bandgap, from 3.26 eV for pure ZnO to 2.67 eV for Y-C nanoparticles, improving their light absorption capacity under visible light. X-ray diffraction analysis revealed a hexagonal wurtzite structure, showing an increase in crystallite size with the incorporation of Y³⁺ doping. This was accompanied by superior photocatalytic performance, where Y-B (4% Y³⁺) doped ZnO nanoparticles exhibited remarkable 97% degradation efficiency for methylene blue (MB), 4.4 times greater than that of undoped ZnO. Electrochemical analysis revealed an improvement in specific capacitance, ranging from 20.56 F/g to 75.88 F/g at various scan rates, highlighting the potential of Y-ZnO as a material for energy storage applications. These enhancements can be attributed to the unique influence of Y³⁺ ions, which induce lattice expansion and promote charge transfer efficiency. The synthesized Y3+ doped ZnO nanoparticles can be potential candidates for industrial applications such as environmental remediation through photocatalysis, and energy storage devices like supercapacitors.

Graphical Abstract

在这项研究中,我们报道了用溶胶-凝胶法合成的钇(Y³)掺杂ZnO纳米粒子的晶体学、光学和电化学性能。Y³+离子的掺入导致光学带隙显著减小,从纯ZnO的3.26 eV降至Y- c纳米颗粒的2.67 eV,提高了它们在可见光下的光吸收能力。x射线衍射分析显示为六方纤锌矿结构,Y³⁺掺杂后晶体尺寸增大。这还伴随着优异的光催化性能,其中Y- b (4% Y³)掺杂的ZnO纳米颗粒对亚甲基蓝(MB)的降解效率达到97%,是未掺杂ZnO的4.4倍。电化学分析显示,在不同扫描速率下,Y-ZnO的比电容从20.56 F/g到75.88 F/g不等,这突出了Y-ZnO作为储能材料的潜力。这些增强可以归因于Y³+离子的独特影响,它可以诱导晶格膨胀并提高电荷转移效率。合成的Y3+掺杂ZnO纳米颗粒可以作为工业应用的潜在候选物,如通过光催化进行环境修复,以及超级电容器等储能器件。图形抽象
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引用次数: 0
Synthesis and characterization of perovskite based rGO nanomaterial for energy storage application 储能用钙钛矿基氧化石墨烯纳米材料的合成与表征
IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Pub Date : 2024-10-25 DOI: 10.1007/s10971-024-06587-3
Kashan Ali Geelani, F. F. Alharbi, Abdullah G. Al-Sehemi, A.M.A. Henaish

The consumption of renewable energy sources has seen a rapid and significant increase in the last decade, hence enhancing the need for the prompt progress of an energy storage setup. Advancing the properties of fabricated electrodes might potentially resolve this kind of issue. The perovskite based nanocomposite with carbonations materials has several applications, particularly in energy conversion and storage. Here, a new MgCeO3/rGO nanocomposite material was fabricated using the hydrothermal method for the energy storage system. In this article, the physical behavior of the synthesized material MgCeO3/rGO composite were examined through physical as well as electrical properties by electrochemical techniques. In MgCeO3/rGO composite rGO enhanced the surface area due to redox activity increased. The electrochemical behavior of the MgCeO3/rGO nanocomposite sample had a specific capacitance (Cs) value (1494.65 F g−1) at 1 A·g−1. Moreover, the fabricated electrode illustrated the best cycle stability after successive 5000th cycle Additionally, enhanced in electrochemical characteristics of prepared MgCeO3/rGO composite can be attributed to its extensive surface area, negligible resistances and swift flow of electrolyte ions compared to the individual substances. Moreover, in the future, the MgCeO3/rGO composite, which can be used to fabricate the electrode material, can be used in diverse electrochemical applications as electrode material in storage mechanisms.

Graphical Abstract

在过去十年中,可再生能源的消费迅速而显著地增加,因此加强了对储能装置迅速取得进展的需求。提高制备电极的性能可能会潜在地解决这类问题。钙钛矿基纳米复合材料具有多种应用,特别是在能量转换和存储方面。本文采用水热法制备了一种新型的MgCeO3/rGO纳米复合材料用于储能系统。本文通过电化学技术对合成的MgCeO3/rGO复合材料的物理性能和电学性能进行了表征。在MgCeO3/rGO复合材料中,由于氧化还原活性增加,rGO的表面积增强。在1 a·g−1时,MgCeO3/rGO纳米复合材料样品的电化学行为具有1494.65 F g−1的比电容(Cs)值。此外,制备的MgCeO3/rGO复合材料在连续5000次循环后表现出最佳的循环稳定性。此外,与单个物质相比,制备的MgCeO3/rGO复合材料具有广泛的表面积,可忽略的电阻和快速的电解质离子流动,从而增强了电化学特性。此外,在未来,可用于制造电极材料的MgCeO3/rGO复合材料可作为电极材料用于各种电化学应用中的存储机制。图形抽象
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引用次数: 0
Effect of different substrates on the structural, morphological, electrical, and optical properties of β-Ga2O3 thin films deposited by the sol-gel spin coating method 不同衬底对溶胶-凝胶自旋镀膜法制备β-Ga2O3薄膜结构、形貌、电学和光学性能的影响
IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Pub Date : 2024-10-24 DOI: 10.1007/s10971-024-06585-5
Lobna Messeddek, Fatma Amraoui, Louiza Arab, Nouredine Sengouga

β-Ga₂O₃ thin films were successfully deposited on sapphire, quartz, and silicon substrates using a sol-gel spin coating method. This study aims to investigate the influence of different substrates on the properties of β-Ga₂O₃ thin films. The properties of the films were analyzed using various techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM, TUNA), Fourier transform infrared (FTIR) spectroscopy, and ultraviolet-visible (UV-Vis) spectrophotometry. XRD analyses revealed that all deposited films exhibited a polycrystalline structure with a monoclinic β-phase, with the best crystallinity observed on the sapphire substrate, showing a crystallite size of 35.92 nm. SEM micrographs displayed a granular morphology with varying granule sizes. AFM (TUNA) analysis was used to examine surface morphology and current transport characteristics, showing that surface roughness increased from quartz to sapphire to silicon (2.94 nm, 4.8 nm, and 7.01 nm, respectively). Electrical resistivity increased in the order: quartz, silicon, and sapphire. The highest transmission, nearly 100% in the visible spectrum, was observed for the β-Ga₂O₃ film grown on the sapphire substrate, which also had a band gap of approximately 5.4 eV as evaluated from UV-Vis spectrophotometry.

Graphical Abstract

利用溶胶-凝胶自旋镀膜方法成功地在蓝宝石、石英和硅基片上沉积了β-Ga₂O₃薄膜。本研究旨在研究不同衬底对β-Ga₂O₃薄膜性能的影响。利用x射线衍射(XRD)、扫描电子显微镜(SEM)、原子力显微镜(AFM, TUNA)、傅里叶变换红外光谱(FTIR)和紫外可见分光光度(UV-Vis)等技术对膜的性能进行了分析。XRD分析表明,所有沉积膜均呈现单斜β相的多晶结构,其中蓝宝石衬底上的结晶度最高,晶粒尺寸为35.92 nm。扫描电镜显示颗粒形态,颗粒大小不一。AFM (TUNA)分析表明,表面粗糙度从石英到蓝宝石再到硅均有所增加(分别为2.94 nm、4.8 nm和7.01 nm)。电阻率增加的顺序为:石英、硅、蓝宝石。在蓝宝石衬底上生长的β-Ga₂O₃薄膜的透射率最高,在可见光谱中接近100%,其带隙约为5.4 eV。图形抽象
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引用次数: 0
Designing an eco-friendly Co/MnS/S-g-C3N4 nanocomposites: revolutionizing photocatalytic dye degradation and antibacterial efficiency 设计一种环保的Co/MnS/S-g-C3N4纳米复合材料:革命性的光催化染料降解和抗菌效率
IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Pub Date : 2024-10-23 DOI: 10.1007/s10971-024-06592-6
Yasmeen Khan, Sajid Mahmood, Mohsin Javed, Sana Mansoor, Misbah Umar, Sammia Shahid, Ammar Zidan, Rabia Nawaz, Shahid Iqbal, Abd-ElAziem Farouk, Salman Aloufi, Hala M. Abdelmigid, Toheed Akhter

This study utilized an eco-friendly, simple, and cost-effective co-precipitation method to synthesize pure MnS and a series of Co/MnS nanoparticles (NPs) with varying cobalt contents (2%, 4%, 6%, 8%, and 10%). Thiourea was calcined at 552 °C to prepare S-g-C3N4 (SCN) nanosheets. The optimal doped NPs were combined with S-g-C3N4 to create a series of nanocomposites (10%, 30%, 50%, 70%, and 90%). The materials band gap (Eg) values were determined using Tauc plots. Photodegradation of MB dye was conducted with a UV-Vis spectrophotometer. According to the best of our knowledge, Sulfur-doped graphitic carbon nitride (S-g-C₃N₄) has been used for the first time in combination with cobalt and manganese sulfide nanoparticles to synergistically enhance visible-light photocatalytic activity, enabling efficient degradation of a toxic organic dye methylene blue. Besides photocatalytic treatment, the antibacterial results reveal that (Co /MnS/ S-g-C₃N₄) effectively destroyed bacteria with a synergy effect among cobalt elements, MnS and S-g-C₃N₄. Results indicated that doping 6% cobalt into the MnS lattice enhanced photocatalytic oxidation/reduction. The highest photodegradation performance was observed in 6% Co/MnS@10% SCN nanocomposites, attributed to improved charge separation and reduced charge recombination. The synthesized nano-catalysts maintained significant degradation percentages even after three cycles. The structural morphologies of pure MnS, 6% Co/MnS, S-g-C3N4, and 6% Co/MnS@ 10% SCN nanocomposites were analyzed using XRD and FTIR. Kinetic studies of the prepared nanomaterials were conducted to determine their rate constants. The antibacterial performance of the best photocatalysts was tested against Bacillus subtilis and Escherichia coli. The results suggest that composite synthesis and doping enhanced the antibacterial activity of MnS, with the trend for antimicrobial activity being MnS < 6% Co/MnS < 6% Co/MnS@10% SCN.

Graphical Abstract

本研究采用一种环保、简单、经济的共沉淀法合成了纯MnS和一系列钴含量(2%、4%、6%、8%和10%)不同的Co/MnS纳米颗粒(NPs)。在552℃下对硫脲进行了煅烧,制备了S-g-C3N4 (SCN)纳米片。将最佳掺杂的NPs与S-g-C3N4结合,形成一系列纳米复合材料(10%,30%,50%,70%和90%)。材料带隙(Eg)值通过tac图确定。用紫外-可见分光光度计对MB染料进行了光降解。据我们所知,硫掺杂石墨氮化碳(S-g-C₃N₄)首次与钴和硫化锰纳米颗粒结合使用,以协同增强可见光光催化活性,从而有效降解有毒有机染料亚甲基蓝。除了光催化处理外,抑菌结果表明(Co /MnS/ S-g-C₃N₄)在钴元素、MnS和S-g-C₃N₄之间具有协同作用,能有效地杀灭细菌。结果表明,在MnS晶格中掺杂6%的钴可以增强光催化氧化/还原。在6% Co/MnS@10% SCN纳米复合材料中观察到最高的光降解性能,这归因于改善的电荷分离和减少的电荷重组。合成的纳米催化剂在经过3次循环后仍保持显著的降解率。采用XRD和FTIR分析了纯MnS、6% Co/MnS、S-g-C3N4和6% Co/ mnns @ 10% SCN纳米复合材料的结构形态。对制备的纳米材料进行了动力学研究,以确定其速率常数。研究了最佳光催化剂对枯草芽孢杆菌和大肠杆菌的抑菌性能。结果表明,复合合成和掺杂增强了MnS的抑菌活性,其抑菌活性趋势为:MnS <;6% Co/MnS <;6% Co/MnS@10% SCN。图形抽象
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引用次数: 0
Ultra-facile synthesis of CuO nanoclusters with excellent antibacterial activity and their antimicrobial mechanism study 具有优异抗菌活性的氧化铜纳米团簇的超简便合成及其抗菌机理研究
IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Pub Date : 2024-10-22 DOI: 10.1007/s10971-024-06569-5
Guoqiang Yang, Ye Hong, Yimei Wang, Xuechao Shi, Shuxian Hou, Xinxin Liu, Yuxuan Wang, Fei Ge, Jun Wang

It is well known that bacterial infections pose a great threat to human health and life, and the situation has intensified because of the emergence of drug-resistant bacteria, especially in the medical field, the number of deaths due to super-bacteria infections that result from antibiotic misuse continues to increase every year. Researchers have been working hard and trying to find a suitable method to fight against bacterial infections, however, there is still no effective method to fight drug-resistant bacterial infections. In this study, an ultra-facile strategy was built to synthesize Copper Oxide Nanoclusters (CuO NCs), that exhibited broad-spectrum bactericidal activity against common pathogenic Gram-positive and Gram-negative bacteria. The synthesized CuO NCs exhibited a cluster structure with good stability and biocompatibility. The antibacterial mechanism revealed that the synthesized CuO NCs can cause bacterial death in multiple ways, including disrupting the bacterial cell membrane and ablating the biofilm, inducing the generation of ROS, and leading to nucleic acid leakage of bacteria. CuO NCs are simple to synthesize, have strong antibacterial activity, and are expected to open new avenues of antibacterial activity in the severe antibiotic environment due to the combination of antibacterial mechanisms that make it difficult for bacteria to develop drug resistance quickly.

Graphical Abstract

In this study, we designed and synthesized copper oxide nanoclusters (CuO NCs) with favorable biosafety and stability for combating bacterial infection problems. The material possesses several advantages that including: (1) CuO NCs are synthesized in a straightforward and expeditious method. (2) CuO NCs have been demonstrated to possess good biocompatibility. (3) The synthesized CuO NCs exhibit broad-spectrum antimicrobial activity against E. coli and S. aureus, as well as for their drug-resistant strains. (4) The synthesized CuO NCs are capable of effectively removing biofilms formed by bacteria and promoting ROS generation, which disrupts the bacterial cell membrane, induces nucleic acid leakage, and ultimately cause the death of bacteria. This study employing an efficient strategy to synthesize CuO NCs with excellent broad-spectrum anti-bacterial ability, offering a promising method for addressing the growing challenge of multi-drug resistant bacteria.

众所周知,细菌感染对人类健康和生命构成极大威胁,由于耐药细菌的出现,这种情况更加严重,特别是在医疗领域,由于滥用抗生素导致的超级细菌感染造成的死亡人数每年都在增加。研究人员一直在努力寻找一种合适的方法来对抗细菌感染,然而,仍然没有有效的方法来对抗耐药细菌感染。在这项研究中,建立了一种超简单的策略来合成氧化铜纳米簇(CuO NCs),该纳米簇对常见的致病性革兰氏阳性和革兰氏阴性细菌具有广谱杀菌活性。合成的纳米CuO具有良好的簇状结构,具有良好的稳定性和生物相容性。抑菌机制揭示,合成的CuO NCs可通过破坏细菌细胞膜和吞噬生物膜、诱导ROS生成、导致细菌核酸泄漏等多种途径导致细菌死亡。CuO NCs合成简单,抑菌活性强,结合多种抑菌机制使细菌难以快速产生耐药性,有望在严峻的抗生素环境中开辟抑菌活性的新途径。在本研究中,我们设计并合成了具有良好生物安全性和稳定性的氧化铜纳米团簇(CuO NCs),用于对抗细菌感染问题。该材料具有以下优点:(1)合成CuO纳米碳化物的方法简单、快捷。(2) CuO NCs具有良好的生物相容性。(3)合成的CuO NCs对大肠杆菌和金黄色葡萄球菌及其耐药菌株具有广谱抗菌活性。(4)合成的CuO NCs能够有效去除细菌形成的生物膜,促进ROS生成,破坏细菌细胞膜,诱发核酸渗漏,最终导致细菌死亡。本研究采用一种高效的策略合成了具有优异广谱抗菌能力的CuO NCs,为解决多重耐药菌日益增长的挑战提供了一种有希望的方法。
{"title":"Ultra-facile synthesis of CuO nanoclusters with excellent antibacterial activity and their antimicrobial mechanism study","authors":"Guoqiang Yang,&nbsp;Ye Hong,&nbsp;Yimei Wang,&nbsp;Xuechao Shi,&nbsp;Shuxian Hou,&nbsp;Xinxin Liu,&nbsp;Yuxuan Wang,&nbsp;Fei Ge,&nbsp;Jun Wang","doi":"10.1007/s10971-024-06569-5","DOIUrl":"10.1007/s10971-024-06569-5","url":null,"abstract":"<div><p>It is well known that bacterial infections pose a great threat to human health and life, and the situation has intensified because of the emergence of drug-resistant bacteria, especially in the medical field, the number of deaths due to super-bacteria infections that result from antibiotic misuse continues to increase every year. Researchers have been working hard and trying to find a suitable method to fight against bacterial infections, however, there is still no effective method to fight drug-resistant bacterial infections. In this study, an ultra-facile strategy was built to synthesize Copper Oxide Nanoclusters (CuO NCs), that exhibited broad-spectrum bactericidal activity against common pathogenic Gram-positive and Gram-negative bacteria. The synthesized CuO NCs exhibited a cluster structure with good stability and biocompatibility. The antibacterial mechanism revealed that the synthesized CuO NCs can cause bacterial death in multiple ways, including disrupting the bacterial cell membrane and ablating the biofilm, inducing the generation of ROS, and leading to nucleic acid leakage of bacteria. CuO NCs are simple to synthesize, have strong antibacterial activity, and are expected to open new avenues of antibacterial activity in the severe antibiotic environment due to the combination of antibacterial mechanisms that make it difficult for bacteria to develop drug resistance quickly.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>In this study, we designed and synthesized copper oxide nanoclusters (CuO NCs) with favorable biosafety and stability for combating bacterial infection problems. The material possesses several advantages that including: (1) CuO NCs are synthesized in a straightforward and expeditious method. (2) CuO NCs have been demonstrated to possess good biocompatibility. (3) The synthesized CuO NCs exhibit broad-spectrum antimicrobial activity against <i>E. coli</i> and <i>S. aureus</i>, as well as for their drug-resistant strains. (4) The synthesized CuO NCs are capable of effectively removing biofilms formed by bacteria and promoting ROS generation, which disrupts the bacterial cell membrane, induces nucleic acid leakage, and ultimately cause the death of bacteria. This study employing an efficient strategy to synthesize CuO NCs with excellent broad-spectrum anti-bacterial ability, offering a promising method for addressing the growing challenge of multi-drug resistant bacteria.</p></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 1","pages":"132 - 144"},"PeriodicalIF":2.3,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Investigation of Sn1-xCoxS nanocomposites as a catalyst for hydrogen production from sodium borohydride methanolysis Sn1-xCoxS纳米复合材料作为硼氢化钠甲醇解制氢催化剂的研究
IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Pub Date : 2024-10-21 DOI: 10.1007/s10971-024-06596-2
Zein K. Heiba, Ah Abd Ellatief, Mohamed Bakr Mohamed, A. M. El-naggar, Hassan Elshimy

Samples of Sn1-xCoxS (x = 0, 0.025, 0.075, 0.1) were synthesized via the thermal evaporation approach under N2 gas. The phase characterization of the synthesized samples was conducted employing HighScore plus software. The quantitative assessment of the resulting phases and their structure and microstructure parameters were determined using Rietveld refinement methodology. The SEM images validated the formation of two-dimensional sheets firmly stacked in building blocks, and the corresponding EDS analysis substantiated the incorporation of Co ions in the samples. FTIR and Raman spectroscopic techniques were utilized to corroborate the established phases, chemical composition and the inclusion of Co within the samples. The impact of doping on the absorption and reflectance features of Sn1-xCoxS samples was investigated. The substantial absorption that forms a plateau in the visible range suggests that all samples possess the capability for effective utilization of visible light. In the UV and visible regions, the sample with x = 0.025 revealed the highest absorbance, while in the IR region, the sample with x = 0.1 displayed the peak absorbance value. The lowest optical band gap energy values (1.15 and 3.38 eV) were obtained at x = 0.075. The influence of nano Sn1-xCoxS samples on the rate of hydrogen generation through the utilization of sodium borohydride (NaBH4) is explored. Sample containing 10% Co exhibits the highest generation rate at 59382 mL min−1g−1.

Graphical Abstract

采用氮气热蒸发法制备了Sn1-xCoxS (x = 0、0.025、0.075、0.1)样品。采用HighScore plus软件对合成样品进行物相表征。采用Rietveld精化方法对所得相及其组织和显微组织参数进行定量评价。SEM图像证实了二维薄片牢固地堆叠在建筑块中的形成,相应的EDS分析证实了样品中Co离子的掺入。利用FTIR和拉曼光谱技术证实了样品中确定的相、化学成分和Co的包合。研究了掺杂对Sn1-xCoxS样品吸收和反射特性的影响。在可见光范围内形成平台的大量吸收表明所有样品都具有有效利用可见光的能力。在紫外区和可见光区,x = 0.025的样品吸光度最高,而在红外区,x = 0.1的样品吸光度最高。在x = 0.075处获得了最低的光学带隙能值(1.15和3.38 eV)。探讨了纳米Sn1-xCoxS样品对硼氢化钠(NaBH4)产氢速率的影响。含有10% Co的样品在59382 mL min - 1g - 1时显示出最高的生成率。图形抽象
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引用次数: 0
Enhancing glass surface hydrophobicity: the role of Perfluorooctyltriethoxysilane in advanced surface modification 增强玻璃表面的疏水性:全氟辛基三乙氧基硅烷在高级表面改性中的作用
IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Pub Date : 2024-10-19 DOI: 10.1007/s10971-024-06593-5
Hossein Khojasteh, Mohammad-Peyman Mazhari, Kamran Heydaryan, Peyman Aspoukeh, Shahab Ahmadiazar, Samir Mustafa Hamad, Dilshad Shaikhah

This study presents a novel approach to fabricate self-cleaning, superhydrophobic coatings on glass surfaces and photovoltaic cells. Using a cost-effective spray-coating technique, superhydrophobic glass surfaces were developed incorporating modified SiO2 nanoparticles (NPs), synthesized via a simple sol–gel method. Silylating agents, Poly(dimethylsiloxane) (PDMS) and Perfluorooctyltriethoxysilane (PFOS), were used for the modification, resulting in enhanced surface roughness and hydrophobicity. The study extensively characterizes the analytical techniques such as Fourier transform infrared spectroscopy (FT-IR), atomic force microscopy (AFM), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and contact angle measurements. Modified NPs with PFOS showed a significant improvement in hydrophobic properties, with water contact angles of 144.73° and sliding angles of 5°. The stability of these surfaces under various pH conditions was also evaluated. This research contributes valuable insights into the development of self-cleaning coatings for glass and photovoltaic cells, demonstrating the potential of superhydrophobic surfaces in practical applications.

Graphical Abstract

本研究提出了一种在玻璃表面和光伏电池上制造自清洁超疏水涂层的新方法。该研究采用一种经济高效的喷涂技术,在超疏水玻璃表面加入了通过简单的溶胶-凝胶法合成的改性二氧化硅纳米颗粒(NPs)。硅烷化剂聚(二甲基硅氧烷)(PDMS)和全氟辛基三乙氧基硅烷(PFOS)被用于改性,从而提高了表面粗糙度和疏水性。研究广泛采用了傅立叶变换红外光谱(FT-IR)、原子力显微镜(AFM)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)和接触角测量等分析技术。用全氟辛烷磺酸修饰的 NPs 在疏水性能方面有显著改善,水接触角为 144.73°,滑动角为 5°。此外,还评估了这些表面在不同 pH 值条件下的稳定性。这项研究为玻璃和光伏电池自清洁涂层的开发提供了宝贵的见解,展示了超疏水表面在实际应用中的潜力。
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引用次数: 0
Correction to: Plastic deformation and heat-enabled structural recovery of monolithic silica aerogels 更正为整体二氧化硅气凝胶的塑性变形和受热结构恢复
IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Pub Date : 2024-10-19 DOI: 10.1007/s10971-024-06574-8
Julien Gonthier, Ernesto Scoppola, Peter Werner, Aleksander Gurlo, Peter Fratzl, Wolfgang Wagermaier
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引用次数: 0
Role of chelating agents on the sol-gel synthesis of bismuth ferrite nanoparticles 螯合剂对溶胶-凝胶法合成铁铋纳米粒子的作用
IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Pub Date : 2024-10-16 DOI: 10.1007/s10971-024-06588-2
Kokkiligadda Jhansi, Parasuraman Swaminathan

Bismuth ferrite (BiFeO3) possesses multifunctional properties pertaining to its unique crystal structure. This study presents a comprehensive investigation on the role of different chelating agents on the low temperature, sol-gel synthesis of bismuth ferrite (BFO) nanoparticles (NPs). The sol-gel process utilizes precursors (iron nitrate and bismuth nitrate), solvent (ethylene glycol), catalyst (nitric acid), and the chelating agent. In this work, different chelating agents, such as acetic acid (AA), citric acid (CA), ethylenediaminetetraacetic acid (EDTA), glycine (GLY), tartaric acid (TA), and urea are evaluated for their influence on the phase purity and morphological features of the synthesized BFO. The NPs are characterized using various techniques such as x-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area analysis, UV-Vis-NIR spectroscopy, and vibrating sample magnetometry (VSM). Among all the chelating agents, TA is found to be the most suitable candidate for BFO synthesis. Pure BFO NPs of average crystallite size 20.8 nm, 24.8 m2/g surface area, and 1.91 eV optical bandgap are obtained after the calcination of the BFO-TA gel. The results are attributed to the easy gelation capability of TA due to the formation of a well-organized heterometallic polynuclear network during the gelation process. High magnetic saturation of 6.72 emu/g and squareness ratio of 0.26 of BFO-TA NPs implies a weak ferromagnetic nature. These results demonstrate a promising route to synthesize pure BFO, which given its multiferroic nature can be used for many applications.

Graphical Abstract

铁氧体铋(BiFeO3)因其独特的晶体结构而具有多功能特性。本研究全面探讨了不同螯合剂对低温溶胶-凝胶法合成铁铋纳米粒子(BFO)的作用。溶胶-凝胶法利用前驱体(硝酸铁和硝酸铋)、溶剂(乙二醇)、催化剂(硝酸)和螯合剂。本研究评估了不同螯合剂(如醋酸(AA)、柠檬酸(CA)、乙二胺四乙酸(EDTA)、甘氨酸(GLY)、酒石酸(TA)和尿素)对合成 BFO 的相纯度和形态特征的影响。采用多种技术对 NPs 进行了表征,如 X 射线衍射(XRD)、扫描电子显微镜(SEM)、Brunauer-Emmett-Teller(BET)表面积分析、紫外-可见-近红外光谱和振动样品磁力计(VSM)。在所有螯合剂中,TA 是最适合合成 BFO 的螯合剂。在煅烧 BFO-TA 凝胶后,得到了平均结晶尺寸为 20.8 nm、表面积为 24.8 m2/g 和光带隙为 1.91 eV 的纯 BFO NPs。这些结果归因于在凝胶化过程中形成了组织良好的异金属多核网络,从而使 TA 易于凝胶化。BFO-TA NPs 的磁饱和度高达 6.72 emu/g,方差比为 0.26,这意味着其具有弱铁磁性。这些结果表明合成纯 BFO 的路线大有可为,而 BFO 的多铁性可用于多种应用。
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引用次数: 0
Structural, electrical, and thermal properties of Ba-substituted B(Pb)SCCO superconductors prepared by sol-gel method 溶胶-凝胶法制备的钡取代B(Pb)SCCO超导体的结构、电学和热学特性
IF 2.3 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Pub Date : 2024-10-16 DOI: 10.1007/s10971-024-06568-6
Firas Salim Abed, Lamia K. Abbas

In this study, some physical properties of BSCCO superconductors have been investigated. The effects of Ba substitution in Bi1.7Pb0.3Sr2-yBayCa2Cu3O10+δ superconductor synthesized by the sol-gel method on the structural, thermal, and superconducting properties were identified. X-ray diffraction patterns display the dominant Bi-2223 high-temperature phase (HTP) mixed with the Bi-2212 low-temperature phase (LTP) in all samples. Variations in lattice parameters (a, b and c) significantly affect sample properties such as lattice volume, c/a ratio, and molecular weight (w). The highest percentage of HTP% appeared at y = 0.1 Ba content. Transmission Electron Microscopy (TEM) displays the formation of rod-like structures with nanoscale lengths. The Ba substitution ratio significantly determines the lattice dimension and oxygen content, affecting the prepared superconductor’s transition temperature (Tc). Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) show the changes in mass loss and shifting in decomposition temperatures correlated with the Ba substitution rate. The optimal ratio of Ba was at y = 0.1, which exhibits the highest HTP percentage of 73.07% and the highest Tc of 113.5 K, suggesting improved superconducting properties.

Graphical Abstract

本研究对 BSCCO 超导材料的一些物理性质进行了研究。确定了溶胶-凝胶法合成的 Bi1.7Pb0.3Sr2-yBayCa2Cu3O10+δ 超导材料中 Ba 取代对结构、热和超导特性的影响。X 射线衍射图样显示,在所有样品中,Bi-2223 高温相(HTP)与 Bi-2212 低温相(LTP)混合占主导地位。晶格参数(a、b 和 c)的变化会显著影响样品的特性,如晶格体积、c/a 比和分子量(w)。当钡含量为 y = 0.1 时,HTP 百分比最高。透射电子显微镜(TEM)显示形成了具有纳米级长度的棒状结构。钡的替代率在很大程度上决定了晶格尺寸和氧含量,从而影响制备的超导体的转变温度(Tc)。热重分析(TGA)和差热分析(DTA)表明,质量损失的变化和分解温度的变化与钡的取代率有关。钡的最佳比例为 y = 0.1,表现出最高的 HTP 百分比(73.07%)和最高的 Tc(113.5 K),表明超导特性得到了改善。
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Journal of Sol-Gel Science and Technology
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