Pub Date : 2024-10-25DOI: 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
{"title":"Sol-gel synthesis, characterizations of efficient Y3+ doped ZnO nanoparticles for photocatalytic dye degradation and energy storage applications","authors":"Asad ur Rehman Khan, Muhammad Ramzan, Sajawal ur Rehman Khan, Islem Abid, Faisal Saud Binhuday, Muhammad Abdul Majid, Abdul Rehman, Abhishek Singh","doi":"10.1007/s10971-024-06597-1","DOIUrl":"10.1007/s10971-024-06597-1","url":null,"abstract":"<div><p>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 Y<sup>3+</sup> doped ZnO nanoparticles can be potential candidates for industrial applications such as environmental remediation through photocatalysis, and energy storage devices like supercapacitors.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 1","pages":"180 - 196"},"PeriodicalIF":2.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941088","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}
Pub Date : 2024-10-25DOI: 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
{"title":"Synthesis and characterization of perovskite based rGO nanomaterial for energy storage application","authors":"Kashan Ali Geelani, F. F. Alharbi, Abdullah G. Al-Sehemi, A.M.A. Henaish","doi":"10.1007/s10971-024-06587-3","DOIUrl":"10.1007/s10971-024-06587-3","url":null,"abstract":"<div><p>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 MgCeO<sub>3</sub>/rGO nanocomposite material was fabricated using the hydrothermal method for the energy storage system. In this article, the physical behavior of the synthesized material MgCeO<sub>3</sub>/rGO composite were examined through physical as well as electrical properties by electrochemical techniques. In MgCeO<sub>3</sub>/rGO composite rGO enhanced the surface area due to redox activity increased. The electrochemical behavior of the MgCeO<sub>3</sub>/rGO nanocomposite sample had a specific capacitance (C<sub>s</sub>) value (1494.65 F g<sup>−1</sup>) at 1 A·g<sup>−1</sup>. Moreover, the fabricated electrode illustrated the best cycle stability after successive 5000th cycle Additionally, enhanced in electrochemical characteristics of prepared MgCeO<sub>3</sub>/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 MgCeO<sub>3</sub>/rGO composite, which can be used to fabricate the electrode material, can be used in diverse electrochemical applications as electrode material in storage mechanisms.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 1","pages":"169 - 179"},"PeriodicalIF":2.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941133","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}
Pub Date : 2024-10-24DOI: 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.
{"title":"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","authors":"Lobna Messeddek, Fatma Amraoui, Louiza Arab, Nouredine Sengouga","doi":"10.1007/s10971-024-06585-5","DOIUrl":"10.1007/s10971-024-06585-5","url":null,"abstract":"<div><p>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.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 1","pages":"159 - 168"},"PeriodicalIF":2.3,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941143","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}
Pub Date : 2024-10-23DOI: 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.
{"title":"Designing an eco-friendly Co/MnS/S-g-C3N4 nanocomposites: revolutionizing photocatalytic dye degradation and antibacterial efficiency","authors":"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","doi":"10.1007/s10971-024-06592-6","DOIUrl":"10.1007/s10971-024-06592-6","url":null,"abstract":"<div><p>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-C<sub>3</sub>N<sub>4</sub> (SCN) nanosheets. The optimal doped NPs were combined with S-g-C<sub>3</sub>N<sub>4</sub> 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-C<sub>3</sub>N<sub>4</sub>, 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.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 1","pages":"145 - 158"},"PeriodicalIF":2.3,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941219","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}
Pub Date : 2024-10-22DOI: 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.
{"title":"Ultra-facile synthesis of CuO nanoclusters with excellent antibacterial activity and their antimicrobial mechanism study","authors":"Guoqiang Yang, Ye Hong, Yimei Wang, Xuechao Shi, Shuxian Hou, Xinxin Liu, Yuxuan Wang, Fei Ge, 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}
Pub Date : 2024-10-21DOI: 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
{"title":"Investigation of Sn1-xCoxS nanocomposites as a catalyst for hydrogen production from sodium borohydride methanolysis","authors":"Zein K. Heiba, Ah Abd Ellatief, Mohamed Bakr Mohamed, A. M. El-naggar, Hassan Elshimy","doi":"10.1007/s10971-024-06596-2","DOIUrl":"10.1007/s10971-024-06596-2","url":null,"abstract":"<div><p>Samples of Sn<sub>1-x</sub>Co<sub>x</sub>S (x = 0, 0.025, 0.075, 0.1) were synthesized via the thermal evaporation approach under N<sub>2</sub> 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 Sn<sub>1-x</sub>Co<sub>x</sub>S 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 Sn<sub>1-x</sub>Co<sub>x</sub>S samples on the rate of hydrogen generation through the utilization of sodium borohydride (NaBH<sub>4</sub>) is explored. Sample containing 10% Co exhibits the highest generation rate at 59382 mL min<sup>−1</sup>g<sup>−1</sup>.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 1","pages":"123 - 131"},"PeriodicalIF":2.3,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941104","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}
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.
{"title":"Enhancing glass surface hydrophobicity: the role of Perfluorooctyltriethoxysilane in advanced surface modification","authors":"Hossein Khojasteh, Mohammad-Peyman Mazhari, Kamran Heydaryan, Peyman Aspoukeh, Shahab Ahmadiazar, Samir Mustafa Hamad, Dilshad Shaikhah","doi":"10.1007/s10971-024-06593-5","DOIUrl":"10.1007/s10971-024-06593-5","url":null,"abstract":"<div><p>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 SiO<sub>2</sub> 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.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 3","pages":"857 - 869"},"PeriodicalIF":2.3,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636677","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}
Pub Date : 2024-10-16DOI: 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.
{"title":"Role of chelating agents on the sol-gel synthesis of bismuth ferrite nanoparticles","authors":"Kokkiligadda Jhansi, Parasuraman Swaminathan","doi":"10.1007/s10971-024-06588-2","DOIUrl":"10.1007/s10971-024-06588-2","url":null,"abstract":"<div><p>Bismuth ferrite (BiFeO<sub>3</sub>) 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 m<sup>2</sup>/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.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 3","pages":"846 - 856"},"PeriodicalIF":2.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636911","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}
Pub Date : 2024-10-16DOI: 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。
{"title":"Structural, electrical, and thermal properties of Ba-substituted B(Pb)SCCO superconductors prepared by sol-gel method","authors":"Firas Salim Abed, Lamia K. Abbas","doi":"10.1007/s10971-024-06568-6","DOIUrl":"10.1007/s10971-024-06568-6","url":null,"abstract":"<div><p>In this study, some physical properties of BSCCO superconductors have been investigated. The effects of Ba substitution in Bi<sub>1.7</sub>Pb<sub>0.3</sub>Sr<sub>2-y</sub>Ba<sub>y</sub>Ca<sub>2</sub>Cu<sub>3</sub>O<sub>10+δ</sub> 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 (<i>a, b</i> and <i>c</i>) significantly affect sample properties such as lattice volume, <i>c/a</i> 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 <i>T</i><sub><i>c</i></sub> of 113.5 K, suggesting improved superconducting properties.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"112 3","pages":"837 - 845"},"PeriodicalIF":2.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636868","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}