In this study, Ni-doped ZnO (NZ) and Ni–Mn dual-doped ZnO (NMZ) NPs were synthesized by hydrothermal method. Various analytical techniques, such as XRD, UV–vis, FTIR, PL, SEM, EDAX, and HR-TEM, were employed to investigate the effect of doping transition metal ions in the ZnO lattice. The powder X-ray diffraction (XRD) patterns confirmed a hexagonal structure with average crystallite sizes of 30.66 nm and 27.09 nm for NZ and NMZ nanoparticles, respectively. Tauc’s plot showed that the energy bandgap was redshifted to 2.9 from 2.8 eV by doping transition metal ions in ZnO. The photoluminescence spectrum displayed various peaks, indicating the emission behaviour of the nanomaterials. The photocatalytic performance of the catalysts was tested under visible light sources against Crystal Violet (CV) dye. The degradation efficiency, for NMZ achieved a maximum degradation efficiency of 91.1 %. Antibacterial activity was evaluated against gram-positive (B. subtilis and S. aureus) and gram-negative (E. coli and P. aeruginosa) bacteria. The NMZ exhibited higher photocatalytic and antibacterial activity than NZ.
{"title":"Hydrothermally synthesized transition metal doped ZnO nanorods for dye degradation and antibacterial activity","authors":"Sulthana Sabura Sarbudeen, Jesurani Sinnappan, Jegatha Christy Arulanandam","doi":"10.1515/zpch-2024-0802","DOIUrl":"https://doi.org/10.1515/zpch-2024-0802","url":null,"abstract":"\u0000 In this study, Ni-doped ZnO (NZ) and Ni–Mn dual-doped ZnO (NMZ) NPs were synthesized by hydrothermal method. Various analytical techniques, such as XRD, UV–vis, FTIR, PL, SEM, EDAX, and HR-TEM, were employed to investigate the effect of doping transition metal ions in the ZnO lattice. The powder X-ray diffraction (XRD) patterns confirmed a hexagonal structure with average crystallite sizes of 30.66 nm and 27.09 nm for NZ and NMZ nanoparticles, respectively. Tauc’s plot showed that the energy bandgap was redshifted to 2.9 from 2.8 eV by doping transition metal ions in ZnO. The photoluminescence spectrum displayed various peaks, indicating the emission behaviour of the nanomaterials. The photocatalytic performance of the catalysts was tested under visible light sources against Crystal Violet (CV) dye. The degradation efficiency, for NMZ achieved a maximum degradation efficiency of 91.1 %. Antibacterial activity was evaluated against gram-positive (B. subtilis and S. aureus) and gram-negative (E. coli and P. aeruginosa) bacteria. The NMZ exhibited higher photocatalytic and antibacterial activity than NZ.","PeriodicalId":506520,"journal":{"name":"Zeitschrift für Physikalische Chemie","volume":"9 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141804371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fahim Ullah, Adnan Khan, Kashif Gul, Abdullah M. Asiri, T. Kamal, Nauman Ali
Water contamination by toxic organic dyes represents a significant global challenge necessitating effective remediation strategies. Due to their high catalytic activity, considerable attention has been gained to metal-based nanocatalysts. Cellulose acetate sheets supported by gold nanoparticles through a reduction method were synthesized. The composite synthesized material presents a compelling platform for catalytic reduction in the remediation of toxic organic pollutants, ensuring controlled particle size and stability. In this study, the prepared cellulose acetate sheet (CAsheet) was dipped in a 0.001 M aqueous chloroauric acid (HAuCl4) solution and reduced by immersion in a 0.1 M sodium borohydride (NaBH4) aqueous solution. After the successful preparation of virgin cellulose acetate sheet (CAsheet) and gold-supported cellulose acetate sheet (Au-CAsheet) samples were assessed by scanning electron microscopy (SEM), X-ray crystallography (XRD), energy dispersive X-rays spectroscopy (EDX), and Fourier transform infrared spectroscopy (FTIR) analysis. The catalytic reduction reaction of toxic compounds i.e. reduction of 4-nitroaniline (4-NA), Congo red (CR), and reactive yellow (RY-42) by using NaBH4. The catalytic activity of the Au-CAsheet was exhibited by the reaction rate constant (k app) values 0.3189, 0.1596, and 0.1593 min−1 for CR, 4-NA, and RY-42 respectively. This kind of procedure for Au-CAsheet synthesis may be valid for different applications in catalysis, sensing, and environmental application.
有毒有机染料造成的水污染是一项重大的全球性挑战，必须采取有效的补救策略。由于金属基纳米催化剂具有很高的催化活性，因此备受关注。通过还原法合成了由金纳米颗粒支撑的醋酸纤维素片。这种复合合成材料为有毒有机污染物的修复提供了一个催化还原的平台，并确保了颗粒大小和稳定性的可控性。在这项研究中，将制备好的醋酸纤维素薄片（CAsheet）浸入 0.001 M 氯尿酸（HAuCl4）水溶液中，然后浸入 0.1 M 硼氢化钠（NaBH4）水溶液中进行还原。在成功制备出原始醋酸纤维素薄片（CAsheet）和金支撑醋酸纤维素薄片（Au-CAsheet）后，对样品进行了扫描电子显微镜（SEM）、X 射线晶体学（XRD）、能量色散 X 射线光谱（EDX）和傅立叶变换红外光谱（FTIR）分析评估。利用 NaBH4 催化有毒化合物的还原反应，即还原 4-硝基苯胺（4-NA）、刚果红（CR）和活性黄（RY-42）。Au-CAsheet 的催化活性表现在对 CR、4-NA 和 RY-42 的反应速率常数（k app）分别为 0.3189、0.1596 和 0.1593 min-1。这种合成 Au-CAsheet 的方法可用于催化、传感和环境应用等不同领域。
{"title":"Cellulose acetate sheet supported gold nanoparticles for the catalytic reduction of toxic organic pollutants","authors":"Fahim Ullah, Adnan Khan, Kashif Gul, Abdullah M. Asiri, T. Kamal, Nauman Ali","doi":"10.1515/zpch-2023-0420","DOIUrl":"https://doi.org/10.1515/zpch-2023-0420","url":null,"abstract":"\u0000 Water contamination by toxic organic dyes represents a significant global challenge necessitating effective remediation strategies. Due to their high catalytic activity, considerable attention has been gained to metal-based nanocatalysts. Cellulose acetate sheets supported by gold nanoparticles through a reduction method were synthesized. The composite synthesized material presents a compelling platform for catalytic reduction in the remediation of toxic organic pollutants, ensuring controlled particle size and stability. In this study, the prepared cellulose acetate sheet (CAsheet) was dipped in a 0.001 M aqueous chloroauric acid (HAuCl4) solution and reduced by immersion in a 0.1 M sodium borohydride (NaBH4) aqueous solution. After the successful preparation of virgin cellulose acetate sheet (CAsheet) and gold-supported cellulose acetate sheet (Au-CAsheet) samples were assessed by scanning electron microscopy (SEM), X-ray crystallography (XRD), energy dispersive X-rays spectroscopy (EDX), and Fourier transform infrared spectroscopy (FTIR) analysis. The catalytic reduction reaction of toxic compounds i.e. reduction of 4-nitroaniline (4-NA), Congo red (CR), and reactive yellow (RY-42) by using NaBH4. The catalytic activity of the Au-CAsheet was exhibited by the reaction rate constant (k\u0000 app) values 0.3189, 0.1596, and 0.1593 min−1 for CR, 4-NA, and RY-42 respectively. This kind of procedure for Au-CAsheet synthesis may be valid for different applications in catalysis, sensing, and environmental application.","PeriodicalId":506520,"journal":{"name":"Zeitschrift für Physikalische Chemie","volume":"94 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141808123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hybrid perovskite materials, known for their potential in cost-effective optoelectronic applications, face a knowledge gap in crucial areas, particularly the atomic-level properties of the surface. This study addresses this challenge by refining ab initio methods for characterizing surface structures of cubic methylammonium lead bromide and methylammonium tin bromide (MAMeBr3 with Me = Sn, Pb), avoiding superficial restrictions in atomic movement during geometry optimization. The resulting structures confirmed nearly random MA+ molecule alignment, comparable to real-world experimental conditions. Calculating surface energies for these structures with crystal orientations {100} and {110}, each with different terminations, provides valuable insights into structural properties. Using a carefully chosen thermodynamic reference state, mimicking experimental conditions enables a thermodynamic discussion and facilitates the modulation of the MeBr2 component’s chemical potential. This modulation, in turn, allows for the prediction of crystal morphologies, as illustrated by Wulff’s construction. This approach establishes a crucial link between theoretical predictions and experimental conditions, shedding light on the complexities of hybrid perovskite materials.
混合过氧化物材料因其在具有成本效益的光电应用中的潜力而闻名，但在一些关键领域，尤其是表面的原子级特性方面，还存在着知识空白。本研究针对这一挑战，改进了表征立方甲基溴化铅铵和甲基溴化锡铵（MAMeBr3，Me = Sn，Pb）表面结构的 ab initio 方法，避免了几何优化过程中对原子运动的表面限制。所得到的结构证实，MA+分子的排列几乎是随机的，与真实世界的实验条件相当。计算这些晶体取向为{100}和{110}的结构的表面能，为了解结构特性提供了宝贵的信息。利用精心选择的热力学参考状态，模拟实验条件进行热力学讨论，有助于调节 MeBr2 成分的化学势。这种调节反过来又可以预测晶体形态，如 Wulff 的构造所示。这种方法在理论预测和实验条件之间建立了重要联系，揭示了混合包晶材料的复杂性。
{"title":"Ab initio study of surfaces of lead and tin based metal halide perovskite structures","authors":"Henning Kuper, Becker Jörg August","doi":"10.1515/zpch-2024-0616","DOIUrl":"https://doi.org/10.1515/zpch-2024-0616","url":null,"abstract":"\u0000 Hybrid perovskite materials, known for their potential in cost-effective optoelectronic applications, face a knowledge gap in crucial areas, particularly the atomic-level properties of the surface. This study addresses this challenge by refining ab initio methods for characterizing surface structures of cubic methylammonium lead bromide and methylammonium tin bromide (MAMeBr3 with Me = Sn, Pb), avoiding superficial restrictions in atomic movement during geometry optimization. The resulting structures confirmed nearly random MA+ molecule alignment, comparable to real-world experimental conditions. Calculating surface energies for these structures with crystal orientations {100} and {110}, each with different terminations, provides valuable insights into structural properties. Using a carefully chosen thermodynamic reference state, mimicking experimental conditions enables a thermodynamic discussion and facilitates the modulation of the MeBr2 component’s chemical potential. This modulation, in turn, allows for the prediction of crystal morphologies, as illustrated by Wulff’s construction. This approach establishes a crucial link between theoretical predictions and experimental conditions, shedding light on the complexities of hybrid perovskite materials.","PeriodicalId":506520,"journal":{"name":"Zeitschrift für Physikalische Chemie","volume":"16 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141817129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. G. Prabitha, Jhelai Sahadevan, Esakki Muthu Sankaran, M. A. Bhat, Narayanan Girija Nisha, A. Viji, Ikhyun Kim
Remediating water contamination greatly benefits from the removal of chemical as well as microbiological contaminants using the same substance. Yttrium-doped Lanthanum Titanate (LaY x Ti1−x O3, where x = 0 (LTO) and 0.05 (LYTO)) nanoparticles (NPs) synthesized by the auto-combustion method were already proven to have better antibacterial activities. The current study aims to investigate the photocatalytic degradation efficiency of the same sample for the organic pollutant Methylene Blue (MB) dye. Here, two vital and decisive characterization methods were employed: Raman spectroscopy for chemical and morphological features and X-ray photoelectron spectroscopy (XPS) for surface phase identification. The oxidation states of La3+ and Ti3+ ions have been deduced using XPS. The HRTEM reveals the nano-structure with SAED pattern is supporting with XRD data. LaTiO3 (LTO) and LaY0.05Ti0.95O3 (LYTO) nanoparticles showed degradation efficiencies of 40.26 % and 86.24 %, respectively, at degrading methylene blue (MB) dye after a reaction time of 90 min. The degradation efficiency of LTO increased to 87.19 % after a reaction time of 150 min. The introduction of yttrium doping into lithium titanate demonstrates promise as a material for mitigating water treatment, as it augments the material’s antibacterial and photocatalytic characteristics.
{"title":"Influence of yttrium doping on the photocatalytic behaviour of lanthanum titanate: a material for water treatment","authors":"V. G. Prabitha, Jhelai Sahadevan, Esakki Muthu Sankaran, M. A. Bhat, Narayanan Girija Nisha, A. Viji, Ikhyun Kim","doi":"10.1515/zpch-2024-0779","DOIUrl":"https://doi.org/10.1515/zpch-2024-0779","url":null,"abstract":"\u0000 Remediating water contamination greatly benefits from the removal of chemical as well as microbiological contaminants using the same substance. Yttrium-doped Lanthanum Titanate (LaY\u0000 x\u0000 Ti1−x\u0000 O3, where x = 0 (LTO) and 0.05 (LYTO)) nanoparticles (NPs) synthesized by the auto-combustion method were already proven to have better antibacterial activities. The current study aims to investigate the photocatalytic degradation efficiency of the same sample for the organic pollutant Methylene Blue (MB) dye. Here, two vital and decisive characterization methods were employed: Raman spectroscopy for chemical and morphological features and X-ray photoelectron spectroscopy (XPS) for surface phase identification. The oxidation states of La3+ and Ti3+ ions have been deduced using XPS. The HRTEM reveals the nano-structure with SAED pattern is supporting with XRD data. LaTiO3 (LTO) and LaY0.05Ti0.95O3 (LYTO) nanoparticles showed degradation efficiencies of 40.26 % and 86.24 %, respectively, at degrading methylene blue (MB) dye after a reaction time of 90 min. The degradation efficiency of LTO increased to 87.19 % after a reaction time of 150 min. The introduction of yttrium doping into lithium titanate demonstrates promise as a material for mitigating water treatment, as it augments the material’s antibacterial and photocatalytic characteristics.","PeriodicalId":506520,"journal":{"name":"Zeitschrift für Physikalische Chemie","volume":"11 50","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141640522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Madhavan Natarajan, Sivaprakash Paramasivam, Ikhyun Kim, Martin Britto Dhas Sathiyadhas Amalapushpam
Imidazolium l-tartrate crystal has been grown by employing the slow evaporation technique using de-ionized water as the solvent. An impact study on the exposure of shock pulses on the surface of the material has been carried out and the influence of shock waves on its photo luminance has been investigated. In the present work, in order to carry out the experiment, a shock wave of Mach number 1.5 has been utilized which has been generated by a semi-automated Reddy Tube. Imidazolium tartrate crystal is made into a fine powder and split into four identical parts to be used for further characterization. A series of shock waves such as 25, 50, and 75 are impacted on the respective samples while keeping one of the samples as the control. The powder X-ray diffraction analysis reveals that the observed increase in peak intensity and peak shifting is due to the increase in the number of shock pulses from 25 to 75. FTIR is performed to analyze the presence of functional groups in the material before and after shock exposure. Photoluminescence measurements are also carried out for the pre- and post-shocked samples to determine the nature of optical emission with respect to various shock pulse counts. The above experimental analyzes confirm that the title sample undergoes a reversible photoluminescence shift induced by shock waves.
{"title":"Reversible photoluminescence shift in imidazolium l-tartrate crystal triggered by acoustic shock waves","authors":"Madhavan Natarajan, Sivaprakash Paramasivam, Ikhyun Kim, Martin Britto Dhas Sathiyadhas Amalapushpam","doi":"10.1515/zpch-2024-0624","DOIUrl":"https://doi.org/10.1515/zpch-2024-0624","url":null,"abstract":"\u0000 Imidazolium l-tartrate crystal has been grown by employing the slow evaporation technique using de-ionized water as the solvent. An impact study on the exposure of shock pulses on the surface of the material has been carried out and the influence of shock waves on its photo luminance has been investigated. In the present work, in order to carry out the experiment, a shock wave of Mach number 1.5 has been utilized which has been generated by a semi-automated Reddy Tube. Imidazolium tartrate crystal is made into a fine powder and split into four identical parts to be used for further characterization. A series of shock waves such as 25, 50, and 75 are impacted on the respective samples while keeping one of the samples as the control. The powder X-ray diffraction analysis reveals that the observed increase in peak intensity and peak shifting is due to the increase in the number of shock pulses from 25 to 75. FTIR is performed to analyze the presence of functional groups in the material before and after shock exposure. Photoluminescence measurements are also carried out for the pre- and post-shocked samples to determine the nature of optical emission with respect to various shock pulse counts. The above experimental analyzes confirm that the title sample undergoes a reversible photoluminescence shift induced by shock waves.","PeriodicalId":506520,"journal":{"name":"Zeitschrift für Physikalische Chemie","volume":"12 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141655788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. R. Kandavalli, Venkatesa Prabhu Sundramurthy, Vimala Devi Krishnasamy, Goli Naga Raja Prasad, U. Kasi, Sudhakar Rajesh, Balaganesh Rajesh Kumar, Mayakannan Selvaraju, S. Kadaikunnan, Jamal M Khaled
In recent years, hybrid natural fiber–reinforced composites prepared by bio-based epoxy resin (BBER) have gained extensive usage due to their exceptional specific strength. Researchers have looked at natural fibre/BBER composites because of the vast array of technical uses for these materials. Experimenting with various composition combinations of hybrid natural fiber composites to improve their mechanical properties requires a significant amount of resources. The purpose of this research was to develop and evaluate a tannic acid (TA) – based bio-based epoxy resin (BBER). The synthesized BBER was analyzed using FTIR spectroscopy. The bio-resin’s thermal characteristics were assessed using TGA, DSC, and OIT studies. Further, this study investigated the mechanical characteristics of hybrid composites prepared by Holoptelea integrifolia (HIBF) bark fibre reinforced with Ziziphus jujuba Seed Particles (ZJSP) which was manufactured using BBER. In the present study, a full factorial design was used to conduct experiments, which included three variables: the percentage of HIBF fibre by weight, the particle size of ZJSP, and the percentage of ZJSP by weight. The experimental results from the mechanical evaluation of the hybrid HIBF/ZJSP using BBER composites are then used to develop a fuzzy model that predicts mechanical parameters such as tensile strength (TS), flexural strength (FS), and impact strength (IS). An accurate prediction of the mechanical characteristics of hybridized composites made by the fuzzy model owing to the membership functions that were built. To further validate the fuzzy model, a set of tests utilising test cases were conducted. The model’s accuracy in predicting the mechanical characteristics of hybrid composites was determined to be 87 % based on the outcomes of the test cases.
{"title":"Bioresin based hybrid green composite preparation using Holoptelea integrifolia fibers reinforced by Ziziphus jujuba seed particles: a fuzzy logic assisted optimization of mechanical behaviour","authors":"S. R. Kandavalli, Venkatesa Prabhu Sundramurthy, Vimala Devi Krishnasamy, Goli Naga Raja Prasad, U. Kasi, Sudhakar Rajesh, Balaganesh Rajesh Kumar, Mayakannan Selvaraju, S. Kadaikunnan, Jamal M Khaled","doi":"10.1515/zpch-2024-0837","DOIUrl":"https://doi.org/10.1515/zpch-2024-0837","url":null,"abstract":"\u0000 In recent years, hybrid natural fiber–reinforced composites prepared by bio-based epoxy resin (BBER) have gained extensive usage due to their exceptional specific strength. Researchers have looked at natural fibre/BBER composites because of the vast array of technical uses for these materials. Experimenting with various composition combinations of hybrid natural fiber composites to improve their mechanical properties requires a significant amount of resources. The purpose of this research was to develop and evaluate a tannic acid (TA) – based bio-based epoxy resin (BBER). The synthesized BBER was analyzed using FTIR spectroscopy. The bio-resin’s thermal characteristics were assessed using TGA, DSC, and OIT studies. Further, this study investigated the mechanical characteristics of hybrid composites prepared by Holoptelea integrifolia (HIBF) bark fibre reinforced with Ziziphus jujuba Seed Particles (ZJSP) which was manufactured using BBER. In the present study, a full factorial design was used to conduct experiments, which included three variables: the percentage of HIBF fibre by weight, the particle size of ZJSP, and the percentage of ZJSP by weight. The experimental results from the mechanical evaluation of the hybrid HIBF/ZJSP using BBER composites are then used to develop a fuzzy model that predicts mechanical parameters such as tensile strength (TS), flexural strength (FS), and impact strength (IS). An accurate prediction of the mechanical characteristics of hybridized composites made by the fuzzy model owing to the membership functions that were built. To further validate the fuzzy model, a set of tests utilising test cases were conducted. The model’s accuracy in predicting the mechanical characteristics of hybrid composites was determined to be 87 % based on the outcomes of the test cases.","PeriodicalId":506520,"journal":{"name":"Zeitschrift für Physikalische Chemie","volume":"124 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141656837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract We demonstrate the enhancement in the optical nonlinearity of materials when incorporated within a Tamm plasmon cavity (TPC). This study quantitatively investigates the enhanced nonlinear optical effects exhibited by silver@graphite (Ag@C) core–shell nanostructures integrated within a Tamm plasmon cavity. The Ag@C core–shell nanostructures were synthesized by laser ablation. The transmittance characteristics of the TPC are well-matched with those of the simulated spectra. Nonlinear optical studies, conducted using the open aperture Z-scan technique, demonstrated reverse saturable absorption (RSA) behavior in the Tamm plasmon cavity structure, and a profound enhancement in nonlinear absorption compared to that of the bare material film was also observed. The optical limiting threshold value was found to be 2.5 J/cm2 which is indeed a better value when compared to the reported values. Computational simulations illustrated a significantly intensified electric field within the Tamm plasmon cavity, suggesting the creation of enhanced photonic states leading to increased light–matter interactions. These findings underscore the potential of Ag@C core–shell nanostructures within Tamm plasmon cavities for advancing nonlinear optical devices and applications.
摘要 我们证明了在塔姆等离子体腔（TPC）内集成材料的光学非线性增强效果。本研究定量研究了银@石墨（Ag@C）核壳纳米结构在塔姆等离子体腔内的增强非线性光学效应。Ag@C 核壳纳米结构是通过激光烧蚀合成的。TPC 的透射特性与模拟光谱非常匹配。利用开孔 Z 扫描技术进行的非线性光学研究表明，塔姆等离子体空腔结构中存在反向可饱和吸收（RSA）行为，与裸材料薄膜相比，非线性吸收也有显著增强。研究发现，光学极限阈值为 2.5 J/cm2，与报告值相比确实是一个更好的值。计算模拟显示，塔姆等离子腔内的电场明显增强，这表明产生了增强的光子态，从而增加了光与物质的相互作用。这些发现强调了塔姆等离子腔内的 Ag@C 核壳纳米结构在推动非线性光学器件和应用方面的潜力。
{"title":"Tamm plasmon-induced impressive optical nonlinearity of silver@graphite core–shell nanostructures","authors":"Hasana Jahan Elamkulavan, Chandrasekharan Keloth","doi":"10.1515/zpch-2024-0807","DOIUrl":"https://doi.org/10.1515/zpch-2024-0807","url":null,"abstract":"Abstract We demonstrate the enhancement in the optical nonlinearity of materials when incorporated within a Tamm plasmon cavity (TPC). This study quantitatively investigates the enhanced nonlinear optical effects exhibited by silver@graphite (Ag@C) core–shell nanostructures integrated within a Tamm plasmon cavity. The Ag@C core–shell nanostructures were synthesized by laser ablation. The transmittance characteristics of the TPC are well-matched with those of the simulated spectra. Nonlinear optical studies, conducted using the open aperture Z-scan technique, demonstrated reverse saturable absorption (RSA) behavior in the Tamm plasmon cavity structure, and a profound enhancement in nonlinear absorption compared to that of the bare material film was also observed. The optical limiting threshold value was found to be 2.5 J/cm2 which is indeed a better value when compared to the reported values. Computational simulations illustrated a significantly intensified electric field within the Tamm plasmon cavity, suggesting the creation of enhanced photonic states leading to increased light–matter interactions. These findings underscore the potential of Ag@C core–shell nanostructures within Tamm plasmon cavities for advancing nonlinear optical devices and applications.","PeriodicalId":506520,"journal":{"name":"Zeitschrift für Physikalische Chemie","volume":"115 44","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141667723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
O. Adedokun, Omonike Mary Adedokun, I. Bello, A. Ajani, P.R. Jubu, Mojoyinla Kofoworola Awodele, M. Dhlamini, Ashok Kumar Kaliamurthy, M. A. Bhat
Abstract In this study, lithium cobalt co-doped titanium oxide (Li:Co-TiO2) was reported via the sol–gel method in a one-pot synthesis approach and their potential applications were evaluated for the photodegradation of organic dye as photocatalysts. The structural and optical properties of the photocatalysts were respectively elucidated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and diffuse reflectance spectroscopy (DRS). The morphological and elemental composition of the Li:Co-TiO2 was established by high-resolution field-emission scanning electron microscopy (FESEM) coupled with EDX, which confirmed a successful preparation of the photocatalysts. The modification of TiO2 with Li:Co changes the optical properties of the pristine TiO2 with a reduction in the bandgap (3.26–2.8 eV) of the resultant photocatalysts. The photocatalytic activity of Li:Co-TiO2 composites was examined for their efficacy through the degradation of Methylene Blue (MB) dye. The photodegradation revealed an improved performance of Li:Co-TiO2 in the degradation of MB compared to pristine TiO2. The total amount of the degraded MB dye within the total time interval of the irradiation was recorded to be 72 % and 87 % for TiO2 and Li:Co co-doped TiO2 respectively. The enhanced results obtained from the photocatalytic activity of Li:Co-TiO2 to degrade MB, suggest that the composite is a potential candidate for environmental remediation and photocatalysis applications.
{"title":"Sol–gel synthesized lithium–cobalt co-doped titanium (IV) oxide nanocomposite as an efficient photocatalyst for environmental remediation","authors":"O. Adedokun, Omonike Mary Adedokun, I. Bello, A. Ajani, P.R. Jubu, Mojoyinla Kofoworola Awodele, M. Dhlamini, Ashok Kumar Kaliamurthy, M. A. Bhat","doi":"10.1515/zpch-2024-0835","DOIUrl":"https://doi.org/10.1515/zpch-2024-0835","url":null,"abstract":"Abstract In this study, lithium cobalt co-doped titanium oxide (Li:Co-TiO2) was reported via the sol–gel method in a one-pot synthesis approach and their potential applications were evaluated for the photodegradation of organic dye as photocatalysts. The structural and optical properties of the photocatalysts were respectively elucidated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and diffuse reflectance spectroscopy (DRS). The morphological and elemental composition of the Li:Co-TiO2 was established by high-resolution field-emission scanning electron microscopy (FESEM) coupled with EDX, which confirmed a successful preparation of the photocatalysts. The modification of TiO2 with Li:Co changes the optical properties of the pristine TiO2 with a reduction in the bandgap (3.26–2.8 eV) of the resultant photocatalysts. The photocatalytic activity of Li:Co-TiO2 composites was examined for their efficacy through the degradation of Methylene Blue (MB) dye. The photodegradation revealed an improved performance of Li:Co-TiO2 in the degradation of MB compared to pristine TiO2. The total amount of the degraded MB dye within the total time interval of the irradiation was recorded to be 72 % and 87 % for TiO2 and Li:Co co-doped TiO2 respectively. The enhanced results obtained from the photocatalytic activity of Li:Co-TiO2 to degrade MB, suggest that the composite is a potential candidate for environmental remediation and photocatalysis applications.","PeriodicalId":506520,"journal":{"name":"Zeitschrift für Physikalische Chemie","volume":"115 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141668206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abi Belvia Anthony Dass, Bharathi Bernadsha Singarayar, Senthil Subban
In this present work we report the impact of employing the neodymium (Nd) to influence the structure and morphology of ZnO. To discern the efficiency of Nd doped ZnO in DSSCs, its properties are investigated. Undoped ZnO and Nd doped ZnO were prepared by hydrothermal synthesis method. Structural and morphological studies of the obtained samples were collected through XRD and HR-TEM. The change in the bandgap is observed from UV analysis due to the introduction of Nd ions on the surface of ZnO. Comparing to undoped ZnO, Nd doped ZnO sample exhibits better results. Dye sensitized solar cells were fabricated using N719 dye, redox electrolyte and counter electrode (platinum). The efficiencies of undoped and doped DSSCs were calculated. After the fabrication and simulation of DSSCs, the outcomes and efficiencies of the undoped and neodymium doped ZnO solar cells were studied to choose the better anode to fabricate dye sensitized solar cells.
{"title":"Investigation of structural properties of Nd3+ doped ZnO to produce capable dye sensitized solar cells","authors":"Abi Belvia Anthony Dass, Bharathi Bernadsha Singarayar, Senthil Subban","doi":"10.1515/zpch-2023-0408","DOIUrl":"https://doi.org/10.1515/zpch-2023-0408","url":null,"abstract":"\u0000 In this present work we report the impact of employing the neodymium (Nd) to influence the structure and morphology of ZnO. To discern the efficiency of Nd doped ZnO in DSSCs, its properties are investigated. Undoped ZnO and Nd doped ZnO were prepared by hydrothermal synthesis method. Structural and morphological studies of the obtained samples were collected through XRD and HR-TEM. The change in the bandgap is observed from UV analysis due to the introduction of Nd ions on the surface of ZnO. Comparing to undoped ZnO, Nd doped ZnO sample exhibits better results. Dye sensitized solar cells were fabricated using N719 dye, redox electrolyte and counter electrode (platinum). The efficiencies of undoped and doped DSSCs were calculated. After the fabrication and simulation of DSSCs, the outcomes and efficiencies of the undoped and neodymium doped ZnO solar cells were studied to choose the better anode to fabricate dye sensitized solar cells.","PeriodicalId":506520,"journal":{"name":"Zeitschrift für Physikalische Chemie","volume":"57 48","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140970067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Prince Herald Milton, Sivasenthil Elangeeran, F. Husain, Shanmugam Vignesh, Viji Arangarajan
This study focuses on converting iron particles from grinding sludge, after removing impurities, into Fe-nanoparticles using high-energy ball billing. The goal is to examine the corrosion behaviors and mechanical properties of these Fe-nanoparticles. Nanostructured Fe-powder was synthesized through a process involving 10 h of high-energy ball milling, followed by conventional hot pressing and sintering. Structural and microstructural properties were thoroughly examined using techniques such as X-ray diffraction (XRD), optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and elemental diffraction spectroscopy. Upon sintering, SEM and TEM analyses unveiled the formation of a nanostructured alloy within the samples. Notably, the milled sample exhibited high hardness value, measuring at 155 HV. However, it is noteworthy that the un-milled sample demonstrated superior compression strength compared to its milled counterpart. Furthermore, the corrosion behavior of the samples was evaluated through electrochemical corrosion studies. Interestingly, the sample subjected to 10 h of milling (coin number 5) displayed a significantly lower corrosion rate, measuring at 1.3921 mm/year, suggesting enhanced corrosion resistance attributed to the nano structuring process.
{"title":"Investigation on electrochemical corrosion behavior and mechanical properties of Fe-nano particles produced by high-energy ball milling technique","authors":"Prince Herald Milton, Sivasenthil Elangeeran, F. Husain, Shanmugam Vignesh, Viji Arangarajan","doi":"10.1515/zpch-2023-0515","DOIUrl":"https://doi.org/10.1515/zpch-2023-0515","url":null,"abstract":"\u0000 This study focuses on converting iron particles from grinding sludge, after removing impurities, into Fe-nanoparticles using high-energy ball billing. The goal is to examine the corrosion behaviors and mechanical properties of these Fe-nanoparticles. Nanostructured Fe-powder was synthesized through a process involving 10 h of high-energy ball milling, followed by conventional hot pressing and sintering. Structural and microstructural properties were thoroughly examined using techniques such as X-ray diffraction (XRD), optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and elemental diffraction spectroscopy. Upon sintering, SEM and TEM analyses unveiled the formation of a nanostructured alloy within the samples. Notably, the milled sample exhibited high hardness value, measuring at 155 HV. However, it is noteworthy that the un-milled sample demonstrated superior compression strength compared to its milled counterpart. Furthermore, the corrosion behavior of the samples was evaluated through electrochemical corrosion studies. Interestingly, the sample subjected to 10 h of milling (coin number 5) displayed a significantly lower corrosion rate, measuring at 1.3921 mm/year, suggesting enhanced corrosion resistance attributed to the nano structuring process.","PeriodicalId":506520,"journal":{"name":"Zeitschrift für Physikalische Chemie","volume":"46 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140974820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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