Pradip D. Patil, R. Parlikar, M. V. Khedkar, A. V. Raut, K. M. Jadhav, R. Kavade
An effect of trivalent yttrium ion substitution on the structural properties of Co-Zn ferrite has been studied after the fabrication of Co1-xZnxFe2-yYyO4 nanoparticles at a typical concentration (x=0.3, y=0.2). The synthesis of Co1-xZnxFe2-yYyO4 nanoparticles was carried out via sol-gel auto-combustion technique using the citric acid as a fuel with a metal nitrate to citrate ratio of 1:3. X-ray diffraction studies of Co1-xZnxFe2-yYyO4 nanoparticles were carried out to study the structural parameter and phase purity. In this study, the XRD pattern revealed the presence of Bragg’s reflections belongs to the cubic spinel structure. The Y3+ ion doping creates additional phases in the Co-Zn ferrite, which plays a crucial role in controlling the physicochemical properties of the typical samples. The crystallite size (t) was estimated using Debye-Scherrer’s formula and reported to be decreased as a result of Y3+ ionic exchange as per the expectations. Y3+ ion substituted Co-Zn ferrite (with Y content = 0.02 per formula unit) may be considered for an attenuation application in the particular range. Visible range light was used for the photocatalytic degradation measurements using methylene Blue dye. In particular, an enhanced degradation efficiency of Co1-xZnxFe2-yYyO4 nanoparticles was observed. The UV-vis spectroscopic studies were performed and reported in the wavelength range 220 400 nm to check the absorbance of methylene blue dye at different time intervals.
{"title":"Sol-Gel synthesis, structural characterizations, photo- catalytic degradation for H2 production and UV-Absorption of yttrium-substituted Co-Zn ferrite nanoparticles","authors":"Pradip D. Patil, R. Parlikar, M. V. Khedkar, A. V. Raut, K. M. Jadhav, R. Kavade","doi":"10.1063/5.0061089","DOIUrl":"https://doi.org/10.1063/5.0061089","url":null,"abstract":"An effect of trivalent yttrium ion substitution on the structural properties of Co-Zn ferrite has been studied after the fabrication of Co1-xZnxFe2-yYyO4 nanoparticles at a typical concentration (x=0.3, y=0.2). The synthesis of Co1-xZnxFe2-yYyO4 nanoparticles was carried out via sol-gel auto-combustion technique using the citric acid as a fuel with a metal nitrate to citrate ratio of 1:3. X-ray diffraction studies of Co1-xZnxFe2-yYyO4 nanoparticles were carried out to study the structural parameter and phase purity. In this study, the XRD pattern revealed the presence of Bragg’s reflections belongs to the cubic spinel structure. The Y3+ ion doping creates additional phases in the Co-Zn ferrite, which plays a crucial role in controlling the physicochemical properties of the typical samples. The crystallite size (t) was estimated using Debye-Scherrer’s formula and reported to be decreased as a result of Y3+ ionic exchange as per the expectations. Y3+ ion substituted Co-Zn ferrite (with Y content = 0.02 per formula unit) may be considered for an attenuation application in the particular range. Visible range light was used for the photocatalytic degradation measurements using methylene Blue dye. In particular, an enhanced degradation efficiency of Co1-xZnxFe2-yYyO4 nanoparticles was observed. The UV-vis spectroscopic studies were performed and reported in the wavelength range 220 400 nm to check the absorbance of methylene blue dye at different time intervals.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"2013 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86473580","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. Bireddy, Venkata Ramana Reddy Chittireddy, L. Eppakayala
Using polyethylene glycol (PEG-600) as a reaction medium for the synthesis of 3, the green, onepot, multicomponent method was developed. Tandem-prepared compound 3 with excellent yields, without isolation of intermediates in situ. Thus, using PEG-600 as a solvent, novel Pyrazolo[5,1-c]thieno[3,4e][1,2,4]triazine-6-amine(3) products have been prepared with new synthetic routes and techniques.
{"title":"PEG-600: Greensolvent for synthesis of pyrazolo[5,1-c]thieno[3,4-e][1,2,4]triazin-6-amine","authors":"S. R. Bireddy, Venkata Ramana Reddy Chittireddy, L. Eppakayala","doi":"10.1063/5.0060858","DOIUrl":"https://doi.org/10.1063/5.0060858","url":null,"abstract":"Using polyethylene glycol (PEG-600) as a reaction medium for the synthesis of 3, the green, onepot, multicomponent method was developed. Tandem-prepared compound 3 with excellent yields, without isolation of intermediates in situ. Thus, using PEG-600 as a solvent, novel Pyrazolo[5,1-c]thieno[3,4e][1,2,4]triazine-6-amine(3) products have been prepared with new synthetic routes and techniques.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88538710","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}
Anatase TiO2 thin films were deposited on ITO coated glass substrates via hydrothermal assisted sol gel dip coating method and the change in their morphological and optical properties were observed as a function of annealing time and temperature. All the samples showed densely packed spherical or almost spherical nanoparticles that tended to become more irregular and agglomerated as annealing time and temperature were increased. This also led to decreased values of transmittance with increasing annealing time and temperature. Both refractive indices and extinction coefficient increased with increasing annealing time and temperature. Annealing at higher temperature and for longer time decreases non-stoichiometric lattice sites leading to less non-radiative recombination and higher PL intensity.
{"title":"Annealing time and temperature dependent morphological and optical properties of dip coated TiO2 thin films","authors":"S. Biswas, A. Kar","doi":"10.1063/5.0061273","DOIUrl":"https://doi.org/10.1063/5.0061273","url":null,"abstract":"Anatase TiO2 thin films were deposited on ITO coated glass substrates via hydrothermal assisted sol gel dip coating method and the change in their morphological and optical properties were observed as a function of annealing time and temperature. All the samples showed densely packed spherical or almost spherical nanoparticles that tended to become more irregular and agglomerated as annealing time and temperature were increased. This also led to decreased values of transmittance with increasing annealing time and temperature. Both refractive indices and extinction coefficient increased with increasing annealing time and temperature. Annealing at higher temperature and for longer time decreases non-stoichiometric lattice sites leading to less non-radiative recombination and higher PL intensity.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81260480","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}
Sushil Kumar, Parly, Riya, M. Saravanan, U. Deshpande, R. Venkatesh
Structural, morphological and Optoelectronic properties of Sb2Se3 film prepared by optimized screen-printing method is investigated and presented in this work. Sb2Se3 nanowires synthesized by microwave assisted solvothermal method along with ethylene glycol is used as the ink for the preparation of Sb2Se3screen printed film. Structural analysis confirms the orthorhombic phase while the energy dispersive spectroscopy confirms the formation of Sb2Se3 composition. Crystallite size of the nanocrystalline powder (film) is found to be 60nm (104nm). The surface morphological properties as investigated from field emission scanning electron microscope (FESEM) show that the film is covered with nanowires of length 1-3μm and diameter 100-200nm uniformly distributed over the substrate but agglomerated uniformly as a spherical particle with diameter of ~0.8μm.Interestingly, optoelectronic properties of the film and nanocrystalline powder show a band gap value of 1.19eV and 1.22eV respectively with an infinitesimal change in the band gap of the order of 0.03eV which is in correspondence with the morphological properties.Sb2Se3 being a potential material for solar cells, photodetectors and thermoelectric applications, this combination of fast and facile solvent-mediated microwave synthesis and screen-printing approach exhibits importance towards the wearable technology application for harvesting alternate electrical energy. INTRODUCTION V-VI group binary compounds are typical narrow band semiconductors and their nanostructures are of prime interest because of their dimensional-dependent properties [1]. Among these materials, antimony selenide (Sb2Se3) has gained great attention because of its potential technical applications in many areas including photoelectric, photoluminescence, thermoelectric and photon conducting devices. [1] Research on nanotechnology concerns the fabrication of nanomaterials and their applications in a variety of areas. From last few decades it has emerged as a fast-growing field as the properties of nanomaterials are quite different than to those of bulk materials. In particular, one dimensional nanostructure such as nanowires, nanorods and nanotubes have attracted considerable attention due to their potential use in optical, electronic, magnetic and mechanical devices [2]. Among these compounds, the direct band-gap semiconductor Sb2Se3 (Eg ≈ 1.11 to 1.8 eV), with an orthorhombic crystal structure and Pbnm space group, has been extensively studied as an important thermoelectric material and photoconductive semiconductor and because of its high thermoelectric power (~1800μV/K) and unique solar characteristics [3.] It can be used in thermoelectric applications, as absorber in solar cells memory switching devices, [4,5]. In the past decade, various chemical methods have been developed for the synthesis of Sb2Se3 and other chalcogenide nanomaterials, such as vapor-phase processing, the template-directed method, the solgel route, the microwa
本文研究了采用优化丝网印刷法制备的Sb2Se3薄膜的结构、形态和光电性能。采用微波辅助溶剂热法合成Sb2Se3纳米线,以乙二醇为油墨制备Sb2Se3丝网印刷薄膜。结构分析证实为正交相,能量色散谱分析证实为Sb2Se3组成。纳米晶粉末(膜)的晶粒尺寸为60nm (104nm)。通过场发射扫描电镜(FESEM)对薄膜表面形貌进行了研究,结果表明:薄膜表面覆盖着长度为1 ~ 3μm、直径为100 ~ 200nm的纳米线,这些纳米线均匀分布在衬底上,并均匀聚集成直径为~0.8μm的球形颗粒。有趣的是,薄膜和纳米晶粉末的光电性能分别显示出1.19eV和1.22eV的带隙值,带隙的微小变化约为0.03eV,这与形貌特性相一致。Sb2Se3是太阳能电池、光电探测器和热电应用的潜在材料,这种快速简便的溶剂介导的微波合成和丝网印刷方法的结合对可穿戴技术的应用具有重要意义,可用于收集替代电能。V-VI基团二元化合物是典型的窄带半导体,其纳米结构因其尺寸依赖性而备受关注。在这些材料中,硒化锑(Sb2Se3)由于其在光电、光致发光、热电和光子传导器件等许多领域的潜在技术应用而备受关注。[1]纳米技术的研究涉及纳米材料的制造及其在各个领域的应用。在过去的几十年里,由于纳米材料的性质与块状材料有很大的不同,它已经成为一个快速发展的领域。特别是一维纳米结构,如纳米线、纳米棒和纳米管,由于其在光学、电子、磁性和机械器件中的潜在应用而引起了人们的广泛关注。其中,直接带隙半导体Sb2Se3 (Eg≈1.11 ~ 1.8 eV)具有正交晶体结构和Pbnm空间基团,由于其高热电功率(~1800μV/K)和独特的太阳能特性,作为一种重要的热电材料和光导半导体得到了广泛的研究[3]。它可以用于热电应用,作为太阳能电池存储开关器件的吸收剂,[4,5]。在过去的十年中,各种化学方法被开发用于合成Sb2Se3和其他硫系纳米材料,如气相法、模板法、溶胶法、微波辅助化学浴法和水热/溶剂热合成。这些方法各有优缺点[3]。因此,开发一种快速、绿色、高产率的合成均匀sb2se3纳米线的方法仍然是非常需要的。本文通过一种可靠、简便的方法成功合成了Sb2Se3纳米结构。然而,据我们所知,以往的研究大多涉及高毒性还原剂,方案耗时长,产量低的特点。此外,Sb2Se3薄膜可以通过化学浴沉积(CBD)、气相传输沉积(VTD)、共蒸发等不同的沉积技术进行沉积。所有这些技术都是高成本的,并且涉及到一个漫长的制备过程,因此需要一种低成本和更短时间的技术。丝网印刷是一种成本低、效果快的印刷技术。采用丝网印刷、喷墨印刷、直接书写或其他逐层方法湿沉积纳米晶胶体油墨具有许多优点,因为它们能够直接将纳米晶油墨转化为微/宏观功能材料和器件,具有极大的可扩展性、灵活性和成本效益。如今,丝网印刷也被探索为一种更有效的制造热电器件的方法。采用丝网印刷法制备了该薄膜,并对其光电性能和结构性能进行了研究。本文还研究并报道了Sb2Se3纳米晶粉末和丝网印刷Sb2Se3薄膜的表面形貌。采用快速、简便的微波辅助溶剂热法合成了Sb2Se3纳米结构。Sb2Se3以纳米晶粉末形式合成如下:取SbCl (80mg),加入SeO2(60mg),再加入油胺(12ml),置于锥形烧瓶中磁力搅拌5小时。 然后,将溶液在“CEM”制造的“Discover”研究型微波炉中微波加热10分钟。溶液的颜色变成了黑色。加热后,将溶液冷却,用水和乙醇清洗数次。最后以干粉形式收集Sb2Se3沉淀。油墨的制备:将Sb2Se3纳米晶粉末溶液与SbCl3混合,SbCl3作为粘合剂与乙二醇(溶剂)混合,制备浆料。丝网印刷工艺:采用自制丝网印刷装置沉积薄膜,如图1所示。玻璃被用作薄膜制备的衬底。薄膜制备完成后,在1250C的常压下退火4小时,然后冷却干燥,使其正确粘附在玻璃基板上。薄膜干燥后,进行进一步的测量。图1所示。丝网印刷薄膜的整体制作过程示意图。利用Bruker D8 Advance x射线衍射仪进行XRD测量,确定合成样品的晶体结构。对Sb2Se3纳米晶粉末和膜的XRD谱图进行分析,如图1所示。纳米晶粉末XRD谱与JCPDS文件00015-0861匹配。从光谱上观察到Sb2Se3的晶体结构与Pbnm空间基团呈正交结构,其晶格参数为a =11.780Å b =11.633 Å c =3.985 Å。图2。(a)纳米晶线粉和(b)丝网印刷薄膜的Sb2Se3 XRD谱图。采用Debye - Scherrer公式计算Sb2Se3纳米晶粉的晶体尺寸:-
{"title":"Structural, morphological and optoelectronic properties of screen-printed film deposited using Sb2Se3 nanowires","authors":"Sushil Kumar, Parly, Riya, M. Saravanan, U. Deshpande, R. Venkatesh","doi":"10.1063/5.0060953","DOIUrl":"https://doi.org/10.1063/5.0060953","url":null,"abstract":"Structural, morphological and Optoelectronic properties of Sb2Se3 film prepared by optimized screen-printing method is investigated and presented in this work. Sb2Se3 nanowires synthesized by microwave assisted solvothermal method along with ethylene glycol is used as the ink for the preparation of Sb2Se3screen printed film. Structural analysis confirms the orthorhombic phase while the energy dispersive spectroscopy confirms the formation of Sb2Se3 composition. Crystallite size of the nanocrystalline powder (film) is found to be 60nm (104nm). The surface morphological properties as investigated from field emission scanning electron microscope (FESEM) show that the film is covered with nanowires of length 1-3μm and diameter 100-200nm uniformly distributed over the substrate but agglomerated uniformly as a spherical particle with diameter of ~0.8μm.Interestingly, optoelectronic properties of the film and nanocrystalline powder show a band gap value of 1.19eV and 1.22eV respectively with an infinitesimal change in the band gap of the order of 0.03eV which is in correspondence with the morphological properties.Sb2Se3 being a potential material for solar cells, photodetectors and thermoelectric applications, this combination of fast and facile solvent-mediated microwave synthesis and screen-printing approach exhibits importance towards the wearable technology application for harvesting alternate electrical energy. INTRODUCTION V-VI group binary compounds are typical narrow band semiconductors and their nanostructures are of prime interest because of their dimensional-dependent properties [1]. Among these materials, antimony selenide (Sb2Se3) has gained great attention because of its potential technical applications in many areas including photoelectric, photoluminescence, thermoelectric and photon conducting devices. [1] Research on nanotechnology concerns the fabrication of nanomaterials and their applications in a variety of areas. From last few decades it has emerged as a fast-growing field as the properties of nanomaterials are quite different than to those of bulk materials. In particular, one dimensional nanostructure such as nanowires, nanorods and nanotubes have attracted considerable attention due to their potential use in optical, electronic, magnetic and mechanical devices [2]. Among these compounds, the direct band-gap semiconductor Sb2Se3 (Eg ≈ 1.11 to 1.8 eV), with an orthorhombic crystal structure and Pbnm space group, has been extensively studied as an important thermoelectric material and photoconductive semiconductor and because of its high thermoelectric power (~1800μV/K) and unique solar characteristics [3.] It can be used in thermoelectric applications, as absorber in solar cells memory switching devices, [4,5]. In the past decade, various chemical methods have been developed for the synthesis of Sb2Se3 and other chalcogenide nanomaterials, such as vapor-phase processing, the template-directed method, the solgel route, the microwa","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"19 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91421041","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}
Nupur P. Vora, Priyank V. Kumar, S. Vyas, N. K. Bhatt, P. R. Vyas, V. Gohel
Transition metal alloys are valuable in material science research. In the present communication, Transition Metal Pseudopotential has been used to investigate lattice dynamics in symmetry and non-symmetry directions for binary alloy h ( = 0.6, 0.8). In absence of any neutron scattering data and theoretical results, we present theoretical results which may be considered as a prediction. Further, we have studied temperature variation of Debye temperature ( ) and dynamical elastic constants ( , and ). As experimental results are not available for elastic constants, we have compared our results with the values obtained by first principles method. Presently obtained results are comparable with such theoretical results.
{"title":"Lattice mechanical properties of Rh0.6Ag0.4 and Rh0.8Ag0.2: A pseudopotential approach","authors":"Nupur P. Vora, Priyank V. Kumar, S. Vyas, N. K. Bhatt, P. R. Vyas, V. Gohel","doi":"10.1063/5.0061023","DOIUrl":"https://doi.org/10.1063/5.0061023","url":null,"abstract":"Transition metal alloys are valuable in material science research. In the present communication, Transition Metal Pseudopotential has been used to investigate lattice dynamics in symmetry and non-symmetry directions for binary alloy h ( = 0.6, 0.8). In absence of any neutron scattering data and theoretical results, we present theoretical results which may be considered as a prediction. Further, we have studied temperature variation of Debye temperature ( ) and dynamical elastic constants ( , and ). As experimental results are not available for elastic constants, we have compared our results with the values obtained by first principles method. Presently obtained results are comparable with such theoretical results.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87304995","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}
A. V. Nag, P. Kumar, D. S. Tripathi, N. K. Bhatt, P. R. Vyas, V. Gohel
In the present manuscript, we have confirmed the credibility of our proposed pseudopotential extracted from the generalized pseudopotential theory, by carrying out lattice dynamical and lattice mechanical studies for bcc binary molybdenum and niobium alloys. Here, we have calculated phonon dispersion curves, phonon density of states and temperature variation of Debye temperature ( ) for Mo0.41 Nb0.59 alloy. In addition to that, we have obtained the values of dynamical elastic constants (C11, C12 and C44) for Mo0.339 Nb0.661 alloy. The acquired results are quite reassuring in comparison to the experimental data and other theoretical calculations.
{"title":"Study of phonon dispersion and dynamical elastic constants for bcc binary molybdenum-niobium alloys","authors":"A. V. Nag, P. Kumar, D. S. Tripathi, N. K. Bhatt, P. R. Vyas, V. Gohel","doi":"10.1063/5.0061022","DOIUrl":"https://doi.org/10.1063/5.0061022","url":null,"abstract":"In the present manuscript, we have confirmed the credibility of our proposed pseudopotential extracted from the generalized pseudopotential theory, by carrying out lattice dynamical and lattice mechanical studies for bcc binary molybdenum and niobium alloys. Here, we have calculated phonon dispersion curves, phonon density of states and temperature variation of Debye temperature ( ) for Mo0.41 Nb0.59 alloy. In addition to that, we have obtained the values of dynamical elastic constants (C11, C12 and C44) for Mo0.339 Nb0.661 alloy. The acquired results are quite reassuring in comparison to the experimental data and other theoretical calculations.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78652794","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}
P. R. Babu, B. Srimathy, K. Shakila, M. LakshmiPriya, R. Arivuselvi
Rare earth Ions (Y,Gd,Sm) doped TiO2 catalysts were prepared by the sol-gel method. Synthesized material was characterized by X-ray diffraction (XRD), UV-Diffuse reflectance spectroscopy (DRS), FTIR (Fourier Transform Infrared Spectroscopy), SEM (Scanning electron microscopy) and TEM (Transmission electron microscopy). The increase in photo activity is probably analyzed by the shift transfer in UV-DRS and it was confirmed by the degradation of Methylene Blue in water under UV-light irradiation was used to evaluate the photocatalytic activity of prepared catalysts. The result showed that the Tridoping of the rare earth ions can significantly enhance the photocatalytic activity of TiO2 doped rare earth compare with the pristine TiO2.
{"title":"Investigation on photocatalytic properties of RE-Doped titanium dioxide nanoparticles through sol - gel technique","authors":"P. R. Babu, B. Srimathy, K. Shakila, M. LakshmiPriya, R. Arivuselvi","doi":"10.1063/5.0060851","DOIUrl":"https://doi.org/10.1063/5.0060851","url":null,"abstract":"Rare earth Ions (Y,Gd,Sm) doped TiO2 catalysts were prepared by the sol-gel method. Synthesized material was characterized by X-ray diffraction (XRD), UV-Diffuse reflectance spectroscopy (DRS), FTIR (Fourier Transform Infrared Spectroscopy), SEM (Scanning electron microscopy) and TEM (Transmission electron microscopy). The increase in photo activity is probably analyzed by the shift transfer in UV-DRS and it was confirmed by the degradation of Methylene Blue in water under UV-light irradiation was used to evaluate the photocatalytic activity of prepared catalysts. The result showed that the Tridoping of the rare earth ions can significantly enhance the photocatalytic activity of TiO2 doped rare earth compare with the pristine TiO2.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"494 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85617416","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}
B. H. Devmunde, D. P. Nandagawali, M. B. Solunke, D. R. Shengule
The intent of begun work is to synthesis and study the structural, electric, magnetic and frequency dependent dielectric properties of Ni0.6Cd0.4Fe2O4 NPs fabricated via sol-gel auto-combustion technic. The XRD data affirmed that the synthesized Ni0.6Cd0.4Fe2O4 NPs do possess a single phase; spinel structure; cubic geometry and ferrite in nature. The lattice constant (a) was estimated to be 8.363 Å and the crystallite size (t) determined from Debay-Scherrer method was found to be 48.70 nm. SEM images of Ni0.6Cd0.4Fe2O4 NPs may propose the spherically shaped with the formation of fusion in gains. Activation energy (∆E) determined from the Arrhenius relation was recorded as 0.03 eV. Eventually, comprehensive magnetic parameters viz. (Ms), (Hc), (nB) were shown to be decreased in comparison to the unloaded NiFe2O4 ferrite as an effect on non-magnetic Cd2+ ions over magnetic Ni2+ and Fe3+ ions.
{"title":"Sol-gel auto-combustion synthesis, cation distribution and physicochemical properties of Ni0.6Cd0.4Fe2O4 NPs","authors":"B. H. Devmunde, D. P. Nandagawali, M. B. Solunke, D. R. Shengule","doi":"10.1063/5.0061166","DOIUrl":"https://doi.org/10.1063/5.0061166","url":null,"abstract":"The intent of begun work is to synthesis and study the structural, electric, magnetic and frequency dependent dielectric properties of Ni0.6Cd0.4Fe2O4 NPs fabricated via sol-gel auto-combustion technic. The XRD data affirmed that the synthesized Ni0.6Cd0.4Fe2O4 NPs do possess a single phase; spinel structure; cubic geometry and ferrite in nature. The lattice constant (a) was estimated to be 8.363 Å and the crystallite size (t) determined from Debay-Scherrer method was found to be 48.70 nm. SEM images of Ni0.6Cd0.4Fe2O4 NPs may propose the spherically shaped with the formation of fusion in gains. Activation energy (∆E) determined from the Arrhenius relation was recorded as 0.03 eV. Eventually, comprehensive magnetic parameters viz. (Ms), (Hc), (nB) were shown to be decreased in comparison to the unloaded NiFe2O4 ferrite as an effect on non-magnetic Cd2+ ions over magnetic Ni2+ and Fe3+ ions.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85966419","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}
The photoelectrochemical performance of Ag coated CeO2 functionalized TiO2 nanotube arrays (AgCeTNT) is investigated here. The sample is prepared via three steps, such as synthesis of TiO2 nanotube by electrochemical anodization, CeO2 functionalization by hydrothermal and Ag coating by Successive Ionic Layer Adsorption and Reaction (SILAR) method. X-ray diffraction (XRD) analysis showed the anatase phase formation after annealing of TiO2 nanotubes. Field Emission Scanning Electron Microscopic (FESEM) images showed the conformal coverage of CeO2 and Ag nanoparticles on the surface of TiO2 nanotubes. Energy Dispersive X-Ray (EDX) analysis confirmed the presence of Ce, Ag, Ti and O in the AgCeTNT sample. Diffuse Reflectance Spectroscopy (DRS) study revealed the enhancement in visible light sensitivity with CeO2 functionalization and further with Ag coating. The photoelectrochemical measurement showed that the AgCeTNT sample exhibits improved photoelectrochemical performance compared to bare TiO2 nanotubes (TNT), CeO2 functionalized TiO2 nanotubes (CeTNT) and Ag coated TiO2 nanotubes (AgTNT) under the illumination of sunlight. This improvement in photoelectrochemical performance happeneddue to the combined effect of favorable band alignment of CeO2 and TiO2 and Surface Plasmon Resonance (SPR) effect of Ag nanoparticles, which lead to superior charge separation, efficient charge transport and enhanced visible light response.
{"title":"Enhanced photoelectrochemical performance of CeO2 functionalized TiO2 nanotube arrays with Ag coating","authors":"S. Dey, Nasima Khatun, Somnath C. Roy","doi":"10.1063/5.0060970","DOIUrl":"https://doi.org/10.1063/5.0060970","url":null,"abstract":"The photoelectrochemical performance of Ag coated CeO2 functionalized TiO2 nanotube arrays (AgCeTNT) is investigated here. The sample is prepared via three steps, such as synthesis of TiO2 nanotube by electrochemical anodization, CeO2 functionalization by hydrothermal and Ag coating by Successive Ionic Layer Adsorption and Reaction (SILAR) method. X-ray diffraction (XRD) analysis showed the anatase phase formation after annealing of TiO2 nanotubes. Field Emission Scanning Electron Microscopic (FESEM) images showed the conformal coverage of CeO2 and Ag nanoparticles on the surface of TiO2 nanotubes. Energy Dispersive X-Ray (EDX) analysis confirmed the presence of Ce, Ag, Ti and O in the AgCeTNT sample. Diffuse Reflectance Spectroscopy (DRS) study revealed the enhancement in visible light sensitivity with CeO2 functionalization and further with Ag coating. The photoelectrochemical measurement showed that the AgCeTNT sample exhibits improved photoelectrochemical performance compared to bare TiO2 nanotubes (TNT), CeO2 functionalized TiO2 nanotubes (CeTNT) and Ag coated TiO2 nanotubes (AgTNT) under the illumination of sunlight. This improvement in photoelectrochemical performance happeneddue to the combined effect of favorable band alignment of CeO2 and TiO2 and Surface Plasmon Resonance (SPR) effect of Ag nanoparticles, which lead to superior charge separation, efficient charge transport and enhanced visible light response.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91232754","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}
Selected ancient sandstone monuments (56 th centuries) from Aihole, Pattadakal from Bagalkot district, local quarries stone and sandstone sample of Akkaragall quarries of India were characterized for their mineralogical and physical properties. X-ray diffraction (XRD) coupled with scanning electron microscopy (SEM) are used to discuss the ancient ceramic technology and composition. From XRD analysis we observed that Durga temple and Iranna padi quarry sand stone sample contains Quartz & chromium whereas Akkaragall quarry sand stone sample contains Quartz and silica. Particular attention were given to the analysis of composition of monuments stone with quarries stone and its decay.
{"title":"Decay study of monument sand stones","authors":"ra Kuri, S. Dadami, Manjula V. Katageri","doi":"10.1063/5.0061210","DOIUrl":"https://doi.org/10.1063/5.0061210","url":null,"abstract":"Selected ancient sandstone monuments (56 th centuries) from Aihole, Pattadakal from Bagalkot district, local quarries stone and sandstone sample of Akkaragall quarries of India were characterized for their mineralogical and physical properties. X-ray diffraction (XRD) coupled with scanning electron microscopy (SEM) are used to discuss the ancient ceramic technology and composition. From XRD analysis we observed that Durga temple and Iranna padi quarry sand stone sample contains Quartz & chromium whereas Akkaragall quarry sand stone sample contains Quartz and silica. Particular attention were given to the analysis of composition of monuments stone with quarries stone and its decay.","PeriodicalId":18837,"journal":{"name":"NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87372721","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}