NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS: NCPCM2020最新文献

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}

{"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}