The kinetic outcome shows unit order for heptavalent manganese (HVMG) and fractional orders for substrate cefadroxil (CFR) and H+ ions. Five oxidation products of CFR were identified by mass spectral analysis. The effect of different parameters on the oxidation kinetics of CFR by HVMG was studied thoroughly. Permanganic acid is found to be an active dominant and strong oxidizing species. The pH dependent second order rate constants were determined and found higher in acidic medium. Rate constants and activation parameters were evaluated from the influence of variation in temperature on the rate of reaction. The plausible mechanism and derived rate law are consistent with the experimental results. There is a formation of intermediate complex between CFR and HVMG which subsequently degrades into various degraded products.The kinetic outcome shows unit order for heptavalent manganese (HVMG) and fractional orders for substrate cefadroxil (CFR) and H+ ions. Five oxidation products of CFR were identified by mass spectral analysis. The effect of different parameters on the oxidation kinetics of CFR by HVMG was studied thoroughly. Permanganic acid is found to be an active dominant and strong oxidizing species. The pH dependent second order rate constants were determined and found higher in acidic medium. Rate constants and activation parameters were evaluated from the influence of variation in temperature on the rate of reaction. The plausible mechanism and derived rate law are consistent with the experimental results. There is a formation of intermediate complex between CFR and HVMG which subsequently degrades into various degraded products.
{"title":"Uncatalysed oxidative degradation of cefadroxil by heptavalent manganese during water treatment: Reaction kinetics and pathways","authors":"V. S. Bhamare, Raviraj M. Kulkarni","doi":"10.1063/1.5122651","DOIUrl":"https://doi.org/10.1063/1.5122651","url":null,"abstract":"The kinetic outcome shows unit order for heptavalent manganese (HVMG) and fractional orders for substrate cefadroxil (CFR) and H+ ions. Five oxidation products of CFR were identified by mass spectral analysis. The effect of different parameters on the oxidation kinetics of CFR by HVMG was studied thoroughly. Permanganic acid is found to be an active dominant and strong oxidizing species. The pH dependent second order rate constants were determined and found higher in acidic medium. Rate constants and activation parameters were evaluated from the influence of variation in temperature on the rate of reaction. The plausible mechanism and derived rate law are consistent with the experimental results. There is a formation of intermediate complex between CFR and HVMG which subsequently degrades into various degraded products.The kinetic outcome shows unit order for heptavalent manganese (HVMG) and fractional orders for substrate cefadroxil (CFR) and H+ ions. Five oxidation products of CFR were identified by mass spectral analysis. The effect of different parameters on the oxidation kinetics of CFR by HVMG was studied thoroughly. Permanganic acid is found to be an active dominant and strong oxidizing species. The pH dependent second order rate constants were determined and found higher in acidic medium. Rate constants and activation parameters were evaluated from the influence of variation in temperature on the rate of reaction. The plausible mechanism and derived rate law are consistent with the experimental results. There is a formation of intermediate complex between CFR and HVMG which subsequently degrades into various degraded products.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82538328","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}
Jogender Singh, A. Agarwal, S. Sanghi, M. Yadav, Tanvi Bhasin, U. Bhakar
The change in structural behaviour, magnetic measurement & dielectric characteristics of polycrystalline Bi0.90-xLa0.10HoxFeO3(0.15& 0.15) and labelled as LH15 and LH20 respectively) which were prepared using method of the solid-state reaction, have been investigated. The powder X-ray diffraction and Rietveld refinement of the XRD spectrum indicates that Bi0.90La0.10FeO3multiferroics have single phase in R3c. Rietveld refined spectrum of the XRD conclude that holmium substitution at A-site for the samples LH15 is crystallized as combo of rhombohedral R3c and orthorhombic Pbam space group. Holmium substitution for LH20 has changed the rhombohedral R3c symmetry of Bi0.90La0.10FeO3 to the orthorhombic Pbam symmetry. The magnetic behaviour was studied by recording magnetization with magnetic up to ±6kOe. Weak ferromagnetic behaviour of all samples attributes that co-doping effectively concealed spiral spin configuration by altering the canting angle. Dielectric behaviour of prepared ceramic compounds was carried by impedance analyser within frequency ranged 100Hz - 7MHz for different temperatures.The change in structural behaviour, magnetic measurement & dielectric characteristics of polycrystalline Bi0.90-xLa0.10HoxFeO3(0.15& 0.15) and labelled as LH15 and LH20 respectively) which were prepared using method of the solid-state reaction, have been investigated. The powder X-ray diffraction and Rietveld refinement of the XRD spectrum indicates that Bi0.90La0.10FeO3multiferroics have single phase in R3c. Rietveld refined spectrum of the XRD conclude that holmium substitution at A-site for the samples LH15 is crystallized as combo of rhombohedral R3c and orthorhombic Pbam space group. Holmium substitution for LH20 has changed the rhombohedral R3c symmetry of Bi0.90La0.10FeO3 to the orthorhombic Pbam symmetry. The magnetic behaviour was studied by recording magnetization with magnetic up to ±6kOe. Weak ferromagnetic behaviour of all samples attributes that co-doping effectively concealed spiral spin configuration by altering the canting angle. Dielectric behaviour of prepared ceramic compounds was carr...
{"title":"Investigation of the crystal structure, magnetic properties and dielectric properties of Ho substituted Bi0.90La0.10FeO3 multiferroics","authors":"Jogender Singh, A. Agarwal, S. Sanghi, M. Yadav, Tanvi Bhasin, U. Bhakar","doi":"10.1063/1.5122454","DOIUrl":"https://doi.org/10.1063/1.5122454","url":null,"abstract":"The change in structural behaviour, magnetic measurement & dielectric characteristics of polycrystalline Bi0.90-xLa0.10HoxFeO3(0.15& 0.15) and labelled as LH15 and LH20 respectively) which were prepared using method of the solid-state reaction, have been investigated. The powder X-ray diffraction and Rietveld refinement of the XRD spectrum indicates that Bi0.90La0.10FeO3multiferroics have single phase in R3c. Rietveld refined spectrum of the XRD conclude that holmium substitution at A-site for the samples LH15 is crystallized as combo of rhombohedral R3c and orthorhombic Pbam space group. Holmium substitution for LH20 has changed the rhombohedral R3c symmetry of Bi0.90La0.10FeO3 to the orthorhombic Pbam symmetry. The magnetic behaviour was studied by recording magnetization with magnetic up to ±6kOe. Weak ferromagnetic behaviour of all samples attributes that co-doping effectively concealed spiral spin configuration by altering the canting angle. Dielectric behaviour of prepared ceramic compounds was carried by impedance analyser within frequency ranged 100Hz - 7MHz for different temperatures.The change in structural behaviour, magnetic measurement & dielectric characteristics of polycrystalline Bi0.90-xLa0.10HoxFeO3(0.15& 0.15) and labelled as LH15 and LH20 respectively) which were prepared using method of the solid-state reaction, have been investigated. The powder X-ray diffraction and Rietveld refinement of the XRD spectrum indicates that Bi0.90La0.10FeO3multiferroics have single phase in R3c. Rietveld refined spectrum of the XRD conclude that holmium substitution at A-site for the samples LH15 is crystallized as combo of rhombohedral R3c and orthorhombic Pbam space group. Holmium substitution for LH20 has changed the rhombohedral R3c symmetry of Bi0.90La0.10FeO3 to the orthorhombic Pbam symmetry. The magnetic behaviour was studied by recording magnetization with magnetic up to ±6kOe. Weak ferromagnetic behaviour of all samples attributes that co-doping effectively concealed spiral spin configuration by altering the canting angle. Dielectric behaviour of prepared ceramic compounds was carr...","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74436288","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}
CuS-ZnS nanocomposite films were synthesized through the interaction of H2S gas with nanostructured Cu-Zn films deposited through vacuum evaporation technique at a relatively high pressure of an inert gas. The film samples were synthesized for four different atom% of Zn. XPS analysis showed that both Cu and Zn existed in the +2 oxidation state in the samples. XRD patterns showed that in the samples, CuS and ZnS existed as separate phases and hence the samples were copper sulphide-zinc sulphide nanocomposite films. Also, HRTEM image and SAED pattern of the sample containing the highest atom% of Zn confirmed the co-existence of both CuS and ZnS phases in the sample. The grain size of CuS which was the major phase in the CuS-ZnS nanocomposite films decreased with increase in the atom% of Zn. Red shift of the Raman modes of CuS phase in the samples was an indication of substitutional doping of Zn into the CuS lattice. Analysis of optical absorption and reflection spectra of the samples indicated the possible ...
{"title":"Structural and optical properties of CuS-ZnS nanocomposite films containing different at% of Zn","authors":"S. Sandhya, M. A. Khadar","doi":"10.1063/1.5122441","DOIUrl":"https://doi.org/10.1063/1.5122441","url":null,"abstract":"CuS-ZnS nanocomposite films were synthesized through the interaction of H2S gas with nanostructured Cu-Zn films deposited through vacuum evaporation technique at a relatively high pressure of an inert gas. The film samples were synthesized for four different atom% of Zn. XPS analysis showed that both Cu and Zn existed in the +2 oxidation state in the samples. XRD patterns showed that in the samples, CuS and ZnS existed as separate phases and hence the samples were copper sulphide-zinc sulphide nanocomposite films. Also, HRTEM image and SAED pattern of the sample containing the highest atom% of Zn confirmed the co-existence of both CuS and ZnS phases in the sample. The grain size of CuS which was the major phase in the CuS-ZnS nanocomposite films decreased with increase in the atom% of Zn. Red shift of the Raman modes of CuS phase in the samples was an indication of substitutional doping of Zn into the CuS lattice. Analysis of optical absorption and reflection spectra of the samples indicated the possible ...","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74521742","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}
R. Kannan, E. Selvakumar, M. Selvambikai, S. Venkateshwaran, K. R. Aranganayagam
The nano crystalline thin coating of nickel (Ni) and tungsten (W) on the surface of mild steel at different temperatures has been successfully carried out by using electroplating technique in order to enhance the mechanical properties of mild steel. The structural characteristics of mild steel were analyzed by Scanning Electron Microscope (SEM) and X-ray Diffraction method (XRD). The mechanical properties such as hardness and surface roughness were evaluated by using digital Rockwell hardness tester and Stylus profilometer. The wear characteristics of mild steel were studied by using Pin on disc method. The coated mild steel exhibits better properties than the base metal and its promising future in different fields has been discussed. The variations in such properties of the coated mild steel were also investigated.The nano crystalline thin coating of nickel (Ni) and tungsten (W) on the surface of mild steel at different temperatures has been successfully carried out by using electroplating technique in order to enhance the mechanical properties of mild steel. The structural characteristics of mild steel were analyzed by Scanning Electron Microscope (SEM) and X-ray Diffraction method (XRD). The mechanical properties such as hardness and surface roughness were evaluated by using digital Rockwell hardness tester and Stylus profilometer. The wear characteristics of mild steel were studied by using Pin on disc method. The coated mild steel exhibits better properties than the base metal and its promising future in different fields has been discussed. The variations in such properties of the coated mild steel were also investigated.
{"title":"An investigation of electroplated nickel (Ni) and tungsten (W) nano crystalline coatings on mild steel: Structural, mechanical and tribological behaviour","authors":"R. Kannan, E. Selvakumar, M. Selvambikai, S. Venkateshwaran, K. R. Aranganayagam","doi":"10.1063/1.5122431","DOIUrl":"https://doi.org/10.1063/1.5122431","url":null,"abstract":"The nano crystalline thin coating of nickel (Ni) and tungsten (W) on the surface of mild steel at different temperatures has been successfully carried out by using electroplating technique in order to enhance the mechanical properties of mild steel. The structural characteristics of mild steel were analyzed by Scanning Electron Microscope (SEM) and X-ray Diffraction method (XRD). The mechanical properties such as hardness and surface roughness were evaluated by using digital Rockwell hardness tester and Stylus profilometer. The wear characteristics of mild steel were studied by using Pin on disc method. The coated mild steel exhibits better properties than the base metal and its promising future in different fields has been discussed. The variations in such properties of the coated mild steel were also investigated.The nano crystalline thin coating of nickel (Ni) and tungsten (W) on the surface of mild steel at different temperatures has been successfully carried out by using electroplating technique in order to enhance the mechanical properties of mild steel. The structural characteristics of mild steel were analyzed by Scanning Electron Microscope (SEM) and X-ray Diffraction method (XRD). The mechanical properties such as hardness and surface roughness were evaluated by using digital Rockwell hardness tester and Stylus profilometer. The wear characteristics of mild steel were studied by using Pin on disc method. The coated mild steel exhibits better properties than the base metal and its promising future in different fields has been discussed. The variations in such properties of the coated mild steel were also investigated.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81565167","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}
We present experiments that are convenient and educational for optical study of ruby crystal. The experiments and data analysis were carried out in optical laboratory. Where we go through the theory and applications of Absorption, Fourier Transform Infrared Spectroscopy(FTIR) and Raman spectroscopy. In the absorption spectroscopy we measure the transitions from ground to excited state. For this UV & IR ranges wavelength are used (300nm to 900nm). In FTIR absorption and emission spectrum of ruby sample are obtained. Raman spectroscopy to observe vibrational, rotational and other low frequency modesWe present experiments that are convenient and educational for optical study of ruby crystal. The experiments and data analysis were carried out in optical laboratory. Where we go through the theory and applications of Absorption, Fourier Transform Infrared Spectroscopy(FTIR) and Raman spectroscopy. In the absorption spectroscopy we measure the transitions from ground to excited state. For this UV & IR ranges wavelength are used (300nm to 900nm). In FTIR absorption and emission spectrum of ruby sample are obtained. Raman spectroscopy to observe vibrational, rotational and other low frequency modes
{"title":"Optical studies of ruby crystal","authors":"Pawan Kumar, K. Kumar, D. Joseph","doi":"10.1063/1.5122520","DOIUrl":"https://doi.org/10.1063/1.5122520","url":null,"abstract":"We present experiments that are convenient and educational for optical study of ruby crystal. The experiments and data analysis were carried out in optical laboratory. Where we go through the theory and applications of Absorption, Fourier Transform Infrared Spectroscopy(FTIR) and Raman spectroscopy. In the absorption spectroscopy we measure the transitions from ground to excited state. For this UV & IR ranges wavelength are used (300nm to 900nm). In FTIR absorption and emission spectrum of ruby sample are obtained. Raman spectroscopy to observe vibrational, rotational and other low frequency modesWe present experiments that are convenient and educational for optical study of ruby crystal. The experiments and data analysis were carried out in optical laboratory. Where we go through the theory and applications of Absorption, Fourier Transform Infrared Spectroscopy(FTIR) and Raman spectroscopy. In the absorption spectroscopy we measure the transitions from ground to excited state. For this UV & IR ranges wavelength are used (300nm to 900nm). In FTIR absorption and emission spectrum of ruby sample are obtained. Raman spectroscopy to observe vibrational, rotational and other low frequency modes","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85766360","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}
Nihal, R. Sharma, J. Goswamy, S. Tripathi, Mamta Sharma
In this paper, the tungsten oxide (WO3) nanofiberhas been fabricated via a hydrothermal by taking H2WO4 as precursors. The H2WO4 precursors are prepared by reaction between aqueous Na2WO4 and HCl solution. The tungsten oxide (WO3) nanofiberhas been doped with reduced graphene oxide (rGO). The as prepared samples are characterized by UV/Vis spectroscopy, FTIR spectroscopy, and X-ray diffraction. In optical properties, the band gap of WO3 nanofiberand rGO/ WO3 nanocomposite has been calculated.In this paper, the tungsten oxide (WO3) nanofiberhas been fabricated via a hydrothermal by taking H2WO4 as precursors. The H2WO4 precursors are prepared by reaction between aqueous Na2WO4 and HCl solution. The tungsten oxide (WO3) nanofiberhas been doped with reduced graphene oxide (rGO). The as prepared samples are characterized by UV/Vis spectroscopy, FTIR spectroscopy, and X-ray diffraction. In optical properties, the band gap of WO3 nanofiberand rGO/ WO3 nanocomposite has been calculated.
{"title":"Effect of rGO doping on hydrothermally synthesized WO3 Nanofibers","authors":"Nihal, R. Sharma, J. Goswamy, S. Tripathi, Mamta Sharma","doi":"10.1063/1.5122437","DOIUrl":"https://doi.org/10.1063/1.5122437","url":null,"abstract":"In this paper, the tungsten oxide (WO3) nanofiberhas been fabricated via a hydrothermal by taking H2WO4 as precursors. The H2WO4 precursors are prepared by reaction between aqueous Na2WO4 and HCl solution. The tungsten oxide (WO3) nanofiberhas been doped with reduced graphene oxide (rGO). The as prepared samples are characterized by UV/Vis spectroscopy, FTIR spectroscopy, and X-ray diffraction. In optical properties, the band gap of WO3 nanofiberand rGO/ WO3 nanocomposite has been calculated.In this paper, the tungsten oxide (WO3) nanofiberhas been fabricated via a hydrothermal by taking H2WO4 as precursors. The H2WO4 precursors are prepared by reaction between aqueous Na2WO4 and HCl solution. The tungsten oxide (WO3) nanofiberhas been doped with reduced graphene oxide (rGO). The as prepared samples are characterized by UV/Vis spectroscopy, FTIR spectroscopy, and X-ray diffraction. In optical properties, the band gap of WO3 nanofiberand rGO/ WO3 nanocomposite has been calculated.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"111 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80809130","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}
Ruthenium doped titanium dioxide nanoparticles (RDTDONPs) were prepared by liquid impregnation method to use as a photocatalyst. These particles were characterized by different methods and used for the photocatalytic degradation of drug Linezolid (LNZ) under UV illumination at 254 nm for pH ranging from 4.0 to 8.0. Five UV degraded products of LNZ were identified by High Resolution Mass Spectrophotometry (HR-MS). The average crystallite size of photocatalysts were found to be 17.08 nm, 16.71 nm, 15.65 nm and 14.36 nm for undoped titanium dioxide nanoparticles (UTDONPs), 0.2%, 0.4% and 0.8% (mole ratio) RDTDONPs respectively using Scherrer equation. This shows that the photocatalytic activity in 0.8% (mole ratio) RDTDONPs is higher due to increase in surface activity. The observed rate constants (kobs) were found to be increased with increase in the dosage of the photocatalyst. The values of kobs were found to be increased with decrease in pH. Kinetic data reveals that there is initial increase in the values of kobs with increase in the [LNZ]. Photo-degradation electron hole pair mechanism is proposed in agreement with the experimental results. Kinetic experiments show that the values of kobs increases with increase in light intensity.Ruthenium doped titanium dioxide nanoparticles (RDTDONPs) were prepared by liquid impregnation method to use as a photocatalyst. These particles were characterized by different methods and used for the photocatalytic degradation of drug Linezolid (LNZ) under UV illumination at 254 nm for pH ranging from 4.0 to 8.0. Five UV degraded products of LNZ were identified by High Resolution Mass Spectrophotometry (HR-MS). The average crystallite size of photocatalysts were found to be 17.08 nm, 16.71 nm, 15.65 nm and 14.36 nm for undoped titanium dioxide nanoparticles (UTDONPs), 0.2%, 0.4% and 0.8% (mole ratio) RDTDONPs respectively using Scherrer equation. This shows that the photocatalytic activity in 0.8% (mole ratio) RDTDONPs is higher due to increase in surface activity. The observed rate constants (kobs) were found to be increased with increase in the dosage of the photocatalyst. The values of kobs were found to be increased with decrease in pH. Kinetic data reveals that there is initial increase in the valu...
{"title":"Synthesis, characterisation and photocatalytic degradation of linezolid during water treatment by ruthenium doped titanium dioxide semiconducting nanoparticles","authors":"V. S. Bhamare, Raviraj M. Kulkarni","doi":"10.1063/1.5122652","DOIUrl":"https://doi.org/10.1063/1.5122652","url":null,"abstract":"Ruthenium doped titanium dioxide nanoparticles (RDTDONPs) were prepared by liquid impregnation method to use as a photocatalyst. These particles were characterized by different methods and used for the photocatalytic degradation of drug Linezolid (LNZ) under UV illumination at 254 nm for pH ranging from 4.0 to 8.0. Five UV degraded products of LNZ were identified by High Resolution Mass Spectrophotometry (HR-MS). The average crystallite size of photocatalysts were found to be 17.08 nm, 16.71 nm, 15.65 nm and 14.36 nm for undoped titanium dioxide nanoparticles (UTDONPs), 0.2%, 0.4% and 0.8% (mole ratio) RDTDONPs respectively using Scherrer equation. This shows that the photocatalytic activity in 0.8% (mole ratio) RDTDONPs is higher due to increase in surface activity. The observed rate constants (kobs) were found to be increased with increase in the dosage of the photocatalyst. The values of kobs were found to be increased with decrease in pH. Kinetic data reveals that there is initial increase in the values of kobs with increase in the [LNZ]. Photo-degradation electron hole pair mechanism is proposed in agreement with the experimental results. Kinetic experiments show that the values of kobs increases with increase in light intensity.Ruthenium doped titanium dioxide nanoparticles (RDTDONPs) were prepared by liquid impregnation method to use as a photocatalyst. These particles were characterized by different methods and used for the photocatalytic degradation of drug Linezolid (LNZ) under UV illumination at 254 nm for pH ranging from 4.0 to 8.0. Five UV degraded products of LNZ were identified by High Resolution Mass Spectrophotometry (HR-MS). The average crystallite size of photocatalysts were found to be 17.08 nm, 16.71 nm, 15.65 nm and 14.36 nm for undoped titanium dioxide nanoparticles (UTDONPs), 0.2%, 0.4% and 0.8% (mole ratio) RDTDONPs respectively using Scherrer equation. This shows that the photocatalytic activity in 0.8% (mole ratio) RDTDONPs is higher due to increase in surface activity. The observed rate constants (kobs) were found to be increased with increase in the dosage of the photocatalyst. The values of kobs were found to be increased with decrease in pH. Kinetic data reveals that there is initial increase in the valu...","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84116024","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 energy problem is the most fascinating problem in this world because the way of success of every country is depending upon the development of the low cost, well-ordered and high efficiency energy source devices. There are several research groups are working to develop the devices for renewable energy sources. So we are going to focusour research on solar cells materials for renewable energy sources like Zinc Oxide (ZnO). This material ishighly useful for making the heterojunction solar cell as well as window layer. Other hand ZnO is used for 3rd generation/DSSC. In this direction we have synthesized zinc oxide (ZnO) nanoparticles by low cost co-precipitation method without any surfactants. The synthesized ZnO nanoparticles have done the characterizations like X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDS) to evaluate shape, size, reproducibility and morphology of nanoparticles.The energy problem is the most fascinating problem in this world because the way of success of every country is depending upon the development of the low cost, well-ordered and high efficiency energy source devices. There are several research groups are working to develop the devices for renewable energy sources. So we are going to focusour research on solar cells materials for renewable energy sources like Zinc Oxide (ZnO). This material ishighly useful for making the heterojunction solar cell as well as window layer. Other hand ZnO is used for 3rd generation/DSSC. In this direction we have synthesized zinc oxide (ZnO) nanoparticles by low cost co-precipitation method without any surfactants. The synthesized ZnO nanoparticles have done the characterizations like X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDS) to evaluate shape, size, reproducibility and morphology of nanoparticles.
{"title":"Synthesis and characterization of ZnO nano-particles for solar cell application by the cost effective co-precipitation method without any surfactants","authors":"Shweta, K. Pal, K. Thapa","doi":"10.1063/1.5122336","DOIUrl":"https://doi.org/10.1063/1.5122336","url":null,"abstract":"The energy problem is the most fascinating problem in this world because the way of success of every country is depending upon the development of the low cost, well-ordered and high efficiency energy source devices. There are several research groups are working to develop the devices for renewable energy sources. So we are going to focusour research on solar cells materials for renewable energy sources like Zinc Oxide (ZnO). This material ishighly useful for making the heterojunction solar cell as well as window layer. Other hand ZnO is used for 3rd generation/DSSC. In this direction we have synthesized zinc oxide (ZnO) nanoparticles by low cost co-precipitation method without any surfactants. The synthesized ZnO nanoparticles have done the characterizations like X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDS) to evaluate shape, size, reproducibility and morphology of nanoparticles.The energy problem is the most fascinating problem in this world because the way of success of every country is depending upon the development of the low cost, well-ordered and high efficiency energy source devices. There are several research groups are working to develop the devices for renewable energy sources. So we are going to focusour research on solar cells materials for renewable energy sources like Zinc Oxide (ZnO). This material ishighly useful for making the heterojunction solar cell as well as window layer. Other hand ZnO is used for 3rd generation/DSSC. In this direction we have synthesized zinc oxide (ZnO) nanoparticles by low cost co-precipitation method without any surfactants. The synthesized ZnO nanoparticles have done the characterizations like X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDS) to evaluate shape, size, reproducibility and morphology of nanoparticles.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"103 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88975234","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}
Schiff base play an important role in the development of Coordination Chemistry as they readily form stable coordination compounds with most of the transition metal ions. They are synthesized from the condensation of an amino compound with carbonyl compounds. This review article compiles most promising applied Schiff bases and their complexes with their applications in different areas of life. These coordination compounds have been characterized on the basis of elemental analyses, molecular weight, molar conductance, spectral (IR, reflectance, 1H NMR, ESR) and magnetic susceptibility measurements. The coordination compounds widely used as catalyst in various reactions. They also show excellent biological activities like antiinflammatory, scavenging, analgesic, antibiotic, antioxidative, antifungal, antibacterial, antiviral and enzymaticactivities. This review summarizes the chemistry and application of metal Schiff bases complexes.Schiff base play an important role in the development of Coordination Chemistry as they readily form stable coordination compounds with most of the transition metal ions. They are synthesized from the condensation of an amino compound with carbonyl compounds. This review article compiles most promising applied Schiff bases and their complexes with their applications in different areas of life. These coordination compounds have been characterized on the basis of elemental analyses, molecular weight, molar conductance, spectral (IR, reflectance, 1H NMR, ESR) and magnetic susceptibility measurements. The coordination compounds widely used as catalyst in various reactions. They also show excellent biological activities like antiinflammatory, scavenging, analgesic, antibiotic, antioxidative, antifungal, antibacterial, antiviral and enzymaticactivities. This review summarizes the chemistry and application of metal Schiff bases complexes.
{"title":"Applications of coordination compounds having Schiff bases: A review","authors":"J. Sharma, P. Dogra, N. Sharma, Ajay","doi":"10.1063/1.5122381","DOIUrl":"https://doi.org/10.1063/1.5122381","url":null,"abstract":"Schiff base play an important role in the development of Coordination Chemistry as they readily form stable coordination compounds with most of the transition metal ions. They are synthesized from the condensation of an amino compound with carbonyl compounds. This review article compiles most promising applied Schiff bases and their complexes with their applications in different areas of life. These coordination compounds have been characterized on the basis of elemental analyses, molecular weight, molar conductance, spectral (IR, reflectance, 1H NMR, ESR) and magnetic susceptibility measurements. The coordination compounds widely used as catalyst in various reactions. They also show excellent biological activities like antiinflammatory, scavenging, analgesic, antibiotic, antioxidative, antifungal, antibacterial, antiviral and enzymaticactivities. This review summarizes the chemistry and application of metal Schiff bases complexes.Schiff base play an important role in the development of Coordination Chemistry as they readily form stable coordination compounds with most of the transition metal ions. They are synthesized from the condensation of an amino compound with carbonyl compounds. This review article compiles most promising applied Schiff bases and their complexes with their applications in different areas of life. These coordination compounds have been characterized on the basis of elemental analyses, molecular weight, molar conductance, spectral (IR, reflectance, 1H NMR, ESR) and magnetic susceptibility measurements. The coordination compounds widely used as catalyst in various reactions. They also show excellent biological activities like antiinflammatory, scavenging, analgesic, antibiotic, antioxidative, antifungal, antibacterial, antiviral and enzymaticactivities. This review summarizes the chemistry and application of metal Schiff bases complexes.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79324604","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. Sharma, Pankaj Kumar, Chinky, Ridhima Gahrotra, K. Raina, P. Malik
Polymer dispersed liquid crystal (PDLC) is a striking material and have an enormous role in electro optic display devices. In this paper, nanoparticles (NPs) doped PDLCs in normal mode were prepared from a mixture of UV curable liquid polymer, nematic liquid crystal (LC) and silica NPs by the polymerization induced phase separation (PIPS) process. Morphological study shows the LC droplets cluster formation in pure PDLC and LC droplets with a more uniform phase separated polymer matrix in NPs doped PDLC due to the heterogeneous nucleation rate caused by the increased nucleation at the surface of NPs. Further, electro optic properties of doped and pure PDLC including transmittance, driving voltage, contrast ratio and sharpness as well as slope of the linear region of the transmittance-voltage were measured, compared and analyzed. Driving voltage of NPs doped PDLCs quite improved, however the slope of linear region and contrast ratio declined as compared to pure PDLC.Polymer dispersed liquid crystal (PDLC) is a striking material and have an enormous role in electro optic display devices. In this paper, nanoparticles (NPs) doped PDLCs in normal mode were prepared from a mixture of UV curable liquid polymer, nematic liquid crystal (LC) and silica NPs by the polymerization induced phase separation (PIPS) process. Morphological study shows the LC droplets cluster formation in pure PDLC and LC droplets with a more uniform phase separated polymer matrix in NPs doped PDLC due to the heterogeneous nucleation rate caused by the increased nucleation at the surface of NPs. Further, electro optic properties of doped and pure PDLC including transmittance, driving voltage, contrast ratio and sharpness as well as slope of the linear region of the transmittance-voltage were measured, compared and analyzed. Driving voltage of NPs doped PDLCs quite improved, however the slope of linear region and contrast ratio declined as compared to pure PDLC.
{"title":"Effect of nano particles on electro optic properties of polymer dispersed liquid crystal in normal mode","authors":"V. Sharma, Pankaj Kumar, Chinky, Ridhima Gahrotra, K. Raina, P. Malik","doi":"10.1063/1.5122510","DOIUrl":"https://doi.org/10.1063/1.5122510","url":null,"abstract":"Polymer dispersed liquid crystal (PDLC) is a striking material and have an enormous role in electro optic display devices. In this paper, nanoparticles (NPs) doped PDLCs in normal mode were prepared from a mixture of UV curable liquid polymer, nematic liquid crystal (LC) and silica NPs by the polymerization induced phase separation (PIPS) process. Morphological study shows the LC droplets cluster formation in pure PDLC and LC droplets with a more uniform phase separated polymer matrix in NPs doped PDLC due to the heterogeneous nucleation rate caused by the increased nucleation at the surface of NPs. Further, electro optic properties of doped and pure PDLC including transmittance, driving voltage, contrast ratio and sharpness as well as slope of the linear region of the transmittance-voltage were measured, compared and analyzed. Driving voltage of NPs doped PDLCs quite improved, however the slope of linear region and contrast ratio declined as compared to pure PDLC.Polymer dispersed liquid crystal (PDLC) is a striking material and have an enormous role in electro optic display devices. In this paper, nanoparticles (NPs) doped PDLCs in normal mode were prepared from a mixture of UV curable liquid polymer, nematic liquid crystal (LC) and silica NPs by the polymerization induced phase separation (PIPS) process. Morphological study shows the LC droplets cluster formation in pure PDLC and LC droplets with a more uniform phase separated polymer matrix in NPs doped PDLC due to the heterogeneous nucleation rate caused by the increased nucleation at the surface of NPs. Further, electro optic properties of doped and pure PDLC including transmittance, driving voltage, contrast ratio and sharpness as well as slope of the linear region of the transmittance-voltage were measured, compared and analyzed. Driving voltage of NPs doped PDLCs quite improved, however the slope of linear region and contrast ratio declined as compared to pure PDLC.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"94 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82680953","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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