Sanket Malik, S. Kumari, A. Ohlan, S. Dahiya, R. Punia, A. Maan
The synthetic concept of mesoporous magnetic nanocomposites is a centre of attraction for the scientists as well as technologists. In this work, mesoporous NiFe2O4/reduced Graphene Oxide (rGO) was synthesized based on the nanocasting method, highly ordered mesoporous NiFe2O4 was synthesized via the incipient wetness method using a mesoporous SBA-15 template. An ordered three-dimensional structure is preserved for the NiFe2O4/SBA-15 composite after nanocasting. To dissolve the SBA-15 template hot NaOH solution was used, and then the silica free mesoporous structure of NiFe2O4 was obtained similar to the parent SBA-15. The structural properties were determined by XRD and FT-IR spectroscopy.
{"title":"Synthesis and structural characterization of light-weight ferrite-reduced graphene oxide composite","authors":"Sanket Malik, S. Kumari, A. Ohlan, S. Dahiya, R. Punia, A. Maan","doi":"10.1063/1.5122585","DOIUrl":"https://doi.org/10.1063/1.5122585","url":null,"abstract":"The synthetic concept of mesoporous magnetic nanocomposites is a centre of attraction for the scientists as well as technologists. In this work, mesoporous NiFe2O4/reduced Graphene Oxide (rGO) was synthesized based on the nanocasting method, highly ordered mesoporous NiFe2O4 was synthesized via the incipient wetness method using a mesoporous SBA-15 template. An ordered three-dimensional structure is preserved for the NiFe2O4/SBA-15 composite after nanocasting. To dissolve the SBA-15 template hot NaOH solution was used, and then the silica free mesoporous structure of NiFe2O4 was obtained similar to the parent SBA-15. The structural properties were determined by XRD and FT-IR spectroscopy.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89939899","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}
Dielectric and Electrical properties of Na1-xKxTaO3 (x=0, 0.2 & 0.4) ceramics have been investigated in the temperature range 50°C-450°C at 10 kHz frequency. The samples have been prepared by the conventional solid-state reaction method and sintering process. Lattice parameters have been calculated by XRD pattern and grain size has been calculated by SEM. It is observed that dielectric constant and loss tangent with increasing temperature. Near the transition temperature dielectric constant, loss tangent of these samples show anomalous behavior. All the prepared samples show orthorhombic to Cubic structure at room temperature.Dielectric and Electrical properties of Na1-xKxTaO3 (x=0, 0.2 & 0.4) ceramics have been investigated in the temperature range 50°C-450°C at 10 kHz frequency. The samples have been prepared by the conventional solid-state reaction method and sintering process. Lattice parameters have been calculated by XRD pattern and grain size has been calculated by SEM. It is observed that dielectric constant and loss tangent with increasing temperature. Near the transition temperature dielectric constant, loss tangent of these samples show anomalous behavior. All the prepared samples show orthorhombic to Cubic structure at room temperature.
{"title":"Dielectric properties of sodium potassium tantalate mixed system","authors":"M. Uniyal, S. Bhatt, Sidharth Kashyap","doi":"10.1063/1.5122349","DOIUrl":"https://doi.org/10.1063/1.5122349","url":null,"abstract":"Dielectric and Electrical properties of Na1-xKxTaO3 (x=0, 0.2 & 0.4) ceramics have been investigated in the temperature range 50°C-450°C at 10 kHz frequency. The samples have been prepared by the conventional solid-state reaction method and sintering process. Lattice parameters have been calculated by XRD pattern and grain size has been calculated by SEM. It is observed that dielectric constant and loss tangent with increasing temperature. Near the transition temperature dielectric constant, loss tangent of these samples show anomalous behavior. All the prepared samples show orthorhombic to Cubic structure at room temperature.Dielectric and Electrical properties of Na1-xKxTaO3 (x=0, 0.2 & 0.4) ceramics have been investigated in the temperature range 50°C-450°C at 10 kHz frequency. The samples have been prepared by the conventional solid-state reaction method and sintering process. Lattice parameters have been calculated by XRD pattern and grain size has been calculated by SEM. It is observed that dielectric constant and loss tangent with increasing temperature. Near the transition temperature dielectric constant, loss tangent of these samples show anomalous behavior. All the prepared samples show orthorhombic to Cubic structure at room temperature.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"os-9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87186351","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}
Sputtered Fe/Nb multilayers were prepared with Nb thicknesses dNb of 35 A and with Fe thicknesses dFe of 35 A and sputtered Fe/Nb/Fe trilayers was deposited with Nb thicknesses dNb in the range 50 A and with Fe thicknesses dFe in the range 120 A, respectively using high power impulse magnetron sputtering technique. X-ray reflectivity (XRR) measured patterns revealed the high quality of the film structure with a low surface and interface roughness. Nb thin films synthesized with Nb thicknesses dNb in the range 150-700 A using conventional direct-current magnetron sputtering (CMS) have been compared with those made by high power impulse magnetron sputtering (HIPIMS) operated at the same average power by means of XRR. The obtained XRR patterns were fitted using the Parratt32 software. It was observed that films grown by HIPIMS method have a higher density and interface roughness than that grown by the CMS method. It was also observed that the deposition rate is increasing with the increase of deposition power; it shows linear behavior with deposition power.Sputtered Fe/Nb multilayers were prepared with Nb thicknesses dNb of 35 A and with Fe thicknesses dFe of 35 A and sputtered Fe/Nb/Fe trilayers was deposited with Nb thicknesses dNb in the range 50 A and with Fe thicknesses dFe in the range 120 A, respectively using high power impulse magnetron sputtering technique. X-ray reflectivity (XRR) measured patterns revealed the high quality of the film structure with a low surface and interface roughness. Nb thin films synthesized with Nb thicknesses dNb in the range 150-700 A using conventional direct-current magnetron sputtering (CMS) have been compared with those made by high power impulse magnetron sputtering (HIPIMS) operated at the same average power by means of XRR. The obtained XRR patterns were fitted using the Parratt32 software. It was observed that films grown by HIPIMS method have a higher density and interface roughness than that grown by the CMS method. It was also observed that the deposition rate is increasing with the increase of deposition powe...
{"title":"Deposition of Fe/Nb multilayers and Fe/Nb/Fe trilayers using HIPIMS: XRR measurements for interface diffusion study","authors":"D. Kumar, M. Gupta, D. Kumar, A. Singh","doi":"10.1063/1.5122434","DOIUrl":"https://doi.org/10.1063/1.5122434","url":null,"abstract":"Sputtered Fe/Nb multilayers were prepared with Nb thicknesses dNb of 35 A and with Fe thicknesses dFe of 35 A and sputtered Fe/Nb/Fe trilayers was deposited with Nb thicknesses dNb in the range 50 A and with Fe thicknesses dFe in the range 120 A, respectively using high power impulse magnetron sputtering technique. X-ray reflectivity (XRR) measured patterns revealed the high quality of the film structure with a low surface and interface roughness. Nb thin films synthesized with Nb thicknesses dNb in the range 150-700 A using conventional direct-current magnetron sputtering (CMS) have been compared with those made by high power impulse magnetron sputtering (HIPIMS) operated at the same average power by means of XRR. The obtained XRR patterns were fitted using the Parratt32 software. It was observed that films grown by HIPIMS method have a higher density and interface roughness than that grown by the CMS method. It was also observed that the deposition rate is increasing with the increase of deposition power; it shows linear behavior with deposition power.Sputtered Fe/Nb multilayers were prepared with Nb thicknesses dNb of 35 A and with Fe thicknesses dFe of 35 A and sputtered Fe/Nb/Fe trilayers was deposited with Nb thicknesses dNb in the range 50 A and with Fe thicknesses dFe in the range 120 A, respectively using high power impulse magnetron sputtering technique. X-ray reflectivity (XRR) measured patterns revealed the high quality of the film structure with a low surface and interface roughness. Nb thin films synthesized with Nb thicknesses dNb in the range 150-700 A using conventional direct-current magnetron sputtering (CMS) have been compared with those made by high power impulse magnetron sputtering (HIPIMS) operated at the same average power by means of XRR. The obtained XRR patterns were fitted using the Parratt32 software. It was observed that films grown by HIPIMS method have a higher density and interface roughness than that grown by the CMS method. It was also observed that the deposition rate is increasing with the increase of deposition powe...","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"150 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74908026","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}
N. Ranga, Ekta Poonia, C. Mariappan, S. Duhan, Suresh Kumar
In this research work, we prepared a new zinc doped bioglass composite by a sol-gel route. The bioactivity evaluation was done by soaking the sample in simulated body fluids for different time periods. Formation of hydroxyapatite layer on the surface of the bioglass was confirmed by the FTIR spectroscopy, X-ray diffraction, Field emission scanning electron microscope (FESEM) with energy dispersive spectroscopy after immersion of the prepared glass powders in simulated body fluid (SBF) for time durations varying between 2 and 21 days. After the in-vitro study FTIR results show the presence of a phosphate group. Structural morphology explains the nano size of the bioglass powders using High-Resolution Transmission Electron Microscopy (HRTEM) and study of the hydroxyapatite was done by using FESEM. Two bacteria E-coli and S-aureus were used to study the antimicrobial effects on the prepared bioglass and both the bacteria shows the antimicrobial effects and effective to kill the microorganisms.In this research work, we prepared a new zinc doped bioglass composite by a sol-gel route. The bioactivity evaluation was done by soaking the sample in simulated body fluids for different time periods. Formation of hydroxyapatite layer on the surface of the bioglass was confirmed by the FTIR spectroscopy, X-ray diffraction, Field emission scanning electron microscope (FESEM) with energy dispersive spectroscopy after immersion of the prepared glass powders in simulated body fluid (SBF) for time durations varying between 2 and 21 days. After the in-vitro study FTIR results show the presence of a phosphate group. Structural morphology explains the nano size of the bioglass powders using High-Resolution Transmission Electron Microscopy (HRTEM) and study of the hydroxyapatite was done by using FESEM. Two bacteria E-coli and S-aureus were used to study the antimicrobial effects on the prepared bioglass and both the bacteria shows the antimicrobial effects and effective to kill the microorganisms.
{"title":"Zinc doped calcium phosphosilicatebioglass: Study of in-vitro bioactivity and antimicrobial behavior","authors":"N. Ranga, Ekta Poonia, C. Mariappan, S. Duhan, Suresh Kumar","doi":"10.1063/1.5122405","DOIUrl":"https://doi.org/10.1063/1.5122405","url":null,"abstract":"In this research work, we prepared a new zinc doped bioglass composite by a sol-gel route. The bioactivity evaluation was done by soaking the sample in simulated body fluids for different time periods. Formation of hydroxyapatite layer on the surface of the bioglass was confirmed by the FTIR spectroscopy, X-ray diffraction, Field emission scanning electron microscope (FESEM) with energy dispersive spectroscopy after immersion of the prepared glass powders in simulated body fluid (SBF) for time durations varying between 2 and 21 days. After the in-vitro study FTIR results show the presence of a phosphate group. Structural morphology explains the nano size of the bioglass powders using High-Resolution Transmission Electron Microscopy (HRTEM) and study of the hydroxyapatite was done by using FESEM. Two bacteria E-coli and S-aureus were used to study the antimicrobial effects on the prepared bioglass and both the bacteria shows the antimicrobial effects and effective to kill the microorganisms.In this research work, we prepared a new zinc doped bioglass composite by a sol-gel route. The bioactivity evaluation was done by soaking the sample in simulated body fluids for different time periods. Formation of hydroxyapatite layer on the surface of the bioglass was confirmed by the FTIR spectroscopy, X-ray diffraction, Field emission scanning electron microscope (FESEM) with energy dispersive spectroscopy after immersion of the prepared glass powders in simulated body fluid (SBF) for time durations varying between 2 and 21 days. After the in-vitro study FTIR results show the presence of a phosphate group. Structural morphology explains the nano size of the bioglass powders using High-Resolution Transmission Electron Microscopy (HRTEM) and study of the hydroxyapatite was done by using FESEM. Two bacteria E-coli and S-aureus were used to study the antimicrobial effects on the prepared bioglass and both the bacteria shows the antimicrobial effects and effective to kill the microorganisms.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74373121","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}
K. R. Aranganayagam, S. Senthilkumaar, S. Nithya, K. Boopathi, J. Joy
Pure ZnO and (Ru-Mn)ZnO, (RuxMnyZn(1-y)-xO, x=0.01; y=0.01, 0.02 and 0.03) were synthesized by sol-gel method. The effects of codoping on structural, morphological, catalytic and antibacterial activities were studied. From the physico chemical characterizations, it is found that the average particle sizes of the synthesized catalysts are between 20 and 30nm and exhibits a single phase nanostructures. The aerobic oxidative organic transformations of alcohols (benzyl alcohol, cyclo hexanol, cinnmyl alcohol, n-propanol, n-butanol) in liquid phase with 30% H2O2 as co-oxidant were tested against new ternary (Ru-Mn)ZnO metal oxides. (Ru-Mn)ZnO catalysts shows good percentage yield with compared to pure ZnO. In order to examine the bacterial activity, in vitro antibacterial screenings for the metal oxides were tested against human pathogenic Gram +ve (S. aureus) and Gram –ve (E. Coli).Pure ZnO and (Ru-Mn)ZnO, (RuxMnyZn(1-y)-xO, x=0.01; y=0.01, 0.02 and 0.03) were synthesized by sol-gel method. The effects of codoping on structural, morphological, catalytic and antibacterial activities were studied. From the physico chemical characterizations, it is found that the average particle sizes of the synthesized catalysts are between 20 and 30nm and exhibits a single phase nanostructures. The aerobic oxidative organic transformations of alcohols (benzyl alcohol, cyclo hexanol, cinnmyl alcohol, n-propanol, n-butanol) in liquid phase with 30% H2O2 as co-oxidant were tested against new ternary (Ru-Mn)ZnO metal oxides. (Ru-Mn)ZnO catalysts shows good percentage yield with compared to pure ZnO. In order to examine the bacterial activity, in vitro antibacterial screenings for the metal oxides were tested against human pathogenic Gram +ve (S. aureus) and Gram –ve (E. Coli).
{"title":"Ruthenium supported ZnO catalyst for aerobic oxidative transformation of alcohols and its antibacterial studies","authors":"K. R. Aranganayagam, S. Senthilkumaar, S. Nithya, K. Boopathi, J. Joy","doi":"10.1063/1.5122356","DOIUrl":"https://doi.org/10.1063/1.5122356","url":null,"abstract":"Pure ZnO and (Ru-Mn)ZnO, (RuxMnyZn(1-y)-xO, x=0.01; y=0.01, 0.02 and 0.03) were synthesized by sol-gel method. The effects of codoping on structural, morphological, catalytic and antibacterial activities were studied. From the physico chemical characterizations, it is found that the average particle sizes of the synthesized catalysts are between 20 and 30nm and exhibits a single phase nanostructures. The aerobic oxidative organic transformations of alcohols (benzyl alcohol, cyclo hexanol, cinnmyl alcohol, n-propanol, n-butanol) in liquid phase with 30% H2O2 as co-oxidant were tested against new ternary (Ru-Mn)ZnO metal oxides. (Ru-Mn)ZnO catalysts shows good percentage yield with compared to pure ZnO. In order to examine the bacterial activity, in vitro antibacterial screenings for the metal oxides were tested against human pathogenic Gram +ve (S. aureus) and Gram –ve (E. Coli).Pure ZnO and (Ru-Mn)ZnO, (RuxMnyZn(1-y)-xO, x=0.01; y=0.01, 0.02 and 0.03) were synthesized by sol-gel method. The effects of codoping on structural, morphological, catalytic and antibacterial activities were studied. From the physico chemical characterizations, it is found that the average particle sizes of the synthesized catalysts are between 20 and 30nm and exhibits a single phase nanostructures. The aerobic oxidative organic transformations of alcohols (benzyl alcohol, cyclo hexanol, cinnmyl alcohol, n-propanol, n-butanol) in liquid phase with 30% H2O2 as co-oxidant were tested against new ternary (Ru-Mn)ZnO metal oxides. (Ru-Mn)ZnO catalysts shows good percentage yield with compared to pure ZnO. In order to examine the bacterial activity, in vitro antibacterial screenings for the metal oxides were tested against human pathogenic Gram +ve (S. aureus) and Gram –ve (E. Coli).","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81856751","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}
Thin films of thermochromic VO2 were stabilized on Si substrate at different deposition parameters by sputtering method and their structural characterization was carried out using X-ray diffraction technique. Sputtering in Ar/O2 gas mixture has resulted in mixed phase growth of VO2. On the other hand, sputtering with Aronly has resulted in single phase growth of VO2 thin films. Monoclinic to rutile structural phase transition was studied in the grown VO2 thin film samples by performing the temperature dependent grazing incidence X-ray diffraction (GIXRD) measurements.
{"title":"Thermochromic VO2 thin films: Growth and characterization","authors":"Manish Kumar, S. Rani, H. Lee","doi":"10.1063/1.5122435","DOIUrl":"https://doi.org/10.1063/1.5122435","url":null,"abstract":"Thin films of thermochromic VO2 were stabilized on Si substrate at different deposition parameters by sputtering method and their structural characterization was carried out using X-ray diffraction technique. Sputtering in Ar/O2 gas mixture has resulted in mixed phase growth of VO2. On the other hand, sputtering with Aronly has resulted in single phase growth of VO2 thin films. Monoclinic to rutile structural phase transition was studied in the grown VO2 thin film samples by performing the temperature dependent grazing incidence X-ray diffraction (GIXRD) measurements.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80839390","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 remarkable stability and characteristic properties of N-Heterocyclic carbenes have made them universal ligands in organometallic and inorganic coordination chemistry. They are major topic of interest for scientific minds these days. Because of their strong electron donating capabilities, they are considered as most attractive alternatives over conventional phosphine ligands. They are also known to have wide range of applications in organic transformations. Infact, for olefin metathesis there are no better catalyst than NHC-ruthenium complexes. With the advent of NHCs, a revolutionary turning point in organometallic catalysis is emerging.The remarkable stability and characteristic properties of N-Heterocyclic carbenes have made them universal ligands in organometallic and inorganic coordination chemistry. They are major topic of interest for scientific minds these days. Because of their strong electron donating capabilities, they are considered as most attractive alternatives over conventional phosphine ligands. They are also known to have wide range of applications in organic transformations. Infact, for olefin metathesis there are no better catalyst than NHC-ruthenium complexes. With the advent of NHCs, a revolutionary turning point in organometallic catalysis is emerging.
n -杂环羰基化合物以其优异的稳定性和独特的性质成为金属有机配位化学和无机配位化学中的通用配体。它们是这些天科学家们感兴趣的主要话题。由于具有很强的供电子能力，它们被认为是传统膦配体中最有吸引力的替代品。它们在有机转化中也有广泛的应用。事实上，没有比nhc -钌配合物更适合烯烃复分解的催化剂了。随着NHCs的出现，有机金属催化的一个革命性转折点正在出现。n -杂环羰基化合物以其优异的稳定性和独特的性质成为金属有机配位化学和无机配位化学中的通用配体。它们是这些天科学家们感兴趣的主要话题。由于具有很强的供电子能力，它们被认为是传统膦配体中最有吸引力的替代品。它们在有机转化中也有广泛的应用。事实上，没有比nhc -钌配合物更适合烯烃复分解的催化剂了。随着NHCs的出现，有机金属催化的一个革命性转折点正在出现。
{"title":"N-heterocyclic carbenes-A revolutionary turning point in organometallic catalysis","authors":"Ishita Asrani, Anita Tanwar","doi":"10.1063/1.5122631","DOIUrl":"https://doi.org/10.1063/1.5122631","url":null,"abstract":"The remarkable stability and characteristic properties of N-Heterocyclic carbenes have made them universal ligands in organometallic and inorganic coordination chemistry. They are major topic of interest for scientific minds these days. Because of their strong electron donating capabilities, they are considered as most attractive alternatives over conventional phosphine ligands. They are also known to have wide range of applications in organic transformations. Infact, for olefin metathesis there are no better catalyst than NHC-ruthenium complexes. With the advent of NHCs, a revolutionary turning point in organometallic catalysis is emerging.The remarkable stability and characteristic properties of N-Heterocyclic carbenes have made them universal ligands in organometallic and inorganic coordination chemistry. They are major topic of interest for scientific minds these days. Because of their strong electron donating capabilities, they are considered as most attractive alternatives over conventional phosphine ligands. They are also known to have wide range of applications in organic transformations. Infact, for olefin metathesis there are no better catalyst than NHC-ruthenium complexes. With the advent of NHCs, a revolutionary turning point in organometallic catalysis is emerging.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"135 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80376025","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}
Nanotechnology is used in various fields of applied sciences such as chemists, physicists, biologists, medical doctors and engineers. Nanotechnology has been provisionally defined as relating to materials, systems and processes which operate at a scale of 100 nm or less. In the agricultural sector, nanotech research and development is likely to facilitate and frame the next stage of development of genetically modified crops, animal production inputs, chemical pesticides and precision farming techniques. Pesticides are used on large scale and most of the pesticides are resistant to biodegradation and are found to be carcinogenic in nature even at trace levels. Conventional methods of pesticide removal are disadvantageous due to their inherent time consumption or expensiveness. Nanoparticles alleviate both of these drawbacks and hence, they can be effectively utilized for the mineralization of pesticides. Nanoparticles of defined concentrations could be successfully used for the control of various plant dis...
{"title":"Role and effects of nanotechnology used in pesticides and agriculture field","authors":"Anita Tanwar, Sushil","doi":"10.1063/1.5122581","DOIUrl":"https://doi.org/10.1063/1.5122581","url":null,"abstract":"Nanotechnology is used in various fields of applied sciences such as chemists, physicists, biologists, medical doctors and engineers. Nanotechnology has been provisionally defined as relating to materials, systems and processes which operate at a scale of 100 nm or less. In the agricultural sector, nanotech research and development is likely to facilitate and frame the next stage of development of genetically modified crops, animal production inputs, chemical pesticides and precision farming techniques. Pesticides are used on large scale and most of the pesticides are resistant to biodegradation and are found to be carcinogenic in nature even at trace levels. Conventional methods of pesticide removal are disadvantageous due to their inherent time consumption or expensiveness. Nanoparticles alleviate both of these drawbacks and hence, they can be effectively utilized for the mineralization of pesticides. Nanoparticles of defined concentrations could be successfully used for the control of various plant dis...","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78655991","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 report on synthesis of Graphene like nano flake (GNF) by combustion of sugarcane waste using chemical vapor deposition technique. The obtained material was purified by chemical and annealing process. The synthesized and post treated samples were studied using Raman, optical spectroscopy and electron microscopy. In Raman spectroscopy, three prominent peaks have been observed and analyzed for their emergence. In microscopy studies, the area of the GNF were observed to be varied in the range of 5 to 50 µm2 compounded with low degree of crystallinity, warps, and wrinkles details are presented.
{"title":"Synthesis and characterization of graphene like nano flakes(GNF) using chemical vapor deposition","authors":"Shamal L. Chinke, R. Gawade, P. Alegaonkar","doi":"10.1063/1.5122383","DOIUrl":"https://doi.org/10.1063/1.5122383","url":null,"abstract":"We report on synthesis of Graphene like nano flake (GNF) by combustion of sugarcane waste using chemical vapor deposition technique. The obtained material was purified by chemical and annealing process. The synthesized and post treated samples were studied using Raman, optical spectroscopy and electron microscopy. In Raman spectroscopy, three prominent peaks have been observed and analyzed for their emergence. In microscopy studies, the area of the GNF were observed to be varied in the range of 5 to 50 µm2 compounded with low degree of crystallinity, warps, and wrinkles details are presented.","PeriodicalId":7262,"journal":{"name":"ADVANCES IN BASIC SCIENCE (ICABS 2019)","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89939797","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}
Risks to ecosystem vary significantly depending upon the nature and extend of exposure to hazardous chemicals. Stringent rules laid by various Environment protection agencies distinguish risks on the basis the utility and runaway hazards. Benzoic acid and 4-Nitro benzoic acid are widely used in food preservatives, cosmetic, and pharmaceutical industries. Anthropogenic releases of such chemicals into the environment are predominantly into water and soil. In the present study, advance oxidative processes namely UV/H2O2 and dark and UV Fenton, solar Fenton were investigated for the degradation of benzoic acid and 4-Nitrobenzoic acid (4-NBA) in lab-scale photoreactor. The process being highly dependent on experimental parameters, degradation studies were carried out at different [H2O2]/[BA], [H2O2]/[4-NBA] molar ratios and pH values in order to establish optimum experimental conditions for the processes studied. The obtained results show that Fenton process works effectively at acidic conditions and has much higher oxidation rate as compared with the UV/H2O2 process in case of BA, whereas for 4NBA Fenton like process works more effective. Oxidative degradation of contaminants by solar Fenton process was having highest degradation rate for Fenton process than for Fenton like process in both BA and 4-NBA. The optimum degradation conditions for 4-NBA by the photo Fenton like process are at pH 3.5, [Fe3+] at 4 ppm with molar ratio of 1.5 for [H2O2]/[4-NBA].The optimum degradation conditions for BA by the photo Fenton process are at pH 3.5, [Fe2+] at 7 ppm with molar ratio of 5.0 for [H2O2]/[4-BA].
{"title":"Advanced oxidative degradation of benzoic acid and 4-nitro benzoic acid–A comparative study","authors":"B. D. Deshpande, P. Agrawal, M. Yenkie","doi":"10.1063/1.5122650","DOIUrl":"https://doi.org/10.1063/1.5122650","url":null,"abstract":"Risks to ecosystem vary significantly depending upon the nature and extend of exposure to hazardous chemicals. Stringent rules laid by various Environment protection agencies distinguish risks on the basis the utility and runaway hazards. Benzoic acid and 4-Nitro benzoic acid are widely used in food preservatives, cosmetic, and pharmaceutical industries. Anthropogenic releases of such chemicals into the environment are predominantly into water and soil. In the present study, advance oxidative processes namely UV/H2O2 and dark and UV Fenton, solar Fenton were investigated for the degradation of benzoic acid and 4-Nitrobenzoic acid (4-NBA) in lab-scale photoreactor. The process being highly dependent on experimental parameters, degradation studies were carried out at different [H2O2]/[BA], [H2O2]/[4-NBA] molar ratios and pH values in order to establish optimum experimental conditions for the processes studied. The obtained results show that Fenton process works effectively at acidic conditions and has much higher oxidation rate as compared with the UV/H2O2 process in case of BA, whereas for 4NBA Fenton like process works more effective. Oxidative degradation of contaminants by solar Fenton process was having highest degradation rate for Fenton process than for Fenton like process in both BA and 4-NBA. The optimum degradation conditions for 4-NBA by the photo Fenton like process are at pH 3.5, [Fe3+] at 4 ppm with molar ratio of 1.5 for [H2O2]/[4-NBA].The optimum degradation conditions for BA by the photo Fenton process are at pH 3.5, [Fe2+] at 7 ppm with molar ratio of 5.0 for [H2O2]/[4-BA].","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":"78689920","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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