Pub Date : 2022-05-26DOI: 10.30799/jnst.334.22080201
G. Vanitha, R. Manikandan, K. Sathiyamoorthi, B. Dhinakaran
The present review targets the comparative biogenic synthesis and mechanisms of nanoparticles using various plant-parts extracts and various solutions of strong electrolytic metal salts. The metal salts are AgNO3, Zn(OAc)2, Zn(NO3)2, ZnSO4, CuSO4.5H2O, Cu(NO3)2, Cu(OAc)2, CuCl2, HAuCl4.3H2O, Mg(NO3)2, Mg(OAc)2, TiO(OH)2, Fe(NO3)2.6H2O, FeCl3.6H2O, FeCl2.4H2O, Al(NO3)2, BaCl2·2H2O, Bi(NO3)2, PdCl2, H2PtCl6.6H2O, NaHSeO3, Na2SeO3, Ca(NO3)2.4H2O, ZrOCl2.4H2O, Zr(OAc)4, NiCl2, NiSO4.6H2O, Ni(NO3)2, VCl2, Co(NO3)2 6H2O, CoCl2, Hg(OAc)2, Mn(OAc)2, (NH4)6Mo7O24, Sr(NO3)2, SnCl2.2H2O, Na2S2O3.5H2O, K2Cr2O7, Cr(NO)3.9H2O and Pb(NO3)2. These salts are soluble to produce to highly active positive metal ions in deionised water. These ions are effectively nucleated in the plant constituents. The plant acts akin to a huge ‘‘bio-laboratory” comprising of leaves, seeds, steam, root, sprout, fruits, latex, parks, fruits peel, fruits, juices. etc… which are composed of biomolecules and phytoconstituents. These naturally happening biomolecules and phytoconstituents have been recognized to play an energetic role in the formation of nanoparticles with discrete shapes and sizes thus acting as a pouring force for the manipulative of greener, safe and environmentally benign protocols for the synthesis of nanoparticles.
{"title":"Review on Green Synthesis of Nanoparticles using Various Strong Electrolytic Metal Solutions Mediated by Various Plant Parts","authors":"G. Vanitha, R. Manikandan, K. Sathiyamoorthi, B. Dhinakaran","doi":"10.30799/jnst.334.22080201","DOIUrl":"https://doi.org/10.30799/jnst.334.22080201","url":null,"abstract":"The present review targets the comparative biogenic synthesis and mechanisms of nanoparticles using various plant-parts extracts and various solutions of strong electrolytic metal salts. The metal salts are AgNO3, Zn(OAc)2, Zn(NO3)2, ZnSO4, CuSO4.5H2O, Cu(NO3)2, Cu(OAc)2, CuCl2, HAuCl4.3H2O, Mg(NO3)2, Mg(OAc)2, TiO(OH)2, Fe(NO3)2.6H2O, FeCl3.6H2O, FeCl2.4H2O, Al(NO3)2, BaCl2·2H2O, Bi(NO3)2, PdCl2, H2PtCl6.6H2O, NaHSeO3, Na2SeO3, Ca(NO3)2.4H2O, ZrOCl2.4H2O, Zr(OAc)4, NiCl2, NiSO4.6H2O, Ni(NO3)2, VCl2, Co(NO3)2 6H2O, CoCl2, Hg(OAc)2, Mn(OAc)2, (NH4)6Mo7O24, Sr(NO3)2, SnCl2.2H2O, Na2S2O3.5H2O, K2Cr2O7, Cr(NO)3.9H2O and Pb(NO3)2. These salts are soluble to produce to highly active positive metal ions in deionised water. These ions are effectively nucleated in the plant constituents. The plant acts akin to a huge ‘‘bio-laboratory” comprising of leaves, seeds, steam, root, sprout, fruits, latex, parks, fruits peel, fruits, juices. etc… which are composed of biomolecules and phytoconstituents. These naturally happening biomolecules and phytoconstituents have been recognized to play an energetic role in the formation of nanoparticles with discrete shapes and sizes thus acting as a pouring force for the manipulative of greener, safe and environmentally benign protocols for the synthesis of nanoparticles.","PeriodicalId":187599,"journal":{"name":"Journal of Nanoscience and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132203125","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}
Pub Date : 2022-02-23DOI: 10.30799/jnst.333.22080101
Vishnu Kiran Manam, S. Murugesan
Diabetes mellitus is a chronic disease of the endocrine system characterized by elevated blood glucose levels, and disturbances in carbohydrate, fat and, protein metabolism. In the present study, the anti-diabetic efficacy of biosynthesized silver nanoparticles from marine brown seaweed Colpomenia sinuosa has been evaluated. The anti-diabetic effect of the silver nanoparticles biosynthesized from the Colpomenia sinuosa was assessed by inducing diabetes in the experimental Wistar albino rats through Alloxan monohydrate, a chemical that ultimately results in hyperglycemia (increase in the fasting blood sugar level) at a dosage of 50 mg/kg body weight given orally for about 28 days. The outcome of treatment with silver nanoparticles (50 mg/Kg i.p.) biosynthesized from Colpomenia sinuosa, were estimated using various biochemical parameters. The fasting blood glucose levels have reduced in the affected animals to near-normal levels. The retention of the level of the enzymes involved in diabetes, hematological analysis, decrease in the levels of total cholesterol, triglycerides, low-density lipoprotein, and phospholipids in the silver nanoparticles treated animals compared to the levels in normal control animals, exhibited significant anti-diabetic activity as compared to glipizide.
{"title":"In-vivo Anti-Diabetic Efficacy of Silver Nanoparticles from Marine Brown Seaweed Colpomenia sinuosa on Alloxan Stimulated Hyperglycemic Activity in Wistar Albino Rats","authors":"Vishnu Kiran Manam, S. Murugesan","doi":"10.30799/jnst.333.22080101","DOIUrl":"https://doi.org/10.30799/jnst.333.22080101","url":null,"abstract":"Diabetes mellitus is a chronic disease of the endocrine system characterized by elevated blood glucose levels, and disturbances in carbohydrate, fat and, protein metabolism. In the present study, the anti-diabetic efficacy of biosynthesized silver nanoparticles from marine brown seaweed Colpomenia sinuosa has been evaluated. The anti-diabetic effect of the silver nanoparticles biosynthesized from the Colpomenia sinuosa was assessed by inducing diabetes in the experimental Wistar albino rats through Alloxan monohydrate, a chemical that ultimately results in hyperglycemia (increase in the fasting blood sugar level) at a dosage of 50 mg/kg body weight given orally for about 28 days. The outcome of treatment with silver nanoparticles (50 mg/Kg i.p.) biosynthesized from Colpomenia sinuosa, were estimated using various biochemical parameters. The fasting blood glucose levels have reduced in the affected animals to near-normal levels. The retention of the level of the enzymes involved in diabetes, hematological analysis, decrease in the levels of total cholesterol, triglycerides, low-density lipoprotein, and phospholipids in the silver nanoparticles treated animals compared to the levels in normal control animals, exhibited significant anti-diabetic activity as compared to glipizide.","PeriodicalId":187599,"journal":{"name":"Journal of Nanoscience and Technology","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122096821","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}
Pub Date : 2021-12-23DOI: 10.30799/jnst.328.21070401
M. J. Pawar, V. Nimbalkar, A. D. Khajone, S. Deshmukh
Ag doped TiO2 nanoparticles with different metallic content (0.0, 0.1, 0.15 and 0.2 wt.%) were prepared by using EDTA-Glycol method. For the sake of comparison blank TiO2 sample is also prepared using same method. All the samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). X-ray diffraction technique revealed that Ag-doped TiO2 has anatase structure and as the concentration of Ag increases the particle size will get decreases. The morphologies of TiO2 samples are influenced by doping Ag as shown by SEM images. The present work is mainly focused on the enhancement of photocatalytic reactivity of as synthesized samples by the photodegradation of 4BS under visible light irradiation using a LED lamp of (15 W) as a light source. A 96.3% of photodegradation of 4BS dye was achieved by utilizing 1 g/L of Ag-doped TiO2 at pH 6 for 100 min.
{"title":"Ag-Doped TiO2: Synthesis, Characterization and Photodegradation of 4BS Dye","authors":"M. J. Pawar, V. Nimbalkar, A. D. Khajone, S. Deshmukh","doi":"10.30799/jnst.328.21070401","DOIUrl":"https://doi.org/10.30799/jnst.328.21070401","url":null,"abstract":"Ag doped TiO2 nanoparticles with different metallic content (0.0, 0.1, 0.15 and 0.2 wt.%) were prepared by using EDTA-Glycol method. For the sake of comparison blank TiO2 sample is also prepared using same method. All the samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). X-ray diffraction technique revealed that Ag-doped TiO2 has anatase structure and as the concentration of Ag increases the particle size will get decreases. The morphologies of TiO2 samples are influenced by doping Ag as shown by SEM images. The present work is mainly focused on the enhancement of photocatalytic reactivity of as synthesized samples by the photodegradation of 4BS under visible light irradiation using a LED lamp of (15 W) as a light source. A 96.3% of photodegradation of 4BS dye was achieved by utilizing 1 g/L of Ag-doped TiO2 at pH 6 for 100 min.","PeriodicalId":187599,"journal":{"name":"Journal of Nanoscience and Technology","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116308132","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}
Pub Date : 2021-12-13DOI: 10.30799/jnst.330.21070301
K. Pakiyaraj, V. Kirthika
In recent years, a transparent conducting oxide (TCO) SnO2 semiconductor have gained considerable attention due to their potential application in gas sensors. More number of studies on TCO oxide have focused on the semiconducting metal oxides in which an intensive argument is that the transparent semiconductors. The SnO2 thin films were deposited at 400 °C and then annealed at 500 °C and 600 °C and its structural, optical and electrical properties were characterized. The doping stoichiometric ratio was maintained as 4% and the resulting solution was sprayed on glass substrate which was kept at nozzle distance of 25 cm and the spray rate was 10 mL/min. The prepared pure SnO2 thin films have been characterized by different methods such as XRD, FESEM, UV-Vis NIR and EDAX analyses. It was found that the nanocrystalline SnO2 grains possesses structural features of the tetragonal rutile structure. Hence the prepared thin films are justified to be nanocrystalline and also the mean crystalline size decreased with respect to annealing temperature.
{"title":"Annealing Effect on Nanocrystalline SnO2 Thin Films Prepared by Spray Pyrolysis Technique","authors":"K. Pakiyaraj, V. Kirthika","doi":"10.30799/jnst.330.21070301","DOIUrl":"https://doi.org/10.30799/jnst.330.21070301","url":null,"abstract":"In recent years, a transparent conducting oxide (TCO) SnO2 semiconductor have gained considerable attention due to their potential application in gas sensors. More number of studies on TCO oxide have focused on the semiconducting metal oxides in which an intensive argument is that the transparent semiconductors. The SnO2 thin films were deposited at 400 °C and then annealed at 500 °C and 600 °C and its structural, optical and electrical properties were characterized. The doping stoichiometric ratio was maintained as 4% and the resulting solution was sprayed on glass substrate which was kept at nozzle distance of 25 cm and the spray rate was 10 mL/min. The prepared pure SnO2 thin films have been characterized by different methods such as XRD, FESEM, UV-Vis NIR and EDAX analyses. It was found that the nanocrystalline SnO2 grains possesses structural features of the tetragonal rutile structure. Hence the prepared thin films are justified to be nanocrystalline and also the mean crystalline size decreased with respect to annealing temperature.","PeriodicalId":187599,"journal":{"name":"Journal of Nanoscience and Technology","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131541479","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}
Pub Date : 2020-12-27DOI: 10.30799/jnst.314.20060402
Pranav Dave, Jyoti Sharma
In this emerging technology world, the counterfeit of products are increasing due to raising the economy of industry. Counterfeiting is as old as the human desire to create objects of value. There are number of products, which can be easily duplicated by simple processes and the product is accurate and precise. Counterfeit is a problem of product security, the rise and affects every product category from consumer goods to medicines and spare parts. Products can furthermore contain non-active or even toxic- ingredients. So, luminescent materials are useful to detect different counterfeit products at different wavelength. The carbon dots-lanthanide composite based gel formulation is used to coat on different subtract and according to the process their different characterization part for the prevention of counterfeit problems. Carbon dots-lanthanide composites are basically easy to synthesis and they have fluorescent property, which can help to make product unique and diverse. With help of UV chamber, the carbon dots-lanthanide composites are easily detected at some particular wavelength. So by using this property, the gel formulation can be fabricated to coat on different subtract and characterize different surface morphology for the future precepts. UV-Vis- spectrophotometer was utilized to differentiate optical properties and fluorospectrometer was exploited to differentiate fluorescent properties of carbon dots, carbon dots-lanthanide composite and CDs-lanthanide based fluorescent ink. FT-IR and viscometer were used characterized other properties of carbon dots-lanthanide based fluorescent ink. This research article is the revised article of one step synthesis of carbon dots based smart fluorescent security ink.
{"title":"Carbon Dot-Lanthanide Composite Based Smart Luminescent Anticounterfeiting Material","authors":"Pranav Dave, Jyoti Sharma","doi":"10.30799/jnst.314.20060402","DOIUrl":"https://doi.org/10.30799/jnst.314.20060402","url":null,"abstract":"In this emerging technology world, the counterfeit of products are increasing due to raising the economy of industry. Counterfeiting is as old as the human desire to create objects of value. There are number of products, which can be easily duplicated by simple processes and the product is accurate and precise. Counterfeit is a problem of product security, the rise and affects every product category from consumer goods to medicines and spare parts. Products can furthermore contain non-active or even toxic- ingredients. So, luminescent materials are useful to detect different counterfeit products at different wavelength. The carbon dots-lanthanide composite based gel formulation is used to coat on different subtract and according to the process their different characterization part for the prevention of counterfeit problems. Carbon dots-lanthanide composites are basically easy to synthesis and they have fluorescent property, which can help to make product unique and diverse. With help of UV chamber, the carbon dots-lanthanide composites are easily detected at some particular wavelength. So by using this property, the gel formulation can be fabricated to coat on different subtract and characterize different surface morphology for the future precepts. UV-Vis- spectrophotometer was utilized to differentiate optical properties and fluorospectrometer was exploited to differentiate fluorescent properties of carbon dots, carbon dots-lanthanide composite and CDs-lanthanide based fluorescent ink. FT-IR and viscometer were used characterized other properties of carbon dots-lanthanide based fluorescent ink. This research article is the revised article of one step synthesis of carbon dots based smart fluorescent security ink.","PeriodicalId":187599,"journal":{"name":"Journal of Nanoscience and Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132445914","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}
Pub Date : 2020-09-26DOI: 10.30799/JNST.310.20060304
M. Alsawat
Gadolinium-doped TiO2 NPs, namely TiO2-Gd1.0 and TiO2-Gd6.0 have been synthesized using two different atomic concentrations of gadolinium(III) nitrate hexahydrate in presence of titanium(IV) tert-butoxide as a titanium precursor and dimethyl sulfoxide as a solvent. The structure and morphology of these NPs have been characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric-differential thermal analysis (TGA-DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The two synthesized TiO2-Gd1.0 and TiO2-Gd6.0 were tested as electrocatalysts for hydrogen evolution reaction (HER) in an acidic electrolyte (0.5 M H2SO4) based on linear sweep voltammetry (LSV) measurements. LSV data were fitted to Tafel equation and the various electrochemical parameters describing the HER kinetics were evaluated and discussed. Results demonstrate that the kinetics of the HER on the surface of TiO2 NPs significantly enhanced upon doping it with Gd3+, proportionally to the atomic concentration of the Gd3+ cations in the TiO2 NPs.
采用两种不同原子浓度的六水硝酸钆，叔丁醇钛为钛前驱体，二甲亚砜为溶剂，合成了掺杂钆的TiO2 NPs，即TiO2- gd1.0和TiO2- gd6.0。利用傅里叶红外光谱(FTIR)、热重差热分析(TGA-DTA)、x射线衍射(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)对NPs的结构和形貌进行了表征。采用线性扫描伏安法(LSV)测试了两种合成的TiO2-Gd1.0和TiO2-Gd6.0在酸性电解质(0.5 M H2SO4)中作为析氢反应(HER)的电催化剂。将LSV数据拟合到Tafel方程，并对描述HER动力学的各种电化学参数进行了评价和讨论。结果表明，掺杂Gd3+后，TiO2 NPs表面HER的动力学显著增强，且与TiO2 NPs中Gd3+离子的原子浓度成正比。
{"title":"Enhanced Acidic Hydrogen Evolution on TiO2-Doped Gadolinium Electrocatalysts","authors":"M. Alsawat","doi":"10.30799/JNST.310.20060304","DOIUrl":"https://doi.org/10.30799/JNST.310.20060304","url":null,"abstract":"Gadolinium-doped TiO2 NPs, namely TiO2-Gd1.0 and TiO2-Gd6.0 have been synthesized using two different atomic concentrations of gadolinium(III) nitrate hexahydrate in presence of titanium(IV) tert-butoxide as a titanium precursor and dimethyl sulfoxide as a solvent. The structure and morphology of these NPs have been characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric-differential thermal analysis (TGA-DTA), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The two synthesized TiO2-Gd1.0 and TiO2-Gd6.0 were tested as electrocatalysts for hydrogen evolution reaction (HER) in an acidic electrolyte (0.5 M H2SO4) based on linear sweep voltammetry (LSV) measurements. LSV data were fitted to Tafel equation and the various electrochemical parameters describing the HER kinetics were evaluated and discussed. Results demonstrate that the kinetics of the HER on the surface of TiO2 NPs significantly enhanced upon doping it with Gd3+, proportionally to the atomic concentration of the Gd3+ cations in the TiO2 NPs.","PeriodicalId":187599,"journal":{"name":"Journal of Nanoscience and Technology","volume":"190 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131783718","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}
Pub Date : 2019-11-11DOI: 10.30799/jnst.287.19050507
R. V. Patil, R. Damle
Polymers complexed with lithium salts are promising for use as solid electrolytes in solid-state lithium batteries. However, the key issue is the ionic conductivity and the process of enhancing it for better performance. Polyethylene glycol-based solid polymer electrolytes complexed with lithium salts are being investigated to explore their suitability in battery applications. In the present work, we report the investigations carried out on PEG-based solid polymer electrolyte complexed with lithium tri-fluoromethanesulfonate (LiCF3SO3). The ionic conductivity profile as a function of salt content is studied. The effect of the addition of inert nanofiller SiO2 is also investigated to understand the mechanism of enhancement of ionic conductivity. The preparation of the nanocomposite solid polymer electrolytes and characterization by other techniques like powder XRD, IR spectroscopy, thermal measurements and conductivity profile obtained from AC impedance measurements are discussed to get an insight into the mechanism of ion transport and the influence of the addition of nanofiller.
{"title":"Investigations on Ionic Conductivity of Nanocomposite Solid Polymer Electrolytes (PEG)xLiCF3SO3:(SiO2)y","authors":"R. V. Patil, R. Damle","doi":"10.30799/jnst.287.19050507","DOIUrl":"https://doi.org/10.30799/jnst.287.19050507","url":null,"abstract":"Polymers complexed with lithium salts are promising for use as solid electrolytes in solid-state lithium batteries. However, the key issue is the ionic conductivity and the process of enhancing it for better performance. Polyethylene glycol-based solid polymer electrolytes complexed with lithium salts are being investigated to explore their suitability in battery applications. In the present work, we report the investigations carried out on PEG-based solid polymer electrolyte complexed with lithium tri-fluoromethanesulfonate (LiCF3SO3). The ionic conductivity profile as a function of salt content is studied. The effect of the addition of inert nanofiller SiO2 is also investigated to understand the mechanism of enhancement of ionic conductivity. The preparation of the nanocomposite solid polymer electrolytes and characterization by other techniques like powder XRD, IR spectroscopy, thermal measurements and conductivity profile obtained from AC impedance measurements are discussed to get an insight into the mechanism of ion transport and the influence of the addition of nanofiller.","PeriodicalId":187599,"journal":{"name":"Journal of Nanoscience and Technology","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131898378","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}
Pub Date : 2019-10-14DOI: 10.30799/jnst.285.19050506
S. Deshmukh, S. Patil, R. H. Bari
Article history: Received 07 September 2019 Accepted 27 September 2019 Available online 14 October 2019 In present work we have synthesized ZrO2 thick and thin film by different techniques. Prepared ZrO2 thick and thin films were investigated by different analytical techniques such as XRD, FESEM, FETEM, and UV-Visible spectral studies. From these studies, it was observed that the size of the synthesized films is found within 25 nm and 7 nm crystallite sizes for thick and thin film respectively. Crystanality, grain size, band gap, activation energy and other for both films were discussed, interpreted and reported. Comparative studies in all aspects were presented in this work.
{"title":"Studies on ZrO2 Thick and Thin Films: Structural, Morphological, Optical and Microstructure Behaviour","authors":"S. Deshmukh, S. Patil, R. H. Bari","doi":"10.30799/jnst.285.19050506","DOIUrl":"https://doi.org/10.30799/jnst.285.19050506","url":null,"abstract":"Article history: Received 07 September 2019 Accepted 27 September 2019 Available online 14 October 2019 In present work we have synthesized ZrO2 thick and thin film by different techniques. Prepared ZrO2 thick and thin films were investigated by different analytical techniques such as XRD, FESEM, FETEM, and UV-Visible spectral studies. From these studies, it was observed that the size of the synthesized films is found within 25 nm and 7 nm crystallite sizes for thick and thin film respectively. Crystanality, grain size, band gap, activation energy and other for both films were discussed, interpreted and reported. Comparative studies in all aspects were presented in this work.","PeriodicalId":187599,"journal":{"name":"Journal of Nanoscience and Technology","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134624020","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}
Pub Date : 2019-09-19DOI: 10.30799/jnst.278.19050505
H. Kumar, R. Shilpa, S. Ananda
Cadmium oxide (CdO) nanomaterial has been synthesized by electrochemical method which is simple and inexpensive method. The synthesized cadmium oxide nanomaterial was used as a catalyst for the photocatalytic degradation of acetic acid, formic acid and oxalic acids under varies experimental conditions by volumetric method. The synthesized nanomaterials were characterized by various techniques such as UV-Visible spectroscopy, SEM-EDAX, FT-IR spectrum and X-ray diffraction studies. The UV-VIS spectroscopy study revealed that the band gap energy of cadmium oxide nanomaterials to be 2. 85 eV Tauc plot. The structure of cadmium oxide was found to be cubic structure and crystal size was found to be 32 nm which was confirmed from XRD data. SEM reports showed that the cadmium oxide nanomaterials have regular spherical shape and uniform size. The presence of cadmium and oxygen in the nanomaterial is confirmed from the EDAX spectrum. FT-IR spectra reveal the presence of characteristic band corresponds to Cd-O mode. The photocatalytic activity of the synthesized cadmium oxide nanomaterial was examined by the kinetics of photodegradation of carboxylic acids by volumetric method by using NaOH solution. Taft LFER was tested the isokinetic temperature β was calculated for oxidation of carboxylic acids. The antibacterial activity of cadmium oxide nanomaterial was investigated.
采用电化学方法合成了氧化镉(CdO)纳米材料，这是一种简单、廉价的方法。以合成的氧化镉纳米材料为催化剂，采用体积法在不同的实验条件下对乙酸、甲酸和草酸进行光催化降解。利用紫外可见光谱、SEM-EDAX、FT-IR光谱和x射线衍射等技术对合成的纳米材料进行了表征。紫外可见光谱研究表明，氧化镉纳米材料的带隙能为2。85 eV Tauc地块。XRD数据证实了氧化镉的结构为立方结构，晶粒尺寸为32 nm。SEM报告表明，氧化镉纳米材料具有规则的球形和均匀的尺寸。EDAX光谱证实了纳米材料中镉和氧的存在。FT-IR光谱显示存在对应Cd-O模式的特征带。采用NaOH溶液，用体积法考察了合成的氧化镉纳米材料对羧酸的光降解动力学。测定了Taft LFER，计算了羧酸氧化的等动温度β。研究了氧化镉纳米材料的抗菌活性。
{"title":"Synthesis of Cadmium Oxide Nanoparticles by Electrochemical Method: Its Photodegradative Effects on Carboxylic Acids and Antibacterial Behaviours","authors":"H. Kumar, R. Shilpa, S. Ananda","doi":"10.30799/jnst.278.19050505","DOIUrl":"https://doi.org/10.30799/jnst.278.19050505","url":null,"abstract":"Cadmium oxide (CdO) nanomaterial has been synthesized by electrochemical method which is simple and inexpensive method. The synthesized cadmium oxide nanomaterial was used as a catalyst for the photocatalytic degradation of acetic acid, formic acid and oxalic acids under varies experimental conditions by volumetric method. The synthesized nanomaterials were characterized by various techniques such as UV-Visible spectroscopy, SEM-EDAX, FT-IR spectrum and X-ray diffraction studies. The UV-VIS spectroscopy study revealed that the band gap energy of cadmium oxide nanomaterials to be 2. 85 eV Tauc plot. The structure of cadmium oxide was found to be cubic structure and crystal size was found to be 32 nm which was confirmed from XRD data. SEM reports showed that the cadmium oxide nanomaterials have regular spherical shape and uniform size. The presence of cadmium and oxygen in the nanomaterial is confirmed from the EDAX spectrum. FT-IR spectra reveal the presence of characteristic band corresponds to Cd-O mode. The photocatalytic activity of the synthesized cadmium oxide nanomaterial was examined by the kinetics of photodegradation of carboxylic acids by volumetric method by using NaOH solution. Taft LFER was tested the isokinetic temperature β was calculated for oxidation of carboxylic acids. The antibacterial activity of cadmium oxide nanomaterial was investigated.","PeriodicalId":187599,"journal":{"name":"Journal of Nanoscience and Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133874028","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}
Pub Date : 2019-09-14DOI: 10.30799/jnst.275.19050504
. M.Sivaraj, S. Sudhakar, M. Arivanandhan, . S.Ganesan, . R.Jayavel
In the current study, a facile and eco-friendly method has been developed for the synthesis of titanium dioxide nanoparticles from titanium isopropoxide solution using Datura metel (Vellai Umathai) leaves and orange peel extract. Silver nanoparticles (60 nm) and silver nanoplates (130 nm) have been synthesized and characterized using UV-visible spectroscopy, X-ray diffractometer (XRD), atomic force microscopy (AFM) and scanning electron microscopy (SEM). The silver nanoparticles are doped with TiO2 nanoparticles. The photocatalytic activity of Ag nanoparticles and nanoplates doped TiO2 nanoparticles coated on vitrified tiles was investigated, wherein, degradation of methylene blue, rapidly on exposure to sunlight was observed. Analysis of the antimicrobial activity measured using colony forming units showed a 4-log reduction in the growth of the Gram-negative bacteria and a 5-log reduction in the growth of the Gram-positive bacteria.
{"title":"Study on Photo-Catalytic and Antimicrobial Activity of Green Synthesized TiO2 Nanoparticles Coated Vitrified Tiles","authors":". M.Sivaraj, S. Sudhakar, M. Arivanandhan, . S.Ganesan, . R.Jayavel","doi":"10.30799/jnst.275.19050504","DOIUrl":"https://doi.org/10.30799/jnst.275.19050504","url":null,"abstract":"In the current study, a facile and eco-friendly method has been developed for the synthesis of titanium dioxide nanoparticles from titanium isopropoxide solution using Datura metel (Vellai Umathai) leaves and orange peel extract. Silver nanoparticles (60 nm) and silver nanoplates (130 nm) have been synthesized and characterized using UV-visible spectroscopy, X-ray diffractometer (XRD), atomic force microscopy (AFM) and scanning electron microscopy (SEM). The silver nanoparticles are doped with TiO2 nanoparticles. The photocatalytic activity of Ag nanoparticles and nanoplates doped TiO2 nanoparticles coated on vitrified tiles was investigated, wherein, degradation of methylene blue, rapidly on exposure to sunlight was observed. Analysis of the antimicrobial activity measured using colony forming units showed a 4-log reduction in the growth of the Gram-negative bacteria and a 5-log reduction in the growth of the Gram-positive bacteria.","PeriodicalId":187599,"journal":{"name":"Journal of Nanoscience and Technology","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126728642","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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