Volume 5, Issue 2最新文献_第2页

Eco-Friendly Microwave Assisted Green Synthesis, Characterization and Antibacterial Activity of Silver Nanoparticles 纳米银的微波辅助绿色合成、表征及抗菌活性研究

Volume 5, Issue 2 Pub Date : 2019-06-11 DOI: 10.30799/JNST.246.19050402

D. Kumar, A. Tiwari, Neelam

引用次数: 1

Green Synthesis and Characterization of Silver Nanoparticles using Ethanol Extract of Myristica fragrans (Nutmeg) and Its Biological Applications 肉豆蔻乙醇提取物绿色合成纳米银及其生物学应用研究

Volume 5, Issue 2 Pub Date : 2019-06-08 DOI: 10.30799/JNST.S02.19050309

P. Malini, V. Premalatha, S. Rani

引用次数: 3

CO2 Sequestration by Thermophiles with Ethanol Production 嗜热菌在乙醇生产中的CO2固存作用

Volume 5, Issue 2 Pub Date : 2019-06-08 DOI: 10.30799/JESPR.162.19050203

Bhatia Ruchi, Kataria Rosy, B. Tripti

引用次数: 0

Biosynthesis of Cobalt Oxide Nanoparticles - A Short Review 氧化钴纳米颗粒的生物合成研究进展

Volume 5, Issue 2 Pub Date : 2019-06-07 DOI: 10.30799/JNST.S01.19050308

S. Alwin David, V. Veeraputhiran, C. Vedhi

引用次数: 8

Effect of Laser Induced Potassium Oxalate (C2K2O4) Nanopowder 激光诱导草酸钾纳米粉体的制备效果

Volume 5, Issue 2 Pub Date : 2019-06-06 DOI: 10.30799/JNST.S22.19050302

J. Thabithal, N. Ravi

引用次数: 0

Synthesis and Characterization of CdS/Polypyrrole Core/Shell Nanocomposites with Controlled Grain Size 可控粒径CdS/聚吡咯核/壳纳米复合材料的合成与表征

Volume 5, Issue 2 Pub Date : 2019-06-06 DOI: 10.30799/JNST.S09.19050306

G. Manohari, M. D. Sweetlin

{"title":"Synthesis and Characterization of CdS/Polypyrrole Core/Shell Nanocomposites with Controlled Grain Size","authors":"G. Manohari, M. D. Sweetlin","doi":"10.30799/JNST.S09.19050306","DOIUrl":"https://doi.org/10.30799/JNST.S09.19050306","url":null,"abstract":"Article history: Received 20 March 2019 Accepted 29 April 2019 Available online 04 June 2019 Many challenges of core/shell nanostructures for various applications still exist. The structure including the diameter, length, spacing and the thickness of the core or shell is difficult to control precisely. Metal nanoparticles used as various types of catalysts adsorbents and sensors. They have applications in optical, electronic and magnetic devices. Majority of these applications significantly depend on the size of the nanoparticles. Therefore, the synthesis of nanoparticles with controlled grain size is important. In the present work, Cadmium sulfide (CdS) was used as the core material which coated by the polypyrrole (PPy). To form the core and the shell set, the diameter fixed and measured theoretically. The calculated amount is used to prepare the shell which is formed by addition polymerization. The XRD studies are used to determine the particle size of the core shell nanocomposite. The average particle size of CdS and CdS/PPy is 13 nm and 15 nm respectively. Fourier transform infrared (FTIR) spectra and UV-Vis spectra are used to characterize the structure and to calculate the band gap of the core/shell nanocomposite. The AFM studies give the surface morphology of the samples.","PeriodicalId":23576,"journal":{"name":"Volume 5, Issue 2","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86892850","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}

引用次数: 4

Single Step Synthesis of Poly(o-Anisidine) Lignosulfonate Composite Protected Silver Nanoparticles and Study of Their Application on Reduction of Nitrophenol and Textile Dyes 聚(o-茴香胺)木素磺酸酯复合保护纳米银的一步合成及其在还原硝基酚和纺织染料中的应用研究

Volume 5, Issue 2 Pub Date : 2019-06-06 DOI: 10.30799/JNST.S23.19050303

D. M. Soundari, K. Pandian

{"title":"Single Step Synthesis of Poly(o-Anisidine) Lignosulfonate Composite Protected Silver Nanoparticles and Study of Their Application on Reduction of Nitrophenol and Textile Dyes","authors":"D. M. Soundari, K. Pandian","doi":"10.30799/JNST.S23.19050303","DOIUrl":"https://doi.org/10.30799/JNST.S23.19050303","url":null,"abstract":"Article history: Received 20 March 2019 Accepted 29 April 2019 Available online 04 June 2019 Lignosulfonate doped poly(o-anisidine) and poly(o-anisidine)/lignosulfonate polymer composite protected silver nanoparticles (AgNPs) were synthesized by interfacial polymerization method by mixing of an equal molar ratio of o-anisidine and lignosulfonate using silver nitrite as oxidizing agent. The polymerization reaction was carried out under reflux condition at 80 °C for 3 hours. The resulting AgNPs nanocomposite was isolated and then characterized by using various instrument method including UV-visible spectroscopy, FT-IR, and FE-SEM analysis. The catalytic behaviour of the polymer protected silver nanoparticle was studied for the reduction of 4-nitrophenol (4-NP) and textile dyes like methylene blue (MB) and Congo Red. The reduction of 4-nitrophenol using AgNPs/poly(o-anisidine) nanocomposite reaction follow the pseudo first order kinetics and the resulting rate constant was found to be 10 min-1 for 4.0×10-4 M concentration of 4-NP using 10 mg/L of catalyst. On the other hand, the catalytic behaviour of the nanocomposite was investigated toward the degradation of some of the textile dyes such as MB and Congo Red. The percentage of degradation of dye was monitored by UV-visible spectral studies and found to be superior to the other catalyst used for the degradation studies. The present method was employed for the effective removal of textile dyes and reduction of 4-nitrophenol with a minimum amount of catalyst.","PeriodicalId":23576,"journal":{"name":"Volume 5, Issue 2","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80213571","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}

引用次数: 1

Synthesis and Characterization of Pure and Gd-Doped CeO2 Nanoparticles 纯CeO2纳米颗粒的合成与表征

Volume 5, Issue 2 Pub Date : 2019-06-06 DOI: 10.30799/JNST.S10.19050305

M. Sridaran, K. Dhanasekar, M. Arivanandhan

引用次数: 6

Photocatalytic and Antimicrobial Activities of Polyaniline Nanocomposites with Molybdates 钼酸盐聚苯胺纳米复合材料的光催化及抗菌活性

Volume 5, Issue 2 Pub Date : 2019-06-06 DOI: 10.30799/JNST.S11.19050304

S. Balamurugan, D. Sathya, S. Kalyanaraman, A. Pushparaj, R. Murugesan

{"title":"Photocatalytic and Antimicrobial Activities of Polyaniline Nanocomposites with Molybdates","authors":"S. Balamurugan, D. Sathya, S. Kalyanaraman, A. Pushparaj, R. Murugesan","doi":"10.30799/JNST.S11.19050304","DOIUrl":"https://doi.org/10.30799/JNST.S11.19050304","url":null,"abstract":"Article history: Received 20 March 2019 Accepted 29 April 2019 Available online 04 June 2019 The present study describes the process for the formation of PANI nanocomposite incorporated with metal (Cd, Bi, Ba) molybdates of binary metal oxide. The PANI and its nanocomposites were prepared by 0.1 M aniline in 100 mL of 1 M sulphuric acid in the presence or absence of 50 mg of metal molybdate by chemical polymerization using 0.1 M APS as oxidant in 100 mL of 1 M sulphuric acid. The polymerisation yields are increased due to incorporation of metal molybdates. The growth of polymerization is also enhanced. The interaction of metal molybdates into PANI matrix leads to increase in very high conductivity, heavy interaction between the two-polymer chain lead to increase in stability of the polymer. In the incorporation of metal molybdate into the polymer matrix leads to increase in conductivity of about 5, 4 and 2 times with respect to the original sample (PANI) as in PANI-CdMoO4, PANI-BiMoO4 and PANI-BaMoO4 respectively. The incorporation of metal molybdates is confirmed by XRD and UV-VIS spectral studies. The XRD studies are also suggested the presence of chemical interaction between polymer chain and incorporated metal molybdates. The antimicrobial activity of the synthesized material PANI and PANI-nanocomposites were tested against four bacteria, Escherichia coli, Staphylococcus aureus, P. aeruginosa and Proteus vulgaris using disc diffusion method. The nanocomposite doped polymer possesses excellent antibacterial property. The results on MB dye degradation showed that PANI-SO4/CdMoO4 photocatalyst, under visible light degraded 80.2 % of MB dye after 180 min. The photo-degradation study, thus, suggests that the light absorption of PANI and catalytic role of CdMoO4 could be coupled for high photo-catalytic functionality. This work opens a new avenue for the design of new modified photo-catalysts with high activity for the large-scale water treatment and other applications.","PeriodicalId":23576,"journal":{"name":"Volume 5, Issue 2","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88265219","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}

引用次数: 0

Photocatalytic Activity of Pure and Nickel Doped Cadmium Sulphide Nanoparticles Synthesized via Co-Precipitation Method 共沉淀法合成纯和掺杂镍的硫化镉纳米颗粒的光催化活性

Volume 5, Issue 2 Pub Date : 2019-06-06 DOI: 10.30799/JNST.S21.19050301

A. Leena, K. Raji

{"title":"Photocatalytic Activity of Pure and Nickel Doped Cadmium Sulphide Nanoparticles Synthesized via Co-Precipitation Method","authors":"A. Leena, K. Raji","doi":"10.30799/JNST.S21.19050301","DOIUrl":"https://doi.org/10.30799/JNST.S21.19050301","url":null,"abstract":"Article history: Received 20 March 2019 Accepted 29 April 2019 Available online 04 June 2019 Cadmium sulfide is an important group of II-VI semiconducting nanomaterials with excellent physical properties and wide bandgap energy, are successful in the utilization of photocatalytic application. Photo technology is one of important technology to solve environmental and energy issues. Incorporating a transition metal ion dopant into CdS nanocrystalline is a convenient way to tailor its physical properties. In this present work, we have synthesized transition metal ion nickel doped CdS nanocrystals via coprecipitation method. The objective of this research is to investigate the photocatalytic activity of pure and nickel doped CdS nanocrystals for the degradation of methylene blue and to provide an experimental base for further study and practical application in textile effluent and wastewater treatment processes. Many factors can influence the performance of photocatalytic activity such as phase composition, crystallite size, morphology, and energy gap. The structural and optical properties of as-synthesized materials were studied by XRD, EDAX, SEM, UV, PL, and FTIR. Photocatalytic degradation of methylene blue was performed by using nickel doped CdS nanoparticles in a photoreactor vessel irradiated by visible light from the tungsten lamp (λmax=400 nm).","PeriodicalId":23576,"journal":{"name":"Volume 5, Issue 2","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84853160","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}

引用次数: 2