Volume 4,Issue 5,2018最新文献_第3页

Fabrication of Graphene–CuO Nanocomposite with Improved Photocatalytic Degradation for Palladium Solution under Solar Light Irradiation 太阳光照下改进光催化降解钯溶液的石墨烯- cuo纳米复合材料的制备

Volume 4,Issue 5,2018 Pub Date : 2018-09-04 DOI: 10.30799/JNST.149.18040509

B. Prashanti, T. Damodharam

引用次数: 4

Structural, Dielectric and Magnetic Properties of Al3+ and Cr3+ Substituted Ni-Zn-Cu Ferrites Al3+和Cr3+取代Ni-Zn-Cu铁氧体的结构、介电和磁性能

Volume 4,Issue 5,2018 Pub Date : 2018-08-31 DOI: 10.30799/JNST.157.18040507

G. Satyanarayana, G. N. Rao, K. V. Babu

引用次数: 3

Heterogeneous Mixture of Nanoparticles from MoS2 and Ta2O5: Synthesis and Characterization 二硫化钼与Ta2O5非均相混合纳米粒子的合成与表征

Volume 4,Issue 5,2018 Pub Date : 2018-08-31 DOI: 10.30799/JNST.153.18040508

Sonali Samantra, S. S. Ray

{"title":"Heterogeneous Mixture of Nanoparticles from MoS2 and Ta2O5: Synthesis and Characterization","authors":"Sonali Samantra, S. S. Ray","doi":"10.30799/JNST.153.18040508","DOIUrl":"https://doi.org/10.30799/JNST.153.18040508","url":null,"abstract":"The synthesis of metallic nanoparticles is an active area of academic and application research in nanotechnology. It is also an amalgamating technology which has fascinating multi-disciplinary application in various sections. Nanoparticles has been a conventional but field if we go on further decreasing the size we enter the field of quantum dots (<10 nm) with application in the form of tracers, labels, sensors etc. Molybdenum disulfide and tantalum nanoparticles were synthesized and characterized through FESEM, FTIR, XRD,UV-Vis spectroscopy, spectrofluorimetry, etc. The size of the synthesized nanoparticles as observed in FESEM were found to be in the range of 22 to 50 nm for molybdenum nanoparticle and 34.72 to 72.45 nm in case of tantalum. The EDAX analysis shows the composition of molybdenum nanoparticle as hydrogen(H), molybdenum(Mo), nitrogen(N), oxygen(O) and fluorine(F) with 32.3%, 66.3%, 0.43%, 0.32% and 0.5% respectively. The EDAX analysis show the composition of tantalum nanoparticle as hydrogen(H), tantalum(Ta), oxygen(O), nitrogen(N) and fluorine(F) with 35.9%,50%,4.8%,2.01%,7.17%. The XRD analysis of molybdenum disulfide images indicates the synthesized nanoparticle as crystalline in nature. The average crystallinity was found to be 7.93 nm. Tantalum nanoparticles with a crystallinity of 8.05 and 12.20 nm were observed as [2 0 0] and [1 1 0] planes. Biocompatibility of the synthesized nanoparticles was examined by MTT assay. The spectrofluorometry of the synthesized nanoparticles proves the fluorescence property which is most probably because of the quantum dots. Furthermore, the fluorescence property was also used for the cell imaging. The study is a first its kind to exercise the use of Mo and Ta quantum dots in the field of biomedical application and further work is necessary for optimization and implementation of the nanoparticles in the biological sector.","PeriodicalId":268157,"journal":{"name":"Volume 4,Issue 5,2018","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134411535","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

Fabrication and Characterization of Dye-Sensitized Solar Cell using Chemically Grown ZnS Nanoparticles 化学生长ZnS纳米颗粒染料敏化太阳能电池的制备与表征

Volume 4,Issue 5,2018 Pub Date : 2018-08-31 DOI: 10.30799/JNST.155.18040506

K. Bera, S. Saha, P. Jana

引用次数: 1

Synthesis and Characterization of Pure and Rare-Earth Metal Gd Doped SnO2-CuO Nanoparticles by Co-Precipitation Method 共沉淀法合成纯和稀土金属Gd掺杂SnO2-CuO纳米颗粒及表征

Volume 4,Issue 5,2018 Pub Date : 2018-08-30 DOI: 10.30799/JNST.152.18040505

L. Prakash, C. Tirupathi

{"title":"Synthesis and Characterization of Pure and Rare-Earth Metal Gd Doped SnO2-CuO Nanoparticles by Co-Precipitation Method","authors":"L. Prakash, C. Tirupathi","doi":"10.30799/JNST.152.18040505","DOIUrl":"https://doi.org/10.30799/JNST.152.18040505","url":null,"abstract":"Pure and rare-earth metal Gd doped SnO2-CuO nanoparticles were successfully prepared from the starting materials SnCl2, CuCl2 and doping element gadolinium nitrate. Pure and Gd doped SnO2-CuO were synthesized by co-precipitation method. The samples were characterized using X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), UV-Vis, SEM, EDX and dielectric studies. The XRD analysis reveals that the rare-earth metal Gd dopants were substituted into rutile SnO2-CuO nanoparticles. Pure SnO2-CuO nanoparticles have an average crystallite size of 15 nm and rare-earth metal Gd doped SnO2-CuO nanoparticles have 18 nm. The average crystallite size of the sample increases when dopant was used and XRD peak intensity also increases when compared to pure SnO2-CuO nanoparticles. The optical absorption measurements exposed the nanometric size of the materials influences the energy band gap. Optical band gap was found to be 5.08 eV for pure SnO2-CuO nanoparticles and 5.14 eV for Gd doped SnO2-CuO nanoparticles. Surface morphology of pure and Gd doped SnO2-CuO nanoparticles annealed at 400 °C shows that most of the particles are rod shaped and hence it may have better sensitivity. Dielectric constant and dielectric loss decrease with increasing frequency at 100 °C and 200 °C. Doped samples show larger dielectric properties than pure SnO2-CuO nanoparticles.","PeriodicalId":268157,"journal":{"name":"Volume 4,Issue 5,2018","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125416635","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

Synthesis and Characterization of Nano Bioglass for the Application of Bone Tissue Engineering 用于骨组织工程的纳米生物玻璃的合成与表征

Volume 4,Issue 5,2018 Pub Date : 2018-08-20 DOI: 10.30799/JNST.127.18040503

Pawan Kumar, B. S. Dehiya, A. Sindhu, Vinod Kumar

{"title":"Synthesis and Characterization of Nano Bioglass for the Application of Bone Tissue Engineering","authors":"Pawan Kumar, B. S. Dehiya, A. Sindhu, Vinod Kumar","doi":"10.30799/JNST.127.18040503","DOIUrl":"https://doi.org/10.30799/JNST.127.18040503","url":null,"abstract":"In this paper, we are addressing the development of new composition (60%SiO2-30%CaO-10%P2O5) of biodegradable and biocompatible bioglass (nBG) nanoparticles. The bioglass nanoparticles have been fabricated by sol-gel method. To get functionalized bioglass nanoparticles, they were treated with lysozyme (1 mg/mL) for 48 h. Morphology of nanoparticles, such as structure, particle size, and surface topography were studied by TEM. Bioglass nanoparticles generate hydroxyapatite layer when nanoparticles treated with simulated body fluid (SBF) for 7 days. The presence of bioglass and hydroxyapatite phases confirmed by XRD. TEM images revealed irregular shaped with slightly agglomeration of nanoparticles in nanometer range (200 to 500 nm). The in-vitro biodegradation of nanoparticles was confirmed by weight loss in the presence of SBF. The cytotoxicity effects and cell proliferation of respective sample were investigated through MTT assay. BET results revealed average surface area (10.4 m2/g) of nanoparticles. The nano range of particles will provide better surface to volume ratio over micro or macro particles which makes them more effective so they are often able to react rapidly.","PeriodicalId":268157,"journal":{"name":"Volume 4,Issue 5,2018","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130959881","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: 9

Synthesis and Characterization of Cobalt Oxide Nanoparticles 氧化钴纳米颗粒的合成与表征

Volume 4,Issue 5,2018 Pub Date : 2018-08-20 DOI: 10.30799/JNST.144.18040504

K. Latha, C. Prema, S. Sundar

{"title":"Synthesis and Characterization of Cobalt Oxide Nanoparticles","authors":"K. Latha, C. Prema, S. Sundar","doi":"10.30799/JNST.144.18040504","DOIUrl":"https://doi.org/10.30799/JNST.144.18040504","url":null,"abstract":"The present work reports the synthesis and characterization of cobalt oxide nanoparticles. Microwave oven method was used for synthesizing cobalt oxide nanoparticles. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV-Vis spectroscopy, photoluminescence (PL) and scanning electron microscope (SEM). The prepared samples show poor crystalline nature so that the samples were calcined at 300 °C for 1 hr. The calcined samples were characterized for further changes in its morphology. XRD identifies the sample is in Co3O4 phase with face-centered cubic structure. Debye-Scherer formula was used to calculate the average crystallite size of the annealed sample and it was found to be 7 to 28 nm. In addition to crystallite size, specific surface area, dislocation density and microstrain are calculated using XRD. Williamson-Hall plot was used to calculate the size and strain. FT-IR spectrum shows two stretching bands at 660 and 550 cm−1 which confirm the functional group present in the cobalt oxide nanoparticles. In optical absorption studies, a blue shift in the energy band gap reveals the quantum confinement effect. Photoluminescence spectra shows emission peak in the visible region.","PeriodicalId":268157,"journal":{"name":"Volume 4,Issue 5,2018","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115793583","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: 10

A Facile Synthesis of Copper Oxide Nanorods for Photocatalytic Degradation of Organic Pollutant and Inactivation of Pathogens 用于光催化降解有机污染物和致病菌的氧化铜纳米棒的简单合成

Volume 4,Issue 5,2018 Pub Date : 2018-08-07 DOI: 10.30799/JNST.146.18040502

S. Botsa, D. Ramadevi, K. Basavaiah

{"title":"A Facile Synthesis of Copper Oxide Nanorods for Photocatalytic Degradation of Organic Pollutant and Inactivation of Pathogens","authors":"S. Botsa, D. Ramadevi, K. Basavaiah","doi":"10.30799/JNST.146.18040502","DOIUrl":"https://doi.org/10.30799/JNST.146.18040502","url":null,"abstract":"In the recent years, green synthesis of nanomaterials has received a great attention to researchers in worldwide due to eco-friendly and scalable synthesis. Here, we report a green synthesis of copper oxide (CuO) nanorods via sonochemical assisted approach. The crystalline structure, band gap and morphology of as prepared CuO nanorods were investigated by UV-Vis diffuse reflectance (UV-Vis/DRS), Fourier Transform infrared spectroscopy, powder X-Ray diffraction (XRD) pattern and scanning electron microscopy (FESEM-EDX). The bandgap of as prepared CuO nanorods was found to be 2.0 eV, which is fall in the visible region of solar spectrum. FTIR demonstrated that there is strong interaction between Cu and oxygen in prepared CuO. XRD results reveal the formation of phase pure and crystalline CuO. FESEM images clearly show the rod like morphology of CuO and the presence of elemental copper and oxygen in EDX, confirms the formation of CuO. The photocatalytic degradation activity of CuO nanorods was examined against a model dye pollutant, nitrobenzene (NB) under visible light irradiation. CuO nanorods were effectively degraded the NB under visible light irradiation. CuO nanorods acts as potent and shows enhanced antimicrobial agent against pathogenic fungi, Candida albicans and bacteria, Escherichia coli.","PeriodicalId":268157,"journal":{"name":"Volume 4,Issue 5,2018","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115120581","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: 14

Influence of Co-Dopant on Structural, Optical and Electrochemical Properties of Zinc Sulphide Quantum Dots 共掺杂对硫化锌量子点结构、光学和电化学性能的影响

Volume 4,Issue 5,2018 Pub Date : 2018-08-04 DOI: 10.30799/JNST.143.18040501

S. Velusubhash, K. Kalirajan, S. Harikengaram, R. Vettumperumal, R. Murugesan, A. Rajarajeswari

{"title":"Influence of Co-Dopant on Structural, Optical and Electrochemical Properties of Zinc Sulphide Quantum Dots","authors":"S. Velusubhash, K. Kalirajan, S. Harikengaram, R. Vettumperumal, R. Murugesan, A. Rajarajeswari","doi":"10.30799/JNST.143.18040501","DOIUrl":"https://doi.org/10.30799/JNST.143.18040501","url":null,"abstract":"In the present work, solution based simple chemical precipitation method has been employed to prepare undoped, cobalt (Co)-doped and cobalt, nickel (Co, Ni) co-doped ZnS quantum dots (QDs). The XRD pattern revealed that all samples displayed cubic zinc blende structure. The average crystallite size of as prepared ZnS QDs were found to be in 1.0 to 1.4 nm range. Surface morphological of synthesized samples were recorded and some distinction in morphological features between undoped, doped and co-doped ZnS QDs were noticed. EDX analysis confirms the presence of all corresponding elements in the samples. The blue-shift in the absorption spectra was observed. The optical band gap energy (Eg) for all the hybrid ZnS QDs samples were evaluated by using UV-Visible optical absorption spectral data. In PL analysis, emission band at 660 nm was found to be quenched as ZnS QDs interact with dopant and co-dopant. Electrochemical analysis was carried out by transition of photogenerated electrons in undoped, cobalt (Co)-doped and cobalt, nickel (Co, Ni) co-doped ZnS QDs modified glassy carbon electrodes. To authenticate the results of PL and electrochemical studies, photocatalytic behaviour of QDs were studied and positive impact of doping and co-doping process on photo degradation were noticed and discussed.","PeriodicalId":268157,"journal":{"name":"Volume 4,Issue 5,2018","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115561357","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: 6