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International Journal of Green Nanotechnology最新文献

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Fabrication and Studies on FTO/(Compact ZnO/Porous ZnO: Eosin-Y)/C: FTO Solar Cell FTO/(紧凑ZnO/多孔ZnO: Eosin-Y)/C: FTO太阳能电池的制备与研究
International Journal of Green Nanotechnology Pub Date : 2012-10-01 DOI: 10.1080/19430892.2012.737739
Shubhangi S. Khadtare, S. Jadkar, H. Pathan
{"title":"Fabrication and Studies on FTO/(Compact ZnO/Porous ZnO: Eosin-Y)/C: FTO Solar Cell","authors":"Shubhangi S. Khadtare, S. Jadkar, H. Pathan","doi":"10.1080/19430892.2012.737739","DOIUrl":"https://doi.org/10.1080/19430892.2012.737739","url":null,"abstract":"ABSTRACT Dye sensitized solar cells (DSSC) are photoelectrochemical solar cells. They are based upon an iodide tri-iodide redox couple mediated between a photosensitive electrodes of semiconductor materials stained with a photosensitive dye and a catalytic counter electrode. In the present investigation, ZnO compact layer was deposited using chemical solution deposition (CSD) method followed by porous ZnO layer by doctor blade (DB) method. Eosin-Y dye was used to sensitize ZnO films. DSSC fabricated using ZnO nanostructures with both, compact and porous layers (FTO/(Compact ZnO/Porous ZnO: Eosin-Y)/C/FTO), exhibited a conversion efficiency of ∼ 1.20% under 100 mW/cm2.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"62 1","pages":"528-533"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74767804","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
Environmental Applications of Nanocrystalline TiO2 in Combination with H2O2 纳米TiO2与H2O2结合的环境应用研究
International Journal of Green Nanotechnology Pub Date : 2012-10-01 DOI: 10.1080/19430892.2012.739479
S. Shintre, P. Thakur
{"title":"Environmental Applications of Nanocrystalline TiO2 in Combination with H2O2","authors":"S. Shintre, P. Thakur","doi":"10.1080/19430892.2012.739479","DOIUrl":"https://doi.org/10.1080/19430892.2012.739479","url":null,"abstract":"ABSTRACT Heterogeneous photocatalysis using nanostructured semiconductors constitutes one of the emerging advanced oxidation processes (AOP) for destructive oxidation of organic contaminants in water or air. Herein we report the kinetics of potocatalytic degradation of nitrophenols (NPs), namely, o-nitrophenol (ONP), m-nitrophenol (MNP), and p-nitrophenol (PNP), using semiconductor photocatalyst TiO2 in suspension, using laboratory-scale immersion well an ultraviolet (UV) photoreactor and the comparison of different advanced oxidation processes such as (i) UV + TiO2 (ii) UV + TiO2 + H2O2. In addition, the effect of several other parameters such as TiO2 concentration, initial concentration of substrate solution, and effect of time of irradiation was investigated to arrive at optimum process parameters for complete degradation of the pollutants. UV light was found to have a negligible effect in the absence of the photocatalyst, TiO2, whereas the percentage degradation of all three NPs was found to be drasti...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"69 1","pages":"430-439"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81363944","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
Antibacterial Properties of Au-Ag Alloy Nanoparticles 纳米Au-Ag合金的抗菌性能
International Journal of Green Nanotechnology Pub Date : 2012-10-01 DOI: 10.1080/19430892.2012.739461
N. S. Tabrizi, M. Tazikeh, N. Shahgholi
{"title":"Antibacterial Properties of Au-Ag Alloy Nanoparticles","authors":"N. S. Tabrizi, M. Tazikeh, N. Shahgholi","doi":"10.1080/19430892.2012.739461","DOIUrl":"https://doi.org/10.1080/19430892.2012.739461","url":null,"abstract":"ABSTRACT This article reports a preliminary study on the effect of alloying on the antibacterial properties of silver and gold. Au-Ag alloy nanoparticles were synthesized in water by coreduction of the metal salts by sodium borohydride in the presence of sodium citrate as a capping agent. The particle morphology and size were studied by transmission electron microscopy. The Au-Ag (1:1) particles were 4 ± 1 nm with good monodispersity. The formation of alloy was concluded by spectrophotometry in the visible region complemented by energy-dispersive spectroscopy (EDS). The antibacterial activity of the particles was examined against Escherichia coli ATCC 25922. Interestingly, the alloy particles exhibited greater antibacterial activities than the pure metals. The antibacterial property of the alloy nanoparticles was further enhanced with an increasing molar ratio of silver.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"1 1","pages":"489-494"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74888087","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
Magnetocaloric Effect in Ga-Free Ni50Mn34×16 (X = In, Sn, and Sb) Heusler Alloys 无ga - Ni50Mn34×16 (X = in, Sn, Sb) Heusler合金的磁热效应
International Journal of Green Nanotechnology Pub Date : 2012-10-01 DOI: 10.1080/19430892.2012.738964
B. Ingale, V. Franco, A. Conde
{"title":"Magnetocaloric Effect in Ga-Free Ni50Mn34×16 (X = In, Sn, and Sb) Heusler Alloys","authors":"B. Ingale, V. Franco, A. Conde","doi":"10.1080/19430892.2012.738964","DOIUrl":"https://doi.org/10.1080/19430892.2012.738964","url":null,"abstract":"ABSTRACT The structural and magnetic transitions of Ni50Mn34×16 (X = Sn, Sb, and In) Heusler alloys have been investigated by thermomagnetic M(T) measurements through heating/cooling cycles. These alloys undergo structural transition from an austenite phase to a martensite phase in the temperature regime around 200 K. The martensitic transformation spans a wide temperature range (78–180 K), with thermal hysteresis characteristics of a first-order nature. In the structural transition regime, Ni50Mn34In16 shows a signature of field-induced transition from a martensite to austenite phase. At room temperature all of the alloys show a ferromagnetic austenite phase. Direct and inverse magnetocaloric properties and refrigeration capacity (RC) in these alloys were evaluated for a maximum field change of 15 kOe. In substitution reveals the largest ΔSm value of 3.0 J kg−1 K−1 at the martensitic (132 K) transition and −2.5 J kg−1 K−1 at the magnetic (316 K) transition. The magnitudes of the conventional magnetocalor...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"77 1","pages":"419-424"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73263360","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
Evaluation of Photodetection Properties of Graphene-Silicon Schottky IR Detector 石墨烯-硅肖特基红外探测器的光探测性能评价
International Journal of Green Nanotechnology Pub Date : 2012-10-01 DOI: 10.1080/19430892.2012.738181
F. Ghahramani, M. Amirmazlaghani, F. Raissi
{"title":"Evaluation of Photodetection Properties of Graphene-Silicon Schottky IR Detector","authors":"F. Ghahramani, M. Amirmazlaghani, F. Raissi","doi":"10.1080/19430892.2012.738181","DOIUrl":"https://doi.org/10.1080/19430892.2012.738181","url":null,"abstract":"ABSTRACT We evaluated the photodetection properties and external quantum efficiency of graphene-silicon Schottky photodetector under IR illumination for 700 nm, 1.1 μm, 2 μm, and 3.5 μm wavelengths at room temperature. The graphene-Si Schottky diode has been fabricated by depositing mechanically exfoliated HOPG on top of the pre-patterned silicon substrate. Finally, the measurements were done on the (I-V) curves of the junction to calculate photocurrent at low voltage which is of the great practical interest. We show that our graphene-Si Schottky detector can detect the IR illuminations at lower voltages than previously published work.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"6 1","pages":"464-469"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89552285","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
Catalytic Effect of Iron Nanoparticles on Heterocyst, Protein and Chlorophyll Content of Anabaena sp. 铁纳米颗粒对水藻杂囊、蛋白质和叶绿素含量的催化作用。
International Journal of Green Nanotechnology Pub Date : 2012-07-01 DOI: 10.1080/19430892.2012.706185
N. Vadivel, R. Yuvakkumar, R. Suriyaprabha, V. Rajendran
{"title":"Catalytic Effect of Iron Nanoparticles on Heterocyst, Protein and Chlorophyll Content of Anabaena sp.","authors":"N. Vadivel, R. Yuvakkumar, R. Suriyaprabha, V. Rajendran","doi":"10.1080/19430892.2012.706185","DOIUrl":"https://doi.org/10.1080/19430892.2012.706185","url":null,"abstract":"ABSTRACT Iron nanoparticles were synthesized, characterized comprehensively, and were used as catalysts on heterocyst-forming cyanobacteria. A higher induction in heterocyst was observed in all nano iron treated cultures. A low percentage (0.1, 0.3, 0.5, 1, 3, 5, and 15%) of nano iron on heterocyst-forming Anabaena sp. led to an increase in total protein and chlorophyll content. A slight decrease in protein and chlorophyll content was observed at higher concentrations (25, 60, and 100%) of nano iron. An enhanced catalytic activity of nano iron was observed on heterocyst formation, protein, and chlorophyll content of Anabaena sp.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"53 1","pages":"326-338"},"PeriodicalIF":0.0,"publicationDate":"2012-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75078400","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: 8
Wet Chemical Synthesis of Molybdenum-Doped Amorphous TiO2 Nanoparticles and Studies on Their Photochromic Properties 掺钼非晶TiO2纳米颗粒的湿法合成及其光致变色性能研究
International Journal of Green Nanotechnology Pub Date : 2012-07-01 DOI: 10.1080/19430892.2012.738963
S. Songara, J. Singh, M. Patra, Vatsana Gupta, L. Saini, G. S. Gowd, S. R. Vadera, Narendra Kumar
{"title":"Wet Chemical Synthesis of Molybdenum-Doped Amorphous TiO2 Nanoparticles and Studies on Their Photochromic Properties","authors":"S. Songara, J. Singh, M. Patra, Vatsana Gupta, L. Saini, G. S. Gowd, S. R. Vadera, Narendra Kumar","doi":"10.1080/19430892.2012.738963","DOIUrl":"https://doi.org/10.1080/19430892.2012.738963","url":null,"abstract":"ABSTRACT Undoped and (0.5–5 at%) molybdenum-doped TiO2 nanoparticles were synthesized by a simple and scalable wet chemical method. The as-synthesized materials were characterized using X-ray diffraction (XRD), atomic force microscopy (AFM), Raman spectroscopy, electron paramagnetic resistance (EPR), and ultraviolet-visible (UV-Vis) spectroscopy techniques. XRD studies showed the formation of crystalline anatase phase of undoped TiO2, whereas Mo-doped samples showed the formation of an amorphous phase. AFM studies showed the formation of spherical-shaped particles with a particle diameter of ∼23 nm in all samples. The photochromic behavior of these materials was studied by making their films in alkyd resin. Films of these materials showed a reversible photochromic color change from beige to brown on exposure to UV light. The coloration and bleaching process was recorded using UV-Vis diffuse reflectance spectroscopy. The maximum color change was observed in 2 at% Mo+6-doped nano-TiO2. The photochromic mech...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"90 1","pages":"399-407"},"PeriodicalIF":0.0,"publicationDate":"2012-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85919249","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
Evaluation of the Antimicrobial Activity ZnO/Ampicillin Nanocomposite Against Sensitive and Resistant Strains: Role of γ-Irradiation on Its Biological Activity ZnO/氨苄西林纳米复合材料对敏感和耐药菌株的抑菌活性评价:γ辐照对其生物活性的影响
International Journal of Green Nanotechnology Pub Date : 2012-07-01 DOI: 10.1080/19430892.2012.706106
Z. Tawfik, A. Badawi, H. Ahmed, Mohamed Lethy, Z. Abdeen
{"title":"Evaluation of the Antimicrobial Activity ZnO/Ampicillin Nanocomposite Against Sensitive and Resistant Strains: Role of γ-Irradiation on Its Biological Activity","authors":"Z. Tawfik, A. Badawi, H. Ahmed, Mohamed Lethy, Z. Abdeen","doi":"10.1080/19430892.2012.706106","DOIUrl":"https://doi.org/10.1080/19430892.2012.706106","url":null,"abstract":"ABSTRACT In this study the ampicillin trihydrate was modified to ZnO/ampicillin nanocomposite to improve its effectiveness as a bactericidal agent against sensitive and resistant bacterial strains. The antimicrobial activity of the standard ampicillin trihydrate and ZnO/ampicillin nanocomposite on three pathogenic bacterial strains, Gram-negative short rods, Salmonellae typhimurium, and Gram-positive cocci Staphylococcus aureus were investigated. These strains were recommended in the British Pharmacopeias to be used as the most sensitive strains for the antibiotic sensitivity test of ampicillin. Another strain of Staphylococcus aureus referred as ampicillin resistant clinical isolate was also used. Stock cultures were maintained on nutrient agar slants at 40°C until required. Gamma-irradiation unit of Co60was used for irradiation of the standards ampicillin trihydrate and ZnO ampicillin nanocomposite at the sterilizing dose 25 kGy. The antibacterial activity of the standard ampicillin was significantly en...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"17 1","pages":"240-247"},"PeriodicalIF":0.0,"publicationDate":"2012-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84316807","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
Synthesis and Characterization of Rosiglitazone Loaded Magnetic Nanopolymer 罗格列酮负载磁性纳米聚合物的合成与表征
International Journal of Green Nanotechnology Pub Date : 2012-07-01 DOI: 10.1080/19430892.2012.706188
K. Kumari, P. Singh, G. K. Mehrotra
{"title":"Synthesis and Characterization of Rosiglitazone Loaded Magnetic Nanopolymer","authors":"K. Kumari, P. Singh, G. K. Mehrotra","doi":"10.1080/19430892.2012.706188","DOIUrl":"https://doi.org/10.1080/19430892.2012.706188","url":null,"abstract":"ABSTRACT The delivery of thiazolidine-2,4-dione therapies directly to the site would ultimately allow higher concentrations of the drug to be delivered and prolong circulation time in vivo to enhance the therapeutic outcome of this drug. Therefore, we sought to design magnetic based polymeric nanoparticles for the site directed delivery of rosiglitazone. We have synthesized Fe3O4 nanoparticles with an average size of 30 ± 2.5 nm and were well characterized by transmission electron microscopy (TEM), quasi elastic light scattering (QELS), and UV-Visible spectroscopic techniques. These Fe3O4 nanoparticles (NPs) were used to prepare rosiglitazone loaded magnetic polymeric nanoparticles (RMN) with an average size of 250 ± 5 nm. Fourier transform infrared (FT-IR) spectroscopy showed the encapsulation of rosiglitazone on the surface of the polymer matrix. The encapsulation of the Fe3O4 NPs on the surface of the polymer was confirmed by elemental analysis. We studied the drug loading efficiency of gelatin polymer...","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"142 1","pages":"339-344"},"PeriodicalIF":0.0,"publicationDate":"2012-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82894722","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
Photocatalytic and Conductivity Studies of Bi3+Substituted La2Zr2O7 Bi3+取代La2Zr2O7的光催化和电导率研究
International Journal of Green Nanotechnology Pub Date : 2012-07-01 DOI: 10.1080/19430892.2012.738145
G. Ravi, Suresh Palla, J. R. Reddy, N. K. Veldurthi, B. Kumar, M. Vithal
{"title":"Photocatalytic and Conductivity Studies of Bi3+Substituted La2Zr2O7","authors":"G. Ravi, Suresh Palla, J. R. Reddy, N. K. Veldurthi, B. Kumar, M. Vithal","doi":"10.1080/19430892.2012.738145","DOIUrl":"https://doi.org/10.1080/19430892.2012.738145","url":null,"abstract":"ABSTRACT Trivalent bismuth substituted La2Zr2O7 pyrochlores of compositions La2-xBixZr2O7 (x = 0.2, 0.4 and 0.6) have been prepared by sol-gel method. All the samples were characterized by powder X-ray diffraction, IR spectroscopy, and SEM-EDS. These materials were found to crystallize in cubic lattice with space group . The unit cell parameters were deduced from the Rietveld refinement. The dc conductivity of all samples was measured in the temperature range 200–700°C. The photocatalytic activities of the samples were studied against methylene blue decomposition under sunlight. La2-xBixZr2O7 compounds showed enhanced photoactivity compared to La2Zr2O7.","PeriodicalId":13985,"journal":{"name":"International Journal of Green Nanotechnology","volume":"25 1","pages":"360-367"},"PeriodicalIF":0.0,"publicationDate":"2012-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84811061","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
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