ZincOxide nanoparticles

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Information about ZincOxide nanoparticles
Science-Technology

Published on February 16, 2014

Author: ankitgrover142

Source: authorstream.com

ZnO Nanoparticles: Synthesis, Characterization, and Ecotoxicological Studies: ZnO Nanoparticles: Synthesis, Characterization, and Ecotoxicological Studies Represent By: ANKIT GROVER MSc( h.s )2 nd year Overview:-: Overview:- Introduction Experimental Section Results and Discussion Conclusion What Is The Meaning Of Nanoparticles?:  Factor Prefix Symbol 10 -1 deci d 10 -2 centi c 10 -3 milli m 10 -6 micro µ 10 -9 nano n 10 -12 pico p 10 -15 femto f Actually the nanoparticles are particles with sized between 100 and 1 nanometers GOLD NANOPARTICLES What Is The Meaning Of Nanoparticles? Zinc Oxide (ZnO): Zinc Oxide ( ZnO ) Molecular formula ZnO Molar mass 81.408 g/ mol Appearance White solid Odor odorless Density 5.606 g/cm 3 Melting point 1975 °C (decomposes ) Boiling point 2360 °C Solubility in water 0.16 mg/100 mL (30 °C) Band gap 3.3 eV Refractive index ( n D ) 2.0041 Two types of crystal of zno also exist’s due to diff. Extent of oxygen in it. Introduction Zinc oxide is an inorganic compound with the formula ZnO . ZnO is a white powder that is insoluble in water, In materials science, ZnO is a wide- bandgap semiconductor. PowerPoint Presentation: Why We Choose Zno Nanoparticles For Ecotoxicological Studies Not Its Large Particle Form? Nanomaterials have different toxicity profiles compared with larger particles because of their small size and also their high reactivity. When the particle size decreases, there is a tendency to increase the toxicity, even if the same material is relatively inert in bulk form (e.g., SiO 2 , carbon black, TiO 2 , ZnO ). The nanoparticles, due to their nanoscale , shape, and consequently huge surface area, may interact more efficiently with biological systems, producing important toxicity. The toxicological impact of nanoparticles also depends also on the biological target used. NANO PARTICLES SOLUTION POWDER FORM ZnO PowerPoint Presentation: The study of the physicochemical properties of ZnO nanoparticles prepared without and with protective agents such as tri n- octylphosphine oxide(TOPO) and brij-76 before and after contact with the culture media The study of the Eco toxic impact of these nanoparticles on anabaena flos-aquae and euglena gracilis photosynthetic microorganisms. The Present Work Is Focused On: PowerPoint Presentation: SYNTHESIS OF ZnO NANOPARTICLE Experimental Section: ZnO nanoparticle synthesized in the diethylene glycol(DEG) medium by forced hydrolysis of zinc acetete . The general procedure involves addition of zinc acetate to 80ml of polyol and water to reach a final conc between 0.06 and 0.6 mol /lit. To control particle size and shape ,protective agents such as topo (tri-n- octylphosphine oxide) and brij 76 ( polyoxyethylene stearyl ether) are used. Hydrolysis ratio was varied from 10 to 80 PowerPoint Presentation: All photosynthetic microorganism were selected should be able to fulfill two conditions: They are able to synthesis some metallic nanoparticles by synthetic route. They may alive for 3 months in the presence of these nanoparticles. EUGLENA GRACILLICS ANABENA FLOS AQUAE Ecotoxicity Of Zno Nanoparticles Is Investigate By Using Two Biological Target ‘S Results and Discussion:: Results and Discussion: TEM Micrographs shows that the size of ZnO nanoparticle is the variable function of: The nature of the protective agent added during ZnO formation. The hydrolysis ratio. PowerPoint Presentation: SPHERICAL SUBMICROMETER-SIZED NANOPARTICLES (D=0.2 ( 0.05 Μ M), NANORODS OF ZnO CROWNMORPHOLOGY WERE OBSERVED AT H=300 Tem Micrograph For Zno Preapared Without Addition Of Protective Agent : PowerPoint Presentation: IN Presence of TOPO: SPHERICAL NANOPARTICLES WERE OBTAINED D=2.0 ( 0.4 NM) NANORODS OF ZnO 30<LENGTH<200 SPHERICAL PARTICLES WITH NARROW SIZE Tem Micrograph For ZnO Preapared With Addition Of Protective Agent PowerPoint Presentation: IN presence of Brij-76: Agglomerates were obtained by coalescence of spherical nanoparticles with size vary with H value. Tem Micrograph For ZnO Preapared With Addition Of Protective Agent Structure And Surface Charge Of Zno Nanoparticles: Structure And Surface Charge Of Zno Nanoparticles Before contact with microorganisms ,zeta potenial of ZnO NP’s with varying P H of medium was measured after 30 min of contact betweennps and P H solution. The zero point charge for ZnO nanoparti-cle was at P H 9. ZnO nanoparticle was suspended in buffer solution at P H 2,4,7,9 and 12 by addition of HCL and NaOH soln. There is – ve Zeta Potential b/w P H 5 TO 9 Study Of Polysaccharide Interactions With The ZnO Nanoparticles: Study Of Polysaccharide Interactions With The ZnO Nanoparticles ZnO Nanopaticles adsorption on the calcium alginate microcapsules was microcapsules was estimated using EDS analysis same type of NP’s show different extent of adsorption with time function in different medium. More is the lyophilization,More is % wt adsorption IN POLYOL IN WATER Photosynthetic Microorganism Description And Characterization: Photosynthetic Microorganism Description And Characterization ANABAENA FLOS AQUAE EUGLENA GRACILLUS It is kind of algae.it can eat food like animal and photosynthesize like plants do. It is also called blue green bacteria that obtain their energy through photosynthesis’. Ecotoxicity and Analysis of ZnO Nanoparticles in the Presence of Microorganisms.: Ecotoxicity and Analysis of ZnO Nanoparticles in the Presence of Microorganisms. Photosynthetic activities of (a) Anabaena flos-aquae and (b) Euglena gracilis after addition of ZnO nanoparticles . [ Zn]=10-3 M. PowerPoint Presentation: After addition of ZnO , ZnO TOPO, and ZnO-Brij-76 nanoparticles (H = 10), a progressive decrease of photosynthetic activity was observed in the first 10 days for both microorganisms Anabaena flos-aquae , after 10 days of incubation, an increase of the photosynthetic activity was observed after contact with ZnO and ZnO-Brij-76 nanoparticles. On the other hand, the presence of ZnO -TOPO nanoparticles caused cellular death PowerPoint Presentation: TEM micrographs of Anabaena flos-aquae after contact with ZnO , ( b) ZnO -TOPO, and ( c) ZnO-Brij-76 nanoparticles. [Zn] =10 -3 M . PowerPoint Presentation: TEM micrographs of Euglena gracilis after contact with ZnO , ( b) ZnO -TOPO, and ( c) ZnO-Brij-76 nanoparticles. PowerPoint Presentation: TIM Micrographs can be developed by using trypan blue Dye which is a vital stain used to selectively color dead tissues or cells blue. D ead cells are shown as a distinctive blue color under a photonic microscope Conclusions: Conclusions Now the Question is arise what the experiment want to ask???and why?? As dicussed earlier,this experiment shows that how different size, conc ., Hydrolysi ratio effect on living system(microalgae’s) by intracting with them How the toxicity is the variable function of size pf nanoparticles. The nature of the biological system can strongly influence the ecotoxicological results of nanoparticles PowerPoint Presentation: A better understanding and assessment of the toxicity and Eco toxicity of nanoparticles can SAVE ENVIORMENT Because of the environmental use of nanoparticles and their unintentional release, the exposure of algae, cyanobacteria, plants , and fungi to these new materials is a reality cause eco-toxicity REFERENCES: REFERENCES 1.Gerber. C.,Lang ,H.P.Nat,NANOTECHNOL,2006 2.Gujman , K.A.D,.Taylor M . R.Banifield Environ . sci.Techanol 2006 3.Ji.S.L.Ye , C.H.Jmater . Sci.Techonol 2008 4.Feldmann, C.Adv.Func.Mater 2003 5.Zhang,L,Jiang . Y.Ding.Y.,Povery , M ,.YORK ,D ,J Nanopart.RES 2007 6.Kumar C.S.S.R.,Ed Nanomaterial -toxicity and enviromental issues Wiley Weinhein 2006 7.Brayner . R .Ferrari – iliou R. Nanotoday 2008. PowerPoint Presentation: THANK U!!!!!!! For any query: Text me on ankitgroverr@hotmail.com +918968165400;+917837785400 Preserve our planet, Go Green…….: Preserve our planet, Go Green…….

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