Green synthesis of nanoparticles

Green synthesis of nanoparticles

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  Green synthesis ofTiO₂ Nanoparticles Using Aloe Vera Extract REON SYLVESTER D CUNHA 199326 ST ALOYSIUS COLLEGE (AUTONOMOUS) MANGALURU, KARNATAKA
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  Contents • Introduction andproperties of TiO₂ • Extraction • Synthesis of nanoparticles • Characterization • Conclusion • Applications
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  Introduction • Aloe Verais the oldest medicinal plant known, containing a large range of vitamins. • It is a powerful detoxifier, antiseptic and has anti viral properties. • TiO₂ is poorly soluble, non flammable and thermally stable. • 3 phases- Anatase, Rutile and Brookite. • Anatase – Large band gap, hydrophobicity, non- wettability.
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  3 Phases ofTitanium Dioxide
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  Properties of TiO₂ •Low cost and high dielectric constant • Strong oxidising agent • High resistivity • Large band gap • High surface to volume ratio
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  The extraction
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  Synthesis of nanoparticles •Dissolve 1 N of Titanium Chloride in 100 ml of Millipore water. • Add extract drop wise under constant stirring. • Mixture continuously stirred for 4 hours. • Nano particles are formed and separated using what man filter paper. • Nano particles are dried at 100° C overnight and calcined at 500° C for 4 hours.
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  Characterization • TGA/DTA Curvesof TiO₂ Nanoparticles
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  X Ray Diffraction
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  PARTICLE SIZE ANALYZER
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  FTIR
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  SEM and TEM
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  CONCLUSION • Successfully synthesizedusing green synthesis method. • Average crystallite size of the sample was 20nm. • Average Particle size was 32nm. • Tetragonal structure was observed. • TiO₂ vibrational bonds were observed in the FTIR spectrum. • Weight loss was 0.98% • The particles are in nano range
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  Applications of TiO₂nanoparticles • Chemical Sensors • Water splitting for hydrogen production • Microelectronics • Dye sensitized solar cell • Photocatalysis • Charge spreading devices • Self cleaning devices • Disinfection of waste water
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  References • Synthesis ofTiO₂ Nanoparticles from orange fruit waste, K Ganapathi Rao, CH. Ashok, K. Venkateshwara Rao, CH. Shilpa Chakra ,V. Rajendar International Journal of Multidisciplinary Advanced Research Trends,ISSN: 2349-7408, February 2015 • Aadarsh Mishra, analysis of Titanium Dioxide and its applications in industry, Int J. Mech Eng&Rob . Res 3(3), 2014 • Jie Wu, Guoren Bai, Jeffrey A. Eastman, Guangwen Zhou and Vijay K. Vasudevan, Synthesis of TiO₂ Nanoparticles using chemical vapor Deposition, Materials Research society, 879E, Z7.12.01.2005 • Recent advances in syntheses, properties and applications of TiO2 nanostructures Imran Ali, *ab Mohd Suhail,b Zied A. Alothmanc and Abdulrahman Alwarthanc Royal Society of Chemistry