Ternary Magnetic Photocatalysts

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Presentation transcript:

Ternary Magnetic Photocatalysts Synthesis of core/shell/shell nanostructures for a water purification system. Presented by: Esteban Rodriguez-Ariza Dr. Jun Jiao’s Lab Research Experience for Undergraduates - 2013

Clean Water 3.4 million people die each year from water related diseases. 780 million people lack access to clean water. Facts from : http://water.org/water-crisis/water-facts/water/

Water Purification Methods Physical: filtration, sedimentation, distillation Biological: slow sand filters, biologically active carbon Chemical: flocculation, chlorination, UV treatment

Our Proposed Solution Make nanoparticles that break down organic contaminants in water. Design sustainable water purification system.

Overview Ternary Magnetic Photocatalysts: Concept Methods Results Future directions

Photocatalysis Image from Bioecotech: http://bioecotech.com/Photo/Product%20-%20Ebuzz/photocatalytic.jpg

Basic Concept Photocatalyst Protects Core Magnetic

Crystallized surface by calcination Methods Synthesis: Solvothermal core synthesis Sol-Gel silicon oxide coating Sol-Gel titanium oxide coating Final Product: Crystallized surface by calcination

Characterization and Analysis SEM/TEM Elemental confirmation by EDX Raman Spectroscopy Anatase phase confirmation UV/Vis Spectrophotometry Degradation studies

SEM Images Core Core/Shell Core/Shell/Shell Crystallized Ternary Particles

Degradation Studies Clean this up!!!!

Future Directions Layer optimization Degradation experiments Further characterization: Crystal structure analysis Magnetic studies Toxicity in biological systems

Conclusion outline Designed sustainable water purification system Synthesized ternary magnetic photocatalysts Successfully obtained degradation results

Acknowledgements Dr. Jun Jiao and Jiao group Simon Fowler Emilio Molina Portland State University Ken Guenther National Science Foundation This material is based upon work supported by the National Science Foundation under Grant No. 1004737. Water facts from water.org: http://water.org/water-crisis/water-facts/water/ Photocatalysis image from BioEcotech Official Website: http://bioecotech.com/Photo/Product%20-%20Ebuzz/photocatalytic.jpg

Questions?

Raman Data