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Korean Journal of Metals and Materials > Volume 55(4); 2017 > Article
Korean Journal of Metals and Materials 2017;55(4): 264-273. doi: https://doi.org/10.3365/KJMM.2017.55.4.264
Fabrication of Porous Titania Particles from Complex Fluids by Spray Drying Process and Their Applications
Young-Sang Cho
Department of Chemical Engineering and Biotechnology, Korea Polytechnic University, Siheung 15073, Republic of Korea
Correspondence  Young-Sang Cho ,Tel: +82-31-8041-0612, Email: yscho78@kpu.ac.kr
Received: 28 June 2016;  Accepted: 21 September 2016.  Published online: 6 April 2017.
ABSTRACT
In this study, a spray drying system was used to prepare macroporous titania micro-particles for applications including UV blocking materials and photocatalysts. To synthesize the macroporous particles a colloidal templating method using polymeric beads as sacrificial templates and a titania nano-colloid as precursor material was adopted. The resulting porous titania particles were mixed with distilled water to measure their light transmittance, and to assess their UV blocking performance. To demonstrate another application, the organic dye Rhodamine B was decomposed using the macroporous titania micro-particles as a photocatalyst for water purification. The spray drying system was also utilized to fabricate porous iron oxide particles using iron chloride liquid precursor. Following a reduction reaction, the porous iron oxide particles fabricated in this study are also potentially applicable as intermediates for the synthesis of porous metal particles, which have various applications including porous surface burners, artificial bones, thermal insulation, and sound absorbers.
Keywords: porous titania particles, spray dying, UV blocking property, photocatalyst, porous iron oxide particles
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