Photocatalytic degradation of ammonia over platinized titania

CHED 328

Lori A. Pretzer, lpretzer2@hotmail.com1, Philip J. Carlson, philipjcarlson@gmail.com2, and Joel E. Boyd1. (1) Department of Chemistry, Wayland Baptist University, Plainview, TX 79072, (2) Department of Chemistry, Iowa State University, Ames, IA 50010
Aqueous ammonia was degraded using platinum-modified titanium (IV) oxide (titania) solvent deposited on acrylic (PMMA) support materials. The catalyst was modified with platinum to enhance the selective oxidation of ammonia to nitrogen gas. The optimum platinum concentration and oxidation state for ammonia oxidation was investigated. Initial ammonia concentrations ranged from 42-48 ppm NH3-N. Total nitrogen reduction was verified by summing the concentrations of NO3-N, NO2-N, and NH3-N in solution during the course of the reaction. A 35.7 % reduction in the total concentration of dissolved nitrogenous species was observed in a 5.1 %(w/w) platinum/titania reactor.
 

Undergraduate Research Poster Session: Nanotechnology
11:00 AM-1:00 PM, Monday, April 7, 2008 Morial Convention Center -- Hall A, Poster

Division of Chemical Education

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008