Titania by spray pyrolysis for photocatalytic destruction of organics in aqueous solutions

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:430488

Fotou, G P; Himebaugh, L; Kodas, T T ^[1]; Wu, M ^[2]

---

1. Univ. of New Mexico, Albuquerque, NM (United States)
2. Kemira Pigments, Inc., Savannah, GA (United States)

In this study, the potential of spray pyrolysis and spray calcination for the synthesis of effective titanium dioxide photocatalysts is explored. The product titanium dioxide powders were used in the photoassisted oxidation of salicylic acid in aqueous solutions. Titania particles were produced by spray pyrolysis of dihydroxybis titanium solutions in water at concentrations between 20 to 70% by volume at temperatures from 500 to 1100{degrees}C. Powders were made by spray calcination of titanium hydrolysate solutions at temperatures from 700 to 900 {degrees}C. Spray pyrolysis produced titania particles which were partially hollow. Spray calcination resulted in agglomerates which consisted of 15 nm primary particles that showed high photoactivity in the photooxidation of aqueous salicylic acid solutions. Doping with palladium oxide or ruthenium oxides did not improve the photocatalytic activity of these powders. 6 refs., 3 figs.

• OSTI ID: 430488
• Report Number(s): CONF-960730--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
54 ENVIRONMENTAL SCIENCES
CALCINATION
CHEMICAL PREPARATION
HETEROGENEOUS CATALYSIS
PHOTOLYSIS
POWDERS
PYROLYSIS PRODUCTS
SALICYLIC ACID
TITANIUM OXIDES