Role of support material in the photodegradation of colored organic compounds
- Notre Dame Univ., IN (United States). Radiation Lab.
- Indiana Univ. Northwest, Gary, IN (United States). Dept. of Chemistry
Naturally abundant support materials such as silica, alumina, titania and clays provide ordered, two-dimensional environments for effecting and controlling photochemical processes of organic compounds more efficiently than can be attained in homogeneous solutions. Little effects has been made so far to study how the intrinsic properties of such support materials can influence the photochemical degradation of colored organic compounds. In the present study, we have employed 1,3-diphenylisobenzofuran (DPBF) as a model compound since it strongly absorbs in the visible and is photochemically reactive. In the absence oxygen the semiconductor supports TiO{sub 2} and ZnO catalyze the photodegradation by accepting electrons from excited DPBF. In oxygenated samples, the primary process of photodegradation involves reaction with singlet oxygen. Steady state photolysis and diffuse reflectance laser flash photolysis experiments which elcuidate the mechanistic and kinetic aspects of DPBF photodegradation on Al{sub 2}O{sub 3}, TiO{sub 2} and ZnO surfaces will be described in this paper.
- Research Organization:
- Notre Dame Univ., IN (United States). Radiation Lab.
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76ER00038
- OSTI ID:
- 10106626
- Report Number(s):
- DOE/ER/00038-3435; NDRL-3435; CONF-920444-7; ON: DE92004313
- Resource Relation:
- Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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