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5424482 
Journal Article 
COMPLETE HETEROGENEOUSLY PHOTOCATALYZED TRANSFORMATION OF 1,1-DIBROMOETHANE AND 1,2-DIBROMOETHANE TO CO2 AND HBR 
Nguyen, T; Ollis, DF 
1984 
1 
Journal of Physical Chemistry
ISSN: 0022-3654 
88 
16 
3386-3388 
WOS:A1984TD54900002 
Dissolved 1,2-dibromoethane and its isomer (1,1-dibromoethane) were completely degraded by heterogeneous photocatalysis to HBr and CO2 in dilute aqueous suspensions of near-UV illuminated titanium dioxide (0.1 wt %). No observable intermediate was found for conversion of 1,1-dibromoethane, but during photocatalyzed degradation of 1,2-dibromoethane, vinyl bromide (CH2=CHBr) was detected as a photocatalytically unstable intermediate. The reaction rates of these photocatalytic conversions followed a simple kinetic model. The specific rate constants from the present and recent bromomethane studies are in the approximate ratio of 2.8:1.9:1.8:1.0 bromoform:dibromomethane:1,1-dibromoethane:1,2-dibromoethane (EDB). No corresponding homogeneous photoreaction or heterogeneously catalyzed dark reaction was observed for either dibromoethane. © 1984 American Chemical Society.