Abstract
A variety of chlorinated organic wastes were photodecomposed with p-CuO-modified TiO2 particles (denoted CuO/TiO2). Based on the photoactivity measured in oxygenated solutions containing sodium 2,2′-dichloropropionate, the photoactivity of TiO2 is significantly enhanced with p-CuO loading; in the case with 0.4 wt% of CuO, the activity is increased by a facor of 4. Photochemical-TiO2-slurry cell techniques and voltammetric characterizations suggest this CuO-promoted enhancement is likely to result from the acceleration of oxygen reduction at TiO2 via CuIIO/CuIO. Long-term tests showed that these CuO/TiO2 particles are photochemically robust; within 100-hours' continuous photolysis, insignificant loss in photoactivity was detected. However, increasing loading of p-CuO may jeopardize the photoactivity, due to the deterioration in the TiO2 absorbability of UV irradiation.
Original language | English |
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Pages (from-to) | 21-27 |
Number of pages | 7 |
Journal | Journal of the Chinese Chemical Society |
Volume | 43 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1996 |
Keywords
- Chlorinated organics
- n-Titanium dioxide
- p-Copper oxide
- Photochemicalslurry cell
- Photodegradation
ASJC Scopus subject areas
- Chemistry(all)