H-acid in aqueous solution can be degraded more than 72.5% after 3-hour solar irradiation. The rate of photocatalytic oxidation can be expressed by Langmuir-Hinshelwood Equation. The apparent rate constant K is 0.070 4 min-1.

• 太阳光照射3 h；H酸脱色率达到72.；5%25；反应速率遵从Langmuir-Hinshelwood方程；表观速率常数K′=0