| 초록 |
In this study, heterostructure photocatalysts comprising different amounts of zirconium oxide (ZrO2) over carbon nitride (CN) were synthesized via a simple thermal exfoliation, followed by a precipitation method. The successful photocatalytic detoxification activity of the as-prepared catalysts was analyzed against 2-chloroethyl ethyl sulfide (CEES) under simulated solar light and natural sunlight irradiation in dry and humid air. As the CN/ZrO2 catalysts demonstrated a high surface area and oxygen doping, the addition of small amounts of the ZrO2 phase could lead to enhanced photoreactivity due to improved surface chemistry. The as-prepared catalyst (CN/ZrO2-II) degraded 95% of CEES under simulated solar light and 70% under natural sunlight within 90 min. Based on analysis results, a reaction mechanism was suggested. The photo-detoxification of CEES was associated with the generation of holes (h+) and activation of oxygen to superoxide radicals (•O2). The activity of the used photocatalyst could be recovered to 82% of the fresh catalyst activity via simple water washing. |
