Abstract: The Chinese white cabbage was treated by nanomaterial device (TiO2-ZnO compound) at different temperatures. The effects of temperature on the photocatalytic degradation of eleven organophosphorus pesticide residues in the vegetable treated by the nanomaterial device were discussed. The results indicated that the degradation rate increases with the temperature decreasing from 30℃ to 0℃. The longer the treatment time,the higher degradation rates of the pesticide residues,and the increases of the degradation rate tend to flat after 1 hour. The 400 W ultraviolet mercury lamp irradiation can raise the degradation rates of the organophosphorus pesticide residues in the vegetable.

Key words: nanomaterial device, photocatalytic degradation, vegetable, pesticides residue, temperature