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Photocatalytic dye degradation by ZnO nanoparticles prepared from X 2 C 2 O 4 (X = H, Na and NH 4 ) and the cytotoxicity of the treated dye solutions

2016; Elsevier BV; Volume: 177; Linguagem: Inglês

10.1016/j.seppur.2016.12.040

1873-3794

Khanitta Intarasuwan, Pongsaton Amornpitoksuk, Sumetha Suwanboon, Potchanapond Graidist,

TiO2 Photocatalysis and Solar Cells

ZnO nanostructures were synthesized by the decomposition of ZnC2O4·2H2O that was prepared using a precipitation reaction between Zn2+ and three different precipitating agents (H2C2O4, Na2C2O4, and (NH4)2C2O4). The ZnO powders prepared using H2C2O4 as the precipitating agent had the highest surface area and showed the highest photocatalytic degradation efficiency of methylene blue and reactive orange aqueous solutions. The cytotoxicities of the dye solutions after photocatalysis under blacklight illumination were also tested using L929 mouse fibroblast cells. The treated methylene blue solution showed a lower cytotoxicity than its untreated solution. However, this method was probably not effective with the reactive orange as an ionic dye because there was a repulsive force between the negative charges of the reactive orange and the cell membrane of L929 cells.