Photocatalytic degradation of dyes by AgBr/Ag3PO4 and the ecotoxicities of their degraded products

doi:10.1016/S1872-2067(15)61078-6

Abstract

Abstract:

Ag₃PO₄ powders were prepared through a precipitation reaction between AgNO₃ and precipitating agent solutions that were prepared by adjusting the amount of H₃PO₄ in the Na₃PO₄solutions. The Ag₃PO₄ powders prepared from the precipitation solution with a pH of 6 showed the highest photocatalytic activity for decolorizing the methylene blue and rhodamine B dyes. These Ag₃PO₄ powders were further modified by the addition of KBr solutions to obtain AgBr/Ag₃PO₄ powders and these photocatalysts can decolorize the anionic dyes as reactive orange and methyl orange. The reactive species involved in the photocatalytic degradation process were evaluated for their inhibitory activity using the appropriate scavengers. After photocatalysis, mass spectrometry confirmed that the dyes were degraded to smaller molecules. The ecotoxicities of the dye solutions before and after treatment were evaluated by studying their ability to inhibit the growth of the bioindicator Chlorella vulgaris.

Key words: Silver phosphate, Silver bromide, Photocatalytic degradation, One-pot synthesis, Ecotoxicity

Pongsaton Amornpitoksuk, Sumetha Suwanboon. Photocatalytic degradation of dyes by AgBr/Ag₃PO₄ and the ecotoxicities of their degraded products[J]. Chinese Journal of Catalysis, 2016, 37(5): 711-719.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(15)61078-6

https://www.cjcatal.com/EN/Y2016/V37/I5/711

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Photocatalytic degradation of dyes by AgBr/Ag₃PO₄ and the ecotoxicities of their degraded products

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