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

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

Pongsaton Amornpitoksuk ^a,c,, ,
Sumetha Suwanboon ^b,c

1.
a Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla, 90112 Thailand;
2.
b Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla, 90112 Thailand;
3.
c Center of Excellence in Nanotechnology for Energy (CENE), Prince of Songkla University, Hat-Yai, Songkhla, 90112 Thailand

Corresponding author: Pongsaton Amornpitoksuk,
Received Date: 14 January 2016
Available Online: 3 March 2016

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.
- Silver phosphate,
- Silver bromide,
- Photocatalytic degradation,
- One-pot synthesis,
- Ecotoxicity
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Photocatalytic degradation of dyes by AgBr/Ag3PO4 and the ecotoxicities of their degraded products

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