AI Article Synopsis
- - Silver bismuth oxide (BSO) was synthesized using a simple ion exchange-coprecipitation method with specific chemical precursors and was tested for its effectiveness in degrading tetrabromobisphenol A (TBBPA).
- - The optimal conditions for TBBPA degradation were found to be a 1:1 molar ratio of Ag/Bi and a BSO dosage of 1 g/L, resulting in complete degradation of TBBPA and over 80% removal of total organic carbon in just 7 minutes.
- - Analysis showed that the degradation process involved several steps, including debromination and cleavage of chemical groups, with singlet oxygen identified as the primary agent responsible for the degradation of T
Article Abstract
Silver bismuth oxide(BSO) was prepared by a simple ion exchange-coprecipitation method with AgNO3 and NaBiO, .2H2O as raw materials, and then used to oxidatively degrade tetrabromobisphenol A(TBBPA). Effects of the molar ratio of Ag/Bi during BSO preparation and the BSO dosage on the degradation of TBBPA were investigated. The results showed that under the optimized conditions (i.e., the Ag/Bi molar ratio of 1:1, BSO dosage of 1 g x L(-1), 40 mg x L(-1) of TBBPA was completely degraded and the removal of total organic carbon achieved more than 80% within 7 min. The degradation intermediates of TBBPA were identified by ion chromatography, gas chromatograph-mass spectrometer and X-ray photoelectron spectroscopy. The degradation pathway of TBBPA included the debromination, the cleavage of tert-butyl group and the open epoxidation of benzene ring. Based on a quenching study of NaN3, singlet oxygen was proved to play a dominant role in the TBBPA degradation.
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