title: [Efficient oxidative degradation of tetrabromobisphenol A by silver bismuth oxide].
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.
authors.forename: Man-tang
authors.initials: MT
authors.lastname: Chen
authors.forename: Zhou
authors.initials: Z
authors.lastname: Song
authors.forename: Nan
authors.initials: N
authors.lastname: Wang
authors.forename: Yao-bin
authors.initials: YB
authors.lastname: Ding
authors.forename: Hai-xing
authors.initials: HX
authors.lastname: Liao
authors.forename: Li-hua
authors.initials: LH
authors.lastname: Zhu
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D004396:Coloring Agents; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D011075:Polybrominated Biphenyls / Q000737:chemistry*; D018030:Silver Compounds / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D010087:Oxides; D011075:Polybrominated Biphenyls; D018030:Silver Compounds; C040225:disilver oxide; C033301:bismuth oxide; C020806:tetrabromobisphenol A; D001729:Bismuth