The BiOBr flower-like microspheres were synthesized by in situ solvothermal method with the assistance of polyvinylpyrrolidone (PVP),and the as-prepared samples were characterized and analyzed by XRD,SEM,UV-Vis DRS techniques.Under the irradiation of mercury lamp,Chloramphenicol (CAP) was used as the substrate for degradation,and the effect of different PVP addition on the photocatalytic activity of BiOBr microspheres was discussed.The results shown that with the aid of the surfactant PVP,the sample size became smaller,the nanosheets that made up the microspheres became thinner,the specific surface area increased,the absorption band edge shifted red,and the forbidden band width became smaller.When the amount of PVP was 0.4g,the BiOBr-0.4 sample was prepared as uniform flower-shaped microspheres with a diameter of about 2μm,and a band gap of 2.61eV,showing the best photocatalytic activity,the degradation rate of CAP reached 74.5%,which was about 1.5 times that of pure BiOBr.
Gao Zhanyao, Li Huimin, Ding Tao, Tong Panrui
. Study on PVP assisted synthesis of BiOBr flower-like microsphere and its photocatalytic property[J]. New Chemical Materials, 2021
, 49(6)
: 258
-261
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.06.056
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