Study on Photocatalytic Degradation of Tetracycline Hydrochloride by B-g-C3N4/BiOBr Composites
Boron-doped g-C3N4(BCN-n)was synthesized by grinding and calcination,and then boron-doped g-C3N4/bismuth oxybromide(BCN-n/BiOBr)materials were prepared by solvothermal method for the photocatalytic degradation of tetracy-cline hydrochloride(TCH)pollutants.The photocatalytic performance of BCN-n/BiOBr materials was investigated under dif-ferent composite ratios,pH,catalyst dosages and different pollutant concentrations,and the materials were characterized and analyzed by TEM and XRD.The experimental results proved that the optimal composite mass ratio of BCN-2(BCN)∶BiOBr was 2∶1.Under the conditions of tetracycline hydrochloride solution concentration of 20 mg/L,stock solution pH 5.5,and catalyst dosage of 0.2 g/L,the degradation rate of tetracycline hydrochloride by BCN/BiOBr(2∶1)material reached 95.1％,compared with BCN and BiOBr materials under the same conditions,the degradation rates increased by 10.7％and 14.0％,respectively.The BCN/BiOBr photocatalyst is a promising photocatalytic material for the degradation of TCH.
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