▎ 摘　　要

NOVELTY - Preparing graphene-supported bismuth oxychloride-basic bismuth oxycarbonate photocatalyst comprises (i) bismuth oxycarbonate solution is obtained by dissolving sodium carbonate and cetyltrimethylammonium bromide in deionized water and stirring uniformly (ii) centrifuging the mixture containing bismuth oxycarbonate, washing the obtained solid product multiple times and drying, (iii) bismuth oxychloride-bismuth oxycarbonate solution is obtained by dissolving cerium nitrate in deionized water and stirring uniformly to obtain an aqueous solution of cerium nitrate having a molar concentration of 0.06-0.08 mmol/ml, dissolving potassium chloride, citric acid and bismuth oxycarbonate in deionized water and stirring uniformly to obtain a mixture C, mixing an aqueous solution of cerium nitrate and mixture C to obtain a bismuth oxychloride-bismuth oxycarbonate solution reaction solution, dispersing graphene solution, placing in autoclave, reacting, washing and drying. USE - The method is useful for Preparing graphene-supported bismuth oxychloride-basic bismuth oxycarbonate photocatalyst (claimed). DETAILED DESCRIPTION - Preparing graphene-supported bismuth oxychloride-basic bismuth oxycarbonate photocatalyst comprises (i) bismuth oxycarbonate solution is obtained by (ia) dissolving sodium carbonate and cetyltrimethylammonium bromide in deionized water and stirring uniformly to obtain a mixture A, where the solid-liquid ratio of sodium carbonate: cetyltrimethylammonium bromide: deionized water is (3-3.5) g:(0.5-0.7) g:(45-50) ml, (ib) dissolving cerium nitrate and citric acid in the aqueous solution of nitric acid and stirring uniformly to obtain mixture B, where the solid-liquid ratio of cerium nitrate:citric acid: aqueous solution of nitric acid is (1.7-2) g:(0.5-0.6) g:(45-51) ml, and (ic) mixing mixture A and mixture B, and stirring uniformly to obtain a mixture containing bismuth oxycarbonate, where the molar ratio of carbonate in mixture A: bismuth in mixture B: is (2-2.5) (ii) centrifuging the mixture containing bismuth oxycarbonate, washing the obtained solid product multiple times and drying, (iii) bismuth oxychloride-bismuth oxycarbonate solution is obtained by (iiia) dissolving cerium nitrate in deionized water and stirring uniformly to obtain an aqueous solution of cerium nitrate having a molar concentration of 0.06-0.08 mmol/ml, (iiib) dissolving potassium chloride, citric acid and bismuth oxycarbonate in deionized water and stirring uniformly to obtain a mixture C, where the mass ratio of potassium chloride: citric acid: bismuth oxycarbonate: deionized water is (2-5) mmol:(0.5-2) mmol:(100-300) mg:(20-60) ml, (iiic) mixing an aqueous solution of cerium nitrate and mixture C to obtain a bismuth oxychloride-bismuth oxycarbonate solution reaction solution, where the ratio of cesium ion in the mixture: chloride ion of mixture C is 1:1, (iv) preparing bismuth oxychloride-bismuth oxycarbonate photocatalyst (iva) reacting bismuth oxychloride-bismuth oxycarbonate reaction solution at 60-90 degrees C for 1-5 hours to obtain a mixture containing a bismuth oxychloride-bismuth oxycarbonate photocatalyst, (ivb) centrifuging the mixture containing the bismuth oxychloride-bismuth oxycarbonate photocatalyst, washing and drying, (v) dispersing the graphene solution (va) dissolving the graphene in a mixed solution of deionized water and absolute ethanol, and ultrasonically dispersing to obtain a graphene solution having a mass concentration of 0.2-0.4 mg/ml, (vb) mixing the graphene solution and the bismuth oxychloride-bismuth oxycarbonate photocatalyst, and uniformly stirring to obtain a mixed solution of graphene and bismuth oxychloride-bismuth oxycarbonate photocatalyst, where the mass ratio of graphene: bismuth oxychloride-bismuth oxycarbonate photocatalyst is 1:(20-100), and (vi) graphene-loaded bismuth oxychloride-bismuth oxycarbonate photocatalyst is obtained by (via) placing mixed solution of graphene and bismuth oxychloride-bismuth oxycarbonate photocatalyst in an autoclave, reacting at 140-180 degrees C for 1-5 hours at 3-4 MPa to obtain graphene-loaded bismuth oxychloride-bismuth oxycarbonate photocatalyst, and (vib) centrifuging the mixture containing the graphene-supported bismuth oxychloride-bismuth oxycarbonate photocatalyst, washing and drying. An INDEPENDENT CLAIM is also included for preparing the graphene load bismuth oxychloride basic bismuth oxide photo-catalyst by the steps as mentioned above.