▎ 摘　　要

NOVELTY - Preparing Z-type composite photocatalyst, comprises e.g. (i) mixing concentrated sulfuric acid with graphite powder, phosphorus pentoxide and potassium persulfate, adding deionized water, stirring, then cooling, centrifuging, washing and drying obtained solid to obtain graphite powder, then mixing with sodium nitrate, reacting with concentrated sulfuric acid and potassium permanganate until solution turns bright yellow, filtering, washing, and drying to obtain graphene, (ii) heating melamine, cooling, and calcining to obtain graphite-phase carbon nitride, and (iii) adding graphite-phase carbon nitride and graphene to ethanol and mixing by ultrasonication, and adding potassium bromide for ultrasonication to form solution A, dissolving bismuth(III) nitrate in acetic acid or ethanol to obtain solution B, then slowly dropping solution A into the solution B, adjusting pH, placing in autoclave for heating, centrifuging obtained product, washing, drying, and grinding to obtain photocatalyst. USE - The Z-type composite photocatalyst is useful for removing pharmaceutical and personal care product pollutants including antibiotics, synthetic musks, painkillers, antihypertensive drugs, contraceptives, hypnotics, slimming drugs, hair sprays, hair dyes, and bactericides (claimed). ADVANTAGE - The Z-type composite photocatalyst has high degradation efficiency. DETAILED DESCRIPTION - Preparing Z-type composite photocatalyst, comprises (i) mixing concentrated sulfuric acid with graphite powder, phosphorus pentoxide and potassium persulfate, reacting by stirring, adding deionized water, continuously stirring, then cooling, centrifuging, washing and drying obtained solid to obtain graphite powder, then mixing graphite powder and sodium nitrate, adding concentrated sulfuric acid and potassium permanganate, stirring and reacting until the solution turns bright yellow, filtering, washing, and drying to obtain graphene (RGO), (ii) heating melamine, cooling to obtain yellow product, and then performing secondary calcination to obtain graphite-phase carbon nitride (g-C3N4), and (iii) adding graphite-phase carbon nitride and graphene respectively to ethanol and mixing after ultrasonication, and then adding potassium bromide (KBr) for ultrasonication to form solution A, dissolving bismuth(III) nitrate (Bi(NO3)3) in acetic acid or ethanol to obtain solution B, then slowly dropping solution A into the solution B under vigorous stirring condition, adjusting pH of the resulting mixed solution, placing in autoclave for heating, centrifuging obtained product, washing, drying, and grinding to obtain BiOBr/g-C3N4/RGO photocatalyst. An INDEPENDENT CLAIM is also included for Z-type composite photocatalyst prepared by the above method.