▎ 摘　　要

NOVELTY - Preparing bromine bismuth oxide chloride (010)/graphene heterojunction comprises ultrasonically dispersing graphene in deionized water to prepare solution A, dissolving bismuth nitrate pentahydratre in nitric acid and stirring to obtain solution B, dissolving potassium bromide and potassium chloride in deionized water to prepare solution C, slowly adding the solution A into the solution B, ultrasonically dispersing to prepare solution D, adding sodium hydroxide solution, adding solution C in a drop wise manner, heating, cooling after the reaction, washing the precipitate and drying. USE - The graphene heterojunction is useful for photo-catalytic degradation of organic pollutants (claimed). ADVANTAGE - The heterojunction: has strong light absorption property, high photo-catalytic efficiency; does not easily dissociate; promotes separation of photo-generated electrons and holes, thus improving the photo-catalytic performance; and broadens the light response range. DETAILED DESCRIPTION - Preparing bromine bismuth oxide chloride (010)/graphene heterojunction, comprises (a) ultrasonically dispersing graphene in deionized water for 15-30 minutes at a power of 60-100 W at 30-50 degrees C and continuously stirring uniformly for 30-60 minutes to prepare solution A, (b) dissolving bismuth nitrate pentahydratre in nitric acid, stirring at 70-90 degrees C until completely dissolved, stirring for 60-90 minutes to obtain solution B, (c) dissolving potassium bromide and potassium chloride in deionized water to prepare solution C, where the mol ratio of bismuth nitrate pentahydratre and total sum of potassium bromide and potassium chloride is 1:1, (d) slowly adding the prepared solution A into the solution B at a speed of 5-15 drops/minute, stirring while adding, ultrasonically dispersing for 20-30 minutes at a power of 60-100 W at 30-50 degrees C, stirring for 30-60 minutes to prepare solution D, (e) slowly adding 2-4 mol/l sodium hydroxide solution into the solution D at a speed of 5-15 drops/minutes, adjusting the pH of the solution D to 6 and continuously stirring for 20-40 minutes, (f) taking the solution C into a dropping flask, adding into the solution D in a drop wise manner at a rate of 5-15 drops/minute, continuously stirring for 30-40 minutes to form solution E, (g) taking the solution E into a reaction kettle, heating to 160-180 degrees C at a rate of 2-4 degrees C/minute and maintaining the temperature for 12-24 hours, and (h) cooling after the reaction, washing the precipitate in the reaction kettle with absolute ethanol and deionized water, drying for 12-24 hours at 80-100 degrees C to obtain bromine bismuth oxide chloride (010)/graphene heterogeneous crystal plane/graphene heterojunction.