文献类型：专利

英文题名：Coral-type porous structure of bromine iodide or silver photocatalyst with, prepared by alloying using silver-aluminum alloy, carrying out oxidation-precipitation by using hydrogen peroxide and potassium bromide, and performing ion exchange

作者：YANG F;BAO S;TAO Q;TIAN B;WANG S;WANG T;ZHU J;ZHANG J;XIONG T;WU P;YUE S

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY

申请号：CN103285893-B

公开日：2015-07-15

语种：英文

收录：DERWENT

摘要：NOVELTY - Coral-type porous structure of bromine iodide/silver photocatalyst, is claimed. The photocatalyst is prepared by (i) alloying using silver-aluminum alloy, and dissolving corrosive sodium hydroxide in aluminum, to obtain porous elemental silver; (ii) carrying out oxidation-precipitation by using hydrogen peroxide and potassium bromide as oxidizing agent and precipitating agent, respectively; (iii) performing ion exchange by dispersing silver bromide in potassium iodide solution, stirring, and reacting to obtain porous bromine iodide/silver; and (iv) carrying out UV light reduction treatment. USE - Used as a coral-type porous structure of bromine iodide/silver photocatalyst. ADVANTAGE - The method produces product having high visible light activity, and easy recycling capacity, than the traditional method, so that the product can efficiently degrade organic pollutants e.g. dye by using visible light. DETAILED DESCRIPTION - Coral-type porous structure of bromine iodide/silver photocatalyst, is claimed. The photocatalyst is prepared by (i) alloying by using silver-aluminum alloy as raw materials, and dissolving corrosive sodium hydroxide in aluminum to control the amount of sodium hydroxide added, to obtain coral-type structure of porous elemental silver; (ii) carrying out oxidation-precipitation by using hydrogen peroxide and potassium bromide as oxidizing agent and precipitating agent, respectively, and controlling the usage amount, to obtain coral-type structure of porous silver bromide; (iii) carrying out ion exchange by dispersing silver bromide in potassium iodide solution, stirring, and reacting to obtain porous bromine iodide/silver, and adjusting the mol ratio of bromine and iodine in the final product by controlling the amount of potassium iodide added; and (iv) dispersing porous silver bromoiodide in water, subjecting the liquid to UV light reduction treatment to obtain turbid liquid, and obtaining silver nanoparticles on the catalyst surface in-situ, and obtaining the product.